Climate averages 1991–2020
Dartmouth weather
in July.
A warm, wet month: the 2nd warmest and the 2nd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
July is a warm month in Dartmouth: daytime highs average 22.2°C and nights cool to about 15.8°C. By daytime temperature it is the 2nd warmest of the 12 months.
Expect about 90 mm of rain on roughly 10 days, which makes July a wet month (the 2nd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 15 h 12 min on an average July day.
The nearest other city in this atlas is Halifax (3 km away). In July its highs average 20.7°C, 1.5°C cooler than Dartmouth, with 90 mm of rain.
Among the 86 cities listed in Canada, Dartmouth ranks joint 73rd of 86 for the warmest July highs and joint 62nd of 86 for the driest July (rainfall, lowest first). The mean July high of those 86 cities is 24.4°C; Dartmouth is 2.2°C cooler than that mean.
From July to August, average highs rise by 0.3°C to 22.5°C, and monthly rainfall rises from 90 mm to 91 mm.
The annual picture
July 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
Dartmouth climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | -0.5°C-7.9°C | -7.9°C | 111 | 11.5 | 9.29 h |
| February | -0.1°C-7.7°C | -7.7°C | 101 | 10.5 | 10.410 h |
| March | 3.0°C-4.0°C | -4.0°C | 108 | 12.0 | 11.912 h |
| April | 8.1°C1.1°C | 1.1°C | 92 | 12.1 | 13.413 h |
| May | 13.6°C6.0°C | 6.0°C | 83 | 11.2 | 14.815 h |
| June | 18.4°C11.2°C | 11.2°C | 98 | 11.7 | 15.516 h |
| July, selected | 22.2°C15.8°C | 15.8°C | 90 | 10.3 | 15.215 h |
| August | 22.5°C16.4°C | 16.4°C | 91 | 10.2 | 14.114 h |
| September | 19.3°C13.3°C | 13.3°C | 97 | 9.4 | 12.613 h |
| October | 13.5°C8.0°C | 8.0°C | 124 | 10.6 | 11.011 h |
| November | 7.9°C2.6°C | 2.6°C | 129 | 11.1 | 9.610 h |
| December | 2.9°C-3.0°C | -3.0°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
July in nearby cities
- Halifax in JulyCanada · 3 kmHigh 20.7°C · Low 15.7°C · 90 mm rain
- Moncton in JulyCanada · 185 kmHigh 24.1°C · Low 15.6°C · 82 mm rain
- Saint John in JulyCanada · 206 kmHigh 20.8°C · Low 14.6°C · 91 mm rain
- Sydney, Canada in JulyCanada · 311 kmHigh 21.5°C · Low 15.3°C · 85 mm rain
- Québec in JulyCanada · 638 kmHigh 24.3°C · Low 15.6°C · 120 mm rain
- Lynn in JulyUnited States · 642 kmHigh 25.2°C · Low 18.6°C · 74 mm rain
- Lawrence (Massachusetts), United States in JulyUnited States · 648 kmHigh 27.8°C · Low 18.4°C · 82 mm rain
- Boston in JulyUnited States · 656 kmHigh 27.5°C · Low 18.4°C · 73 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 Dartmouth) is explained once on the Dartmouth year overview and on the Sources, method and limits page.
Halifax lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.