Kostanjevica na Krki Weather in September
What's the weather like in Kostanjevica na Krki (Kostanjevica na Krki) in September 2025?
The climate in Kostanjevica na Krki during September can be summarized as mild and damp.
September is in the fall / autumn in Kostanjevica na Krki and is typically the 4th warmest month of the year. Daytime maximum temperatures average around 22°C (71°F), whilst at night 10°C (50°F) is normal.
| Daytime temperature | 21.5°C 70.7°F |
|---|---|
| Nightly temperature | 10.1°C 50.2°F |
| Average temperature | 15.8°C 60.4°F |
| Daily sunshine | 7 hrs |
| Avg rainfall | 105 mm 4.1 ins |
| Rainy days | 12 days |
| Sea temperature | 22.6°C 72.7°F |
| Humidity | 83% |
| Windspeed | 5.8kph 4 mph |
On average September is the 5th wettest month of the year in Kostanjevica na Krki with around 105mm 4.1 inches of rain making it a damp time to visit. This rainfall is typically spread over 12 days, although this may vary considerably.
On the flip side this corresponds to an average of 7 hours of sunshine per day.
September temperatures in Kostanjevica na Krki
September rainfall
September hourly sunshine
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Kostanjevica na Krki in September 2025.
Other monthly averages
Best places to visit in September
Kostanjevica na Krki weather stats
| Hottest month: | July | 25.5°C 77.9°F |
|---|---|---|
| Driest month: | February | 57mm 2.2ins |
| Sunniest month: | July | 9.7hrs |
| Coldest month: | January | 2.3°C 36.1°F |
| Wettest month: | June | 125mm 4.9ins |
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