4 to 30°C
temperature
3484 hours
sunshine per day
198 mm
rain
235 days
dry
95 days
rain
35 days
snow

Climate of Longmont

Longmont has a oceanic climate. There is rainfall during all months of the year. The average annual temperature for Longmont is 16° degrees and there is about 199 mm of rain in a year. It is dry for 214 days a year with an average humidity of 53% and an UV-index of 4.

Climate averages for the whole year

  • Day: the average daily temperature during the day is between 4°C and 30°C
  • Night:the average nighttime temperature is between -7°C and 15°C
  • Rain: it rains 95 days and there is a total of approximately 198 mm rainfall
  • Snow: it snows an average of 35 days per year
  • Sun hours: throughout the year there are 3484 sun hours
Maximum temperature: between 4°C and 30°C
Warmest month: 30°C in July
Coldest month: 4°C in December
Night temperature: between -7°C and 15°C
Dry days: 235 days
Days with rain: 95 days
Days with snow: 35 days
Total rain sum: 198 mm
Hours of sunshine: 3484 hours

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Temperature graph

This graph shows the average maximum temperature (red) and minimum temperature (blue) for Longmont.

Precipitation graph

This graph shows the average amount of rainfall per month for Longmont.

Climate table of Longmont

In this climate table you can see at a glance what the average weather per month is for Longmont. The data has been collected over a 30-year period, from which an average per month has been derived. From year to year the differences may be larger or smaller, but with this climate table you have a good idea of what the weather for Longmont might be like in a given month.

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Day temp. (°C) 5 5 11 14 19 28 30 29 25 17 10 4
Night temp. (°C) -6 -6 -1 1 6 12 15 14 11 4 -2 -7
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Precipitation (mm) 9 9 17 23 33 15 26 18 15 15 10 8
Days with rain 3 3 7 10 14 9 14 11 9 6 4 5
Days with snow 6 7 5 3 1 - - - - 2 5 6
Dry days 22 18 19 17 16 21 17 20 21 23 21 20
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Sun hours per day 7 7 9 11 11 12 12 12 11 7 7 7
Wind force (Bft) 2 2 2 2 2 2 2 2 2 2 2 2
UV-index 2 2 3 3 5 6 6 5 4 3 2 2

Best time to visit Longmont

The best time to visit Longmont in the state of Colorado is from May through September. In this period you have a warm temperature and almost no precipitation. The highest average temperature in Longmont is 30°C in July and the lowest is 4°C in December.

Climate of Longmont by month

What is the average climate in a given month for Longmont? Click on a month to see all monthly averages for sunshine, maximum and minimum temperatures, percent chance of rain per day, snowfall and number of rainy days.

Longmont weather experiences

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