Weather in Saint Louis: December
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Average day temperature: | 85.7°F |
| Average night temperature: | 71.9°F | |
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Sea water temperature: | 70.2°F |
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Number of sunny days: | 25 days |
| Day length: | 11.2 - 11.2 hours | |
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Number of rainy days: | 0 days |
| Precipitation totals: | 0.0 in. | |
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forecast
| Saint Louis |
temperature
| Saint Louis |
Air temperature in December, °F
The highest day temperature during December of 2025 was 81°F. At the same time the lowest night temperature was 64°F. Daily and nightly averages during December were 77.0°F and 69.3°F.
Sea water temperature in Saint Louis in December, °F
The average sea water temperature in December of 2025 was 68.1°F. The highest and lowest sea temperatures during the month were 72.9°F and 62.4°F.
Mostly all days in December are sunny but cloudy days are also possible.
Precipitation total in December, in.
Precipitation total value in Saint Louis in December is 0.0 in. Other months of the year show relatively similar values.
The average wind speed value in December is 13.5 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 December is: 9.0.
Best time for vacation in Saint Louis
Saint Louis on a weather map
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