Climate averages 1991–2020
Richmond Hill weather
in August.
A warm, moderately wet month: the 2nd warmest and the 5th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a warm month in Richmond Hill: daytime highs average 24.8°C and nights cool to about 16.3°C. By daytime temperature it is the 2nd warmest of the 12 months.
Expect about 65 mm of rain on roughly 9 days, which makes August a moderately wet month (the 5th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 00 min on an average August day.
The nearest other city in this atlas is Vaughan (6 km away). In August its highs average 24.8°C, about as warm as Richmond Hill, with 65 mm of rain.
Among the 86 cities listed in Canada, Richmond Hill ranks joint 19th of 86 for the warmest August highs and joint 17th of 86 for the driest August (rainfall, lowest first). The mean August high of those 86 cities is 23.8°C; Richmond Hill is 1.0°C warmer than that mean.
From August to September, average highs fall by 3.9°C to 20.9°C, and monthly rainfall rises from 65 mm to 69 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
Richmond Hill climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | -2.0°C-10.1°C | -10.1°C | 60 | 10.2 | 9.39 h |
| February | -1.2°C-10.3°C | -10.3°C | 49 | 7.9 | 10.410 h |
| March | 3.8°C-5.3°C | -5.3°C | 57 | 9.5 | 11.912 h |
| April | 10.8°C1.2°C | 1.2°C | 77 | 10.7 | 13.413 h |
| May | 17.8°C7.9°C | 7.9°C | 72 | 10.1 | 14.715 h |
| June | 23.0°C13.7°C | 13.7°C | 77 | 10.6 | 15.415 h |
| July | 25.7°C16.7°C | 16.7°C | 71 | 9.6 | 15.115 h |
| August, selected | 24.8°C16.3°C | 16.3°C | 65 | 8.8 | 14.014 h |
| September | 20.9°C12.7°C | 12.7°C | 69 | 8.7 | 12.613 h |
| October | 13.7°C6.5°C | 6.5°C | 75 | 10.5 | 11.011 h |
| November | 6.7°C0.3°C | 0.3°C | 67 | 10.0 | 9.710 h |
| December | 1.1°C-5.3°C | -5.3°C | 61 | 10.0 | 9.09 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
- Vaughan in AugustCanada · 6 kmHigh 24.8°C · Low 16.5°C · 65 mm rain
- Thornhill in AugustCanada · 6 kmHigh 24.8°C · Low 17.2°C · 65 mm rain
- Markham in AugustCanada · 14 kmHigh 24.9°C · Low 16.9°C · 67 mm rain
- Toronto in AugustCanada · 19 kmHigh 24.5°C · Low 17.6°C · 65 mm rain
- Newmarket in AugustCanada · 20 kmHigh 24.7°C · Low 15.9°C · 78 mm rain
- Pickering in AugustCanada · 25 kmHigh 24.1°C · Low 17.0°C · 84 mm rain
- Etobicoke in AugustCanada · 27 kmHigh 25.0°C · Low 17.4°C · 65 mm rain
- Ajax in AugustCanada · 33 kmHigh 24.8°C · Low 17.9°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 Richmond Hill) is explained once on the Richmond Hill year overview and on the Sources, method and limits page.
Toronto, Etobicoke and Vaughan lie in the same rainfall cell, so their rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.