Climate Insights for Susanville

The climate in Susanville is cool. The average annual temperature is 9°C and approximately 666mm of precipitation falls per year. March is the wettest month, receiving around 105mm 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 February, December, 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 36°C from the coldest to warmest months. The warmest month is July, when average highs reach 31°C and the mean temperature sits around 22°C. The coldest month is February, when overnight lows fall to -5°C and the daily average is 0°C. On average, daily temperatures fluctuate by about 13°C between overnight lows and afternoon highs. The sharpest temperature change occurs between September and October, with a 7°C shift in average temperatures.

Susanville is a relatively dry area, receiving approximately 666mm of precipitation annually, which averages out to around 55mm per month. The wettest month is March, averaging 105mm of rainfall. January and December also tend to see above-average precipitation. The driest month is July, with just 8mm. That's 96mm less than March, 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 366cm annually from January through December. The snowiest month is January, with approximately 79cm. Winter travel should account for significant snow cover.

Susanville is relatively calm, with an average annual wind speed of 8km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is March, averaging 9km/h, though still comfortable for most outdoor activities. The calmest conditions occur in August, with average winds dropping to 7km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 2km/h between the calmest and windiest months.

It is currently summer in Susanville, which began on June 21, 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 31°C, while the coldest stretch bottoms out in February near -5°C. Autumn is next, beginning on September 23, 2026 (7 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 19°C with modest rainfall averaging 15mm per month. By contrast, February 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.