National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Broomfield / Jeffco (KBJC)

Lat: 39.9°NLon: 105.1°WElev: 5551ft.

Overcast

43°F

6°C

Humidity 93%
Wind Speed N 9 mph
Barometer 29.98 in
Dewpoint 41°F (5°C)
Visibility 10.00 mi
Wind Chill38°F (3°C)
Last update 18 May 4:48 pm MDT
Extended Forecast for

Thornton CO

  • This Afternoon

    This Afternoon: Showers and possibly a thunderstorm. Steady temperature around 39. North wind around 11 mph, with gusts as high as 21 mph. Chance of precipitation is 80%.

    High: 39 °F

    Showers

  • Tonight

    Tonight: Rain showers likely, possibly mixing with snow after midnight, then gradually ending. Patchy fog after midnight. Otherwise, cloudy, with a low around 35. North wind 6 to 11 mph becoming light north northeast after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.

    Low: 35 °F

    Showers
    Likely then
    Slight Chance
    Rain/Snow and
    Patchy Fog

  • Tuesday

    Tuesday: A chance of showers between noon and 3pm, then a chance of showers and thunderstorms after 3pm. Patchy fog before 9am. Otherwise, mostly cloudy, with a high near 51. Calm wind becoming north 5 to 7 mph in the afternoon. Chance of precipitation is 50%.

    High: 51 °F

    Patchy Fog
    then Chance
    Showers

  • Tuesday Night

    Tuesday Night: Showers likely, mainly before midnight. Cloudy, with a low around 40. North northwest wind 5 to 7 mph becoming calm in the evening. Chance of precipitation is 70%.

    Low: 40 °F

    Showers
    Likely then
    Chance
    Showers

  • Wednesday

    Wednesday: A slight chance of showers, then showers likely and possibly a thunderstorm after noon. Mostly cloudy, with a high near 59. Light and variable wind becoming north northeast 5 to 7 mph in the morning. Winds could gust as high as 15 mph. Chance of precipitation is 70%.

    High: 59 °F

    Slight Chance
    Showers then
    Showers
    Likely

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight. Mostly cloudy, with a low around 42. Chance of precipitation is 40%.

    Low: 42 °F

    Chance
    Showers then
    Partly Cloudy

  • Thursday

    Thursday: Showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 66. Chance of precipitation is 60%.

    High: 66 °F

    Partly Sunny
    then Showers
    Likely

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm before midnight, then a chance of showers. Mostly cloudy, with a low around 44.

    Low: 44 °F

    Showers
    Likely

  • Friday

    Friday: A slight chance of showers, then a chance of showers and thunderstorms after noon. Partly sunny, with a high near 66.

    High: 66 °F

    Slight Chance
    Showers then
    Chance
    T-storms

Detailed Forecast

This Afternoon
Showers and possibly a thunderstorm. Steady temperature around 39. North wind around 11 mph, with gusts as high as 21 mph. Chance of precipitation is 80%.
Tonight
Rain showers likely, possibly mixing with snow after midnight, then gradually ending. Patchy fog after midnight. Otherwise, cloudy, with a low around 35. North wind 6 to 11 mph becoming light north northeast after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.
Tuesday
A chance of showers between noon and 3pm, then a chance of showers and thunderstorms after 3pm. Patchy fog before 9am. Otherwise, mostly cloudy, with a high near 51. Calm wind becoming north 5 to 7 mph in the afternoon. Chance of precipitation is 50%.
Tuesday Night
Showers likely, mainly before midnight. Cloudy, with a low around 40. North northwest wind 5 to 7 mph becoming calm in the evening. Chance of precipitation is 70%.
Wednesday
A slight chance of showers, then showers likely and possibly a thunderstorm after noon. Mostly cloudy, with a high near 59. Light and variable wind becoming north northeast 5 to 7 mph in the morning. Winds could gust as high as 15 mph. Chance of precipitation is 70%.
Wednesday Night
A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight. Mostly cloudy, with a low around 42. Chance of precipitation is 40%.
Thursday
Showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 66. Chance of precipitation is 60%.
Thursday Night
Showers likely and possibly a thunderstorm before midnight, then a chance of showers. Mostly cloudy, with a low around 44.
Friday
A slight chance of showers, then a chance of showers and thunderstorms after noon. Partly sunny, with a high near 66.
Friday Night
A slight chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 45.
Saturday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 73.
Saturday Night
Partly cloudy, with a low around 48.
Sunday
Sunny, with a high near 80.
Sunday Night
Partly cloudy, with a low around 52.
Memorial Day
Sunny, with a high near 83.
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ABOUT THIS FORECAST

 
Point Forecast:
Thornton CO
 39.89°N 104.95°W (Elev. 5197 ft)
Last Update:
12:46 pm MDT May 18, 2026
Forecast Valid:
5pm MDT May 18, 2026-6pm MDT May 25, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation