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 @ 11:05pm   (0 sec ago)
Temperature Current Conditions Forecast / Storm Prediction
Currently Outside: Colder 0.4°F than last hour.

30.3°F

Wind Chill:  29.6°F
24-hr diff: -2.5°FColder 2.5°F than yesterday at this time.
Cold
High Today
34.2°F
2:24 PM
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
Night time, Dry, Overcast Night time, Dry, Overcast

Wind from S Wind:  S
1.8

Gusting to:
2.0 mph
Current Snow Snow3:
1.80 in
Chandler Burning Index: LOW Current CBI
Fire Danger:
-2.2 of 100
Tonight

Tonight: Snow Showers
Snow Showers
Saturday

Saturday: Chance Snow Showers
Chance Snow Showers
Saturday
Night
Saturday Night: Partly Cloudy
Partly Cloudy
Lo 27°F Hi 45°F Lo 28°F
SPC Activity Map
Dew Point Liquid Precipitation Wind Speed Sun/Moon
Current: Decreased 0.6°F since last hour. 28.0°F
Last Hour: Decreased 0.6°F since last hour. -0.6°F
High 1:32 PM: 30.8°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: 29.5°F
Rain Today
rain graph

Melt Today: 0.18 in
Storm Rain: 0.18 in
Yesterday: 0.00 in
Last 7 Days: 0.06 in
Apr Rain: 0.48 in
Apr to Date
  Avg:10
0.91 in
Apr to Date
  Diff from Avg:10
Under 0.43 in for the month 0.43 in
Apr Avg: 1.57 in
Diff from Avg: Under 1.09 in for the month 1.09 in
Season:1 2.45 in
YTD
  Avg:11
3.17 in
YTD
  Diff from Avg:11
Under 0.72 in for the year 0.72 in
Last Rain
Time/Date:
18-Apr-2025
at 7:23 PM
21 rain days in 2025
7 days in April
0 days since last rain
Current: S  1.8 mph
1Hr Average: 2.9 mph
Wind Run: 81.21 miles
Wind Gust
Current: 2.0 mph
Today: 15.0 mph 1:17 PM
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, 18 hours, 8 minutes in cycle
68%
Illuminated
Humidity Barometer
Current: Decreased 1% since last hour. 91%
Last Hour: Decreased 1% since last hour. 1%
High 9:40 PM: 93%
Low 2:30 PM: 82%
Record High: 100%
12-Feb-2007
Record Low: 0%
1-Jan-2008
Current: Falling 0.002  inHg/hr 30.083 inHg
Last Hour: Steady
High 10:15 PM: 30.099
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: 33.1
Apr: 297.4
2025 to Date: 2978.6
Cooling Degree Days
2025 to Date: 3.5
Today: 1.80 in
Yesterday: 0.00 in
Apr Snow: Under 3.248 in for the month 2.50 in
Apr Avg: 5.75 in
Diff from Avg: -3.25 in
Season Total:2 36.20 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: 29.6°F
Low 1:30 AM: 21.9°F
Yesterday: 24.2°F
Record: -31.0°F
22-Dec-2022
Quality
Index6:

N/A


No Data
Density:
1.30 kg/m3
UV Summary/Forecast Solar Summary
High Today:   3.7 @ 11:37 AM
Apr-19

6.2
Apr-20

6.1
Apr-21

6.5
High Today:  
541 W/m2 @ 11:38 AM
Sun Hours Today:
00:00
   This Month: 80:28 Hrs
Rise: 6:15 am  Set: 7:41 pm
Almanac Irrigation Index5 Station All Time Records Cloud Level
Currently: Evening
YTD Avg Temp: 37.4°F
Sunrise: 6:15 am
Sunset: 7:41 pm
Moonrise: 1:37 am
Moonset: 10:23 am
Full Moon: 12-Apr-2025
New Moon: 19:32 UTC
27-Apr-2025
Updated at Midnight
Current ET: 0.05 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:  2.12 in water in deficit of what evaporated this month. 2.12 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:4.8 | 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.   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 Tonight & Saturday
Tonight

Tonight: Snow Showers
Snow Showers

Lo 27°F
NWS forecast: Snow showers before 4am, then a chance of snow showers and patchy fog. Mostly cloudy, with a low around 27. North northeast wind 2 to 6 mph. Chance of precipitation is 80%. New snow accumulation of around one inch possible.
Saturday

Saturday: Chance Snow Showers
Chance Snow Showers

Hi 45°F
NWS forecast: A chance of snow showers and patchy fog before noon, then a slight chance of rain and snow showers. Mostly cloudy, with a high near 45. East southeast wind 2 to 9 mph. Chance of precipitation is 40%. New snow accumulation of less than half an inch possible.
 NWS Short Term Weather Forecast
Saturday
Night
Saturday Night: Partly Cloudy
Partly Cloudy
Sunday

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

Monday: Mostly Sunny
Mostly Sunny
Monday
Night
Monday Night: Mostly Clear
Mostly Clear
Tuesday

Tuesday: Sunny then Slight Chance Rain Showers
Sunny then Slight Chance Rain Showers
Tuesday
Night
Tuesday Night: Slight Chance Showers And Thunderstorms then Partly Cloudy
Slight Chance Showers And T-Storms then Partly Cloudy
Lo 28°F Hi 62°F Lo 36°F Hi 71°F Lo 40°F Hi 71°F Lo 41°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