Climate averages 1991–2020
Moncton weather
in December.
A freezing month with heavy precipitation: the 10th warmest and the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a freezing month in Moncton: daytime highs average -0.1°C and nights cool to about -7.5°C. By daytime temperature it is the 10th warmest of the 12 months.
Expect about 112 mm of precipitation on roughly 12 days, which makes December a month with heavy precipitation (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 8 h 43 min on an average December day.
The nearest other city in this atlas is Saint John (134 km away). In December its highs average 1.2°C, 1.3°C warmer than Moncton, with 137 mm of precipitation.
Among the 86 cities listed in Canada, Moncton ranks joint 49th of 86 for the warmest December highs and 68th of 86 for the driest December (precipitation, lowest first). The mean December high of those 86 cities is 0.2°C; Moncton is 0.3°C cooler than that mean.
From December to January, average highs fall by 3.5°C to -3.5°C, and monthly precipitation falls from 112 mm to 93 mm.
The annual picture
December 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
Moncton climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | -3.5°C-12.8°C | -12.8°C | 93 | 11.4 | 9.19 h |
| February | -2.5°C-11.8°C | -11.8°C | 83 | 10.1 | 10.310 h |
| March | 1.8°C-6.9°C | -6.9°C | 98 | 11.5 | 11.912 h |
| April | 8.2°C-0.5°C | -0.5°C | 85 | 12.5 | 13.514 h |
| May | 15.3°C5.7°C | 5.7°C | 85 | 12.5 | 14.915 h |
| June | 20.5°C11.5°C | 11.5°C | 91 | 11.8 | 15.716 h |
| July | 24.1°C15.6°C | 15.6°C | 82 | 11.5 | 15.415 h |
| August | 23.6°C15.4°C | 15.4°C | 76 | 9.8 | 14.214 h |
| September | 19.4°C11.4°C | 11.4°C | 93 | 9.3 | 12.613 h |
| October | 12.6°C5.5°C | 5.5°C | 98 | 10.7 | 11.011 h |
| November | 5.9°C-0.4°C | -0.4°C | 98 | 10.7 | 9.510 h |
| December, selected | -0.1°C-7.5°C | -7.5°C | 112 | 12.2 | 8.79 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
December in nearby cities
- Saint John in DecemberCanada · 134 kmHigh 1.2°C · Low -5.3°C · 137 mm precipitation
- Dartmouth in DecemberCanada · 185 kmHigh 2.9°C · Low -3.0°C · 134 mm rain
- Halifax in DecemberCanada · 187 kmHigh 3.0°C · Low -2.5°C · 134 mm rain
- Sydney, Canada in DecemberCanada · 356 kmHigh 2.6°C · Low -2.1°C · 139 mm rain
- Québec in DecemberCanada · 498 kmHigh -3.2°C · Low -11.1°C · 101 mm precipitation
- Saguenay in DecemberCanada · 539 kmHigh -5.6°C · Low -13.8°C · 80 mm precipitation
- Sherbrooke in DecemberCanada · 556 kmHigh -1.3°C · Low -9.4°C · 92 mm precipitation
- Trois-Rivières in DecemberCanada · 597 kmHigh -2.4°C · Low -10.3°C · 90 mm precipitation
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 Moncton) is explained once on the Moncton year overview and on the Sources, method and limits page.