Greater Sudbury Climate by Month
Greater Sudbury, Ontario, Canada
Warm summers and bitterly cold winters, with rain spread through the year.
The climate in Greater Sudbury is one of warm summers and bitterly cold winters, with rain spread through the year. Afternoon highs range from 20°F (-7°C) in January to 81°F (27°C) in July, and January nights average 1°F (-17°C). It gets 33 in (847 mm) of rain a year, spread across the months. The air is humid, averaging 78% relative humidity.
- Warmest month
- 81°F(27°C)
- Average high, July
- Coldest nights
- 1°F(-17°C)
- Average low, January
- Rain per year
- 33 in(847 mm)
- No clear rainy season
- Humidity
- 78%
- Sunniest: June
Best and worst months in Greater Sudbury
Best for weatherJune and August are the best time for weather in Greater Sudbury: highs near 77°F (25°C) and about 3.4 in (86 mm) of rain a month.
Least pleasantJanuary is the least pleasant month: it's the coldest, with highs of only 20°F (-7°C).
Comfort combines how close the afternoon high is to 75°F (24°C) with how much rain falls and how humid it is. See where the weather is best in June.
Temperature and rain through the year
Highs and lows (°F)
Average highAverage low
Rain (in per month)
Greater Sudbury weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 20°F(-7°C) | 1°F(-17°C) | 1.8 in(46 mm) | 100% | 1.3 |
| FebFebruary | 24°F(-5°C) | 2°F(-17°C) | 1.7 in(43 mm) | 100% | 2.3 |
| MarMarch | 35°F(2°C) | 13°F(-11°C) | 1.7 in(42 mm) | 69% | 3.5 |
| AprApril | 49°F(10°C) | 29°F(-2°C) | 2.3 in(58 mm) | 61% | 4.5 |
| MayMay | 65°F(18°C) | 42°F(6°C) | 3.1 in(78 mm) | 57% | 5.4 |
| JunJuneBest | 76°F(25°C) | 53°F(12°C) | 3.2 in(82 mm) | 62% | 5.9 |
| JulJuly | 81°F(27°C) | 58°F(14°C) | 3.0 in(76 mm) | 66% | 5.8 |
| AugAugustBest | 78°F(26°C) | 56°F(13°C) | 3.5 in(89 mm) | 71% | 4.9 |
| SepSeptember | 69°F(20°C) | 48°F(9°C) | 4.2 in(106 mm) | 78% | 3.7 |
| OctOctober | 54°F(12°C) | 37°F(3°C) | 3.9 in(99 mm) | 77% | 2.1 |
| NovNovember | 40°F(4°C) | 26°F(-3°C) | 2.8 in(72 mm) | 96% | 1.2 |
| DecDecember | 26°F(-3°C) | 12°F(-11°C) | 2.2 in(56 mm) | 100% | 1.0 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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