Weather in Rio Grande: December
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Average day temperature: | 74.5°F |
| Average night temperature: | 68.0°F | |
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Sea water temperature: | 74.6°F |
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Number of sunny days: | 10 days |
| Day length: | 14.1 - 14.3 hours | |
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Number of rainy days: | 2 days |
| Precipitation totals: | 1.3 in. | |
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forecast
| Rio Grande |
temperature
| Rio Grande |
Air temperature in December, °F
The highest day temperature during December of 2025 was 83°F. At the same time the lowest night temperature was 61°F. Daily and nightly averages during December were 76.2°F and 69.4°F.
Sea water temperature in Rio Grande in December, °F
The average sea water temperature in December of 2025 was 76.1°F. The highest and lowest sea temperatures during the month were 80.2°F and 72.7°F.
Mostly all days in December are partly cloudy but sunny or cloudy days are also possible.
Precipitation total in December, in.
Precipitation total value in Rio Grande in December is 1.3 in. Other months of the year show relatively similar values.
The average wind speed value in December is 12.8 mph It makes December 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 December is: 8.1.
Best time for vacation in Rio Grande
Rio Grande on a weather map
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