St. John's Weather in May
What's the weather like in St. John's (Newfoundland and Labrador) in May 2025?
The climate in St. John's during May can be summarized as cool and damp.
May is in the spring in St. John's and is typically the 6th warmest month of the year. Daytime maximum temperatures average around a cool 10°C (51°F), whilst at night 2°C (35°F) is normal.
| Daytime temperature | 10.4°C 50.7°F |
|---|---|
| Nightly temperature | 1.6°C 34.9°F |
| Average temperature | 6°C 42.8°F |
| Daily sunshine | 5.6 hrs |
| Avg rainfall | 102 mm 4 ins |
| Rainy days | 16 days |
| Sea temperature | 2.8°C 37°F |
| Humidity | 82% |
| Windspeed | 22.3kph 14 mph |
On average May is the 3rd driest month of the year in St. John's with around 102mm 4 inches of rain making it a damp time to visit. This rainfall is typically spread over 16 days, although this may vary considerably.
On the flip side this corresponds to an average of 5.6 hours of sunshine per day.
May temperatures in St. John's
May rainfall
May hourly sunshine
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in St. John's in May 2025.
Other monthly averages
St. John's weather stats
| Hottest month: | July | 20.1°C 68.2°F |
|---|---|---|
| Driest month: | July | 75mm 3ins |
| Sunniest month: | July | 7.7hrs |
| Coldest month: | February | -1.4°C 29.5°F |
| Wettest month: | January | 155mm 6.1ins |
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