Climate Insights for Sebastopol

The climate in Sebastopol is warm and mild. The average annual temperature is 24°C and approximately 1225mm of precipitation falls per year. Sebastopol receives a notable amount of rainfall throughout the year, including during its driest month. Sebastopol is in the Southern Hemisphere. The seasons are reversed — summer runs from December to February, while winter falls between June and August. The summer months are: February, March, January. The coldest months are August, September, July, when temperatures can drop to 21°C.

Sebastopol has relatively stable temperatures year-round, staying within a 7°C range. The warmest month is February, when average highs reach 28°C and the mean temperature sits around 26°C. August is the coolest month, with minimum temperatures around 21°C and an average of 22°C. Daily temperature variation is modest, with an average difference of 2°C between highs and lows.

Sebastopol is a fairly wet location, receiving approximately 1225mm of precipitation annually, which averages out to around 102mm per month. The wettest month is February, averaging 221mm of rainfall. January and March also tend to see above-average precipitation. The driest month is October, with just 33mm. That's 188mm less than February, 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.

Sebastopol is relatively calm, with an average annual wind speed of 6km/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 8km/h, though still comfortable for most outdoor activities. The calmest conditions occur in February, with average winds dropping to 5km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 3km/h gap between the calmest and windiest months. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 8km/h in winter, 6km/h in spring, 5km/h in summer, 6km/h in autumn.

It is currently winter in Sebastopol, which began on June 21, 2026. Sebastopol is in the Southern Hemisphere, where the seasons are reversed — spring starts in September, summer in December, autumn in March, and winter in June. The warmest period peaks in February at around 28°C, while the coldest stretch bottoms out in August near 21°C. Spring is next, beginning on September 23, 2026 — 93 days from now.

The best time to visit Sebastopol is during May, June, July, August, September, October and November, when the weather is most comfortable for travellers. During these months, average temperatures hover around 23°C with modest rainfall averaging 53mm per month. By contrast, February can be uncomfortably hot with temperatures reaching 28°C. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.

The table below shows monthly climate averages for Sebastopol 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. 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.