Climate averages 1991–2020
Dartmouth weather
in October.
A cool, wet month: the 6th warmest and the 10th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
October is a cool month in Dartmouth: daytime highs average 13.5°C and nights cool to about 8.0°C. By daytime temperature it is the 6th warmest of the 12 months.
Expect about 124 mm of rain on roughly 11 days, which makes October a wet month (the 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 01 min on an average October day.
The nearest other city in this atlas is Halifax (3 km away). In October its highs average 13.2°C, about as warm as Dartmouth, with 124 mm of rain.
Among the 86 cities listed in Canada, Dartmouth ranks joint 28th of 86 for the warmest October highs and joint 70th of 86 for the driest October (rainfall, lowest first). The mean October high of those 86 cities is 12.7°C; Dartmouth is 0.9°C warmer than that mean.
From October to November, average highs fall by 5.6°C to 7.9°C, and monthly rainfall rises from 124 mm to 129 mm.
The annual picture
October 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 | 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, selected | 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
October in nearby cities
- Halifax in OctoberCanada · 3 kmHigh 13.2°C · Low 8.6°C · 124 mm rain
- Moncton in OctoberCanada · 185 kmHigh 12.6°C · Low 5.5°C · 98 mm rain
- Saint John in OctoberCanada · 206 kmHigh 12.3°C · Low 6.6°C · 133 mm rain
- Sydney, Canada in OctoberCanada · 311 kmHigh 12.6°C · Low 8.2°C · 131 mm rain
- Québec in OctoberCanada · 638 kmHigh 11.3°C · Low 4.1°C · 125 mm rain
- Lynn in OctoberUnited States · 642 kmHigh 15.2°C · Low 9.1°C · 109 mm rain
- Lawrence (Massachusetts), United States in OctoberUnited States · 648 kmHigh 15.9°C · Low 7.9°C · 96 mm rain
- Boston in OctoberUnited States · 656 kmHigh 16.0°C · Low 8.1°C · 108 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.