Air Quality Alert AIR QUALITY ALERT - Adams County

Current Radar
Thornton, Colorado current radar
Click for larger view
Current Webcam
Thornton, Colorado current webcam image
Click for larger view
Latest News
powered by Surfing Waves
spacer
METRIC | IMPERIAL
Updated: 27-Jul-2026 @ 3:55am   (0 sec ago)
Temperature Current Conditions Forecast / Storm Prediction
Currently Outside: Colder 2.7°F than last hour.

77.5°F

24-hr diff: 4.6°FWarmer 4.6°F than yesterday at this time.
Comfortable
High Today
84.2°F
12:00 AM
Low Today
77.5°F
3:53 AM
Yest High
104.0°F
2:22 PM
Yest Low
68.5°F
6:14 AM
Sta* High
99.5°F
2025
Sta* Low
52.6°F
2013
* This Station's Records Since 11/2006
Night time, Dry, Mostly cloudy Night time, Dry, Mostly cloudy

Wind from W Wind:  W
1.6

Gusting to:
2.0 mph
Current Rain Rain:
0.00 in
Chandler Burning Index: LOW Current CBI
Fire Danger:
29.9 of 100
Overnight

Overnight: Slight Chance Rain Showers
Slight Chance Rain Showers
Monday

Monday: Partly Sunny then Chance Showers And Thunderstorms
Partly Sunny then Chance Showers And T-Storms
Monday
Night
Monday Night: Chance Showers And Thunderstorms then Mostly Cloudy
Chance Showers And T-Storms then Mostly Cloudy
Lo 72°F Hi 95°F Lo 67°F
SPC Activity Map
Dew Point Liquid Precipitation Wind Speed Sun/Moon
Current: Increased 0.4°F since last hour. 53.2°F
Last Hour: Increased 0.4°F since last hour. +0.4°F
High 2:23 AM: 55.2°F
Low 12:20 AM: 51.0°F
Record High: 73.2°F on
3-Aug-2007
Record Low: -17.3°F on
16-Jan-2024
Wetbulb: 63.5°F
Rain Today
rain graph

Today: 0.00 in
Yesterday: 0.00 in
Last 7 Days: 0.41 in
Jul Rain: 0.71 in
Jul to Date
  Avg:10
1.61 in
Jul to Date
  Diff from Avg:10
Under 0.9 in for the month 0.90 in
Jul Avg: 1.83 in
Diff from Avg: Under 1.12 in for the month 1.12 in
Season:1 5.38 in
YTD
  Avg:11
9.66 in
YTD
  Diff from Avg:11
Under 4.28 in for the year 4.28 in
Last Rain
Time/Date:
23-Jul-2026
at 7:58 PM
39 rain days in 2026
4 days in July
3 days since last rain
Current: W  1.6 mph
1Hr Average: 4.9 mph
Wind Run: 12.63 miles
Wind Gust
Current: 2.0 mph
Today: 12.0 mph 3:10 AM
Month: 35.0 mph 10-Jul
Year: 43.0 mph 25-Feb
Record Gust: 62.1 mph
17-Apr-2018
Sunlight:
14 h 26 m 3 s
of Sunlight Yesterday
14 h 24 m 16 s
of Sunlight Today
Which is
1 min 47 sec shorter than
yesterday
14 h 22 m 25 s
of Sunlight Tomorrow
(Noon) graph (Midnight)
Legend

Waxing Gibbous
Waxing Gibbous, 13 days, 0 hours, 13 minutes in cycle
96%
Illuminated
Humidity Barometer
Current: Increased 4% since last hour. 43%
Last Hour: Increased 4% since last hour. 4%
High 2:23 AM: 44%
Low 12:15 AM: 32%
Record High: 100%
12-Feb-2007
Record Low: 0%
1-Jan-2008
Current: Rising 0.013  inHg/hr 29.439 inHg
Last Hour: Steady
High 12:25 AM: 29.467
Low 2:43 AM: 29.418
Record High: 31.086 inHg
30-Dec-2014
Record Low: 25.130 inHg
17-Dec-2006
Cooling Degree Days Snow3 Heat Index Air
Today: 2.6
Jul: 359.8
2026 to Date: 610.3
Heating Degree Days
2026 to Date: 2415.6
Today: 0.00 in
Yesterday: 0.00 in
Jul Snow: No Change 0.00 in
Jul Avg: 0.00 in
Diff from Avg: 0.00 in
Season Total:2 0.00 in
Snow Depth: 0.00 in
0 snow days in July
0 snow days this season.2
First Snow of Season:
8-Jan-2026
Average 1st Snow:
29 of Oct
Current: 78.7°F
High 12:27am: 82.5°F
Yesterday: 103.4°F
Record: 103.5°F
26-Jul-2026
Quality
Index6:

64


Moderate
Density:
1.16 kg/m3
UV Summary/Forecast Solar Summary
High Yest:   9.3 @ 1:48 PM
Jul-27

11.1
Jul-28

10.3
Jul-29

10.1
High Yest:   1132.0 @ 2:18 PM
Sun Hours Today:
00:00
   This Month: 211:26 Hrs
Rise: 5:53 am  Set: 8:18 pm
Almanac Irrigation Index5 Station All Time Records Cloud Level
Currently: Night
YTD Avg Temp: 56.0°F
Sunrise: 5:53 am
Sunset: 8:18 pm
Moonrise: 6:55 pm
Moonset: 3:42 am
Full Moon: 29-Jul-2026
New Moon: 17:37 UTC
12-Aug-2026
Updated at Midnight
Current ET: 0.13 in
7-Days Rain: 0.41 in
7-Days ET: 1.96 in
7-Day:  1.551 in water in deficit of what evaporated in last 7 days. 1.551 in
July:  7.12 in water in deficit of what evaporated this month. 7.12 in
Support this Site!
Your donation helps support this site
HIGHS: LOWS:
104.4°F
25-Jul-2026
-14.6°F
2-Feb-2011
Daytime Records
  100.6°F°F
12-Jul-2024
  -8.1°F°F
22-Dec-2022
Nitetime Records
  88.0°F°F
15-Aug-2012
  -10.7°F°F
02-Feb-2011
ICN:1 | S3C2:1 | Ajax 3.xx
ISS:Ok | CON:4.7 | RCP:99%
1 Rain season: Jan 1st to Dec 31st.   2 Snow season July 1st to June 30th.   3 Snow manually measured usually around 5AM and 5PM.   5 Estimated amount of water needed to replace the water used by plants and evaporation from the past week. (Negative numbers mean amount of water needed, positive numbers mean excess water is present).   6 Air Quality Index is provided by Colorado Department of Public Health & Environment.   10 Historical average only to day 27 of just the month of July for this station since 2006.   11 Historical average rain this season to day 27 of July for this station since 2006.
 NWS Weather Forecast  -   Outlook Overnight & Monday
Overnight

Overnight: Slight Chance Rain Showers
Slight Chance Rain Showers

Lo 72°F
NWS forecast: A slight chance of rain showers before 3am. Mostly cloudy. Low around 72, with temperatures rising to around 76 overnight. West northwest wind 5 to 8 mph. Chance of precipitation is 20%.
Monday

Monday: Partly Sunny then Chance Showers And Thunderstorms
Partly Sunny then Chance Showers And T-Storms

Hi 95°F
NWS forecast: A chance of showers and thunderstorms after noon. Partly sunny. High near 95, with temperatures falling to around 88 in the afternoon. North wind 3 to 9 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
 NWS Short Term Weather Forecast
Monday
Night
Monday Night: Chance Showers And Thunderstorms then Mostly Cloudy
Chance Showers And T-Storms then Mostly Cloudy
Tuesday

Tuesday: Mostly Sunny then Chance Showers And Thunderstorms
Mostly Sunny then Chance Showers And T-Storms
Tuesday
Night
Tuesday Night: Chance Showers And Thunderstorms then Mostly Cloudy
Chance Showers And T-Storms then Mostly Cloudy
Wednesday

Wednesday: Mostly Sunny then Chance Showers And Thunderstorms
Mostly Sunny then Chance Showers And T-Storms
Wednesday
Night
Wednesday Night: Chance Showers And Thunderstorms then Partly Cloudy
Chance Showers And T-Storms then Partly Cloudy
Thursday

Thursday: Sunny then Slight Chance Showers And Thunderstorms
Sunny then Slight Chance Showers And T-Storms
Thursday
Night
Thursday Night: Mostly Clear
Mostly Clear
Lo 67°F Hi 91°F Lo 65°F Hi 92°F Lo 64°F Hi 94°F Lo 65°F
Click here for the complete forecast.
ajax-dashboard6.php - Version 6.95h - 20-Feb-2023 - Script by: Scott of BurnsvilleWeatherLIVE.com
Now supported by Saratoga-weather.org Download