Weather in Cerkno: September
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Average day temperature: | 64.1°F |
| Average night temperature: | 50.1°F | |
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Sea water temperature: | 73.3°F |
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Number of sunny days: | 12 days |
| Day length: | 11.7 - 13.3 hours | |
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Number of rainy days: | 8 days |
| Precipitation totals: | 5.3 in. | |
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forecast
| Cerkno |
temperature
| Cerkno |
Air temperature in September, °F
The highest day temperature during September of 2025 was 79°F. At the same time the lowest night temperature was 51°F. Daily and nightly averages during September were 70.8°F and 59.4°F.
Sea water temperature in Cerkno in September, °F
The average sea water temperature in September of 2025 was 73.6°F. The highest and lowest sea temperatures during the month were 75.6°F and 71.1°F.
Number of sunny, partly cloudy and cloudy days in September is almost equal.
Precipitation total in September, in.
Precipitation total value in Cerkno in September is 5.9 in. Other months of the year show relatively similar values.
The average wind speed value in September is 3.6 mph The wind's strength is relatively same during the whole 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 September is: 6.9.
Best time for vacation in Cerkno
Cerkno on a weather map
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