Navigation

External Links

ThorntonWeather.com on Twitter

ThorntonWeather.com on Facebook

Alerts


No alerts
No Warnings, Watches, or Advisories

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: 18-Apr-2025 @ 10:35am   (0 sec ago)
Temperature Current Conditions Forecast / Storm Prediction
Currently Outside: Warmer 0.2°F than last hour.

30.8°F

Wind Chill:  28.9°F
24-hr diff: -36.8°FColder 36.8°F than yesterday at this time.
Cold
High Today
31.4°F
12:01 AM 		Low Today
28.8°F
5:21 AM
Yest High
75.6°F
12:49 PM 		Yest Low
31.3°F
11:57 PM
Sta* High
81.3°F
2014 		Sta* Low
12.3°F
2013
* This Station's Records Since 11/2006
Cloudy, Snow fall Cloudy, Snow fall

Wind from E Wind:  E
2.4
Gusting to:
 2.0 mph
Current Snow Snow3:
0.00 in
Chandler Burning Index: LOW Current CBI
Fire Danger:
-2.0 of 100
Today

Today: Light Snow Likely
Light Snow Likely
Tonight

Tonight: Snow then Snow Showers Likely
Snow then Snow Showers Likely
Saturday

Saturday: Chance Snow Showers
Chance Snow Showers
Hi 34°F Lo 24°F Hi 44°F
SPC Activity Map
Dew Point Liquid Precipitation Wind Speed Sun/Moon
Current: No Change 27.9°F
Last Hour: No Change -0.0°F
High 10:10 AM: 29.0°F
Low 5:21 AM: 26.5°F
Record High: 73.2°F on
3-Aug-2007
Record Low: -17.3°F on
16-Jan-2024
Wetbulb: 29.8°F
Rain Today
rain graph
Melt Today: 0.02 in
Rate (/hr): 0.030 in
Storm Rain: 0.02 in
Yesterday: 0.00 in
Last 7 Days: 0.06 in
Apr Rain: 0.32 in
Apr to Date
  Avg:10 		0.91 in
Apr to Date
  Diff from Avg:10 		Under 0.59 in for the month 0.59 in
Apr Avg: 1.57 in
Diff from Avg: Under 1.25 in for the month 1.25 in
Season:1 2.29 in
YTD
  Avg:11 		3.17 in
YTD
  Diff from Avg:11 		Under 0.88 in for the year 0.88 in
21 rain days in 2025
7 days in April
0 days since last rain
Current: E  2.4 mph
1Hr Average: 3.4 mph
Wind Run: 30.15 miles
Wind Gust
Current: 2.0 mph
Today: 14.0 mph 1:29 AM
Month: 38.0 mph 9-Apr
Year: 47.2 mph 3-Mar
Record Gust: 62.1 mph
17-Apr-2018
Sunlight:
13 h 25 m 5 s
of Sunlight Yesterday
13 h 27 m 33 s
of Sunlight Today Which is
2 min 28 sec longer than
yesterday
13 h 30 m 1 s
of Sunlight Tomorrow
 (Noon) graph (Midnight)
 Legend

Waning Gibbous
Waning Gibbous, 20 days, 5 hours, 42 minutes in cycle
72%
Illuminated
Humidity Barometer
Current: Decreased 1% since last hour. 89%
Last Hour: Decreased 1% since last hour. 1%
High 3:00 AM: 92%
Low 12:00 AM: 87%
Record High: 100%
12-Feb-2007
Record Low: 0%
1-Jan-2008
Current: Rising 0.035 inHg/hr 29.788 inHg
Last Hour: Rising
High 10:32 AM: 29.789
Low 12:02 AM: 29.587
Record High: 31.086 inHg
30-Dec-2014
Record Low: 25.130 inHg
17-Dec-2006
Heating Degree Days Snow3 Wind Chill Air
Today: 15.2
Apr: 279.5
2025 to Date: 2960.7
Cooling Degree Days
2025 to Date: 3.5
Today: 0.00 in
Yesterday: 0.00 in
Apr Snow: Under 5.048 in for the month 0.70 in
Apr Avg: 5.75 in
Diff from Avg: -5.05 in
Season Total:2 34.40 in
Snow Depth: 0.00 in
2 snow days in April
18 snow days this season.2
First Snow of Season:
6-Nov-2024
Average 1st Snow:
27 of Oct
Current: 28.9°F
Low 1:30 AM: 21.9°F
Yesterday: 24.2°F
Record: -31.0°F
22-Dec-2022
Quality
Index6:
37

Good
Density:
1.29 kg/m3
Current UV Index Current Solar Energy9
1.5
Sunburn in
75 Minutes 		Highest:
10:13 AM
1.5
239 W/m2
29%
W/m2 ⇒ SI 		High Today:
10:09 AM
 262  W/m2
Record:
1461 W/m2
Almanac Irrigation Index5 Station All Time Records Cloud Level
Currently: Morning
YTD Avg Temp: 37.5°F
Sunrise: 6:16 am
Sunset: 7:40 pm
Moonrise: 12:45 am
Moonset: 9:25 am
Full Moon: 12-Apr-2025
New Moon: 19:32 UTC
27-Apr-2025
Updated at Midnight
Current ET: 0.03 in
7-Days Rain: 0.06 in
7-Days ET: 1.38 in
7-Day: 1.322 in water in deficit of what evaporated in last 7 days. 1.322 in
April: 2.28 in water in deficit of what evaporated this month. 2.28 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°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:5 | S3C2:1 | Ajax 3.xx
ISS:Ok | CON:4.8 | 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 18 of just the month of April for this station since 2007.   11 Historical average rain this season to day 18 of April for this station since 2007.
 NWS Weather Forecast  -   Outlook Today & Tonight
Today

Today: Light Snow Likely
Light Snow Likely

Hi 34°F 		NWS forecast: Snow likely. Cloudy. High near 34, with temperatures falling to around 32 in the afternoon. North northeast wind around 12 mph, with gusts as high as 18 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 3 inches possible.
 Tonight

Tonight: Snow then Snow Showers Likely
Snow then Snow Showers Likely

Lo 24°F 		NWS forecast: Snow before midnight, then snow showers likely. Cloudy. Low around 24, with temperatures rising to around 26 overnight. Northeast wind 2 to 9 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.
 NWS Short Term Weather Forecast
Saturday

Saturday: Chance Snow Showers
Chance Snow Showers
Saturday
Night
Saturday Night: Slight Chance Rain Showers then Partly Cloudy
Slight Chance Rain Showers then Partly Cloudy
Sunday

Sunday: Sunny
Sunny
Sunday
Night
Sunday Night: Mostly Clear
Mostly Clear
Monday

Monday: Mostly Sunny
Mostly Sunny
Monday
Night
Monday Night: Partly Cloudy
Partly Cloudy
Tuesday

Tuesday: Mostly Sunny then Slight Chance Rain Showers
Mostly Sunny then Slight Chance Rain Showers
Hi 44°F Lo 28°F Hi 62°F Lo 37°F Hi 72°F Lo 40°F Hi 70°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