What is today's weather forecast for Longmont, CO?

Today's forecast for Longmont shows a high of 63 degrees and a low of 35 degrees Fahrenheit. Sunny, with a high near 63.

What is the 7-day weather forecast for Longmont, CO?

The 7-day forecast for Longmont shows highs from 50 to 67 degrees and lows from 30 to 43 degrees Fahrenheit. Expect precipitation on 1 day with chances of 20% or higher.

Will it rain in Longmont, CO this week?

Yes, rain is possible in Longmont this week. Precipitation chances: Wednesday (30% chance).

How accurate is the Longmont weather forecast?

WeatherForYou provides highly accurate Longmont forecasts using National Weather Service data and current conditions from the nearest available weather stations, often miles closer than regional airports, for the most precise local forecasts.

Longmont, CO Weather Forecast and Current Conditions

Current Conditions From Nearby Local Station

Switch to Metric Units

25°F
Feels Like 25°F

Humidity 81% Dew Point 20°F Wind Calm Barometer 30.28 in.

Report from a personal weather station 0.3 mi. WNW of central Longmont
at 6:40 AM Mon, Dec 15, 2025

Point Forecast at a Glance

MonDec 15

TueDec 16

WedDec 17

ThuDec 18

FriDec 19

SatDec 20

SunDec 21

Jump to detailed forecast ↓

7-Day Temperature Trend

Week Ahead Summary

Significant warming trend with high temperatures climbing from 63°F to 54°F, reaching a high of 67°F. Mostly dry conditions with only one day showing rain chances.

Climate Context

This week's forecast shows temperatures running 18°F above the historical average for December. Normal highs for this period are around 42°F with lows around 17°F.

This Date in Weather History

1901 - An intense cold front swept across the eastern U.S. The cold front produced heavy rain in Louisiana, and heavy snow in the northeastern U.S.

Longmont, CO 7 Day Weather Forecast Details

Monday Dec 15

Day: Sunny, with a high near 63. West wind around 5 mph becoming calm in the morning.

Night: Increasing clouds, with a low around 35. West wind around 7 mph.

Tuesday Dec 16

Day: Mostly sunny, with a high near 63. West southwest wind around 7 mph, with gusts as high as 17 mph.

Night: Partly cloudy, with a low around 35. West southwest wind 6 to 8 mph.

Wednesday Dec 17

Day: Mostly sunny, with a high near 63. Breezy, with a west wind 7 to 12 mph increasing to 18 to 23 mph in the afternoon. Winds could gust as high as 47 mph.

Night: A 30 percent chance of rain before 11pm. Partly cloudy, with a low around 30. Breezy.

Thursday Dec 18

Day: Mostly sunny, with a high near 50.

Night: Partly cloudy, with a low around 33.

Friday Dec 19

Day: Mostly sunny, with a high near 67.

Night: Partly cloudy, with a low around 43.

Saturday Dec 20

Day: Mostly sunny, with a high near 60.

Night: Partly cloudy, with a low around 32.

Sunday Dec 21

Day: Mostly sunny, with a high near 54.

About Longmont, CO

Longmont is a home rule municipality located in Boulder and Weld counties, Colorado, United States. Its population was 98,885 as of the 2020 U.S. census. Longmont is located northeast of the county seat of Boulder. It is named after Longs Peak, a prominent mountain that is clearly visible from the city (mont means "mountain" in French).

Content from Wikipedia, licensed under CC BY-SA 3.0.

How We Provide Better Local Weather

Current conditions: We use the nearest available station to your location - including professional MESONET/MADIS and local weather stations - often miles closer than regional airports.

Forecasts: National Weather Service point forecasts predict for your specific area, not broad regional zones, making them far more relevant to your location.

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