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 | 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% |
St. John's month by month
Average high and low for each month, with the bar showing where it sits in St. John's's year (left is the coldest night, right is the 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
Warmer places to go, by month: January · February · March · April · May · June · July · August · September · October · November · December
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. Need the precipitation in other units? The mm-to-inches rainfall converter handles it.