Climate averages 1991–2020
Greater Sudbury weather
in August.
A warm, wet month: the 2nd warmest and the 10th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a warm month in Greater Sudbury: daytime highs average 23.0°C and nights cool to about 14.4°C. By daytime temperature it is the 2nd warmest of the 12 months.
Expect about 90 mm of rain on roughly 11 days, which makes August a wet month (the 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 11 min on an average August day.
The nearest other city in this atlas is Barrie (254 km away). In August its highs average 23.8°C, 0.7°C warmer than Greater Sudbury, with 84 mm of rain.
Among the 86 cities listed in Canada, Greater Sudbury ranks joint 62nd of 86 for the warmest August highs and joint 64th of 86 for the driest August (rainfall, lowest first). The mean August high of those 86 cities is 23.8°C; Greater Sudbury is 0.7°C cooler than that mean.
From August to September, average highs fall by 4.5°C to 18.6°C, and monthly rainfall rises from 90 mm to 92 mm.
The annual picture
August in context
Monthly precipitation
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Greater Sudbury climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | -7.4°C-16.7°C | -16.7°C | 53 | 10.1 | 9.09 h |
| February | -5.7°C-15.2°C | -15.2°C | 41 | 7.7 | 10.310 h |
| March | 0.4°C-9.4°C | -9.4°C | 50 | 7.8 | 11.912 h |
| April | 8.2°C-2.0°C | -2.0°C | 70 | 9.8 | 13.514 h |
| May | 16.8°C5.8°C | 5.8°C | 72 | 10.6 | 15.015 h |
| June | 22.1°C12.1°C | 12.1°C | 81 | 10.7 | 15.716 h |
| July | 24.2°C15.0°C | 15.0°C | 87 | 10.7 | 15.415 h |
| August, selected | 23.0°C14.4°C | 14.4°C | 90 | 11.2 | 14.214 h |
| September | 18.6°C10.5°C | 10.5°C | 92 | 11.0 | 12.613 h |
| October | 10.9°C3.9°C | 3.9°C | 94 | 12.7 | 10.911 h |
| November | 3.3°C-3.4°C | -3.4°C | 73 | 11.0 | 9.59 h |
| December | -3.4°C-11.4°C | -11.4°C | 59 | 11.1 | 8.79 h |
Precipitation (rain or snow, as water) is the average of the 30 separate monthly totals. A wet day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
August in nearby cities
- Barrie in AugustCanada · 254 kmHigh 23.8°C · Low 15.9°C · 84 mm rain
- Sault Ste. Marie in AugustCanada · 256 kmHigh 22.8°C · Low 15.5°C · 95 mm rain
- Newmarket in AugustCanada · 296 kmHigh 24.7°C · Low 15.9°C · 78 mm rain
- Caledon in AugustCanada · 302 kmHigh 23.7°C · Low 14.8°C · 74 mm rain
- Richmond Hill in AugustCanada · 316 kmHigh 24.8°C · Low 16.3°C · 65 mm rain
- Vaughan in AugustCanada · 317 kmHigh 24.8°C · Low 16.5°C · 65 mm rain
- Peterborough, Canada in AugustCanada · 321 kmHigh 24.7°C · Low 16.4°C · 85 mm rain
- Markham in AugustCanada · 321 kmHigh 24.9°C · Low 16.9°C · 67 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Greater Sudbury) is explained once on the Greater Sudbury year overview and on the Sources, method and limits page.