Climate Insights for Susanville

The climate in Susanville is cool. The average annual temperature is 10°C and approximately 733mm of precipitation falls per year. January is the wettest month, receiving around 127mm of rainfall. Susanville 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, February, January, when temperatures can drop to -5°C. Susanville experiences heavy snowfall, typically from January through December.

Susanville has a wide annual temperature range, spanning 37°C from the coldest to warmest months. The warmest month is July, when average highs reach 32°C and the mean temperature sits around 23°C. The coldest month is December, when overnight lows fall to -5°C and the daily average is -1°C. On average, daily temperatures fluctuate by about 14°C between overnight lows and afternoon highs. The sharpest temperature change occurs between October and November, with a 8°C shift in average temperatures.

Susanville is a relatively dry area, receiving approximately 733mm of precipitation annually, which averages out to around 61mm per month. The wettest month is January, averaging 127mm of rainfall. December and March also tend to see above-average precipitation. The driest month is July, with just 6mm. That's 121mm less than January, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic. Susanville receives heavy snowfall, accumulating around 278cm annually from January through December. The snowiest month is January, with approximately 65cm. Winter travel should account for significant snow cover.

Susanville is mildly breezy, with an average annual wind speed of 13km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is June, averaging 15km/h, though still comfortable for most outdoor activities. The calmest conditions occur in December, with average winds dropping to 11km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 4km/h between the calmest and windiest months. Wind tends to pick up during the summer months. The seasonal averages are 11km/h in winter, 14km/h in spring, 14km/h in summer, 12km/h in autumn.

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It is currently spring in Susanville, which began on March 20, 2026. Susanville 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 32°C, while the coldest stretch bottoms out in December near -5°C. Summer is next, beginning on June 21, 2026 — 51 days from now.

The best time to visit Susanville is during June, July, August and September, when the weather is most comfortable for travellers. During these months, average temperatures hover around 20°C with modest rainfall averaging 12mm per month. By contrast, December can be quite cold with temperatures dropping to -5°C. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.

The table below shows monthly climate averages for Susanville 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.