Longmont, Colorado Weather
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Weather Forecast for Longmont, Colorado : Boulder County
Issued: 2:32 pm MDT Jun 23, 2025 Latitude: 40.1672069 Longitude: -105.1019275 View on Google Maps

MouseOver for Detail Forecast
Overnight Tuesday Wednesday Thursday Friday Saturday Sunday Monday
Mostly Cloudy on Overnight 60% chance of thunderstorms on Tuesday 50% chance of thunderstorms on Wednesday Sunny on Thursday Sunny on Friday Mostly Sunny on Saturday 20% chance of thunderstorms on Sunday 20% chance of thunderstorms on Monday
Low: 55°F High: 80°F High: 82°F High: 88°F High: 93°F High: 93°F High: 87°F High: 85°F
Low: 58°F Low: 55°F Low: 57°F Low: 58°F Low: 57°F Low: 56°F  
Mostly Cloudy Thunderstorms Thunderstorms Sunny Sunny Mostly Sunny Thunderstorms Thunderstorms
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Current Conditions at
BROOMFIELD - (KBJC)
61°
Cloudy
as of 12:55 AM MDST
Rel. Humidity: 82%
Dew Point: 55°F
Visibility: 10 Miles
Pressure: 30.22 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Scattered at 4400ft, Solid Overcast at 5000ft
Current Conditions at
FT COLLINS - (KFNL)
63°
Partly Cloudy
as of 12:56 AM MDST
Rel. Humidity: 77%
Dew Point: 55°F
Visibility: 10 Miles
Pressure: 30.18 in.
Flight Rule: VFR
Wind Data
5 MPH
Cloud Level(s): Scattered at 6000ft
Current Conditions at
DENVER INTL - (KDEN)
64°
Mostly Cloudy
as of 12:53 AM MDST
Rel. Humidity: 72%
Dew Point: 55°F
Visibility: 10 Miles
Pressure: 30.19 in.
Flight Rule: VFR
Wind Data
13 MPH
180° South
Cloud Level(s): Few at 4800ft, Broken at 6000ft
Mostly Cloudy on Overnight Overnight... Mostly cloudy, with a low around 55. Calm wind.
60% chance of thunderstorms Tuesday Tuesday... A slight chance of showers before noon, then showers likely and possibly a thunderstorm between noon and 3pm, then showers and thunderstorms likely after 3pm. Partly sunny, with a high near 80. Calm wind becoming south 5 to 7 mph in the afternoon. Chance of precipitation is 60%.
20% chance of thunderstorms Tuesday Night Tuesday Night... A slight chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and midnight. Mostly cloudy, with a low around 58. South southeast wind 5 to 7 mph becoming calm in the evening. Winds could gust as high as 16 mph. Chance of precipitation is 20%.
50% chance of thunderstorms Wednesday Wednesday... A 50 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 82. Calm wind becoming northeast 5 to 7 mph in the afternoon. Winds could gust as high as 16 mph.
20% chance of thunderstorms Wednesday Night Wednesday Night... A slight chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and midnight. Partly cloudy, with a low around 55. Northwest wind around 6 mph becoming calm in the evening. Winds could gust as high as 15 mph. Chance of precipitation is 20%.
Sunny on Thursday Thursday... Sunny, with a high near 88.
Mostly Clear on Thursday Night Thursday Night... Mostly clear, with a low around 57.
Sunny on Friday Friday... Sunny, with a high near 93.
Mostly Clear on Friday Night Friday Night... Mostly clear, with a low around 58.
Mostly Sunny on Saturday Saturday... Mostly sunny, with a high near 93.
Cloudy on Saturday Night Saturday Night... Partly cloudy, with a low around 57.
20% chance of thunderstorms Sunday Sunday... A chance of showers and thunderstorms. Mostly sunny, with a high near 87.
10% chance of thunderstorms Sunday Night Sunday Night... A slight chance of showers and thunderstorms. Partly cloudy, with a low around 56.
20% chance of thunderstorms Monday Monday... A chance of showers and thunderstorms. Mostly sunny, with a high near 85.
Sun Almanac for Longmont, Colorado
Sunrise: 05:32 AM
Sunset: 8:34 PM
Civil Sunrise:04:59 AM
Civil Sunset: 9:07 PM
Nautical Sunrise: 04:17 AM
Nautical Sunset: 9:49 PM
Astro Sunrise: 03:28 AM
Astro Sunset: 10:38 PM
Any use of the information on this page is at your own risk. This information should not be relied upon in life-threatening situations, potential financial loss situations or in lieu of any officially disseminated information. Visit the National Weather Service for official information.