Oshawa Weather & Climate

Canada

Oshawa sees feels-like daytime highs peak around 27.6°C in July and nighttime lows bottom out near -10.2°C in January. September is the wettest month (~53 mm), while February is the driest (~13 mm). For sunshine, August leads with about 66% clear skies.

Best time to visit Oshawa

Based on mild feels-like temperatures and low rain chances, the most comfortable months are August, June, and July — expect around 17.426.5°C with roughly 28% chance of rain on a given day in August.

Oshawa climate by month

MonthLow / High °CRain %RainfallClear skiesWind
January-10.2° / -4.3°7%14 mm36%22.7 kph
February-9.8° / -3.3°6%13 mm39%22.3 kph
March-5.6° / 2°11%21 mm44%20.7 kph
April1.3° / 10.2°21%36 mm47%18.5 kph
May8.4° / 18.6°27%47 mm50%16 kph
June14.2° / 25°29%48 mm55%14.8 kph
July17.6° / 27.6°28%47 mm63%14.4 kph
August17.4° / 26.5°28%48 mm66%14.4 kph
September12.7° / 21.3°29%53 mm62%16.1 kph
October4.9° / 13°27%51 mm55%18.3 kph
November-1.3° / 5.6°18%38 mm45%20.1 kph
December-6.9° / -0.9°12%24 mm39%21.7 kph

Feels-like temperatures from long-term historical data; ☀ marks the most comfortable months (mild temperatures, low rain).

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