Weather in Niteroi: January
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Average day temperature: | 83.8°F |
| Average night temperature: | 75.1°F | |
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Sea water temperature: | 80.1°F |
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Number of sunny days: | 7 days |
| Day length: | 13.1 - 13.5 hours | |
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Number of rainy days: | 5 days |
| Precipitation totals: | 2.4 in. | |
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forecast
| Niteroi |
temperature
| Niteroi |
Air temperature in January, °F
The highest day temperature during January of 2026 was 92°F. At the same time the lowest night temperature was 68°F. Daily and nightly averages during January were 81.6°F and 73.3°F.
Sea water temperature in Niteroi in January, °F
The average sea water temperature in January of 2026 was 80.5°F. The highest and lowest sea temperatures during the month were 82.4°F and 77.7°F.
Mostly all days in January are cloudy but sunny and partly cloudy days are also possible.
Precipitation total in January, in.
Precipitation total value in Niteroi in January is 2.4 in. Other months of the year show relatively similar values.
The average wind speed value in January is 5.1 mph It makes January 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 January is: 6.6.
Best time for vacation in Niteroi
Niteroi on a weather map
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