When to go · Ontario, Oregon
Ontario, Oregon in May
Great month. Inside Ontario, Oregon's best window: May–Jun, Sep–Oct.
Key facts
- Verdict
- Great
- Temperature
- 24°C (75°F)75°F (24°C) / 8°C (46°F)46°F (8°C)
- average high / low
- Rain days
- 7
- 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 May?
No other month rates higher than May for Ontario, Oregon in this guide.
Weather in May
- Ontario, OregonHighs around 24 °C (75 °F), lows around 8 °C (46 °F), rain on about 7 daysHighs around 75 °F (24 °C), lows around 46 °F (8 °C), rain on about 7 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.
Memorial Day big impact
Last Monday of May · United States
Start of summer; roads and beaches full.
Crowds and prices
- Crowds · United States overall
- Medium
- Prices · United States overall
- Medium
United States overall: Warm and green; Memorial Day (last Monday) opens the summer season; timed-entry systems start at some parks.
Compare two months
Weather, crowds and prices for any two months in Ontario, Oregon, side by side.
Verdict
May: Great
Jun: Great
Daytime high
May: 24 °C (75 °F)75 °F (24 °C)
Jun: 29 °C (84 °F)84 °F (29 °C)
Night low
May: 8 °C (46 °F)46 °F (8 °C)
Jun: 12 °C (54 °F)54 °F (12 °C)
Rain days
May: 7
Jun: 5 (better)
Crowds
May: Medium
Jun: High
Prices
May: Medium
Jun: High
Festivals listed
May: 1
Jun: 0
May: Inside Ontario, Oregon's best window: May–Jun, Sep–Oct.
June: 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