When to go · Rancho Cucamonga
Rancho Cucamonga in September
Great month. Inside Rancho Cucamonga's best window: Mar–Oct (dry, warm).
Key facts
- Verdict
- Great
- Temperature
- 31°C (88°F)88°F (31°C) / 17°C (63°F)63°F (17°C)
- average high / low
- Rain days
- 3
- Crowds
- Medium
- United States overall
- Prices
- Medium
- United States overall
Verdict
Inside Rancho Cucamonga's best window: Mar–Oct (dry, warm).
Is another month better than September?
No other month rates higher than September for Rancho Cucamonga in this guide.
Weather in September
- Rancho CucamongaHighs around 31 °C (88 °F), lows around 17 °C (63 °F), rain on about 3 daysHighs around 88 °F (31 °C), lows around 63 °F (17 °C), rain on about 3 days
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 Rancho Cucamonga, side by side.
Verdict
Sep: Great
Mar: Great
Daytime high
Sep: 31 °C (88 °F)88 °F (31 °C)
Mar: 19 °C (66 °F)66 °F (19 °C)
Night low
Sep: 17 °C (63 °F)63 °F (17 °C)
Mar: 7 °C (45 °F)45 °F (7 °C)
Rain days
Sep: 3 (better)
Mar: 5
Crowds
Sep: Medium
Mar: Medium
Prices
Sep: Medium
Mar: Medium
Festivals listed
Sep: 1
Mar: 2
September: Inside Rancho Cucamonga's best window: Mar–Oct (dry, warm).
March: Inside Rancho Cucamonga's best window: Mar–Oct (dry, warm).
Rancho Cucamonga: figures are long-term averages from this guide, not a forecast.
What to pack
- Light, breathable clothes, a sun hat and sunscreen