July
OK
19.1°C / 12.7°C
17 rain days
mild, very wet
- comfortable temperatures (avg high 19.1°C / 66°F)
Best time to visit St. John's
St. John's, Canada — ranked month by month from data: temperature, rainfall, snow, and peak hazard seasons. Every month has trade-offs — pick what you can tolerate.
Best · July & August
About St. John's
St. John's is the capital and largest city of the Canadian province of Newfoundland and Labrador. It is located on the eastern tip of the Avalon Peninsula on the island of Newfoundland.
— condensed from Wikipedia ("St. John's, Newfoundland and Labrador")
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OK — shoulder months
August
OK
19.8°C / 14.2°C
18 rain days
mild, very wet
- comfortable temperatures (avg high 19.8°C / 68°F)
- warm evenings without humidity overload
September
OK
16.6°C / 10.9°C
18 rain days
mild, very wet
June
OK
14.2°C / 7.5°C
18 rain days
cool, very wet
October
OK
11.6°C / 6.5°C
18 rain days
cool, very wet
May
OK
9.2°C / 2.5°C
17 rain days
chilly, very wet
Months to skip
November
Skip
7°C / 1.7°C
20 rain days
chilly, very wet
- extremely wet (20 rain days)
April
Skip
4.9°C / -0.8°C
19 rain days
cold, freezing nights, very wet
- freezing at night (-0.8°C)
- extremely wet (19 rain days)
December
Skip
2.5°C / -2.1°C
19 rain days
cold, freezing nights, very wet
- freezing at night (-2.1°C)
- extremely wet (19 rain days)
March
Skip
1.3°C / -4.4°C
20 rain days
cold, freezing nights, very wet
- freezing at night (-4.4°C)
- extremely wet (20 rain days)
January
Skip
0.9°C / -4.8°C
22 rain days
cold, freezing nights, very wet
- freezing at night (-4.8°C)
- extremely wet (22 rain days)
February
Skip
0°C / -6.4°C
19 rain days
cold, freezing nights, very wet
- bitterly cold (overnight -6.4°C)
- extremely wet (19 rain days)
How we ranked these
Each month is scored on temperature comfort (18–27°C avg high is the sweet spot), rainfall (more rain days = lower score), snow days, and peak hazard seasons (hurricanes, monsoons, etc.). Green-tier months are within ideal range with no major issues. Yellow are workable but with trade-offs. Red has at least one significant problem — extreme heat or cold, heavy rain, or peak storm season.