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15°
Clear
Feels Like: 11°
Min: 14°
Max: 22°
The next few hours will be clear, with today reaching 22°C and dropping to 13°C. The coming days will be clear throughout the day.
Compare today's weather with yesterday's data and track temperature trends over time.
Hourly Forecast
Daylight Hours
07:03
Sunrise
18:48
Sunset
Moon
Waxing Gibbous
18:17
Moonrise
05:20
Moonset
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View stargazing scoreWeather in Koper today, September 25, 2026
Koper is set for a fine, sunny day on September 25, 2026, with only limited interruptions to the clear sky. The early hours look particularly favourable for being outside. Expect a brighter morning, with limited cloud around 0% by 07:00. Conditions start on a settled note.
The day peaks near 22°C and cools toward 14°C. Expect humidity between 42% and 66%, most humid near 23:00. Expect gentle winds, highest near 12:00 at 4.5 km/h.
The afternoon keeps an overcast feel, as cloud reaches about 64% around 19:00. Outdoor plans may still want a flexible backup. Expect visibility near 41.6 km, with poorer spells close to 37.5 km. Expect sunrise at 07:03, sunset at 18:48, and 11 hours 45 minutes of sunlight today overall.
Overall, Koper on September 25, 2026 favours outdoor plans under mostly open skies, with a comfortable high near 22°C.
Frequently asked questions about weather in Koper
How warm does it get in Koper?
The warmest month in Koper is August, with average high temperatures of 28°C. The average temperature during this period is around 24°C.
How cold does it get in Koper?
The coldest month in Koper is January, with average low temperatures of 3°C. The average temperature during this period is around 5°C.
What is the wettest time of year in Koper?
The wettest month in Koper is September, with an average of 174mm of precipitation.
What is the driest time of year in Koper?
The driest month in Koper is July, with an average of 63mm of precipitation.
