Weather in Koper in September
Climate normals based on 10 years of historical data for Koper, Slowenien.
Average high
24°C
Average low
16°C
Rainfall
180 mm
11 rainy days
Sunshine
5.4h/day
Luftfeuchtigkeit
70%
How Hot Is Koper in September?
September keeps Koper warm but with noticeable cooling at night: 24°C peaks, 16°C lows.
Sunshine Hours in September
Sun comes and goes in Koper: 5.4h of direct sun, daylight from 6:45 am to 7:15 pm.
Does It Rain In Koper In September?
September's rainfall in Koper is significant: 180mm across 11 days.
Is Koper Humid In September?
High levels of humidity in Koper year-round (about 70%) will make it feel warmer than the thermometer suggests.
Wind In Koper In September
Wind stays light: 15 kph on a typical day in Koper.
Cloud Cover In Koper In September
Sun and cloud trade off in Koper during September — about 48% cloud cover on average.
Cities With Similar Weather In September
Weather in Koper, month by month
| Month | High / Low | Regen | |
|---|---|---|---|
| Wetter im Januar | 8°C / 2°C | 82mm | Details → |
| Wetter im Februar | 10°C / 3°C | 103mm | Details → |
| Wetter im März | 13°C / 5°C | 87mm | Details → |
| Wetter im April | 17°C / 9°C | 89mm | Details → |
| Wetter im Mai | 21°C / 13°C | 139mm | Details → |
| Wetter im Juni | 26°C / 18°C | 96mm | Details → |
| Wetter im Juli | 29°C / 20°C | 85mm | Details → |
| Wetter im August | 29°C / 21°C | 109mm | Details → |
| Wetter im September | 24°C / 16°C | 180mm | |
| Wetter im Oktober | 19°C / 12°C | 143mm | Details → |
| Wetter im November | 13°C / 7°C | 150mm | Details → |
| Wetter im Dezember | 10°C / 4°C | 119mm | Details → |