Navigation

External Links

ThorntonWeather.com on Twitter

ThorntonWeather.com on Facebook

Alerts

Adams County
 Details for Adams County Special Weather Statement
 Thornton
 Details for Thornton Special Weather Statement
Special Weather Statement SPECIAL WEATHER STATEMENT - Adams County  - Thornton

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: 10-Jul-2025 @ 1:50pm   (0 sec ago)
Temperature Current Conditions Forecast / Storm Prediction
Currently Outside: Colder 10.5°F than last hour.

77.5°F

24-hr diff: -21.8°FColder 21.8°F than yesterday at this time.
Comfortable
High Today
91.6°F
11:49 AM 		Low Today
73.2°F
5:58 AM
Yest High
102.2°F
4:15 PM 		Yest Low
56.4°F
5:51 AM
Sta* High
100.4°F
2016 		Sta* Low
55.0°F
2019
* This Station's Records Since 11/2006
Cloudy, Stopped raining Cloudy, Stopped raining

Wind from NW Wind:  NW
1.6
Gusting to:
 4.0 mph
Current Rain Rain:
0.05 in
Chandler Burning Index: LOW Current CBI
Fire Danger:
14.6 of 100
Overnight

Overnight: Mostly Cloudy
Mostly Cloudy
Thursday

Thursday: Slight Chance Rain Showers then Chance Showers And Thunderstorms
Slight Chance Rain Showers then Chance Showers And T-Storms
Thursday
Night
Thursday Night: Mostly Clear
Mostly Clear
Lo 74.0°F Hi 95.0°F Lo 61.0°F
SPC Activity Map
Dew Point Liquid Precipitation Wind Speed Sun/Moon
Current: Increased 13.3°F since last hour. 60.1°F
Last Hour: Increased 13.3°F since last hour. -18.7°F
High 1:42 PM: 60.7°F
Low 12:00 AM: 37.8°F
Record High: 73.2°F
3-Aug-2007
Record Low: -17.3°F
16-Jan-2024
Wetbulb: 66.8°F
Rain Today
rain graph
Today: 0.05 in
Rate (/hr): 0.029 in
Storm Rain: 0.05 in
Yesterday: 0.00 in
Last 7 Days: 0.22 in
Jul Rain: 0.27 in
Jul to Date
  Avg:10 		0.66 in
Jul to Date
  Diff from Avg:10 		Under 0.39 in for the month 0.39 in
Jul Avg: 1.90 in
Diff from Avg: Under 1.63 in for the month 1.63 in
Season:1 8.08 in
YTD
  Avg:11 		8.88 in
YTD
  Diff from Avg:11 		Under 0.8 in for the year 0.80 in
48 rain days in 2025
3 days in July
0 days since last rain
Current: NW  1.6 mph
1Hr Average: 8.9 mph
Wind Run: 12.95 miles
Wind Gust
Current: 4.0 mph
Today: 27.0 mph 1:08 PM
Month: 33.0 mph 6-Jul
Year: 47.2 mph 3-Mar
Record Gust: 62.1 mph
17-Apr-2018
Sunlight:
14 h 50 m 18 s
of Sunlight Yesterday
14 h 49 m 12 s
of Sunlight Today Which is
1 min 6 sec shorter than
yesterday
14 h 48 m 4 s
of Sunlight Tomorrow
 (Noon) graph (Midnight)
 Legend

Full Moon
Full Moon, 15 days, 9 hours, 19 minutes in cycle
100%
Illuminated
Humidity Barometer
Current: Increased 31% since last hour. 55%
Last Hour: Increased 31% since last hour. 31%
High 1:36 PM: 57%
Low 11:48 AM: 21%
Record High: 100%
12-Feb-2007
Record Low: 0%
1-Jan-2008
Current: Rising 0.007 inHg/hr 29.348 inHg
Last Hour: Steady
High 1:42 AM: 29.437
Low 12:16 PM: 29.333
Record High: 31.09 inHg
30-Dec-2014
Record Low: 25.13 inHg
17-Dec-2006
Cooling Degree Days Snow3 Heat Index Air
Today: 6.9
Jul: 106.2
2025 to Date: 313.0
Heating Degree Days
2025 to Date: 3399.5
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:
7-Jan-2025
Average 1st Snow:
27 of Oct
Current: 79.0°F
High 11:53am: 88.7°F
Yesterday: 96.9°F
Record: 102.9°F
8-Jul-2021
Quality
Index6:
46

Good
Density:
1.15 kg/m3
Current UV Index Current Solar Energy9
1.3
Sunburn in
86 Minutes 		Highest:
12:36 PM
8.2
181 W/m2
18%
W/m2 ⇒ SI 		High Today:
12:36 PM
 1069  W/m2
Record:
1461 W/m2
Almanac Irrigation Index5 Station All Time Records Cloud Level
Currently: Afternoon
YTD Avg Temp: 48.8°F
Sunrise: 5:40 am
Sunset: 8:30 pm
Moonrise: 8:18 pm
Moonset: 5:04 am
Full Moon: 10-Jul-2025
New Moon: 19:12 UTC
24-Jul-2025
Updated at Midnight
Current ET: 0.26 in
7-Days Rain: 0.22 in
7-Days ET: 1.95 in
7-Day: 1.729 in water in deficit of what evaporated in last 7 days. 1.73 in
July: 2.3 in water in deficit of what evaporated this month. 2.30 in
Support this Site!
Your donation helps support this site
HIGHS: LOWS:
102.9°F
25-Jun-2012 		-14.6°F
2-Feb-2011
Daytime Records
  100.6°F
12-Jul-2024 		 -8.1°F
22-Dec-2022
Nitetime Records
 88.0°F
15-Aug-2012 		 -10.7°F
02-Feb-2011
ICN:5 | 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.   9 Solar Index represents either an absolute scale of solar energy (W/m²) using the station’s recorded maximum or a percentage of computed theoretical solar maximum using the station’s location and time of day. These indices differ most when the sun is low on the horizon. The current scale is shown, and will toggle if it or the icon is clicked.   10 Historical average only to day 10 of just the month of July for this station since 2006.   11 Historical average rain this season to day 10 of July for this station since 2006.
 NWS Weather Forecast  -   Outlook Overnight & Thursday
Overnight

Overnight: Mostly Cloudy
Mostly Cloudy

Lo 74.0°F 		NWS forecast: Mostly cloudy, with a low around 74. West southwest wind around 7 mph.
 Thursday

Thursday: Slight Chance Rain Showers then Chance Showers And Thunderstorms
Slight Chance Rain Showers then Chance Showers And T-Storms

Hi 95.0°F 		NWS forecast: A slight chance of rain showers between 10am and noon, then a chance of showers and thunderstorms. Partly sunny. High near 95, with temperatures falling to around 87 in the afternoon. North northwest wind 7 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 40%.
 NWS Short Term Weather Forecast
Thursday
Night
Thursday Night: Mostly Clear
Mostly Clear
Friday

Friday: Mostly Sunny then Chance Showers And Thunderstorms
Mostly Sunny then Chance Showers And T-Storms
Friday
Night
Friday Night: Showers And Thunderstorms Likely
Showers And T-Storms Likely
Saturday

Saturday: Partly Sunny then Chance Showers And Thunderstorms
Partly Sunny then Chance Showers And T-Storms
Saturday
Night
Saturday Night: Partly Cloudy
Partly Cloudy
Sunday

Sunday: Sunny
Sunny
Sunday
Night
Sunday Night: Partly Cloudy
Partly Cloudy
Lo 61.0°F Hi 89.0°F Lo 59.0°F Hi 84.0°F Lo 60.0°F Hi 93.0°F Lo 64.0°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