Granby (CO) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Granby.
Climate overview of Granby
The climate in Granby, Colorado, United States of America, is marked by large temperature swings across the seasons, ranging from 25°C (77°F) in July to -2°C (28°F) in January.
With around 368 mm (14 in) of annual rain/snowfall, Granby has a fairly dry climate. However, it has a distinct dry season from August to April, with warm summers and very cold winters. The wettest month is May, while June sees the least rain.
Granby Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Granby - and find the best time to visit.
Monthly Temperature in Granby
In Granby, temperatures differ significantly between summer and winter months. Average daytime temperatures reach a comfortable 25°C (77°F) in July. In January, the coolest month of the year, temperatures drop to a very cold -2°C (28°F).
At night, temperatures range from around 6°C (43°F) in July to -18°C (0°F) in January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Granby
Granby typically sees modest rain/snowfall throughout the year, with an average annual precipitation of 368 mm (14 in). Granby can be quite wet during May, receiving approximately 46 mm (1.8 in) of precipitation over 14 rainy days.
In contrast, during the driest month (June), you will experience much drier conditions, with 17 mm (0.7 in) of precipitation 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
The average number of days each month with precipitation
Best Time to Visit Granby
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: June, July, August and September
- Warmest weather: July and August
- Fewest rainy days: June
- Seasonal pattern: A distinct dry season from August to April, with warm summers and very cold winters
- Coldest conditions: January, with freezing nights around -18°C (0°F).
Frequently asked questions about the climate in Granby
What is the best time to visit Granby?
June, July, August and September typically offer the most optimal weather in Granby. In contrast, January, February, April and December tend to have less optimal conditions. Granby has a distinct dry season from August to April, with warm summers and very cold winters.
What temperatures can I expect in Granby?
Daytime highs range from -2°C (28°F) in January to 25°C (77°F) in July. Nighttime lows range from -18°C (0°F) to 6°C (43°F). Temperatures vary considerably through the year.
How much rain does Granby get?
Annual rainfall is around 368 mm (14 in). May is the wettest month with 46 mm (1.8 in), while June is the driest with 17 mm (0.7 in).
Granby 3-Day Forecast
Granby (CO) 3-Day Forecast
Granby on the map
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