San Dimas Weather in September

With daytime temperatures of 32°C (90°F) and nighttime lows of 17°C (63°F), September in San Dimas brings very high temperatures during the day. The excellent weather makes it an appealing time to visit.

Rainfall in San Dimas in September

Expect around a single day of rain based on historical data, with 4.9 mm (0.2 in) average. If rain does fall, it tends to be a moderate shower rather than anything heavy.

Temperature in San Dimas in September

The temperature in San Dimas in September is excellent. Daytime highs reach 32°C (90°F), with nights dropping to 17°C (63°F). Indoor breaks or shaded spots can make the warmer part of the day much more comfortable. With lows of 17°C (63°F), nights are cool. If you're out after dark, an extra layer will keep you comfortable. The cooler air at night is also great for getting a good rest.

Sunshine in San Dimas in September

The month enjoys around 290 hours of sunshine, creating mostly sunny days with good weather conditions.

Should you favor a climate that's both dry and comfortably warm, January, February, March, April, May, October and November typically offer the most agreeable circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.