When to go · Ontario, Oregon
Ontario, Oregon, month by month
The best months for Ontario, Oregon: May, Jun, Sep, Oct. Months to avoid: Jan, Feb, Jul, Aug, Dec.
Month by month
- JanuaryAvoidListed as a month to avoid: Jul–Aug (hot, 35 °C (95 °F)+ days), Dec–Feb (ice on I-84).Listed as a month to avoid: Jul–Aug (hot, 95 °F (35 °C)+ days), Dec–Feb (ice on I-84).3 °C (37 °F) / -5 °C (23 °F), 8 rain days37 °F (3 °C) / 23 °F (-5 °C), 8 rain daysCrowds: Low
- FebruaryAvoidListed as a month to avoid: Jul–Aug (hot, 35 °C (95 °F)+ days), Dec–Feb (ice on I-84).Listed as a month to avoid: Jul–Aug (hot, 95 °F (35 °C)+ days), Dec–Feb (ice on I-84).8 °C (46 °F) / -3 °C (27 °F), 7 rain days46 °F (8 °C) / 27 °F (-3 °C), 7 rain daysCrowds: Low · 1 festival or holiday
- MarchGoodOutside the best window (May–Jun, Sep–Oct). Across United States: Spring break fills Florida beaches and parks; the desert parks come into season.14 °C (57 °F) / 1 °C (34 °F), 8 rain days57 °F (14 °C) / 34 °F (1 °C), 8 rain daysCrowds: Medium · 2 festivals or holidays
- AprilGoodOutside the best window (May–Jun, Sep–Oct). Across United States: Good month for the Southwest, Washington cherry blossoms, the South; mountain roads still closed.19 °C (66 °F) / 4 °C (39 °F), 7 rain days66 °F (19 °C) / 39 °F (4 °C), 7 rain daysCrowds: Medium · 1 festival or holiday
- MayGreatInside Ontario, Oregon's best window: May–Jun, Sep–Oct.24 °C (75 °F) / 8 °C (46 °F), 7 rain days75 °F (24 °C) / 46 °F (8 °C), 7 rain daysCrowds: Medium · 1 festival or holiday
- JuneGreatInside Ontario, Oregon's best window: May–Jun, Sep–Oct.29 °C (84 °F) / 12 °C (54 °F), 5 rain days84 °F (29 °C) / 54 °F (12 °C), 5 rain daysCrowds: High
- JulyAvoidListed as a month to avoid: Jul–Aug (hot, 35 °C (95 °F)+ days), Dec–Feb (ice on I-84).Listed as a month to avoid: Jul–Aug (hot, 95 °F (35 °C)+ days), Dec–Feb (ice on I-84).34 °C (93 °F) / 16 °C (61 °F), 2 rain days93 °F (34 °C) / 61 °F (16 °C), 2 rain daysCrowds: High · 1 festival or holiday
- AugustAvoidListed as a month to avoid: Jul–Aug (hot, 35 °C (95 °F)+ days), Dec–Feb (ice on I-84).Listed as a month to avoid: Jul–Aug (hot, 95 °F (35 °C)+ days), Dec–Feb (ice on I-84).33 °C (91 °F) / 15 °C (59 °F), 2 rain days91 °F (33 °C) / 59 °F (15 °C), 2 rain daysCrowds: High
- SeptemberGreatInside Ontario, Oregon's best window: May–Jun, Sep–Oct.27 °C (81 °F) / 10 °C (50 °F), 3 rain days81 °F (27 °C) / 50 °F (10 °C), 3 rain daysCrowds: Medium · 1 festival or holiday
- OctoberGreatInside Ontario, Oregon's best window: May–Jun, Sep–Oct.19 °C (66 °F) / 4 °C (39 °F), 5 rain days66 °F (19 °C) / 39 °F (4 °C), 5 rain daysCrowds: Medium
- NovemberMixedOutside the best window (May–Jun, Sep–Oct). Across United States: Quiet between holidays; Thanksgiving week is the busiest travel period of the year.9 °C (48 °F) / -1 °C (30 °F), 8 rain days48 °F (9 °C) / 30 °F (-1 °C), 8 rain daysCrowds: Medium · 1 festival or holiday
- DecemberAvoidListed as a month to avoid: Jul–Aug (hot, 35 °C (95 °F)+ days), Dec–Feb (ice on I-84).Listed as a month to avoid: Jul–Aug (hot, 95 °F (35 °C)+ days), Dec–Feb (ice on I-84).3 °C (37 °F) / -5 °C (23 °F), 9 rain days37 °F (3 °C) / 23 °F (-5 °C), 9 rain daysCrowds: High · 1 festival or holiday
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.