Climate averages 1991–2020
Saint John weather
in March.
A cold month with heavy precipitation: the 9th warmest and the joint 8th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
March is a cold month in Saint John: daytime highs average 1.9°C and nights cool to about -4.9°C. By daytime temperature it is the 9th warmest of the 12 months.
Expect about 112 mm of precipitation on roughly 11 days, which makes March a month with heavy precipitation (the joint 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 53 min on an average March day.
The nearest other city in this atlas is Moncton (134 km away). In March its highs average 1.8°C, about as warm as Saint John, with 98 mm of precipitation.
Among the 86 cities listed in Canada, Saint John ranks joint 68th of 86 for the warmest March highs and 74th of 86 for the driest March (precipitation, lowest first). The mean March high of those 86 cities is 3.8°C; Saint John is 1.9°C cooler than that mean.
From March to April, average highs rise by 5.5°C to 7.4°C, and monthly precipitation falls from 112 mm to 105 mm.
The annual picture
March 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 | -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, selected | 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
March in nearby cities
- Moncton in MarchCanada · 134 kmHigh 1.8°C · Low -6.9°C · 98 mm precipitation
- Dartmouth in MarchCanada · 206 kmHigh 3.0°C · Low -4.0°C · 108 mm rain
- Halifax in MarchCanada · 207 kmHigh 2.5°C · Low -3.7°C · 108 mm rain
- Québec in MarchCanada · 433 kmHigh 0.8°C · Low -8.2°C · 81 mm precipitation
- Sherbrooke in MarchCanada · 457 kmHigh 2.2°C · Low -7.6°C · 79 mm rain
- Sydney, Canada in MarchCanada · 466 kmHigh 1.3°C · Low -5.0°C · 108 mm precipitation
- Lawrence (Massachusetts), United States in MarchUnited States · 498 kmHigh 6.7°C · Low -2.6°C · 104 mm rain
- Manchester, United States in MarchUnited States · 499 kmHigh 5.9°C · Low -3.8°C · 100 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 Saint John) is explained once on the Saint John year overview and on the Sources, method and limits page.