Weather in Siesta Key: January
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Average day temperature: | 66.9°F |
| Average night temperature: | 59.3°F | |
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Sea water temperature: | 64.7°F |
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Number of sunny days: | 14 days |
| Day length: | 10.5 - 10.9 hours | |
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Number of rainy days: | 0 days |
| Precipitation totals: | 0.4 in. | |
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forecast
| Siesta Key |
temperature
| Siesta Key |
Air temperature in January, °F
The highest day temperature during January of 2026 was 81°F. At the same time the lowest night temperature was 38°F. Daily and nightly averages during January were 68.9°F and 55.4°F.
Sea water temperature in Siesta Key in January, °F
The average sea water temperature in January of 2026 was 65.0°F. The highest and lowest sea temperatures during the month were 69.3°F and 59.7°F.
Mostly all days in January are sunny but cloudy days are also possible.
Precipitation total in January, in.
Precipitation total value in Siesta Key in January is 0.4 in. Other months of the year show relatively similar values.
The average wind speed value in January is 10.4 mph It makes January one of the most 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 January is: 6.7.
Best time for vacation in Siesta Key
Siesta Key on a weather map
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