Weather in Saint Syr Sur Mer: May
| Average day temperature: | 67.8°F | |
| Average night temperature: | 58.2°F | |
| Sea water temperature: | 62.1°F | |
| Number of sunny days: | 21 days | |
| Day length: | 14.1 - 15.1 hours | |
| Number of rainy days: | 2 days | |
| Precipitation totals: | 1.6 in. | |
| more information | ||
forecast
| Saint Syr Sur Mer |
temperature
| Saint Syr Sur Mer |
Air temperature in May, °F
The highest day temperature during May of 2025 was 77°F. At the same time the lowest night temperature was 53°F. Daily and nightly averages during May were 68.1°F and 60.8°F.
Sea water temperature in Saint Syr Sur Mer in May, °F
The average sea water temperature in May of 2025 was 63.8°F. The highest and lowest sea temperatures during the month were 66.2°F and 61.3°F.
Mostly all days in May are sunny but cloudy days are also possible.
Precipitation total in May, in.
Precipitation total value in Saint Syr Sur Mer in May is 1.9 in. Other months of the year show relatively similar values.
The average wind speed value in May is 10.5 mph It makes May one of the least windy months of the year.
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: 10.4.
Best time for vacation in Saint Syr Sur Mer
Saint Syr Sur Mer on a weather map

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