Geyserville Weather in September

During September, Geyserville experiences high daytime temperatures of 30°C (86°F) and cooler nights around 11°C (52°F). Rainfall is low, averaging just 4.3 mm (0.2 in) for the month.

Rainfall in Geyserville in September

Expect around a single day of rain based on historical data, with 4.3 mm (0.2 in) average. If rain does fall, it tends to be a moderate shower rather than anything heavy.

Temperature in Geyserville in September

September is a good time to be in Geyserville. Days are excellent, reaching 30°C (86°F), with nights around 11°C (52°F). This kind of day-to-night contrast is typical for this time of year. Nights drop to around 11°C (52°F), which is noticeably cooler than the daytime. A light jacket for the evening is a sensible addition, and the cool nights tend to make sleeping comfortable.

Sunshine in Geyserville in September

Expect a lot of sunshine this month, with about 275 hours of sun. These sunny conditions add to the overall experience.

If you prefer enjoying temperate temperatures and rain-free days, April, May, June and October typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.