Thornton, Colorado, USA
UpdatedWed, 13-Dec-2017 12:20am MST 


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Cool, damp weather conditions start off Thornton’s workweek

Monday, August 7th, 2017 4:58am MST

An almost fall-like day ahead for us. We will be under a steady cover of clouds with periods of drizzle, rain and thunderstorms being possible and temperatures well below normal.

The day starts with cloudy skies and you can expect similar coverage throughout. High temperatures today will only be in the mid to upper 60s offering one of our coolest days since May.

This morning some periods of rain will be possible then this afternoon and evening bring our best chance for precipitation coupled with perhaps some thunder.

Looking ahead at the balance of your week, you can expect temperatures to remain below normal with varying degrees of precipitation possible. Get a look at the extended forecast here.

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Al Gore’s Belle Meade: A Tennessee energy pit

Sunday, August 6th, 2017 5:10am MST

WASHINGTON, August 7, 2017 – According to the National Center for Public Policy Research Al Gore resides in a 10,070-square-foot Colonial-style home built in 1915 in the posh Belle Meade section of Nashville. According to the U.S. Census Bureau, Belle Meade is the eighth-wealthiest neighborhood in America. The home, on a 2.09-acre lot and that Gore… » Click here to read the rest of Al Gore’s Belle Meade: A Tennessee energy pit

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Images the day after a dangerous Oklahoma tornado show the destruction it left in its wake

Sunday, August 6th, 2017 5:05am MST

Tulsa, Okla., residents woke up to the devastation of an EF2 tornado that hit the town overnight, reports FOX23. 12:50pm – Survey team confirms tornado damage across central Tulsa. EF2 intensity also confirmed. Survey continues. Watch the video — NWS Tulsa (@NWStulsa) August 6, 2017 The tornado hit shortly after 1 AM, destroying multiple businesses. There… » Click here to read the rest of Images the day after a dangerous Oklahoma tornado show the destruction it left in its wake

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July 2017 weather recap: Thornton sees average temps but little precipitation

Thursday, August 3rd, 2017 7:38pm MST

The month of July might have seemed quite hot but in fact mercury readings were right near normal. What likely caused the misconception is the fact that we saw far less than normal rain.

High pressure did dominate for much of the month and while monsoonal flow did bring rain to eastern Colorado, it largely missed our area.  The Palmer Divide and southeastern Colorado were beneficiaries for much of the month but for us it wasn’t until the last week that we saw relief.

Thornton’s average temperature for the month came in at 74.1 degrees.  This is almost exactly matches Denver’s long-term July average of 74.2 degrees.  Out at DIA where the Mile High City’s official temperatures are taken, it shows a far warmer month with an average of 76.4 degrees.

Temperatures here ranged from a maximum of 99.2 degrees on the 19th down to a low of 50.1 degrees on the morning of the 1st.  Out at the airport, their highest reading was actually 100 degrees seen on the 6th and again on the 19th.  The low out there was 51 degrees on the 1st.

On average Denver receives 2.16 inches of precipitation during July.  Both Thornton and Denver fell far short of that mark.  We managed to record 0.61 inches in our bucket during the month, more than half of which fell on the second to last day of the month. At DIA, Denver recorded 0.47 inches.

Click here to view Thornton’s July 2017 climate report.

Thornton, Colorado's July 2017 temperature summary. (ThorntonWeather.com)

Thornton, Colorado’s July 2017 temperature summary. (ThorntonWeather.com)

Thornton, Colorado's July 2017 precipitation summary. (ThorntonWeather.com)

Thornton, Colorado’s July 2017 precipitation summary. (ThorntonWeather.com)

From the National Weather Service:

656 AM MDT TUE AUG 1 2017




                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
 HIGH             105   07/20/2005
 LOW               42   07/04/1903
HIGHEST           100   07/19        99      -5      102  07/10
LOWEST             51   07/01        51       9       51  07/12
AVG. MAXIMUM     91.5              89.4     2.1     92.0
AVG. MINIMUM     61.3              58.9     2.4     60.5
MEAN             76.4              74.2     2.2     76.2
DAYS MAX >= 90     20              16.0     4.0       22
DAYS MAX <= 32      0               0.0     0.0        0
DAYS MIN <= 32      0               0.0     0.0        0
DAYS MIN <= 0 0 0.0 0.0 0 
 MAXIMUM 6.41 1965
 MINIMUM 0.01 1901 
TOTALS 0.47 2.16 -1.69 1.07 
DAILY AVG. 0.02 0.07 -0.05 0.03 
DAYS >= .01         6               8.3    -2.3        6
DAYS >= .10         3               4.3    -1.3        4
DAYS >= .50         0               1.4    -1.4        1
DAYS >= 1.00        0               0.7    -0.7        0
 24 HR. TOTAL    0.15   07/21 TO 07/21           07/01 TO 07/01
                                                          06/30 TO 07/01
                                                          07/01 TO 07/01

 TOTALS            0.0 2017         0.0

HEATING TOTAL       0                 6      -6        0
 SINCE 7/1          0                 6      -6        0
COOLING TOTAL     360               289      71      356
 SINCE 1/1        533               444      89      544

 EARLIEST     09/08/1962
 LATEST       06/08/2007
EARLIEST                        10/07
LATEST                          05/05

AVERAGE WIND SPEED              9.6

AVERAGE SKY COVER           0.50
NUMBER OF DAYS FAIR            6
NUMBER OF DAYS PC             21


THUNDERSTORM              9     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       3
LIGHT RAIN                9     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                       3     FOG W/VIS <= 1/4 MILE      1
HAZE                      3

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Series of fronts to unsettle Thornton’s Wednesday weather

Wednesday, August 2nd, 2017 6:39am MST

Today will offer near normal temperatures again however by the latter half of the day we will see things start to change. One front will arrive around noon bringing chances for storms and a second, reinforcing front, arrives tonight keeping things stirred up and offering much cooler temperatures tomorrow.

We start out the day today with mostly sunny skies and calm conditions. Clouds will slowly increase by mid-morning leading to partly sunny skies in the afternoon.

The first front will bring chances for showers and thunderstorms beginning at noon and lasting through the evening and overnight hours. Winds will be gusty at times with the frontal passage. Temperatures should top out near the average for today’s date of 89 degrees.

Tonight, clouds remain as do chances for storms until midnight. Overnight lows will be in the upper 50s.

That second front that we mentioned will pull in cooler air and result in high temperatures tomorrow in the 70s.

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Thornton’s August weather preview: Forecasts indicate cooler, wetter weather

Tuesday, August 1st, 2017 10:44am MST

As summer vacations wind down and families prepare to send their kids back to school in August, Colorado weather also starts to settle down. The chances for severe weather decrease markedly during August and by the end of the month daytime temperatures are dropping quite a bit as well.

Find out more about what lies ahead with Thornton’s August weather here.

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Lots of sun, seasonal temps, dry conditions for Thornton’s Tuesday

Tuesday, August 1st, 2017 5:08am MST

A very nice looking summer day greets us as we begin the month of August. Temperatures today will be right near normal with a healthy dose of sun above.

We start the day with sunny skies and other than a few clouds in the afternoon, there will be little to interrupt the shining from above. Temperatures will climb steadily toward a high in the upper 80s, close to the average high for the date of 90 degrees. Moisture has decreased considerably so we can expect to remain dry.

Overnight tonight skies will be mostly clear with lows near the 60 degree mark.

Enjoy the weather and use our live weather gauges here.

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July 30 to August 5: This week in Denver weather history

Monday, July 31st, 2017 5:11am MST
This Week In Denver Weather History

July 31 to August 6: This Week in Denver Weather History

How does 42 degrees sound right about now? That mark is one of the highlights of this week in Denver weather history. It was the low temperature recorded twice in our past and the coldest July temperature on record. Many more notable events have also occurred.

From the National Weather Service:


In 2008…a streak of 24 consecutive days of 90 degrees shattered the previous record of 18 consecutive days established in 1901 and 1874. Ironically…no new single day record high temperatures were set in the month of July. In August however…a record of 104 degrees was set on the 1st…and another record of 103 degrees was set on the 2nd. In addition…a record low min of 70 degrees was set on August 2nd.


In 1987…a streak of 16 consecutive days of 90 degrees ranked 4th on the list of hot streaks. The record of 24 consecutive days was established in the summer of 2008.


In 1956…96 percent of the total precipitation for the month of July occurred over the last five days of the month. Heavy thunderstorms produced 4.00 inches of rainfall at Stapleton Airport. This amount of precipitation in 5 days or less had been exceeded only 3 times in previous record. The last time had been in December of 1913 as snow. Considerable property damage occurred across metro Denver from flooding.


In 1889…dense smoke from forest fires in the mountains obscured the sun over the city for three days.

In 1971…a vigorous cold front late on the 28th produced northeast wind gusts to 39 mph and record breaking cold temperatures on the 29th and 30th. The temperature dipped to 47 degrees on the 29th and 43 degrees on the 30th… Setting record minimums for the dates. Upslope cloudiness along with rain and fog early on the 29th helped set a record low maximum temperature of 58 degrees for the date.


In 1997…heavy rain caused flooding and flash flooding in central portions of Adams and Arapahoe counties. Two homes were extensively damaged when water flooded the basements and adjacent pasture area in Strasburg. Water 4 to 5 feet deep had pooled in the lower lying areas of the town. A portion of Quincy Road was closed in Arapahoe County when 4 feet of water covered the roadway. Rainfall totaled 3.06 inches at Denver International Airport…establishing a new record for 24-hour rainfall in July. The previous record was 2.42 inches set in 1965 on the 24th and 25th.


In 1879…lightning struck a brick kiln in north Denver. Three men were knocked senseless…but all recovered. Rainfall in the city was only 0.09 inch.

In 1881…a thunderstorm dumped heavy rain and hail on the city…causing street flooding and much damage. A heavy torrent of rain fell with 1.10 inches measured in just 20 minutes. Storm total rainfall was 1.60 inches. The rain turned streets into running streams. Wood street crossings were torn up and washed away. The storm caused great damage by flooding many cellars where goods were stored. The brick yards suffered severe damage when the heavy rainfall destroyed many unfired bricks.

In 1913…northeast winds were sustained to 41 mph with gusts to 48 mph.

In 1939…a thunderstorm produced 0.08 inch of rainfall. This was the only measurable precipitation of the month…making the month the second driest July on record.

In 1961…heavy rain and lightning disrupted power lines and caused flooding in Denver. Thunderstorm rains totaled 1.60 inches at 11th and Lincoln in central Denver.

In 1972…the temperature climbed to a high of 100 degrees at Stapleton International Airport.

In 1983…hail 3/4 to 1 inch in diameter fell in central and southeast Denver and in Littleton. Rainfall of 1.50 inches occurred in just 30 minutes in Littleton. There was some street flooding in both cities with wind gusts up to 55 mph.

In 1984…central Aurora was hit by a downpour that produced 1.80 inches of rain and sent water 2 to 3 feet deep into some streets. Before the rain stopped later in the evening… The storm had dropped as much as 2.80 inches of moisture on the city. Thunderstorm rainfall totaled only 0.82 inch at Stapleton International Airport.

In 1985…a tornado was spotted in open country 10 miles southwest of Bennett. No damage was reported. One inch hail was reported in south Lakewood.

In 1997…one man was killed and his girlfriend critically injured when they were struck by lightning on the Kennedy Golf Course in southeast Denver. Both were struck in the head when they took refuge under a tree during a downpour. Lightning struck a home in unincorporated Arapahoe County east of Buckley Field. The fire started in the electrical panel boxes…causing extensive damage to the home. Heavy rain and hail triggered a flash flood in Boulder…which sent water through a window of the financial aid office on the University of Colorado campus. In addition…ceiling tiles…carpets…and dressing rooms were damaged at the Coors Events Center when a pipe draining rainwater broke during the downpour. In all…10 buildings on the campus received water damage estimated at 100 thousand dollars. Hail as large as 1.25 inches in diameter accompanied the heavy rain in Boulder. Thunderstorm rainfall totaled 2.71 inches at Denver International Airport where west winds gusted to 41 mph. This was the greatest calendar day official precipitation ever recorded in July.

In 1998…heavy rain…up to 3 inches in an hour…caused flash flooding problems from Castle Rock to Parker. I-25 north of Castle Rock was closed as high waters covered sections of the highway. Some cars were left floating in the flood waters.

In 2001…a severe thunderstorm produced a wind gust to 70 mph at a wind sensor on the northeast corner of Denver International Airport.

In 2004…a severe thunderstorm produced wind gusts to 71 mph in Evergreen.

In 2005…the temperature climbed to a high of 101 degrees at Denver International Airport. This was a new record maximum temperature for the date.

In addition…this was the 7th day of the month with a high temperature of 100 degrees or more…which set a new Denver record for the most 100 degree days in a month…for a season…and in a year.


In 1873…the all-time lowest recorded temperature in July… 42 degrees…occurred. The same temperature also occurred on July 4…1903.

In 1874…during the late afternoon rain and hail fell for 5 minutes followed by brief heavy rain. Pieces of solid ice of irregular shape fell upon the roof of the station. The hail stones measured 1 1/2 inches in diameter. Precipitation (rain and melted hail) was only 0.16 inch.

In 1889…the high temperature climbed to 100 degrees in downtown Denver.

In 1919…heavy thunderstorm rainfall totaled 2.59 inches in downtown Denver during the evening. Rainfall was 1.90 inches in an hour…a new record at that time.

In 1961…over an inch of rain in a short period of time caused flooding of streets and basements in Denver. Rainfall totaled 1.30 inches at 11th and Lincoln in central Denver.

In 1964…the temperature reached 91 degrees in Denver…making this the 27th day of the month that the temperature reached 90 degrees or more. This is the all time record for 90 degree days in a month in Denver.

In 1972…one inch diameter hail fell in Hudson northeast of Denver.

In 1976…during the evening hours extremely heavy thunderstorm rains produced flash flooding in Big Thompson Canyon which killed 144 people between Estes Park and Loveland. No significant weather occurred in metro Denver at the time.

In 1987…1 inch diameter hail fell in Lakewood and 3/4 inch hail fell near Louisville. Southeast Boulder County was drenched with 1.25 inches of rain in just 20 minutes.

In 1993…thunderstorm winds damaged a chimney of a home near Parker.

In 1996…a weak tornado (f0) was sighted 12 miles east of Denver International Airport. No damage was reported.

In 1998…heavy monsoonal thunderstorm rain triggered a mud slide in Blackhawk. The mudslide blocked Main St. and caused an estimated half million dollars in damage to a casino. Heavy thunderstorm rain…up to 3 inches in an hour…caused a flash flood along Buffalo Creek. Portions of County Road 126 just south of the town of Buffalo Creek were washed out. The flood waters nearly washed away the bridge as mud and debris slammed into the structure. Hail to 1 3/4 inches in diameter fell near Idaho Springs.

In 2004…severe thunderstorm winds toppled a 65-foot blue spruce tree in Parker. The tree landed on a home damaging the roof and gutters. The downed tree poked dozens of holes into the shingles.

In 2013…severe thunderstorm winds… with gusts estimated to 80 mph…downed power poles which caused scattered outages in and around Byers…Bennett and Strasburg. Some property damage was also observed. Near Byers…aluminum siding and roofing was peeled off sheds. Large hail…up to one inch in diameter… was reported north of Bennett. At Denver International Airport…a peak wind gust to 40 mph was observed from the northeast.

1 » Click here to read the rest of July 30 to August 5: This week in Denver weather history

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Thornton’s workweek starts out a bit cooler than normal, chance for isolated storms

Monday, July 31st, 2017 5:08am MST

Yesterday we finally we received our first, decent rainfall of the month. Today we see things dry out a good bit and temperatures remaining a bit below typical.

We start out the day with sunny skies then see a few clouds arrive by late morning. Temperatures will be warming up to a high in the mid-80s. There is a good bit less moisture to work with today but there may yet be a few, isolated thunderstorms in the afternoon.

Things will dry out this evening and we will see partly cloudy skies overnight with a low around 58 degrees.

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Cooler temperatures, better chances for storms for Thornton’s weekend

Friday, July 28th, 2017 5:26am MST

Monsoonal flow will continue to dominate our weather and after today, we stand a better chance to see precipitation. Temperatures will be near normal today but then get cooler Saturday and Sunday.

For Friday, we start out with sunny skies then will see clouds gradually increase in the afternoon. Temperatures will be topping out near the average for the date of 90 degrees. The afternoon brings some chances for storms, particularly in the late afternoon and early evening. Overnight tonight, a few showers may be seen as we head for a low in the mid-60s.

Saturday will see only partly sunny to mostly cloudy skies. Temperatures will be cooler with highs in the mid-80s. Some showers and thunderstorms will be possible throughout the day with good chances for activity coming in the afternoon and evening. Overnight Saturday into Sunday morning, some activity may persist. Overnight lows into Sunday morning will be in the low 60s.

We close out the weekend on Sunday with the coolest temperatures of the period. Highs will be around the 80 degree mark under mostly cloudy skies. Again, showers and thunderstorms will be possible for much of the day with the afternoon and evening bringing the best opportunity.

Let’s hope we can see some appreciable precipitation for once! Have a great weekend!

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