When to go · Ontario, Oregon
Ontario, Oregon in September
Great month. Inside Ontario, Oregon's best window: May–Jun, Sep–Oct.
Key facts
- Verdict
- Great
- Temperature
- 27°C (81°F)81°F (27°C) / 10°C (50°F)50°F (10°C)
- average high / low
- Rain days
- 3
- Crowds
- Medium
- United States overall
- Prices
- Medium
- United States overall
Verdict
Inside Ontario, Oregon's best window: May–Jun, Sep–Oct.
Is another month better than September?
No other month rates higher than September for Ontario, Oregon in this guide.
Weather in September
- Ontario, OregonHighs around 27 °C (81 °F), lows around 10 °C (50 °F), rain on about 3 daysHighs around 81 °F (27 °C), lows around 50 °F (10 °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 Ontario, Oregon, side by side.
Verdict
Sep: Great
May: Great
Daytime high
Sep: 27 °C (81 °F)81 °F (27 °C)
May: 24 °C (75 °F)75 °F (24 °C)
Night low
Sep: 10 °C (50 °F)50 °F (10 °C)
May: 8 °C (46 °F)46 °F (8 °C)
Rain days
Sep: 3 (better)
May: 7
Crowds
Sep: Medium
May: Medium
Prices
Sep: Medium
May: Medium
Festivals listed
Sep: 1
May: 1
September: Inside Ontario, Oregon's best window: May–Jun, Sep–Oct.
May: Inside Ontario, Oregon's best window: May–Jun, Sep–Oct.
Ontario, Oregon: figures are long-term averages from this guide, not a forecast.
What to pack
- A warm layer for the evenings