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: 23-Aug-2025 @ 4:00am   (0 sec ago)
Temperature Current Conditions Forecast / Storm Prediction
Currently Outside: Colder 0.9°F than last hour.

62.1°F

24-hr diff: -4.2°FColder 4.2°F than yesterday at this time.
Comfortable
High Today
66.1°F
12:16 AM
Low Today
62.0°F
3:57 AM
Yest High
79.4°F
1:01 PM
Yest Low
62.8°F
6:16 AM
Sta* High
97.9°F
2020
Sta* Low
47.9°F
2015
* This Station's Records Since 11/2006
Night time, Dry, Overcast Night time, Dry, Overcast

Wind from ESE Wind:  ESE
4.5

Gusting to:
6.0 mph
Current Rain Rain:
0.00 in
Chandler Burning Index: LOW Current CBI
Fire Danger:
-1.1 of 100
Tonight

Tonight: Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
Chance Showers And T-Storms then Showers And T-Storms Likely
Saturday

Saturday: Chance Showers And Thunderstorms
Chance Showers And T-Storms
Saturday
Night
Saturday Night: Chance Showers And Thunderstorms then Partly Cloudy
Chance Showers And T-Storms then Partly Cloudy
Lo 60°F Hi 77°F Lo 58°F
SPC Activity Map
Dew Point Liquid Precipitation Wind Speed Sun/Moon
Current: Increased 0.3°F since last hour. 59.1°F
Last Hour: Increased 0.3°F since last hour. +0.3°F
High 3:26 AM: 59.3°F
Low 1:38 AM: 57.6°F
Record High: 73.2°F on
3-Aug-2007
Record Low: -17.3°F on
16-Jan-2024
Wetbulb: 60.4°F
Rain Today
rain graph

Today: 0.00 in
Yesterday: 0.00 in
Last 7 Days: 0.00 in
Aug Rain: 0.09 in
Aug to Date
  Avg:10
1.05 in
Aug to Date
  Diff from Avg:10
Under 0.96 in for the month 0.96 in
Aug Avg: 1.10 in
Diff from Avg: Under 1.01 in for the month 1.01 in
Season:1 8.52 in
YTD
  Avg:11
11.10 in
YTD
  Diff from Avg:11
Under 2.58 in for the year 2.58 in
Last Rain
Time/Date:
10-Aug-2025
at 9:38 PM
55 rain days in 2025
2 days in August
13 days since last rain
Current: ESE  4.5 mph
1Hr Average: 3.7 mph
Wind Run: 12.55 miles
Wind Gust
Current: 6.0 mph
Today: 8.1 mph 3:12 AM
Month: 40.0 mph 14-Aug
Year: 47.2 mph 3-Mar
Record Gust: 62.1 mph
17-Apr-2018
Sunlight:
13 h 27 m 31 s
of Sunlight Yesterday
13 h 25 m 5 s
of Sunlight Today
Which is
2 min 26 sec shorter than
yesterday
13 h 22 m 39 s
of Sunlight Tomorrow
(Noon) graph (Midnight)
Legend

New Moon
New Moon, 0 days, 3 hours, 58 minutes in cycle
0%
Illuminated
Humidity Barometer
Current: Increased 4% since last hour. 90%
Last Hour: Increased 4% since last hour. 4%
High 3:49 AM: 90%
Low 12:24 AM: 76%
Record High: 100%
12-Feb-2007
Record Low: 0%
1-Jan-2008
Current: Rising 0.003  inHg/hr 29.861 inHg
Last Hour: Steady
High 2:49 AM: 29.865
Low 12:06 AM: 29.844
Record High: 31.086 inHg
30-Dec-2014
Record Low: 25.130 inHg
17-Dec-2006
Heating Degree Days Snow3 Wind Chill Air
Today: 0.0
Aug: 0.0
2025 to Date: 3399.5
Cooling Degree Days
2025 to Date: 747.9
Today: 0.00 in
Yesterday: 0.00 in
Aug Snow: No Change 0.00 in
Aug 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 August
0 snow days this season.2
First Snow of Season:
7-Jan-2025
Average 1st Snow:
27 of Oct
Current: 62.1°F
Low 3:57 AM: 62.0°F
Yesterday: 62.8°F
Record: -31.0°F
22-Dec-2022
Quality
Index6:

53


Moderate
Density:
1.21 kg/m3
UV Summary/Forecast Solar Summary
High Yest:   7.5 @ 12:44 PM
Aug-23

10.4
Aug-24

9.4
Aug-25

9.4
High Yest:   965.0 @ 11:54 AM
Sun Hours Today:
00:00
   This Month: 166:31 Hrs
Rise: 6:19 am  Set: 7:45 pm
Almanac Irrigation Index5 Station All Time Records Cloud Level
Currently: Early Morning
YTD Avg Temp: 53.7°F
Sunrise: 6:19 am
Sunset: 7:45 pm
Moonrise: 6:37 am
Moonset: 7:38 pm
Full Moon: 07-Sep-2025
New Moon: 19:55 UTC
21-Sep-2025
Updated at Midnight
Current ET: 0.02 in
7-Days Rain: 0.00 in
7-Days ET: 1.51 in
7-Day:  1.508 in water in deficit of what evaporated in last 7 days. 1.508 in
August:  4.98 in water in deficit of what evaporated this month. 4.98 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: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 23 of just the month of August for this station since 2006.   11 Historical average rain this season to day 23 of August for this station since 2006.
 NWS Weather Forecast  -   Outlook Tonight & Saturday
Tonight

Tonight: Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
Chance Showers And T-Storms then Showers And T-Storms Likely

Lo 60°F
NWS forecast: A chance of showers and thunderstorms before 9pm, then showers and thunderstorms likely. Mostly cloudy, with a low around 60. South southeast wind around 6 mph. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.
Saturday

Saturday: Chance Showers And Thunderstorms
Chance Showers And T-Storms

Hi 77°F
NWS forecast: A chance of rain showers before 9am, then a chance of showers and thunderstorms between 9am and noon, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 77. East northeast wind 5 to 8 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
 NWS Short Term Weather Forecast
Saturday
Night
Saturday Night: Chance Showers And Thunderstorms then Partly Cloudy
Chance Showers And T-Storms then Partly Cloudy
Sunday

Sunday: Partly Sunny then Showers And Thunderstorms Likely
Partly Sunny then Showers And T-Storms Likely
Sunday
Night
Sunday Night: Showers And Thunderstorms Likely
Showers And T-Storms Likely
Monday

Monday: Showers And Thunderstorms
Showers And T-Storms
Monday
Night
Monday Night: Showers And Thunderstorms Likely
Showers And T-Storms Likely
Tuesday

Tuesday: Chance Rain Showers then Chance Showers And Thunderstorms
Chance Rain Showers 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
Lo 58°F Hi 80°F Lo 59°F Hi 72°F Lo 58°F Hi 74°F Lo 57°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