Climate Insights for Gunnison

The climate in Gunnison is cool. The average annual temperature is 2°C and approximately 601mm of precipitation falls per year. January is the wettest month, receiving around 70mm of rainfall. Gunnison is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: July, August, June. The coldest months are December, January, November, when temperatures can drop to -16°C. Gunnison experiences heavy snowfall, typically from January through December.

Gunnison has a wide annual temperature range, spanning 39°C from the coldest to warmest months. July is the warmest month, though highs remain moderate at 23°C with a mean of 15°C. December brings the harshest conditions, with lows dropping to -16°C and an average temperature of -10°C. On average, daily temperatures fluctuate by about 14°C between overnight lows and afternoon highs. The sharpest temperature change occurs between September and October, with a 8°C shift in average temperatures.

Gunnison is a relatively dry area, receiving approximately 601mm of precipitation annually, which averages out to around 50mm per month. The wettest month is January, averaging 70mm of rainfall. February and March also tend to see above-average precipitation. The driest month is June, with just 21mm. That's 50mm less than January, the wettest month. Precipitation varies noticeably between seasons, with the first half (January to June) of the year generally seeing more rainfall. Gunnison receives heavy snowfall, accumulating around 416cm annually from January through December. The snowiest month is January, with approximately 70cm. Winter travel should account for significant snow cover.

Gunnison is relatively calm, with an average annual wind speed of 2km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is April, averaging 2km/h, though still comfortable for most outdoor activities. The calmest conditions occur in December, with average winds dropping to 2km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 0km/h between the calmest and windiest months.

It is currently spring in Gunnison, which began on March 20, 2026. Gunnison is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in July at around 23°C, while the coldest stretch bottoms out in December near -16°C. Summer is next, beginning on June 21, 2026 — 7 days from now.

The table below shows monthly climate averages for Gunnison based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Snow is measured in centimetres (cm) and reflects average monthly snowfall accumulation. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.