St. John's, Canada Climate & Monthly Averages
The climate of St. John's
St. John's spends most of the year cold. August, the warmest month, averages 68°F (20°C) by day - a figure many cities in our dataset pass in early spring - while February holds at 33°F (0°C) with 158 wet days a year across the whole calendar.
Climate quick facts
- Hottest month: August - highs near 68°F (20°C)
- Coldest month: February - highs near 33°F (0°C)
- Decade extremes (2015-2024): 83°F (28°C) high · 2°F (-16°C) low
- Wettest month: January (16 rainy days) · Sunniest: July (9.0 h sun/day)
- Climate type: humid continental
- Annual swing: 20°C between the average warmest and coolest month · day to night: 6°C
- Snow: about 42 days a year
- Months with freezing average lows: 5
- Average humidity: 82%
Temperatures through the year
February is the coolest month, with highs of 33°F (0°C) and lows near 21°F (-6°C). August is the warm end of the year, averaging 68°F (20°C) by day and 58°F (14°C) overnight. Precipitation concentrates in January - 6.1 inches (156 mm) on 16 days - and thins out by July.
Rain, sun and snow
Snow falls on roughly 42 days a year, mostly November through May. Sunshine averages 6.3 hours a day over the year - duller than almost anywhere else we cover, peaking in July at 9.0 hours. Relative humidity averages 82% across the year, more humid than 92% of the 3496 cities in our dataset. Days and nights are about 6°C apart on average - narrower than all but 8% of the 3496 cities in our dataset. The gridded 2015-2024 daily record for this location tops out at 83°F (28°C) and bottoms at 2°F (-16°C) - decade extremes, not all-time station records.
How St. John's compares
- St. John's averages 43°F (6°C) across the year - cooler than almost every other city we track.
Ranked against every city in our dataset, each measured on the same ten-year window.
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 runs cold here - highs near 41°F (5°C), nights near 30°F (-1°C), and rain falls on around 40 of the 90 days, plus about 13 snowy days.
Summer (June through August)
Summer runs cool rather than cold here - highs near 64°F (18°C), nights near 53°F (11°C), and rain falls on around 36 of the 90 days.
Fall (September through November)
Fall is chilly here - highs near 53°F (12°C), nights near 44°F (7°C), and rain falls on around 39 of the 90 days, plus about 3 snowy days.
Winter (December through February)
Winter brings deep cold here - highs near 34°F (1°C), nights near 24°F (-4°C), and rain falls on around 44 of the 90 days, plus about 26 snowy days. Wind sharpens cold like this considerably; pair the forecast winds with the wind speed converter to judge exposed conditions.
Climate questions, answered
How hot does St. John's get in summer?
How warm is St. John's on average?
How much sun does St. John's get?
How cold does St. John's get in winter?
Are nights cold in St. John's?
Is St. John's humid?
Best time to visit St. John's
June to October is the sweet spot for St. John's - these are the warmest and brightest weeks of the year. Expect 61°F (16°C) in the afternoon and around 12 days of rain in a typical month of it. For the same question asked the other way round, see where else is warm in June.
Pack for St. John's with a heavy insulated coat, hat and gloves for winter and proper waterproofs rather than an umbrella - wet days are the norm here. Note the gap between afternoon and night: August pairs 68°F (20°C) with 58°F (14°C).
St. John's temperature records (2015-2024)
Derived from ERA5 reanalysis data, 2015–2024. Official station records may differ.