Climate averages 1991–2020
St. John's weather
in July.
A mild, moderately wet month: the 2nd warmest and the 3rd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
July is a mild month in St. John's: daytime highs average 18.9°C and nights cool to about 12.2°C. By daytime temperature it is the 2nd warmest of the 12 months.
Expect about 78 mm of rain on roughly 11 days, which makes July a moderately wet month (the 3rd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 15 h 34 min on an average July day.
The nearest other city in this atlas is Sydney, Canada (590 km away). In July its highs average 21.5°C, 2.7°C warmer than St. John's, with 85 mm of rain.
Among the 86 cities listed in Canada, St. John's ranks 86th of 86 for the warmest July highs and 36th of 86 for the driest July (rainfall, lowest first). The mean July high of those 86 cities is 24.4°C; St. John's is 5.5°C cooler than that mean.
From July to August, average highs rise by 0.7°C to 19.6°C, and monthly rainfall rises from 78 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
St. John's climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | -0.1°C-5.8°C | -5.8°C | 124 | 14.4 | 8.99 h |
| February | -0.5°C-6.4°C | -6.4°C | 103 | 12.9 | 10.210 h |
| March | 1.1°C-4.3°C | -4.3°C | 105 | 12.8 | 11.912 h |
| April | 4.7°C-0.6°C | -0.6°C | 87 | 12.2 | 13.614 h |
| May | 9.1°C2.6°C | 2.6°C | 72 | 11.1 | 15.115 h |
| June | 13.7°C7.0°C | 7.0°C | 66 | 10.6 | 15.916 h |
| July, selected | 18.9°C12.2°C | 12.2°C | 78 | 10.5 | 15.616 h |
| August | 19.6°C13.7°C | 13.7°C | 80 | 10.4 | 14.314 h |
| September | 16.3°C10.7°C | 10.7°C | 93 | 10.7 | 12.613 h |
| October | 11.1°C6.5°C | 6.5°C | 105 | 12.5 | 10.911 h |
| November | 6.8°C2.3°C | 2.3°C | 110 | 13.6 | 9.49 h |
| December | 2.5°C-2.0°C | -2.0°C | 127 | 15.3 | 8.59 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
- Sydney, Canada in JulyCanada · 590 kmHigh 21.5°C · Low 15.3°C · 85 mm rain
- Dartmouth in JulyCanada · 896 kmHigh 22.2°C · Low 15.8°C · 90 mm rain
- Halifax in JulyCanada · 898 kmHigh 20.7°C · Low 15.7°C · 90 mm rain
- Moncton in JulyCanada · 933 kmHigh 24.1°C · Low 15.6°C · 82 mm rain
- Saint John in JulyCanada · 1053 kmHigh 20.8°C · Low 14.6°C · 91 mm rain
- Saguenay in JulyCanada · 1366 kmHigh 22.7°C · Low 13.5°C · 131 mm rain
- Québec in JulyCanada · 1398 kmHigh 24.3°C · Low 15.6°C · 120 mm rain
- Sherbrooke in JulyCanada · 1485 kmHigh 24.0°C · Low 15.5°C · 126 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 St. John's) is explained once on the St. John's year overview and on the Sources, method and limits page.