Shiroishi in September
6.9out of 10
Possible, with caveats
Warm and comfortable: highs around 23°C. Frequent rain: about 14 rainy days.
23°CAvg high
16°CAvg low
14Rainy days (155 mm)
12:14 hDaylight
05:25Sunrise · 17:39 Sunset
Why this score
- Warm and comfortable: highs around 23°C
- Frequent rain: about 14 rainy days
What to wear and pack
- T-shirts and light layers
- 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 | 3°C | -4°C | 78 mm | 14 | – | – | 3.6 |
| February | 4°C | -3°C | 59 mm | 12 | – | – | 4.1 |
| March | 7°C | 0°C | 91 mm | 14 | – | – | 4.7 |
| April | 14°C | 5°C | 96 mm | 13 | – | – | 6.0 |
| May | 19°C | 11°C | 98 mm | 13 | – | – | 6.9 |
| June | 22°C | 15°C | 130 mm | 14 | – | – | 6.9 |
| July | 26°C | 19°C | 184 mm | 18 | – | – | 6.2 |
| August | 27°C | 20°C | 161 mm | 16 | – | – | 6.6 |
| September | 23°C | 16°C | 155 mm | 14 | – | – | 6.9 |
| October | 18°C | 10°C | 133 mm | 12 | – | – | 6.6 |
| November | 12°C | 4°C | 69 mm | 11 | – | – | 5.9 |
| December | 5°C | -1°C | 69 mm | 14 | – | – | 4.3 |
Frequently asked questions
How hot is Shiroishi in September?
Daytime highs average 23°C and nights about 16°C.
When is the best time to visit Shiroishi?
The best months are May, June, September, August.