Weather in Koper in september
Climate normals based on 10 years of historical data for Koper, Slovenien.
Average high
24°C
Average low
16°C
Rainfall
180 mm
11 rainy days
Sunshine
5.4h/day
Luftfuktighet
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 | Regn | |
|---|---|---|---|
| Vädret i januari | 8°C / 2°C | 82mm | Details → |
| Vädret i februari | 10°C / 3°C | 103mm | Details → |
| Vädret i mars | 13°C / 5°C | 87mm | Details → |
| Vädret i april | 17°C / 9°C | 89mm | Details → |
| Vädret i maj | 21°C / 13°C | 139mm | Details → |
| Vädret i juni | 26°C / 18°C | 96mm | Details → |
| Vädret i juli | 29°C / 20°C | 85mm | Details → |
| Vädret i augusti | 29°C / 21°C | 109mm | Details → |
| Vädret i september | 24°C / 16°C | 180mm | |
| Vädret i oktober | 19°C / 12°C | 143mm | Details → |
| Vädret i november | 13°C / 7°C | 150mm | Details → |
| Vädret i december | 10°C / 4°C | 119mm | Details → |