Weather in Saint John: May
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Average day temperature: | 59.1°F |
| Average night temperature: | 45.9°F | |
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Sea water temperature: | 44.8°F |
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Number of sunny days: | 8 days |
| Day length: | 14.3 - 15.4 hours | |
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Number of rainy days: | 1 day |
| Precipitation totals: | 0.9 in. | |
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forecast
| Saint John |
temperature
| Saint John |
Air temperature in May, °F
The highest day temperature during May of 2025 was 83°F. At the same time the lowest night temperature was 34°F. Daily and nightly averages during May were 57.8°F and 46.9°F.
Sea water temperature in Saint John in May, °F
The average sea water temperature in May of 2025 was 42.9°F. The highest and lowest sea temperatures during the month were 45.9°F and 40.3°F.
Mostly all days in May are cloudy but sunny and partly cloudy days are also possible.
Precipitation total in May, in.
Precipitation total value in Saint John in May is 0.9 in. Other months of the year show relatively similar values.
The average wind speed value in May is 7.4 mph
This chart shows average number of hours during the day when sunlight can reach the ground. It depends on day length and cloudiness during the day. The average number of sunny hours in May is: 6.5.
Best time for vacation in Saint John
Saint John on a weather map
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