When to go · San Dimas
San Dimas in September
Great month. Inside San Dimas's best window: Jun–Sep (waterpark season).
Key facts
- Verdict
- Great
- Temperature
- 31°C (88°F)88°F (31°C) / 16°C (61°F)61°F (16°C)
- average high / low
- Rain days
- 1
- Crowds
- Medium
- United States overall
- Prices
- Medium
- United States overall
Verdict
Inside San Dimas's best window: Jun–Sep (waterpark season).
Is another month better than September?
No other month rates higher than September for San Dimas in this guide.
Weather in September
- San DimasHighs around 31 °C (88 °F), lows around 16 °C (61 °F), rain on about 1 dayHighs around 88 °F (31 °C), lows around 61 °F (16 °C), rain on about 1 day
Festivals and holidays
Dates as our data lists them. Moving holidays (lunar and Islamic calendars, Easter) shift every year: check the date for your year before you build a trip on it.
Labor Day big impact
1st Monday of September · United States
End of summer; last big road-trip weekend.
Crowds and prices
- Crowds · United States overall
- Medium
- Prices · United States overall
- Medium
United States overall: After Labor Day the crowds drop and parks stay open; Florida and the Gulf are at hurricane peak.
Compare two months
Weather, crowds and prices for any two months in San Dimas, side by side.
Verdict
Sep: Great
Jun: Great
Daytime high
Sep: 31 °C (88 °F)88 °F (31 °C)
Jun: 29 °C (84 °F)84 °F (29 °C)
Night low
Sep: 16 °C (61 °F)61 °F (16 °C)
Jun: 16 °C (61 °F)61 °F (16 °C)
Rain days
Sep: 1
Jun: 1
Crowds
Sep: Medium
Jun: High
Prices
Sep: Medium
Jun: High
Festivals listed
Sep: 1
Jun: 0
September: Inside San Dimas's best window: Jun–Sep (waterpark season).
June: Inside San Dimas's best window: Jun–Sep (waterpark season).
San Dimas: figures are long-term averages from this guide, not a forecast.
What to pack
- Light, breathable clothes, a sun hat and sunscreen