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Thornton, Colorado, USA
UpdatedSun, 18-Nov-2018 5:15am MST 
 

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Hotter temperatures, slight chance for storms for Thornton’s Wednesday

Wednesday, June 13th, 2018 5:03am MST

We enjoyed two days with slightly cooler mercury readings but today we once again expect to exceed the 90 degree mark. There will be a slight chance for afternoon and evening thunderstorms but most activity is expected east of us.

We start out the day under mostly sunny skies then will see some clearing in the morning followed by a more clouds in the afternoon and evening. Winds will be light, out of the west this morning, then the northeast in the afternoon.

Temperatures will be heading toward a high in the low 90s, about 10 degrees above normal for the date. After 3:00pm and into the evening we have a slight chance for some thunderstorm activity however, as we said above, most activity will likely not be in our area.

Tonight, partly clear skies will be above with lows dipping to around the 60 degree mark.

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Tuesday brings temps a bit warmer than normal, just a slight chance for storms

Tuesday, June 12th, 2018 5:15am MST

A day much like we had yesterday in terms of temperatures. We do expect to see a few more clouds though and perhaps an evening thunderstorm.

We start out under sunny skies then by mid-morning expect to see a few clouds but mostly sunny skies will be with us the balance of the day. Early on we may also see some haze from wildfires in southwestern Wyoming.

Temperatures start out comfortable this morning then begin a climb toward a high in the mid-80s. Most thunderstorm activity will be to our east and southeast but we can’t rule out a small possibility of an isolated, gusty storm in the evening.

Overnight tonight, partly cloudy skies will be above with lows dipping to the mid to upper 50s.

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Thornton’s workweek starts off with lots of sun, cooler temperatures

Monday, June 11th, 2018 4:55am MST

Finally, a little bit of a break from the heat of recent days. Temperatures will still be above normal but far closer to normal than they have been.

The day starts with sunny skies and with a lack of moisture to create clouds, things should remain clear through the day. Temperatures today will top out in the mid-80s, cooler but still above the average high for the date of 81 degrees.

Tonight, skies remain clear with lows dipping to the mid-40s.

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Denver ties record high temperature for June 9

Saturday, June 9th, 2018 6:00pm MST

Record High TemperaturesWe knew the weekend was going to be a scorcher and sure enough, it has been thus far.

Today, the high temperature in Denver as measured at Denver International Airport topped out at 95 degrees at 4:00pm. This tied the record high temperature for June 9 last set in 2012.

Here in Thornton we matched that number with a 95 degree high of our own as well.

This was the second record high temperature reading of the past week as on Tuesday we tied the record high for June 5.

More heat is expected on Sunday with highs potentially coming in a couple of degrees warmer than today. We then will see a weak cold front cool things down slightly Monday and Tuesday but then the heat returns for the latter half of the workweek.  See our extended forecast for details.

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Thornton’s weekend weather to offer up hot temperatures, dry conditions

Friday, June 8th, 2018 4:56am MST

Hot and dry will be the key weather words for the three day period. There will be little variation with temperatures far exceeding normal.

For Friday, we’ll see sunny skies this morning and then a few clouds in the afternoon and evening. Winds will be generally light. Temperatures today will top out in the mid-90s, well above the average high for the date of 80 degrees.

Saturday follows suit with a near clone of today’s weather. Expect to see similarly clear skies and unseasonably warm temperatures.

The weekend closes out with should be the hottest day of the period. Sunday will have a few more clouds but those aren’t expected to inhibit temperatures we expect a high around 98 degrees.

The record high temperature for today’s date is 98 degrees, for the 9th 95 degrees and the 10th 99 degrees. It would not be surprising to see one or two of those records fall. Have a great weekend and stay cool!

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The heat is on as temperatures climb for Thornton’s Thursday

Thursday, June 7th, 2018 5:06am MST

The heat is on as temperatures climb for Thornton’s Thursday. Ladies and gentlemen, start your air conditioners! Yesterday’s minimal break from the heat is over and today the mercury will once again climb, hitting the mid-90s.

The day starts out under mostly sunny skies and those will be with us through the morning. Then, this afternoon, cloud cover will increase leading to partly clear skies in the mid-afternoon through this evening.

At this time, it looks like we will remain dry with thunderstorm activity confined to areas northeast of us. Temperatures start out comfortable but will be on a steady climb with readings in the mid-90s expected for much of the afternoon.

Tonight, skies will be partly clear with lows in the mid to upper 50s.

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May 2018 weather recap: Warmer and drier than normal

Wednesday, June 6th, 2018 5:24pm MST

The month of May started off cool and damp but that did not last long.  It soon dried out and warmed up leading to one of the warmest Mays on record.

The first three days of the month brought cool temperatures and generous amounts of rain, more than one inch total.  We then followed that up with a warming trend that for a week.

Temperatures then cooled for the 12th and 13th of the month then started their upward trend again. Another, short break from the warmth came along from the 18th to the 20th.

After that, the warm weather returned and the last eleven days of the month all saw above normal mercury readings.

While there were a few days with rain after the wet start, none really amounted to much.

Thornton’s average temperature for the month came in at 60.5 degrees. By comparison, Denver’s long term average temperature for May is 57.1 degrees. Out at the airport where Denver’s official readings are taken, the month’s average temperature was warmer than ours at 61.4 degrees. That made the month the eight warmest May in Denver history.

Thornton saw its warmest temperature reading for the month of 92.4 degrees on the 26th of the month. The lowest reading of 35.4 degrees fell on the 4th.  Denver saw its warmest reading of 94 degrees on the same day we saw our warmest and its coldest of 40 degrees on the 20th.

Denver set a record high temperature on the 10th and tied the record high temperature for the 25th.  Additionally, the Mile High City saw four days with high temperatures at or above the 90 degree mark (Thornton had three). This breaks the record for the number of 90 degree days in May which previously was three days set in 1989 and 1874.

In terms of precipitation, Denver averages 2.12 inches during May.  Thornton fell well short with 1.59 inches in our bucket. The Mile High City fared better, but still below normal, with 1.86 inches.

No snow fell during the month in Thornton or Denver.

Click here to view Thornton’s May 2018 climate report.

Thornton, Colorado's May 2018 temperature summary. (ThorntonWeather.com)

Thornton, Colorado’s May 2018 temperature summary. (ThorntonWeather.com)

Thornton, Colorado's May 2018 precipitation summary. (ThorntonWeather.com)

Thornton, Colorado’s May 2018 precipitation summary. (ThorntonWeather.com)

CLIMATE REPORT
NATIONAL WEATHER SERVICE DENVER/BOULDER CO
942 AM MDT FRI JUN 1 2018

...................................

...THE DENVER CO CLIMATE SUMMARY FOR THE MONTH OF MAY 2018...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1872 TO 2018

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH              95   05/26/1942
 LOW               19   05/02/2013
                        05/03/1907
HIGHEST            94   05/26                         86  05/06
LOWEST             40   05/20                         32  05/04
                        05/03
                        05/02
AVG. MAXIMUM     75.4              71.5     3.9     69.6
AVG. MINIMUM     47.5              42.7     4.8     42.3
MEAN             61.4              57.1     4.3     55.9
DAYS MAX >= 90      4               0.8     3.2        0
DAYS MAX <= 32      0               0.0     0.0        0
DAYS MIN <= 32      0               1.9    -1.9        1
DAYS MIN <= 0       0               0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         8.57   1876
 MINIMUM         0.06   1974
TOTALS           1.86              2.12   -0.26     3.66
DAILY AVG.       0.06              0.07   -0.01     0.12
DAYS >= .01         8               9.4    -1.4       17
DAYS >= .10         5               4.8     0.2       11
DAYS >= .50         0               1.2    -1.2        2
DAYS >= 1.00        0               0.2    -0.2        1
GREATEST
 24 HR. TOTAL    0.49   05/03 TO 05/03           05/18 TO 05/18

SNOWFALL (INCHES)
TOTALS            0.0               1.1

DEGREE_DAYS
HEATING TOTAL     151               265    -114      281
 SINCE 7/1       5401              5996    -595     5084
COOLING TOTAL      46                21      25        6
 SINCE 1/1         48                22      26        6

FREEZE DATES
RECORD
 EARLIEST     09/08/1962
 LATEST       06/08/2007
EARLIEST                        10/07
LATEST                          05/05
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              9.9
RESULTANT WIND SPEED/DIRECTION   1/116
HIGHEST WIND SPEED/DIRECTION    36/330    DATE  05/30
HIGHEST GUST SPEED/DIRECTION    52/330    DATE  05/30

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.60
NUMBER OF DAYS FAIR            6
NUMBER OF DAYS PC             15
NUMBER OF DAYS CLOUDY         10

AVERAGE RH (PERCENT)     57

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORMS            11   MIXED PRECIP           3
HEAVY RAIN                2   RAIN                   2
LIGHT RAIN               11   FREEZING RAIN          0
LT FREEZING RAIN          0   HAIL                   3
HEAVY SNOW                0   SNOW                   0
LIGHT SNOW                0   FOG W/VIS <=1/4 MILE   6
FOG                      10   HAZE                   3

-  INDICATES NEGATIVE NUMBERS.
R  INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T  INDICATES TRACE AMOUNT.
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Microburst winds cause damage in Thornton

Wednesday, June 6th, 2018 1:14pm MST

High winds

The evening of June 5 had been relatively calm after a record-tying high temperature. Some high-based thunderstorms then began to move through and created gusty winds.  For some residents, those winds turned damaging.

What appears to have been a microburst (or multiple microbursts), brought fences, broke tree branches and for one Thornton family, toppled a 40 year old tree.  Watch the video below for the story from CBS4.

The winds did appear confined to relatively small areas, hitting hard when they did.  At ThorntonWeather.com, we saw some gusty winds (39mph) but nothing that would cause the type of damage seen by others.

The National Weather Service did report a 54mph gust at Denver International Airport and a 66mph gust at Buckley Air National Guard Base.

Did you suffer damage?  If you have pics, we’d love to see them!

 

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Weak cold front to provide a slight break from the heat Wednesday

Wednesday, June 6th, 2018 5:04am MST

Following yesterday’s record-setting warmth, we get a bit of a respite today. Temperatures will cool but still be well above normal and we will have another chance for afternoon thunderstorms.

The day starts under sunny skies but then a few clouds will be around for the morning. By late morning / early afternoon look for cloud cover to increase as the cold front settles in. Around that same time, we will see breezy winds that will hang around till the evening.

Temperatures will warm steadily toward a high in the upper 80s. As for thunderstorms, we see slight chances from 3:00pm through the evening.

Tonight, skies will be partly clear with lows in the mid-50s.

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Denver ties record high temperature for June 5

Tuesday, June 5th, 2018 5:38pm MST

Record High TemperaturesThe recent heat is much more like we would expect to see toward the middle of July.  High pressure though keeps the cooler air at bay and today Denver tied the record high temperature for the date.

As measured at Denver International Airport, the Mile High City saw an official high of 95 degrees. That ties the record high last set in 1946.

Here in Thornton, we were actually warmer by a good measure, something that doesn’t happen often. We topped out at 98 degrees at 3:06pm.

We will see a little bit of a reprieve from the heat tomorrow as a cold front moves through.  Highs Wednesday should be in the upper 80s.  After that though, the heat returns with 90+ degrees forecasted each day through the weekend.

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