Climate averages 1991–2020
Halifax weather
in August.
A mild, wet month: the warmest and the 3rd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a mild month in Halifax: daytime highs average 21.4°C and nights cool to about 16.5°C. By daytime temperature it is the warmest month of the year.
Expect about 91 mm of rain on roughly 10 days, which makes August a wet month (the 3rd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 03 min on an average August day.
The nearest other city in this atlas is Dartmouth (3 km away). In August its highs average 22.5°C, 1.1°C warmer than Halifax, with 91 mm of rain.
Among the 86 cities listed in Canada, Halifax ranks joint 79th of 86 for the warmest August highs and joint 67th of 86 for the driest August (rainfall, lowest first). The mean August high of those 86 cities is 23.8°C; Halifax is 2.4°C cooler than that mean.
From August to September, average highs fall by 2.8°C to 18.6°C, and monthly rainfall rises from 91 mm to 97 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
Halifax climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | -0.4°C-7.1°C | -7.1°C | 111 | 11.5 | 9.29 h |
| February | -0.2°C-7.0°C | -7.0°C | 101 | 10.5 | 10.410 h |
| March | 2.5°C-3.7°C | -3.7°C | 108 | 12.0 | 11.912 h |
| April | 7.0°C1.1°C | 1.1°C | 92 | 12.1 | 13.413 h |
| May | 12.0°C5.8°C | 5.8°C | 83 | 11.2 | 14.815 h |
| June | 16.8°C11.0°C | 11.0°C | 98 | 11.7 | 15.516 h |
| July | 20.7°C15.7°C | 15.7°C | 90 | 10.3 | 15.215 h |
| August, selected | 21.4°C16.5°C | 16.5°C | 91 | 10.2 | 14.114 h |
| September | 18.6°C13.7°C | 13.7°C | 97 | 9.4 | 12.613 h |
| October | 13.2°C8.6°C | 8.6°C | 124 | 10.6 | 11.011 h |
| November | 7.9°C3.1°C | 3.1°C | 129 | 11.1 | 9.610 h |
| December | 3.0°C-2.5°C | -2.5°C | 134 | 13.3 | 8.99 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
- Dartmouth in AugustCanada · 3 kmHigh 22.5°C · Low 16.4°C · 91 mm rain
- Moncton in AugustCanada · 187 kmHigh 23.6°C · Low 15.4°C · 76 mm rain
- Saint John in AugustCanada · 207 kmHigh 21.0°C · Low 14.9°C · 80 mm rain
- Sydney, Canada in AugustCanada · 313 kmHigh 22.0°C · Low 16.4°C · 89 mm rain
- Québec in AugustCanada · 640 kmHigh 23.2°C · Low 14.7°C · 113 mm rain
- Lynn in AugustUnited States · 641 kmHigh 24.6°C · Low 18.3°C · 85 mm rain
- Lawrence (Massachusetts), United States in AugustUnited States · 647 kmHigh 26.9°C · Low 17.8°C · 84 mm rain
- Boston in AugustUnited States · 654 kmHigh 26.6°C · Low 17.9°C · 85 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 Halifax) is explained once on the Halifax year overview and on the Sources, method and limits page.
Dartmouth lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.