Climate averages 1991–2020
Saint John weather
in June.
A mild, wet month: the joint 3rd warmest and the joint 6th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
June is a mild month in Saint John: daytime highs average 17.8°C and nights cool to about 11.0°C. By daytime temperature it is the joint 3rd warmest of the 12 months.
Expect about 108 mm of rain on roughly 12 days, which makes June a wet month (the joint 6th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 15 h 35 min on an average June day.
The nearest other city in this atlas is Moncton (134 km away). In June its highs average 20.5°C, 2.7°C warmer than Saint John, with 91 mm of rain.
Among the 86 cities listed in Canada, Saint John ranks 82nd of 86 for the warmest June highs and joint 76th of 86 for the driest June (rainfall, lowest first). The mean June high of those 86 cities is 21.4°C; Saint John is 3.6°C cooler than that mean.
From June to July, average highs rise by 3.0°C to 20.8°C, and monthly rainfall falls from 108 mm to 91 mm.
The annual picture
June 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 | 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, selected | 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
June in nearby cities
- Moncton in JuneCanada · 134 kmHigh 20.5°C · Low 11.5°C · 91 mm rain
- Dartmouth in JuneCanada · 206 kmHigh 18.4°C · Low 11.2°C · 98 mm rain
- Halifax in JuneCanada · 207 kmHigh 16.8°C · Low 11.0°C · 98 mm rain
- Québec in JuneCanada · 433 kmHigh 22.1°C · Low 12.6°C · 118 mm rain
- Sherbrooke in JuneCanada · 457 kmHigh 21.8°C · Low 12.5°C · 131 mm rain
- Sydney, Canada in JuneCanada · 466 kmHigh 16.8°C · Low 9.9°C · 89 mm rain
- Lawrence (Massachusetts), United States in JuneUnited States · 498 kmHigh 24.5°C · Low 15.0°C · 87 mm rain
- Manchester, United States in JuneUnited States · 499 kmHigh 24.5°C · Low 14.4°C · 91 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.