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Longmont, CO 80503 Weather
Current conditions
Forecast for this hour (no station report in the last two hours)
Forecast
10-day-
Tonight
Mostly clear, with a low around 47. West northwest wind around 6 mph.
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Wednesday
Mostly sunny, with a high near 77. Southeast wind 1 to 6 mph.
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Wednesday Night
Mostly cloudy, with a low around 49. Northwest wind around 5 mph.
National Weather Service forecast updated 9 hrs ago.
Hourly
Hourly forecast- Now57°
- 11 PM55°
- Wed12 AM53°
- 1 AM52°
- 2 AM51°
- 3 AM50°
- 4 AM49°
- 5 AM48°
- 6 AM48°
- 7 AM47°
- 8 AM48°
- 9 AM56°
- 10 AM64°
- 11 AM69°
- 12 PM71°
- 1 PM75°
- 2 PM76°
- 3 PM77°
- 4 PM77°
- 5 PM76°
- 6 PM73°13%
- 7 PM69°13%
- 8 PM63°13%
- 9 PM61°13%
10-day forecast
Details- TonightOct 20Mostly Clear47°
- WedOct 21Mostly Sunny13%49°77°
- ThuOct 22Mostly Cloudy then Slight Chance Rain Showers16%50°73°
- FriOct 23Mostly Sunny14%44°78°
- SatOct 24Chance Rain Showers35%38°57°
- SunOct 25Partly Sunny19%38°58°
- MonOct 26Slight Chance Rain Showers then Mostly Sunny19%36°58°
- TueOct 27Mostly Sunny61°
- WedOct 28Sunny31°56°
- ThuOct 29Mostly sunny30°62°
Days after the National Weather Service's seven are MET Norway's outlook, a computer model with no forecaster's review.
Radar
Full mapWeather news near Longmont
More weather news-
Dangerous Freeze Watch Warning Issued for Massive Area of Nebraska, Wyoming and ColoradoA Freeze Watch is in effect from late Thursday night through Friday morning for the Denver metro area, Colorado’s eastern plains, southeast and central Wyoming, and the Nebraska Panhandle, with lows in the 20s possible…
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More clouds for Front Range with flooding rains heading to southwest ColoradoCBS News More clouds for Front Range with flooding rains heading to southwest Colorado MS misdiagnoses raise concerns, Colorado doctors warn of unnecessary treatment risks College bound Coloradans get ready for state…
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Heavy rain could bring flash flooding to New Mexico, southwest Colorado through FridayKRQE A strong storm system will bring widespread rain to New Mexico and southwest Colorado starting Wednesday, with several inches of rain possible in some areas through Friday Heavy rainfall could lead to flash…
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5 El Niño myths, busted. Here's what the 'Godzilla' El Niño could really mean for ColoradoSnow on Star Dune and Crestone Peaks in Great Sand Dunes National Park and Preserve. As a record-breaking El Niño continues to strengthen in the Pacific Ocean, the world is entering uncharted territory. As El Niño…
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A warm week is on tap for southern Colorado with mountain shower chancesKOAA News 5 Tonight's Forecast:Overnight lows continue to stay mild in the 40s for most Not much cloud cover is expected into the overnight while southern Colorado stays dry.Colorado Springs forecast: Low: 46; High…
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Heavy rain and flash flooding possible in New Mexico, southwest Colorado this weekKRQE A strong storm system will bring widespread rain to New Mexico and southwest Colorado Wednesday through Friday Heavy rainfall could lead to flash flooding, especially Thursday and Friday Several inches of rain are…
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More snow on the way for Colorado’s Western Slope as temperatures dropNewsNews | Oct 19, 2026 October is bringing in another round of stormy weather to wrap up the cooling month, translating into rain — and later, snow — for parts of western Colorado. So far, this October has been “wetter…
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Colorado Springs weather: Clear skies, milder temperatures this weekMonday is expected to be sunny, with light, variable winds and a high in the upper 60s, said News 5 meteorologist Lauren Brand. “These calm conditions will last over the next few days as this ridge of high pressure…
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A warmer than average Sunday on tap for southern ColoradoKKTV A warmer than average Sunday on tap for southern Colorado
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Warm and dry conditions for most of the week in Southern ColoradoTonight we will see partly cloudy skies for most areas in Southern Colorado. We will have winds out of the east at around 5 to 10 mph. Lows will fall into the mid to upper 40s. Monday will bring us most sunny skies but…
Air quality
Acceptable. Unusually sensitive people should consider limiting prolonged outdoor exertion.
Forecast
- TueModerate
- WedModerate
Denver-Boulder, CO reporting area · 1 hr ago. Data from AirNow (EPA and its state, local and tribal partners); preliminary and subject to change.
Sun & moon
Almanac
MonthlyLongmont 2 Ese, records since 1893. Normals 1991–2020. Data from NOAA's Regional Climate Centers (ACIS).
Nearby
- Denver 49 km
- Aurora 55 km
- Fort Collins 48 km
- Lakewood 51 km
- Thornton 36 km
- Westminster 37 km
- Arvada 40 km
- Greeley 49 km
- Boulder 18 km
- Loveland 28 km
- Broomfield 27 km
- Commerce City 43 km
Forecasters' discussion
From the National Weather Service office in BOU, issued 4 hrs ago
Key Messages
- Mild temperatures through Friday. Mostly dry through early Wednesday.
- Isolated light rain/snow showers possible over the mountains Tuesday afternoon.
- A more organized system late Wednesday through early Friday, with rain showers becoming more numerous over the mountains.
- Seasonable temperatures for the weekend into next week.
Bou Watches
None.
Forecasts, observations and alerts in the United States come from the National Weather Service (NOAA); radar from NOAA's Multi-Radar Multi-Sensor system; satellite imagery from NASA's Global Imagery Browse Services (GIBS) and NOAA's GOES satellites; the map from the U.S. Geological Survey's National Map; air quality from AirNow (EPA and its partners); hurricane information from the National Hurricane Center; climate normals and records from NOAA's Regional Climate Centers (ACIS). Forecasts outside the United States and the UV index: MET Norway (CC BY 4.0); observations outside the U.S.: airport reports via NOAA's Aviation Weather Center. Place names: GeoNames (CC BY 4.0). Data are copied on a schedule and may lag the sources; for warnings that affect your safety, follow your local National Weather Service office and emergency officials. Weather news is drawn from the 4Search index and reflects what the press published. Terms of use.