St. John's, Canada Climate & Monthly Averages
The climate of St. John's
St. John's has a humid continental climate, marked by warm summers and cold, often snowy winters. Average daytime highs range from about 33°F (0°C) in February to around 68°F (20°C) in August, and the city records roughly 158 days of measurable precipitation a year.
Climate quick facts
- Hottest month: August - highs near 68°F (20°C)
- Coldest month: February - highs near 33°F (0°C)
- Record high: 83°F (28°C) · Record low: 2°F (-16°C) (2015–2024)
- Wettest month: January (16 rainy days) · Sunniest: July (9.0 h sun/day)
- Climate type: humid continental - warm summers and cold, often snowy winters
- Snow: about 42 days a year
Temperatures through the year
The warmest stretch of the year centers on August. Highs average 68°F (20°C) and overnight lows stay near 58°F (14°C). The coolest month is February, with typical highs of 33°F (0°C) and lows around 21°F (-6°C). Based on 2015–2024 weather data, temperatures have reached as high as 83°F (28°C) and dropped as low as 2°F (-16°C).
Rain, sun and snow
January is usually the wettest month. It brings about 6.1 inches (156 mm) of rain over 16 days, while July is the driest. July brings the most sunshine, averaging 9.0 hours of sun a day. Snow falls on about 42 days in a typical year, mostly from November through May.
Monthly climate table
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 33° | 23° | 16 | 6.1 in | 3.9 h/day | 81% |
| February | 33° | 21° | 14 | 5.0 in | 4.8 h/day | 77% |
| March | 35° | 24° | 14 | 5.0 in | 6.5 h/day | 79% |
| April | 41° | 31° | 14 | 4.8 in | 6.6 h/day | 82% |
| May | 49° | 36° | 12 | 3.6 in | 8.6 h/day | 82% |
| June | 58° | 46° | 13 | 4.2 in | 7.8 h/day | 85% |
| July | 66° | 54° | 12 | 3.6 in | 9.0 h/day | 86% |
| August | 68° | 58° | 11 | 3.7 in | 8.9 h/day | 83% |
| September | 62° | 52° | 12 | 4.7 in | 7.2 h/day | 82% |
| October | 53° | 44° | 12 | 3.9 in | 5.6 h/day | 81% |
| November | 45° | 36° | 14 | 6.1 in | 3.9 h/day | 81% |
| December | 37° | 28° | 14 | 5.0 in | 3.2 h/day | 80% |
St. John's month by month
St. John's weather in January
January brings highs around 33°F (1°C), lows near 23°F (-5°C), about 16 wet days and roughly 10 snowy days - typically the wettest month of the year in St. John's.
St. John's weather in February
February brings highs around 33°F (0°C), lows near 21°F (-6°C), about 14 wet days and roughly 9 snowy days - typically the coldest month of the year in St. John's.
St. John's weather in March
March brings highs around 35°F (2°C), lows near 24°F (-4°C), about 14 wet days and roughly 8 snowy days.
St. John's weather in April
April brings highs around 41°F (5°C), lows near 31°F (-1°C), about 14 wet days and roughly 4 snowy days.
St. John's weather in May
May brings highs around 49°F (9°C), lows near 36°F (2°C), about 12 wet days and roughly 1 snowy days.
St. John's weather in June
June brings highs around 58°F (14°C), lows near 46°F (8°C), about 13 wet days.
St. John's weather in July
July brings highs around 66°F (19°C), lows near 54°F (12°C), about 12 wet days - typically the driest month and the sunniest month of the year in St. John's.
St. John's weather in August
August brings highs around 68°F (20°C), lows near 58°F (14°C), about 11 wet days - typically the hottest month of the year in St. John's.
St. John's weather in September
September brings highs around 62°F (17°C), lows near 52°F (11°C), about 12 wet days.
St. John's weather in October
October brings highs around 53°F (12°C), lows near 44°F (7°C), about 12 wet days.
St. John's weather in November
November brings highs around 45°F (7°C), lows near 36°F (2°C), about 14 wet days and roughly 3 snowy days.
St. John's weather in December
December brings highs around 37°F (3°C), lows near 28°F (-2°C), about 14 wet days and roughly 7 snowy days.
Seasons in St. John's
Spring (March through May)
Spring in St. John's is brisk and cold, with daytime highs averaging 41°F (5°C) and nights around 30°F (-1°C); expect showers on roughly 40 days across the season, plus around 13 snowy days.
Summer (June through August)
Summer in St. John's stays on the cool side of mild, with daytime highs averaging 64°F (18°C) and nights around 53°F (11°C); expect showers on roughly 36 days across the season.
Fall (September through November)
Fall in St. John's runs cold, with daytime highs averaging 53°F (12°C) and nights around 44°F (7°C); expect showers on roughly 39 days across the season, plus around 3 snowy days.
Winter (December through February)
Winter in St. John's is bitterly cold, with daytime highs averaging 34°F (1°C) and nights around 24°F (-4°C); expect showers on roughly 44 days across the season, plus around 26 snowy days. Wind makes those temperatures feel harsher than they sound - pair the forecast winds with the wind speed converter to judge conditions on exposed skin.
Climate questions, answered
What is the average temperature in St. John's?
Is St. John's hot in summer?
Is St. John's cold in winter?
How many rainy days does St. John's get in a year?
Best time to visit St. John's
The best time to visit St. John's is generally June to October, when this window offers the warmest, brightest days of the year. Daytime temperatures in that window typically sit near 61°F (16°C).
Pack for St. John's with a heavy insulated coat, hat and gloves for winter; a compact umbrella or rain shell - showers are a regular feature. Evenings can feel noticeably cooler than afternoons - August nights average 58°F (14°C).
St. John's temperature records (2015-2024)
Derived from ERA5 reanalysis data, 2015–2024. Official station records may differ.