Climate averages 1991–2020
Saint John weather
in July.
A mild, wet month: the 2nd warmest and the 2nd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
July is a mild month in Saint John: daytime highs average 20.8°C and nights cool to about 14.6°C. By daytime temperature it is the 2nd warmest of the 12 months.
Expect about 91 mm of rain on roughly 11 days, which makes July a wet month (the 2nd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 15 h 16 min on an average July day.
The nearest other city in this atlas is Moncton (134 km away). In July its highs average 24.1°C, 3.3°C warmer than Saint John, with 82 mm of rain.
Among the 86 cities listed in Canada, Saint John ranks 83rd of 86 for the warmest July highs and 64th of 86 for the driest July (rainfall, lowest first). The mean July high of those 86 cities is 24.4°C; Saint John is 3.6°C cooler than that mean.
From July to August, average highs rise by 0.2°C to 21.0°C, and monthly rainfall falls from 91 mm to 80 mm.
The annual picture
July 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 | 17.8°C11.0°C | 11.0°C | 108 | 12.1 | 15.616 h |
| July, selected | 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
July in nearby cities
- Moncton in JulyCanada · 134 kmHigh 24.1°C · Low 15.6°C · 82 mm rain
- Dartmouth in JulyCanada · 206 kmHigh 22.2°C · Low 15.8°C · 90 mm rain
- Halifax in JulyCanada · 207 kmHigh 20.7°C · Low 15.7°C · 90 mm rain
- Québec in JulyCanada · 433 kmHigh 24.3°C · Low 15.6°C · 120 mm rain
- Sherbrooke in JulyCanada · 457 kmHigh 24.0°C · Low 15.5°C · 126 mm rain
- Sydney, Canada in JulyCanada · 466 kmHigh 21.5°C · Low 15.3°C · 85 mm rain
- Lawrence (Massachusetts), United States in JulyUnited States · 498 kmHigh 27.8°C · Low 18.4°C · 82 mm rain
- Manchester, United States in JulyUnited States · 499 kmHigh 27.7°C · Low 17.6°C · 89 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.