Climate averages 1991–2020
Sault Ste. Marie weather
in August.
A warm, wet month: the 2nd warmest and the 9th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a warm month in Sault Ste. Marie: daytime highs average 22.8°C and nights cool to about 15.5°C. By daytime temperature it is the 2nd warmest of the 12 months.
Expect about 95 mm of rain on roughly 11 days, which makes August a wet month (the 9th 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 Greater Sudbury (256 km away). In August its highs average 23.0°C, about as warm as Sault Ste. Marie, with 90 mm of rain.
Among the 86 cities listed in Canada, Sault Ste. Marie ranks joint 65th of 86 for the warmest August highs and joint 72nd of 86 for the driest August (rainfall, lowest first). The mean August high of those 86 cities is 23.8°C; Sault Ste. Marie is 1.0°C cooler than that mean.
From August to September, average highs fall by 3.9°C to 18.8°C, and monthly rainfall rises from 95 mm to 108 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
Sault Ste. Marie climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | -6.5°C-13.1°C | -13.1°C | 46 | 10.2 | 9.09 h |
| February | -6.0°C-12.6°C | -12.6°C | 36 | 7.6 | 10.310 h |
| March | -0.5°C-7.6°C | -7.6°C | 46 | 8.3 | 11.912 h |
| April | 7.0°C-1.4°C | -1.4°C | 67 | 10.2 | 13.514 h |
| May | 15.4°C5.6°C | 5.6°C | 72 | 10.0 | 15.015 h |
| June | 21.0°C11.8°C | 11.8°C | 81 | 9.8 | 15.816 h |
| July | 23.3°C15.4°C | 15.4°C | 101 | 11.4 | 15.415 h |
| August, selected | 22.8°C15.5°C | 15.5°C | 95 | 10.9 | 14.214 h |
| September | 18.8°C12.0°C | 12.0°C | 108 | 12.1 | 12.613 h |
| October | 11.5°C5.5°C | 5.5°C | 101 | 13.7 | 10.911 h |
| November | 4.4°C-0.8°C | -0.8°C | 67 | 11.2 | 9.59 h |
| December | -1.7°C-7.7°C | -7.7°C | 56 | 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
- Greater Sudbury in AugustCanada · 256 kmHigh 23.0°C · Low 14.4°C · 90 mm rain
- Green Bay in AugustUnited States · 363 kmHigh 25.6°C · Low 17.3°C · 87 mm rain
- Flint in AugustUnited States · 393 kmHigh 25.9°C · Low 17.2°C · 76 mm rain
- Appleton in AugustUnited States · 405 kmHigh 25.3°C · Low 17.1°C · 85 mm rain
- Grand Rapids in AugustUnited States · 409 kmHigh 25.9°C · Low 17.4°C · 92 mm rain
- Wyoming in AugustUnited States · 415 kmHigh 25.8°C · Low 17.3°C · 92 mm rain
- Lansing in AugustUnited States · 421 kmHigh 26.0°C · Low 17.2°C · 84 mm rain
- Sarnia in AugustCanada · 422 kmHigh 25.2°C · Low 18.3°C · 70 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 Sault Ste. Marie) is explained once on the Sault Ste. Marie year overview and on the Sources, method and limits page.