Navigation

External Links

ThorntonWeather.com on Twitter

ThorntonWeather.com on Facebook

Alerts


No alerts
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: 29-Sep-2026 @ 4:50am   (0 sec ago)
Temperature Current Conditions Forecast / Storm Prediction
Currently Outside: Colder 1.1°F than last hour.

56.0°F

24-hr diff: -4.8°FColder 4.8°F than yesterday at this time.
Cool
High Today
62.3°F
12:00 AM 		Low Today
55.8°F
4:43 AM
Yest High
73.3°F
3:11 PM 		Yest Low
58.7°F
3:24 AM
Sta* High
92.3°F
2024 		Sta* Low
35.3°F
2018
* This Station's Records Since 11/2006
Night time, Dry, Mostly cloudy Night time, Dry, Mostly cloudy

Calm Wind:  WSW
0.0
Gusting to:
 0.0 mph
Current Rain Rain:
0.00 in
Chandler Burning Index: LOW Current CBI
Fire Danger:
0.7 of 100
Overnight

Overnight: Chance Rain Showers
Chance Rain Showers
Tuesday

Tuesday: Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms
Slight Chance Rain Showers then Slight Chance Showers And T-Storms
Tuesday
Night
Tuesday Night: Rain Showers Likely
Rain Showers Likely
Lo 57°F Hi 69°F Lo 55°F
SPC Activity Map
Dew Point Liquid Precipitation Wind Speed Sun/Moon
Current: No Change 49.2°F
Last Hour: No Change -0.0°F
High 1:47 AM: 50.2°F
Low 4:43 AM: 48.7°F
Record High: 73.2°F on
3-Aug-2007
Record Low: -17.3°F on
16-Jan-2024
Wetbulb: 52.5°F
Rain Today
rain graph
Today: 0.00 in
Yesterday: 0.00 in
Last 7 Days: 0.08 in
Sep Rain: 0.68 in
Sep to Date
  Avg:10 		1.49 in
Sep to Date
  Diff from Avg:10 		Under 0.81 in for the month 0.81 in
Sep Avg: 1.48 in
Diff from Avg: Under 0.8 in for the month 0.80 in
Season:1 6.68 in
YTD
  Avg:11 		12.36 in
YTD
  Diff from Avg:11 		Under 5.68 in for the year 5.68 in
Last Rain
Time/Date: 		25-Sep-2026
at 11:23 PM
57 rain days in 2026
8 days in September
3 days since last rain
Current: WSW  0.0 mph
1Hr Average: 0.2 mph
Wind Run: 8.93 miles
Wind Gust
Current: 0.0 mph
Today: 11.5 mph 12:36 AM
Month: 39.0 mph 6-Sep
Year: 43.0 mph 25-Feb
Record Gust: 62.1 mph
17-Apr-2018
Sunlight:
11 h 53 m 47 s
of Sunlight Yesterday
11 h 51 m 11 s
of Sunlight Today Which is
2 min 36 sec shorter than
yesterday
11 h 48 m 35 s
of Sunlight Tomorrow
 (Noon) graph (Midnight)
 Legend

Waning Gibbous
Waning Gibbous, 18 days, 7 hours, 23 minutes in cycle
90%
Illuminated
Humidity Barometer
Current: Increased 3% since last hour. 78%
Last Hour: Increased 3% since last hour. 3%
High 4:43 AM: 78%
Low 12:00 AM: 63%
Record High: 100%
12-Feb-2007
Record Low: 0%
1-Jan-2008
Current: Falling 0.014 inHg/hr 29.439 inHg
Last Hour: Steady
High 2:20 AM: 29.459
Low 1:27 AM: 29.432
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
Sep: 11.8
2026 to Date: 2428.2
Cooling Degree Days
2026 to Date: 1119.9
Today: 0.00 in
Yesterday: 0.00 in
Sep Snow: Under 0.118 in for the month 0.00 in
Sep Avg: 0.12 in
Diff from Avg: -0.12 in
Season Total:2 0.00 in
Snow Depth: 0.00 in
0 snow days in September
0 snow days this season.2
First Snow of Season:
8-Jan-2026
Average 1st Snow:
29 of Oct
Current: 56.0°F
Low 4:43 AM: 55.8°F
Yesterday: 58.7°F
Record: -31.0°F
22-Dec-2022
Quality
Index6:
38

Good
Density:
1.21 kg/m3
UV Summary/Forecast Solar Summary
High Yest:   4.7 @ 2:23 PM
Sep-29

6.2 		Sep-30

6.4 		Oct-01

6.2
High Yest:   640.0 @ 2:36 PM
Sun Hours Today:
00:00
   This Month: 194:07 Hrs
Rise: 6:54 am  Set: 6:46 pm
Almanac Irrigation Index5 Station All Time Records Cloud Level
Currently: Early Morning
YTD Avg Temp: 60.0°F
Sunrise: 6:54 am
Sunset: 6:46 pm
Moonrise: 7:40 pm
Moonset: 10:20 am
Full Moon: 26-Sep-2026
New Moon: 15:51 UTC
10-Oct-2026
Updated at Midnight
Current ET: 0.02 in
7-Days Rain: 0.08 in
7-Days ET: 0.95 in
7-Day: 0.869 in water in deficit of what evaporated in last 7 days. 0.869 in
September: 4.06 in water in deficit of what evaporated this month. 4.06 in
Support this Site!
Your donation helps support this site
HIGHS: LOWS:
104.4°F
25-Jul-2026 		-14.6°F
2-Feb-2011
Daytime Records
  100.8°F°F
02-Aug-2026 		  -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 29 of just the month of September for this station since 2006.   11 Historical average rain this season to day 29 of September for this station since 2006.
 NWS Weather Forecast  -   Outlook Overnight & Tuesday
Overnight

Overnight: Chance Rain Showers
Chance Rain Showers

Lo 57°F 		NWS forecast: A chance of rain showers. Cloudy, with a low around 57. North northwest wind around 5 mph. Chance of precipitation is 30%.
 Tuesday

Tuesday: Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms
Slight Chance Rain Showers then Slight Chance Showers And T-Storms

Hi 69°F 		NWS forecast: A slight chance of rain showers before 3pm, then a slight chance of showers and thunderstorms. Cloudy, with a high near 69. North northwest wind around 7 mph. Chance of precipitation is 20%.
 NWS Short Term Weather Forecast
Tuesday
Night
Tuesday Night: Rain Showers Likely
Rain Showers Likely
Wednesday

Wednesday: Rain Showers Likely
Rain Showers Likely
Wednesday
Night
Wednesday Night: Rain Showers Likely
Rain Showers Likely
Thursday

Thursday: Chance Rain Showers then Partly Sunny
Chance Rain Showers then Partly Sunny
Thursday
Night
Thursday Night: Mostly Clear
Mostly Clear
Friday

Friday: Sunny
Sunny
Friday
Night
Friday Night: Mostly Clear
Mostly Clear
Lo 55°F Hi 64°F Lo 51°F Hi 64°F Lo 45°F Hi 74°F Lo 49°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