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: 19-May-2026 @ 3:40pm   (0 sec ago)
Temperature Current Conditions Forecast / Storm Prediction
Currently Outside: Warmer 1.1°F than last hour.

50.3°F

24-hr diff: 7.7°FWarmer 7.7°F than yesterday at this time.
Cool
High Today
51.6°F
3:27 PM
Low Today
35.9°F
6:18 AM
Yest High
45.1°F
12:58 AM
Yest Low
38.7°F
11:52 PM
Sta* High
91.0°F
2020
Sta* Low
32.2°F
2017
* This Station's Records Since 11/2006
Mostly cloudy, Dry Mostly cloudy, Dry

Wind from NW Wind:  NW
3.9

Gusting to:
6.0 mph
Current Rain Rain:
0.01 in
Chandler Burning Index: LOW Current CBI
Fire Danger:
6.8 of 100
This
Afternoon
This Afternoon: Chance Rain Showers
Chance Rain Showers
Tonight

Tonight: Rain Showers Likely
Rain Showers Likely
Wednesday

Wednesday: Slight Chance Rain Showers then Chance Showers And Thunderstorms
Slight Chance Rain Showers then Chance Showers And T-Storms
Hi 50°F Lo 41°F Hi 59°F
SPC Activity Map
Dew Point Liquid Precipitation Wind Speed Sun/Moon
Current: Decreased 0.2°F since last hour. 37.8°F
Last Hour: Decreased 0.2°F since last hour. -0.2°F
High 3:25 PM: 40.4°F
Low 8:50 AM: 32.3°F
Record High: 73.2°F on
3-Aug-2007
Record Low: -17.3°F on
16-Jan-2024
Wetbulb: 44.8°F
Rain Today
rain graph

Today: 0.01 in
Storm Rain: 0.69 in
Yesterday: 0.58 in
Last 7 Days: 0.68 in
May Rain: 1.60 in
May to Date
  Avg:10
2.10 in
May to Date
  Diff from Avg:10
Under 0.5 in for the month 0.50 in
May Avg: 2.98 in
Diff from Avg: Under 1.38 in for the month 1.38 in
Season:1 2.95 in
YTD
  Avg:11
5.76 in
YTD
  Diff from Avg:11
Under 2.81 in for the year 2.81 in
Last Rain
Time/Date:
19-May-2026
at 12:08 AM
22 rain days in 2026
7 days in May
0 days since last rain
Current: NW  3.9 mph
1Hr Average: 4.0 mph
Wind Run: 60.05 miles
Wind Gust
Current: 6.0 mph
Today: 14.0 mph 12:08 AM
Month: 41.1 mph 9-May
Year: 43.0 mph 25-Feb
Record Gust: 62.1 mph
17-Apr-2018
Sunlight:
14 h 29 m 9 s
of Sunlight Yesterday
14 h 30 m 51 s
of Sunlight Today
Which is
1 min 42 sec longer than
yesterday
14 h 32 m 32 s
of Sunlight Tomorrow
(Noon) graph (Midnight)
Legend

Waxing Crescent
Waxing Crescent, 3 days, 1 hours, 41 minutes in cycle
13%
Illuminated
Humidity Barometer
Current: Decreased 3% since last hour. 62%
Last Hour: Decreased 3% since last hour. 3%
High 12:00 AM: 89%
Low 3:31 PM: 60%
Record High: 100%
12-Feb-2007
Record Low: 0%
1-Jan-2008
Current: Falling 0.007  inHg/hr 30.029 inHg
Last Hour: Steady
High 7:33 AM: 30.116
Low 12:02 AM: 29.996
Record High: 31.086 inHg
30-Dec-2014
Record Low: 25.130 inHg
17-Dec-2006
Heating Degree Days Snow3 Wind Chill Air
Today: 16.9
May: 176.5
2026 to Date: 2359.5
Cooling Degree Days
2026 to Date: 57.8
Today: 0.00 in
Yesterday: 0.00 in
May Snow: Over 3.828 in for the month 5.60 in
May Avg: 1.77 in
Diff from Avg: 3.83 in
Season Total:2 28.00 in
Snow Depth: 0.00 in
2 snow days in May
13 snow days this season.2
First Snow of Season:
28-Nov-2025
Average 1st Snow:
29 of Oct
Current: 49.3°F
Low 6:13 AM: 29.5°F
Yesterday: 32.2°F
Record: -31.0°F
22-Dec-2022
Quality
Index6:

31


Good
Density:
1.25 kg/m3
Current UV Index Current Solar Energy9
2.2
Sunburn in
51 Minutes
Highest:
1:52 PM
6.4
334 W/m2
39%
W/m2 SI
High Today:
3:03 PM
953  W/m2
Record:
1461 W/m2
Almanac Irrigation Index5 Station All Time Records Cloud Level
Currently: Afternoon
YTD Avg Temp: 48.0°F
Sunrise: 5:41 am
Sunset: 8:10 pm
Moonrise: 8:02 am
Moonset: 11:00 pm
Full Moon: 31-May-2026
New Moon: 02:55 UTC
14-Jun-2026
Updated at Midnight
Current ET: 0.11 in
7-Days Rain: 0.68 in
7-Days ET: 1.50 in
7-Day:  0.816 in water in deficit of what evaporated in last 7 days. 0.816 in
May:  1.88 in water in deficit of what evaporated this month. 1.88 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:4.7 | 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 19 of just the month of May for this station since 2006.   11 Historical average rain this season to day 19 of May for this station since 2006.
 NWS Weather Forecast  -   Outlook This Afternoon & Tonight
This
Afternoon
This Afternoon: Chance Rain Showers
Chance Rain Showers

Hi 50°F
NWS forecast: A chance of rain showers. Cloudy, with a high near 50. North northeast wind around 6 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
Tonight

Tonight: Rain Showers Likely
Rain Showers Likely

Lo 41°F
NWS forecast: Rain showers likely. Cloudy. Low around 41, with temperatures rising to around 44 overnight. North northeast wind 2 to 6 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch possible.
 NWS Short Term Weather Forecast
Wednesday

Wednesday: Slight Chance Rain Showers then Chance Showers And Thunderstorms
Slight Chance Rain Showers 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: Partly Sunny then Showers And Thunderstorms Likely
Partly Sunny then Showers And T-Storms Likely
Thursday
Night
Thursday Night: Showers And Thunderstorms Likely
Showers And T-Storms Likely
Friday

Friday: Slight Chance Rain Showers then Chance Showers And Thunderstorms
Slight Chance Rain Showers then Chance Showers And T-Storms
Friday
Night
Friday Night: Slight Chance Showers And Thunderstorms then Mostly Cloudy
Slight Chance Showers And T-Storms then Mostly Cloudy
Saturday

Saturday: Mostly Sunny then Slight Chance Showers And Thunderstorms
Mostly Sunny then Slight Chance Showers And T-Storms
Hi 59°F Lo 43°F Hi 66°F Lo 43°F Hi 63°F Lo 43°F Hi 72°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