Climate in Longmont (Colorado), United States of America

The graphs below show the monthly weather averages over the year.

Average day and night temperature

The mean minimum and maximum temperatures over the year.

Average monthly minimum and maximum temperature in Longmont, the United States of America

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Monthly hours of sunshine

The average monthly total hours of sunshine over the year

Average monthly hours of sunshine in Longmont, the United States of America

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* Data from: Denver, the United States of America (50 KM, 31 Miles).

Daily percent of sunshine

The mean percent of hours of sunhours during the day over the year

Average monthly percentage of sunshine in Longmont, the United States of America

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* Data from: Denver, the United States of America (50 KM, 31 Miles).

Monthly precipitation

The mean monthly precipitation over the year, including rain, snow, hail etc.

Average monthly rainfall, snow, precipitation in Longmont, the United States of America

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Monthly rainy days

The average number of days each month with rain, snow, hail etc.

Average monthly rainy days in Longmont, the United States of America

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Average humidity

The mean monthly relative humidity over the year

Average monthly relative humidity in Longmont, the United States of America

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* Data from: Denver, the United States of America (50 KM, 31 Miles).

Weather Forecasts for Longmont (CO)

Fri   Mar 29
13°C | 2°C
N 11 km/h
2.6 mm
broken clouds and slight rain

broken clouds and slight rain

Sat   Mar 30
16°C | 1°C
NW 7 km/h
broken clouds and no rain

broken clouds and no rain

Sun   Mar 31
18°C | 3°C
W 11 km/h
0.8 mm
partly cloudy and thunder

partly cloudy and thunder

The best time of year to visit Longmont in the United States of America

Other facts from our historical weather data:

  • When is summer in Longmont?
    The hottest season / summer takes place in June, July, August and September.
  • Does Longmont have a dry season?
    Yes, the months of January, February and November are very dry.
  • Which is the warmest month in Longmont?
    July has an average maximum temperature of 32°C and is the warmest month of the year.
  • Which is the coldest month in Longmont?
    The coldest month is December with an average maximum temperature of 6°C.
  • Which is the wettest month in Longmont?
    May tops the wettest month list with 62 mm of rainfall.
  • Which is the driest month in Longmont?
    January is the driest month with 10 mm of precipitation.
  • Which is the sunniest month in Longmont?
    July is the sunniest month with an average of 323 hours of sunshine.

  • No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.