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Thornton, Colorado Weather Forecast

Adams County 39.92°N, 104.94°W Pop. 141,464
Open in Local Wx

Today in Thornton: slight rain showers with a high near 59°F and a low around 43°F. Rain chance 61%. No day tops a 20% rain chance through Wednesday. Warming trend: highs climb from 59°F today to 74°F by Sunday.

Forecast updated 8:05 AM MDT, Oct 15

Active Weather Alerts

7-Day Forecast for Thornton

Today 10/15
Slight rain showers
59°/43°
61%
Fri 10/16
Clear sky
61°/34°
0%
Sat 10/17
Clear sky
78°/36°
0%
Sun 10/18
Mostly sunny
74°/45°
0%
Mon 10/19
Clear sky
74°/44°
1%
Tue 10/20
Mostly sunny
76°/46°
3%
Wed 10/21
Clear sky
76°/52°
8%
Hourly charts, 15-day outlook and more for Thornton in Local Wx →

Next 24 Hours

Now2 PM3 PM4 PM5 PM6 PM7 PM8 PM9 PM10 PM11 PMFri12 AM1 AM2 AM3 AM4 AM5 AM6 AM7 AM8 AM9 AM10 AM11 AM12 PM
SkyMostly sunnyClear skyClear skyClear skyClear skyClear skyClear skyClear skyClear skyClear skyClear skyClear skyClear skyClear skyClear skyClear skyClear skyClear skyClear skyClear skyClear skyClear skyClear skyClear sky
Temp57°59°59°59°58°53°50°48°46°44°43°42°40°39°38°36°35°34°34°36°41°45°49°53°
Rain1%0%0%0%0%0%0%0%0%0%0%0%0%0%0%0%0%0%0%0%0%0%0%0%
WindN 19N 18N 17NNE 16NNE 12NNE 6N 4NW 3N 3NNE 2NNE 3NE 4NNE 3NNE 3S 2S 3S 3S 3S 4SSE 5SSE 6SSE 6SSE 6SE 5

Growing Conditions

Growing degree days
3,569
since Apr 1, base 50°F
Rain, last 30 days
0.56 in
model analysis
Rain, year to date
10.44 in
since Jan 1
2-inch soil temperature
54°F
yesterday, daily average
Reference ET, last 7 days
1.08 in
FAO-56 grass reference
Through Oct 14. Season totals use model analysis for this point and update every morning. Soil, ET and spray tools for Thornton →

Current Stats & Observations

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NWS Forecast

About Thornton Weather

Thornton sits at about 5,210 feet above sea level in Adams County, Colorado. About 141,464 people live in the Thornton area. Official forecasts and warnings for the area come from the National Weather Service BOU office, and the nearest NEXRAD radar site is KFTG. The city is in USDA plant hardiness zone 6a, where the coldest winter night typically falls between -10 to -5°F. Over the past ten years the last spring freeze has come around Apr 25 and the first fall freeze around Oct 19.

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All Colorado forecasts (21) → All states → Interactive forecast tools →