Guerneville Weather in September

Guerneville in September sees high temperatures, with highs around 27°C (81°F) and overnight lows of 10°C (50°F). With just 7.4 mm (0.3 in) of rainfall on average, rain is rarely an issue.

Rainfall in Guerneville in September

Typically around 2 days of rainfall are expected, averaging 7.4 mm (0.3 in) for the month. Rain days are few and the total is low, so this is a largely dry month. Any showers that do occur tend to be brief.

Temperature in Guerneville in September

September is a good time to be in Guerneville. Days are excellent, reaching 27°C (81°F), with nights around 10°C (50°F). Summer occurs in September. This kind of day-to-night contrast is typical for this time of year. At 10°C (50°F) overnight, it gets properly cold after dark. On the bright side, cold nights tend to make for excellent sleeping conditions.

Sunshine in Guerneville in September

The city usually sees around 275 hours of sunlight, indicating many sunny days , a great month for sightseeing.

If your ideal day consists of dry skies and pleasant temperatures, April, May, June, July, August, September and October typically offer the best circumstances for Guerneville.