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Granby (CO) Weather and Climate: A Comprehensive Guide

The climate in Granby is marked by big temperature swings throughout the year. Temperatures range from warm during the warmest months to very cold in the cooler months. It's weather is marked by below-average rain/snowfall. Let's now guide you through the climate details for a complete overview.

Average maximum day and minimum night temperature

In Granby, temperatures differ significantly between summer and winter months. Average daytime temperatures reach a comfortable 25°C in July. In January, the coolest month of the year, temperatures drop to a very cold -2°C.

At night, you can expect cooler temperatures, with averages dropping to around -18°C during this month. Check out our detailed temperature page for more information.

Temperature ranges by month

Precipitation and rainy days

Granby typically sees modest rain/snowfall throughout the year, with an average annual precipitation of 368 mm. Granby can be quite wet during May, receiving approximately 46 mm of precipitation over 14 rainy days.

In contrast June, experiences much drier conditions, with 17 mm of rainfall, spread across 7 rainy days. For more details, please visit our Granby Precipitation page.

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

Forecast for Granby (CO)

Fri   Dec 27
-2°C | -8°C
W 3 m/s
2.2 mm
broken clouds and  chance of slight snow

broken clouds and chance of slight snow

Sat   Dec 28
0°C | -6°C
W 5 m/s
7.8 mm
overcast and slight snow

overcast and slight snow

Sun   Dec 29
4°C | -2°C
SW 4 m/s
10 mm
partly cloudy and slight snow

partly cloudy and slight snow

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

During the months of June, July, August and September you are most likely to experience good weather with pleasant average temperatures that fall between 20°C and 26°C.

Other facts from our historical weather data:
  • Does Granby have a dry season?
    Yes, the months of February, June and November are very dry.
  • When is winter in Granby?
    The coldest season / winter is in the following months: January, February and December.
  • Which is the warmest month in Granby?
    July has an average maximum temperature of 25°C and is the warmest month of the year.
  • Which is the coldest month in Granby?
    The coldest month is January with an average maximum temperature of -2°C.
  • Which is the wettest month in Granby?
    May tops the wettest month list with 46 mm of rainfall.
  • Which is the driest month in Granby?
    June is the driest month with 17 mm of precipitation.

  • 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.