Climate almanac
Ontario
Oregon, US · 44.03°, -116.96°
What is the climate like in Ontario?
The best time to visit Ontario is typically April – October, with trip comfort peaking in June (8.7/10). Ontario is warmest in July, when daily highs average 99°F (37°C), and coolest in January, when lows fall to about 27°F (-3°C). The wettest month is typically December and the driest is July; the year sees roughly 11 in of precipitation.
- Best time to visitApril – October — comfort peaks in June (8.7/10)
- Warmest monthJuly — average high 99°F (37°C)
- Coolest monthJanuary — average low 27°F (-3°C)
- Wettest monthDecember (1.8 in)
- Driest monthJuly (0.1 in)
- Annual precipitation11 in