Weather in Portoroz: January
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Average day temperature: | 45.6°F |
| Average night temperature: | 35.9°F | |
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Sea water temperature: | 51.2°F |
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Number of sunny days: | 12 days |
| Day length: | 8.8 - 9.7 hours | |
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Number of rainy days: | 4 days |
| Precipitation totals: | 2.6 in. | |
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forecast
| Portoroz |
temperature
| Portoroz |
Air temperature in January, °F
| Day temperature | Night temperature |
The highest day temperature during January of 2025 was 56°F. At the same time the lowest night temperature was 28°F. Daily and nightly averages during January were 48.0°F and 37.9°F.
Sea water temperature in Portoroz in January, °F
The average sea water temperature in January of 2025 was 51.6°F. The highest and lowest sea temperatures during the month were 53.2°F and 50.4°F.
| Sunny days | |
| Partly cloudy days | |
| Cloudy days |
Number of sunny, partly cloudy and cloudy days in January is almost equal.
Precipitation total in January, in.
Precipitation total value in Portoroz in January is 2.1 in. Other months of the year show relatively similar values.
The average wind speed value in January is 5.3 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 January is: 4.5.
Best time for vacation in Portoroz
Portoroz on a weather map
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