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: 14-Nov-2025 @ 3:35pm   (0 sec ago)
Temperature Current Conditions Forecast / Storm Prediction
Currently Outside: Colder 1.1°F than last hour.

75.1°F

24-hr diff: 4.3°FWarmer 4.3°F than yesterday at this time.
Comfortable
High Today
77.6°F
1:28 PM
Low Today
38.1°F
5:02 AM
Yest High
75.8°F
1:42 PM
Yest Low
42.6°F
4:42 AM
Sta* High
74.6°F
2016
Sta* Low
3.2°F
2014
* This Station's Records Since 11/2006
Station Record High
Mostly cloudy, Dry Mostly cloudy, Dry

Calm Wind:  NW
0.0

Gusting to:
0.0 mph
Current Rain Rain:
0.00 in
Chandler Burning Index: EXTREME Current CBI
Fire Danger:
128.4 of 100
This
Afternoon
This Afternoon: Partly Sunny
Partly Sunny
Tonight

Tonight: Mostly Cloudy
Mostly Cloudy
Saturday

Saturday: Partly Sunny
Partly Sunny
Hi 74°F Lo 44°F Hi 70°F
SPC Activity Map
Dew Point Liquid Precipitation Wind Speed Sun/Moon
Current: Decreased 0.8°F since last hour. 22.6°F
Last Hour: Decreased 0.8°F since last hour. -0.8°F
High 10:00 AM: 30.7°F
Low 3:25 PM: 21.2°F
Record High: 73.2°F on
3-Aug-2007
Record Low: -17.3°F on
16-Jan-2024
Wetbulb: 53.3°F
Rain Today
rain graph

Today: 0.00 in
Yesterday: 0.00 in
Last 7 Days: 0.00 in
Nov Rain: 0.00 in
Nov to Date
  Avg:10
0.24 in
Nov to Date
  Diff from Avg:10
Under 0.24 in for the month 0.24 in
Nov Avg: 0.50 in
Diff from Avg: Under 0.5 in for the month 0.50 in
Season:1 11.61 in
YTD
  Avg:11
13.72 in
YTD
  Diff from Avg:11
Under 2.11 in for the year 2.11 in
Last Rain
Time/Date:
27-Oct-2025
at 5:54 PM
72 rain days in 2025
0 days in November
15 days since last rain
Current: NW  0.0 mph
1Hr Average: 5.5 mph
Wind Run: 61.14 miles
Wind Gust
Current: 0.0 mph
Today: 24.0 mph 9:10 AM
Month: 37.0 mph 6-Nov
Year: 47.2 mph 3-Mar
Record Gust: 62.1 mph
17-Apr-2018
Sunlight:
10 h 2 m 10 s
of Sunlight Yesterday
10 h 0 m 12 s
of Sunlight Today
Which is
1 min 58 sec shorter than
yesterday
9 h 58 m 15 s
of Sunlight Tomorrow
(Noon) graph (Midnight)
Legend

Waning Crescent
Waning Crescent, 24 days, 10 hours, 12 minutes in cycle
25%
Illuminated
Humidity Barometer
Current: No Change 14%
Last Hour: No Change 0%
High 5:02 AM: 58%
Low 1:35 PM: 13%
Record High: 100%
12-Feb-2007
Record Low: 0%
1-Jan-2008
Current: Falling 0.004  inHg/hr 29.550 inHg
Last Hour: Steady
High 7:47 AM: 29.700
Low 3:22 PM: 29.542
Record High: 31.086 inHg
30-Dec-2014
Record Low: 25.130 inHg
17-Dec-2006
Cooling Degree Days Snow3 Heat Index Air
Today: 0.0
Nov: 0.0
2025 to Date: 829.1
Heating Degree Days
2025 to Date: 4043.7
Today: 0.00 in
Yesterday: 0.00 in
Nov Snow: Under 5.748 in for the month 0.00 in
Nov Avg: 5.75 in
Diff from Avg: -5.75 in
Season Total:2 0.00 in
Snow Depth: 0.00 in
0 snow days in November
0 snow days this season.2
First Snow of Season:
7-Jan-2025
Average 1st Snow:
27 of Oct
Current: 75.5°F
High 1:28pm: 77.6°F
Yesterday: 75.8°F
Record: 102.9°F
8-Jul-2021
Quality
Index6:

58


Moderate
Density:
1.17 kg/m3
Current UV Index Current Solar Energy9
0.0
Sunburn in
720 Minutes
Highest:
11:18 AM
2.2
51 W/m2
41%
W/m2 SI
High Today:
11:22 AM
531  W/m2
Record:
1461 W/m2
Almanac Irrigation Index5 Station All Time Records Cloud Level
Currently: Afternoon
YTD Avg Temp: 54.9°F
Sunrise: 6:43 am
Sunset: 4:44 pm
Moonrise: 1:20 am
Moonset: 1:59 pm
Full Moon: 05-Nov-2025
New Moon: 06:48 UTC
19-Nov-2025
Updated at Midnight
Current ET: 0.10 in
7-Days Rain: 0.00 in
7-Days ET: 0.63 in
7-Day:  0.634 in water in deficit of what evaporated in last 7 days. 0.634 in
November:  1.13 in water in deficit of what evaporated this month. 1.13 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:3 | S3C2:1 | Ajax 3.xx
ISS:Station 1 Low | CON:4.8 | RCP:88%
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 14 of just the month of November for this station since 2006.   11 Historical average rain this season to day 14 of November for this station since 2006.
 NWS Weather Forecast  -   Outlook This Afternoon & Tonight
This
Afternoon
This Afternoon: Partly Sunny
Partly Sunny

Hi 74°F
NWS forecast: Partly sunny. High near 74, with temperatures falling to around 64 in the afternoon. West northwest wind 7 to 13 mph, with gusts as high as 21 mph.
Tonight

Tonight: Mostly Cloudy
Mostly Cloudy

Lo 44°F
NWS forecast: Mostly cloudy, with a low around 44. West southwest wind around 8 mph.
 NWS Short Term Weather Forecast
Saturday

Saturday: Partly Sunny
Partly Sunny
Saturday
Night
Saturday Night: Partly Cloudy
Partly Cloudy
Sunday

Sunday: Sunny then Chance Rain Showers
Sunny then Chance Rain Showers
Sunday
Night
Sunday Night: Chance Rain Showers
Chance Rain Showers
Monday

Monday: Slight Chance Rain Showers then Mostly Sunny
Slight Chance Rain Showers then Mostly Sunny
Monday
Night
Monday Night: Partly Cloudy
Partly Cloudy
Tuesday

Tuesday: Mostly Sunny
Mostly Sunny
Hi 70°F Lo 40°F Hi 68°F Lo 40°F Hi 61°F Lo 35°F Hi 58°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