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-Jun-2025 @ 5:55pm   (0 sec ago)
Temperature Current Conditions Forecast / Storm Prediction
Currently Outside: Colder 0.9°F than last hour.

59.0°F

24-hr diff: -29.1°FColder 29.1°F than yesterday at this time.
Cool
High Today
69.4°F
1:05 PM
Low Today
51.4°F
2:34 PM
Yest High
92.4°F
2:37 PM
Yest Low
56.5°F
5:58 AM
Sta* High
102.0°F
2021
Sta* Low
48.2°F
2014
* This Station's Records Since 11/2006
Sunny, Dry Sunny, Dry

Wind from N Wind:  N
6.5

Gusting to:
4.0 mph
Current Rain Rain:
0.42 in
Chandler Burning Index: LOW Current CBI
Fire Danger:
2.0 of 100
This
Afternoon
This Afternoon: Showers And Thunderstorms Likely
Showers And T-Storms Likely
Tonight

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

Wednesday: Sunny
Sunny
Hi 71°F Lo 53°F Hi 83°F
SPC Activity Map
Dew Point Liquid Precipitation Wind Speed Sun/Moon
Current: Decreased 0.3°F since last hour. 50.7°F
Last Hour: Decreased 0.3°F since last hour. -0.3°F
High 1:03 PM: 60.8°F
Low 2:30 PM: 46.9°F
Record High: 73.2°F on
3-Aug-2007
Record Low: -17.3°F on
16-Jan-2024
Wetbulb: 54.6°F
Rain Today
rain graph

Today: 0.42 in
Storm Rain: 0.42 in
Yesterday: 0.00 in
Last 7 Days: 0.00 in
Jun Rain: 1.55 in
Jun to Date
  Avg:10
1.02 in
Jun to Date
  Diff from Avg:10
Over 0.53 in for the month 0.53 in
Jun Avg: 1.43 in
Diff from Avg: Over 0.12 in for the month 0.12 in
Season:1 7.25 in
YTD
  Avg:11
7.78 in
YTD
  Diff from Avg:11
Under 0.53 in for the year 0.53 in
Last Rain
Time/Date:
17-Jun-2025
at 2:27 PM
41 rain days in 2025
6 days in June
0 days since last rain
Current: N  6.5 mph
1Hr Average: 3.5 mph
Wind Run: 43.11 miles
Wind Gust
Current: 4.0 mph
Today: 26.5 mph 12:03 PM
Month: 34.0 mph 11-Jun
Year: 47.2 mph 3-Mar
Record Gust: 62.1 mph
17-Apr-2018
Sunlight:
14 h 59 m 54 s
of Sunlight Yesterday
15 h 0 m 8 s
of Sunlight Today
Which is 14 sec longer than
yesterday
15 h 0 m 18 s
of Sunlight Tomorrow
(Noon) graph (Midnight)
Legend

Waning Gibbous
Waning Gibbous, 21 days, 20 hours, 54 minutes in cycle
58%
Illuminated
Humidity Barometer
Current: Increased 2% since last hour. 74%
Last Hour: Increased 2% since last hour. 2%
High 5:54 AM: 93%
Low 1:04 AM: 55%
Record High: 100%
12-Feb-2007
Record Low: 0%
1-Jan-2008
Current: Rising 0.075  inHg/hr 29.690 inHg
Last Hour: Rising
High 5:54 PM: 29.691
Low 12:34 AM: 29.371
Record High: 31.086 inHg
30-Dec-2014
Record Low: 25.130 inHg
17-Dec-2006
Heating Degree Days Snow3 Wind Chill Air
Today: 0.7
Jun: 38.5
2025 to Date: 3394.8
Cooling Degree Days
2025 to Date: 92.4
Today: 0.00 in
Yesterday: 0.00 in
Jun Snow: No Change 0.00 in
Jun Avg: 0.00 in
Diff from Avg: 0.00 in
Season Total:2 36.90 in
Snow Depth: 0.00 in
0 snow days in June
20 snow days this season.2
First Snow of Season:
6-Nov-2024
Average 1st Snow:
27 of Oct
Current: 58.2°F
Low 2:34 PM: 51.4°F
Yesterday: 56.5°F
Record: -31.0°F
22-Dec-2022
Quality
Index6:

45


Good
Density:
1.21 kg/m3
Current UV Index Current Solar Energy9
1.6
Sunburn in
70 Minutes
Highest:
12:47 PM
8.9
408 W/m2
84%
W/m2 SI
High Today:
4:29 PM
795  W/m2
Record:
1461 W/m2
Almanac Irrigation Index5 Station All Time Records Cloud Level
Currently: Afternoon
YTD Avg Temp: 45.3°F
Sunrise: 5:30 am
Sunset: 8:30 pm
Moonrise: 12:30 am
Moonset: 11:46 am
Full Moon: 11-Jun-2025
New Moon: 10:32 UTC
25-Jun-2025
Updated at Midnight
Current ET: 0.08 in
7-Days Rain: 0.00 in
7-Days ET: 1.90 in
7-Day:  1.898 in water in deficit of what evaporated in last 7 days. 1.898 in
June:  1.93 in water in deficit of what evaporated this month. 1.93 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:0 | 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 June for this station since 2006.   11 Historical average rain this season to day 17 of June for this station since 2006.
 NWS Weather Forecast  -   Outlook This Afternoon & Tonight
This
Afternoon
This Afternoon: Showers And Thunderstorms Likely
Showers And T-Storms Likely

Hi 71°F
NWS forecast: Showers and thunderstorms likely. Some of the storms could be severe. Mostly cloudy. High near 71, with temperatures falling to around 64 in the afternoon. North northeast wind 9 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch possible.
Tonight

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

Lo 53°F
NWS forecast: A slight chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 53. Northwest wind 2 to 9 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
 NWS Short Term Weather Forecast
Wednesday

Wednesday: Sunny
Sunny
Wednesday
Night
Wednesday Night: Mostly Clear
Mostly Clear
Juneteenth

Juneteenth: Sunny
Sunny
Thursday
Night
Thursday Night: Mostly Clear
Mostly Clear
Friday

Friday: Sunny
Sunny
Friday
Night
Friday Night: Mostly Clear
Mostly Clear
Saturday

Saturday: Sunny
Sunny
Hi 83°F Lo 59°F Hi 96°F Lo 65°F Hi 101°F Lo 66°F Hi 100°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