Weather in Saint Malo: September
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Average day temperature: | 66.4°F |
| Average night temperature: | 58.1°F | |
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Sea water temperature: | 65.0°F |
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Number of sunny days: | 11 days |
| Day length: | 11.7 - 13.4 hours | |
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Number of rainy days: | 3 days |
| Precipitation totals: | 1.7 in. | |
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forecast
| Saint Malo |
temperature
| Saint Malo |
Air temperature in September, °F
The highest day temperature during September of 2025 was 78°F. At the same time the lowest night temperature was 51°F. Daily and nightly averages during September were 66.0°F and 57.1°F.
Sea water temperature in Saint Malo in September, °F
The average sea water temperature in September of 2025 was 65.2°F. The highest and lowest sea temperatures during the month were 67.5°F and 62.8°F.
Number of sunny, partly cloudy and cloudy days in September is almost equal.
Precipitation total in September, in.
Precipitation total value in Saint Malo in September is 1.8 in. Other months of the year show relatively similar values.
The average wind speed value in September is 11.6 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 September is: 6.6.
Best time for vacation in Saint Malo
Saint Malo on a weather map
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