St. John's, Canada Climate & Monthly Averages
St. John's has a humid continental climate. August is the hottest month, averaging 68° by day; February is the coldest at 33°.
Winter sets the pace in 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.
August
68° by day 58° at nightFebruary
33° by day 21° at nightThe cold-weather pattern in numbers
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.
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.
More climate facts for St. John's
- 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%
From snow season to the warmest stretch 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.
The coldest and warmest values in the dataset
Derived from ERA5 reanalysis data, 2015–2024. Official station records may differ. Need another precipitation unit? Use the rainfall converter.
Planning around winter in St. John's
The easier weather window
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.
Cold-weather packing
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).
Monthly highs, lows and seasonal change
| Month | High | Low | Rain days | Precipitation | Sunshine | Daylight | Wet-day chance | Humidity |
|---|---|---|---|---|---|---|---|---|
| January | 33° | 23° | 16 | 6.1 in | 3.9 h/day | 8.8 h | 51% | 81% |
| February | 33° | 21° | 14 | 5.0 in | 4.8 h/day | 10.2 h | 49% | 77% |
| March | 35° | 24° | 14 | 5.0 in | 6.5 h/day | 11.8 h | 45% | 79% |
| April | 41° | 31° | 14 | 4.8 in | 6.6 h/day | 13.6 h | 46% | 82% |
| May | 49° | 36° | 12 | 3.6 in | 8.6 h/day | 15.1 h | 38% | 82% |
| June | 58° | 46° | 13 | 4.2 in | 7.8 h/day | 16.0 h | 43% | 85% |
| July | 66° | 54° | 12 | 3.6 in | 9.0 h/day | 15.6 h | 38% | 86% |
| August | 68° | 58° | 11 | 3.7 in | 8.9 h/day | 14.3 h | 36% | 83% |
| September | 62° | 52° | 12 | 4.7 in | 7.2 h/day | 12.5 h | 40% | 82% |
| October | 53° | 44° | 12 | 3.9 in | 5.6 h/day | 10.7 h | 39% | 81% |
| November | 45° | 36° | 14 | 6.1 in | 3.9 h/day | 9.2 h | 48% | 81% |
| December | 37° | 28° | 14 | 5.0 in | 3.2 h/day | 8.4 h | 46% | 80% |
The route from winter to summer, month by month
Each card shows the average high and low. The bar places that month between St. John's's coldest night and warmest afternoon.
January
- Rain
- 16 days
- Sunshine
- 3.9 h
- Daylight
- 8.8 h
- Snow
- 10 days
February
- Rain
- 14 days
- Sunshine
- 4.8 h
- Daylight
- 10.2 h
- Snow
- 9 days
March
- Rain
- 14 days
- Sunshine
- 6.5 h
- Daylight
- 11.8 h
- Snow
- 8 days
April
- Rain
- 14 days
- Sunshine
- 6.6 h
- Daylight
- 13.6 h
- Snow
- 4 days
May
- Rain
- 12 days
- Sunshine
- 8.6 h
- Daylight
- 15.1 h
- Snow
- 1 day
June
- Rain
- 13 days
- Sunshine
- 7.8 h
- Daylight
- 16.0 h
July
- Rain
- 12 days
- Sunshine
- 9.0 h
- Daylight
- 15.6 h
August
- Rain
- 11 days
- Sunshine
- 8.9 h
- Daylight
- 14.3 h
September
- Rain
- 12 days
- Sunshine
- 7.2 h
- Daylight
- 12.5 h
October
- Rain
- 12 days
- Sunshine
- 5.6 h
- Daylight
- 10.7 h
November
- Rain
- 14 days
- Sunshine
- 3.9 h
- Daylight
- 9.2 h
- Snow
- 3 days
December
- Rain
- 14 days
- Sunshine
- 3.2 h
- Daylight
- 8.4 h
- Snow
- 7 days
Looking for warmer alternatives? Browse warm places by month, or compare St. John's's coolest part of the year: February, January, March.
Where St. John's sits among other climates
- St. John's averages 43°F (6°C) across the year - cooler than almost every other city we track.
These comparisons use the same ten-year window for every city in the dataset.