Isernia in September
7.7out of 10
Yes, a good time to go
Warm and comfortable: highs around 22°C. Frequent rain: about 10 rainy days.
22°CAvg high
12°CAvg low
10Rainy days (79 mm)
12:16 hDaylight
06:50Sunrise · 19:05 Sunset
Why this score
- Warm and comfortable: highs around 22°C
- Frequent rain: about 10 rainy days
What to wear and pack
- T-shirts and light layers
- A light jacket for cooler evenings
- Rain jacket or compact umbrella
How reliable is the forecast?
Rain in September varies a lot between years (±3.5 rainy days), so check the forecast closer to your trip. Averages cover 30 years (1991–2020). Individual days can differ a lot.
Year at a glance
Weather by month
| Month | Avg high | Avg low | Rainfall | Rainy days | Humidity | Sunshine | Score |
|---|---|---|---|---|---|---|---|
| January | 8°C | 0°C | 88 mm | 10 | – | – | 5.2 |
| February | 9°C | 0°C | 93 mm | 11 | – | – | 5.3 |
| March | 12°C | 3°C | 106 mm | 13 | – | – | 5.6 |
| April | 15°C | 6°C | 108 mm | 14 | – | – | 5.9 |
| May | 19°C | 9°C | 89 mm | 13 | – | – | 6.9 |
| June | 24°C | 13°C | 62 mm | 10 | – | – | 7.7 |
| July | 26°C | 16°C | 43 mm | 8 | – | – | 8.0 |
| August | 27°C | 16°C | 36 mm | 8 | – | – | 8.0 |
| September | 22°C | 12°C | 79 mm | 10 | – | – | 7.7 |
| October | 18°C | 9°C | 111 mm | 10 | – | – | 6.9 |
| November | 13°C | 5°C | 150 mm | 12 | – | – | 5.6 |
| December | 9°C | 1°C | 121 mm | 12 | – | – | 5.1 |
Frequently asked questions
How hot is Isernia in September?
Daytime highs average 22°C and nights about 12°C.
When is the best time to visit Isernia?
The best months are July, August, June, September.