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: 17-May-2025 @ 6:15am   (0 sec ago)
Temperature Current Conditions Forecast / Storm Prediction
Currently Outside: Colder 1.2°F than last hour.

50.7°F

24-hr diff: 10.3°FWarmer 10.3°F than yesterday at this time.
Cool
High Today
57.8°F
12:00 AM
Low Today
50.6°F
6:14 AM
Yest High
72.8°F
4:49 PM
Yest Low
40.1°F
6:00 AM
Sta* High
87.3°F
2024
Sta* Low
37.9°F
2016
* This Station's Records Since 11/2006
Cloudy, Dry Cloudy, Dry

Wind from WNW Wind:  WNW
2.6

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

Today: Partly Sunny then Slight Chance Showers And Thunderstorms
Partly Sunny then Slight Chance Showers And T-Storms
Tonight

Tonight: Slight Chance Showers And Thunderstorms then Mostly Cloudy
Slight Chance Showers And T-Storms then Mostly Cloudy
Sunday

Sunday: Mostly Cloudy then Chance Showers And Thunderstorms
Mostly Cloudy then Chance Showers And T-Storms
Hi 71°F Lo 46°F Hi 72°F
SPC Activity Map
Dew Point Liquid Precipitation Wind Speed Sun/Moon
Current: No Change 39.0°F
Last Hour: No Change -0.0°F
High 5:46 AM: 39.5°F
Low 12:00 AM: 36.0°F
Record High: 73.2°F on
3-Aug-2007
Record Low: -17.3°F on
16-Jan-2024
Wetbulb: 45.5°F
Rain Today
rain graph

Today: 0.00 in
Yesterday: 0.00 in
Last 7 Days: 0.24 in
May Rain: 1.79 in
May to Date
  Avg:10
1.78 in
May to Date
  Diff from Avg:10
Over 0.01 in for the month 0.01 in
May Avg: 2.98 in
Diff from Avg: Under 1.19 in for the month 1.19 in
Season:1 4.43 in
YTD
  Avg:11
5.56 in
YTD
  Diff from Avg:11
Under 1.13 in for the year 1.13 in
Last Rain
Time/Date:
14-May-2025
at 6:12 PM
28 rain days in 2025
4 days in May
2 days since last rain
Current: WNW  2.6 mph
1Hr Average: 1.4 mph
Wind Run: 2.36 miles
Wind Gust
Current: 2.0 mph
Today: 6.0 mph 5:10 AM
Month: 40.0 mph 14-May
Year: 47.2 mph 3-Mar
Record Gust: 62.1 mph
17-Apr-2018
Sunlight:
14 h 28 m 57 s
of Sunlight Yesterday
14 h 30 m 44 s
of Sunlight Today
Which is
1 min 47 sec longer than
yesterday
14 h 32 m 29 s
of Sunlight Tomorrow
(Noon) graph (Midnight)
Legend

Waning Gibbous
Waning Gibbous, 19 days, 16 hours, 49 minutes in cycle
78%
Illuminated
Humidity Barometer
Current: Increased 3% since last hour. 64%
Last Hour: Increased 3% since last hour. 3%
High 5:46 AM: 64%
Low 12:00 AM: 44%
Record High: 100%
12-Feb-2007
Record Low: 0%
1-Jan-2008
Current: Falling 0.006  inHg/hr 29.598 inHg
Last Hour: Steady
High 1:51 AM: 29.632
Low 6:08 AM: 29.598
Record High: 31.086 inHg
30-Dec-2014
Record Low: 25.130 inHg
17-Dec-2006
Heating Degree Days Snow3 Wind Chill Air
Today: 2.3
May: 127.9
2025 to Date: 3260.4
Cooling Degree Days
2025 to Date: 18.4
Today: 0.00 in
Yesterday: 0.00 in
May Snow: Under 1.575 in for the month 0.00 in
May Avg: 1.57 in
Diff from Avg: -1.57 in
Season Total:2 36.90 in
Snow Depth: 0.00 in
0 snow days in May
20 snow days this season.2
First Snow of Season:
6-Nov-2024
Average 1st Snow:
27 of Oct
Current: 50.7°F
Low 6:14 AM: 50.6°F
Yesterday: 37.8°F
Record: -31.0°F
22-Dec-2022
Quality
Index6:

36


Good
Density:
1.23 kg/m3
Current UV Index Current Solar Energy9
0.0
Sunburn in
720 Minutes
Highest:
12:00 AM
0.0
14 W/m2
18%
W/m2 SI
High Today:
6:06 AM
14  W/m2
Record:
1461 W/m2
Almanac Irrigation Index5 Station All Time Records Cloud Level
Currently: Morning
YTD Avg Temp: 41.2°F
Sunrise: 5:42 am
Sunset: 8:09 pm
Moonrise: 12:21 am
Moonset: 9:20 am
Full Moon: 12-May-2025
New Moon: 03:03 UTC
26-May-2025
Updated at Midnight
Current ET: 0.04 in
7-Days Rain: 0.24 in
7-Days ET: 1.72 in
7-Day:  1.48 in water in deficit of what evaporated in last 7 days. 1.48 in
May:  1.35 in water in deficit of what evaporated this month. 1.35 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:19 | 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 17 of just the month of May for this station since 2006.   11 Historical average rain this season to day 17 of May for this station since 2006.
 NWS Weather Forecast  -   Outlook Today & Tonight
Today

Today: Partly Sunny then Slight Chance Showers And Thunderstorms
Partly Sunny then Slight Chance Showers And T-Storms

Hi 71°F
NWS forecast: A slight chance of showers and thunderstorms after 3pm. Partly sunny. High near 71, with temperatures falling to around 68 in the afternoon. North wind 2 to 9 mph. Chance of precipitation is 20%.
Tonight

Tonight: Slight Chance Showers And Thunderstorms then Mostly Cloudy
Slight Chance Showers And T-Storms then Mostly Cloudy

Lo 46°F
NWS forecast: A slight chance of showers and thunderstorms before 8pm. Mostly cloudy, with a low around 46. Southeast wind 3 to 9 mph. Chance of precipitation is 20%.
 NWS Short Term Weather Forecast
Sunday

Sunday: Mostly Cloudy then Chance Showers And Thunderstorms
Mostly Cloudy then Chance Showers And T-Storms
Sunday
Night
Sunday Night: Chance Showers And Thunderstorms
Chance Showers And T-Storms
Monday

Monday: Partly Sunny then Chance Showers And Thunderstorms
Partly Sunny then Chance Showers And T-Storms
Monday
Night
Monday Night: Slight Chance Rain Showers then Mostly Cloudy
Slight Chance Rain Showers then Mostly Cloudy
Tuesday

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

Wednesday: Sunny
Sunny
Hi 72°F Lo 46°F Hi 65°F Lo 44°F Hi 69°F Lo 42°F Hi 76°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