Climate averages 1991–2020
Saint John weather
in January.
A freezing month with heavy precipitation: the coolest and the joint 8th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
January is a freezing month in Saint John: daytime highs average -2.6°C and nights cool to about -10.2°C. By daytime temperature it is the coolest month of the year.
Expect about 112 mm of precipitation on roughly 12 days, which makes January a month with heavy precipitation (the joint 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 9 h 10 min on an average January day.
The nearest other city in this atlas is Moncton (134 km away). In January its highs average -3.5°C, 1.0°C cooler than Saint John, with 93 mm of precipitation.
Among the 86 cities listed in Canada, Saint John ranks joint 47th of 86 for the warmest January highs and 71st of 86 for the driest January (precipitation, lowest first). The mean January high of those 86 cities is -2.3°C; Saint John is 0.2°C cooler than that mean.
From January to February, average highs rise by 0.8°C to -1.7°C, and monthly precipitation falls from 112 mm to 96 mm.
The annual picture
January 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
Saint John climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January, selected | -2.6°C-10.2°C | -10.2°C | 112 | 11.6 | 9.29 h |
| February | -1.7°C-9.1°C | -9.1°C | 96 | 10.3 | 10.410 h |
| March | 1.9°C-4.9°C | -4.9°C | 112 | 11.4 | 11.912 h |
| April | 7.4°C0.7°C | 0.7°C | 105 | 12.3 | 13.513 h |
| May | 13.4°C6.1°C | 6.1°C | 104 | 12.3 | 14.815 h |
| June | 17.8°C11.0°C | 11.0°C | 108 | 12.1 | 15.616 h |
| July | 20.8°C14.6°C | 14.6°C | 91 | 11.0 | 15.315 h |
| August | 21.0°C14.9°C | 14.9°C | 80 | 9.3 | 14.114 h |
| September | 17.8°C11.8°C | 11.8°C | 108 | 10.0 | 12.613 h |
| October | 12.3°C6.6°C | 6.6°C | 133 | 10.9 | 11.011 h |
| November | 6.7°C1.0°C | 1.0°C | 128 | 11.8 | 9.610 h |
| December | 1.2°C-5.3°C | -5.3°C | 137 | 13.1 | 8.89 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
January in nearby cities
- Moncton in JanuaryCanada · 134 kmHigh -3.5°C · Low -12.8°C · 93 mm precipitation
- Dartmouth in JanuaryCanada · 206 kmHigh -0.5°C · Low -7.9°C · 111 mm precipitation
- Halifax in JanuaryCanada · 207 kmHigh -0.4°C · Low -7.1°C · 111 mm precipitation
- Québec in JanuaryCanada · 433 kmHigh -7.0°C · Low -15.9°C · 83 mm precipitation
- Sherbrooke in JanuaryCanada · 457 kmHigh -4.7°C · Low -14.5°C · 76 mm precipitation
- Sydney, Canada in JanuaryCanada · 466 kmHigh -0.7°C · Low -6.9°C · 118 mm precipitation
- Lawrence (Massachusetts), United States in JanuaryUnited States · 498 kmHigh 1.0°C · Low -7.6°C · 80 mm precipitation
- Manchester, United States in JanuaryUnited States · 499 kmHigh -0.2°C · Low -9.1°C · 78 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 Saint John) is explained once on the Saint John year overview and on the Sources, method and limits page.