Celje weather in September
Temperature, rain and sunshine in September: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in September
Good
Best time to visit: May – September
What is the weather like in Celje in September?
In September, Celje is mild: daytime highs average 21 °C, and nights cool down to about 12 °C. Expect around 6 hours of sunshine a day. Rain is frequent, with about 11 rainy days and 110 mm in total. All in all, September is a good month for a holiday in Celje.
September compared
How the weather changes from August to October. Tap a month to open it.
| AugustAug | SeptemberSep | OctoberOct | |
|---|---|---|---|
| Score | 83 | 75 | 64 |
| Day | 26° | 21° | 16° |
| Night | 17° | 12° | 8° |
| Sun | 8 h | 6 h | 4 h |
| Rain days | 10 | 11 | 9 |
More details for September
- Daylight
- 12 h 38 min06:35 – 19:13
- UV index
- 5 · moderateclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 11 km/haverage daily peakAll months
- Cloud cover
- 58 %on averageAll months
- Hot days
- 0 days30 °C or moreAll months
- Snow days
- 0 days1 cm or more of fresh snowAll months
- Time zone
- UTC+2Europe/Ljubljana
How the score comes together
- Temperatureweight 50 %100 %
- Sunshineweight 20 %47 %
- Few rainy daysweight 30 %53 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in September
- Sunscreen
- A jumper for the evenings
- Rain jacket or umbrella
Celje in September: quick answers
Is Celje hot in September?
No. In September, Celje is mild: daytime highs average 21 °C and nights drop to about 12 °C.
Does it rain much in Celje in September?
Rain is frequent, with about 11 rainy days and 110 mm in total.
Celje month by month
The whole year in CeljeAll destinations: SloveniaWhere to go in September
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences