Climate averages 1991–2020
Newmarket weather
in August.
A warm, moderately 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 Newmarket: daytime highs average 24.7°C and nights cool to about 15.9°C. By daytime temperature it is the 2nd warmest of the 12 months.
Expect about 78 mm of rain on roughly 10 days, which makes August a moderately wet month (the 9th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 01 min on an average August day.
The nearest other city in this atlas is Richmond Hill (20 km away). In August its highs average 24.8°C, about as warm as Newmarket, with 65 mm of rain.
Among the 86 cities listed in Canada, Newmarket ranks joint 24th of 86 for the warmest August highs and 49th of 86 for the driest August (rainfall, lowest first). The mean August high of those 86 cities is 23.8°C; Newmarket is 0.9°C warmer than that mean.
From August to September, average highs fall by 3.9°C to 20.8°C, and monthly rainfall falls from 78 mm to 73 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
Newmarket climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | -2.6°C-11.3°C | -11.3°C | 57 | 10.1 | 9.39 h |
| February | -1.6°C-11.3°C | -11.3°C | 47 | 8.0 | 10.410 h |
| March | 3.7°C-6.0°C | -6.0°C | 56 | 10.1 | 11.912 h |
| April | 11.0°C1.0°C | 1.0°C | 77 | 11.4 | 13.413 h |
| May | 18.4°C7.9°C | 7.9°C | 80 | 11.2 | 14.715 h |
| June | 23.4°C13.7°C | 13.7°C | 88 | 11.2 | 15.415 h |
| July | 25.8°C16.5°C | 16.5°C | 84 | 10.7 | 15.115 h |
| August, selected | 24.7°C15.9°C | 15.9°C | 78 | 9.6 | 14.014 h |
| September | 20.8°C12.2°C | 12.2°C | 73 | 9.1 | 12.613 h |
| October | 13.5°C6.0°C | 6.0°C | 75 | 11.0 | 11.011 h |
| November | 6.3°C-0.4°C | -0.4°C | 68 | 10.2 | 9.710 h |
| December | 0.5°C-6.4°C | -6.4°C | 57 | 9.9 | 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
- Richmond Hill in AugustCanada · 20 kmHigh 24.8°C · Low 16.3°C · 65 mm rain
- Vaughan in AugustCanada · 24 kmHigh 24.8°C · Low 16.5°C · 65 mm rain
- Markham in AugustCanada · 26 kmHigh 24.9°C · Low 16.9°C · 67 mm rain
- Thornhill in AugustCanada · 26 kmHigh 24.8°C · Low 17.2°C · 65 mm rain
- Pickering in AugustCanada · 31 kmHigh 24.1°C · Low 17.0°C · 84 mm rain
- Toronto in AugustCanada · 39 kmHigh 24.5°C · Low 17.6°C · 65 mm rain
- Ajax in AugustCanada · 41 kmHigh 24.8°C · Low 17.9°C · 67 mm rain
- Barrie in AugustCanada · 42 kmHigh 23.8°C · Low 15.9°C · 84 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 Newmarket) is explained once on the Newmarket year overview and on the Sources, method and limits page.