Isumi in August
7.5out of 10
Yes, a good time to go
Warm and comfortable: highs around 28°C. Frequent rain: about 11 rainy days.
28°CAvg high
25°CAvg low
11Rainy days (101 mm)
13:20 hDaylight
05:03Sunrise · 18:22 Sunset
Why this score
- Warm and comfortable: highs around 28°C
- Frequent rain: about 11 rainy days
- Rain varies a lot between years (±4.0 days)
What to wear and pack
- T-shirts and light layers
- Shorts or a light skirt
- Rain jacket or compact umbrella
How reliable is the forecast?
Rain in August varies a lot between years (±4.0 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 | 10°C | 6°C | 109 mm | 10 | – | – | 5.7 |
| February | 10°C | 6°C | 106 mm | 12 | – | – | 5.6 |
| March | 13°C | 9°C | 156 mm | 14 | – | – | 5.3 |
| April | 16°C | 13°C | 126 mm | 12 | – | – | 6.4 |
| May | 20°C | 17°C | 138 mm | 11 | – | – | 7.0 |
| June | 23°C | 20°C | 191 mm | 14 | – | – | 6.7 |
| July | 26°C | 24°C | 130 mm | 11 | – | – | 7.3 |
| August | 28°C | 25°C | 101 mm | 11 | – | – | 7.5 |
| September | 25°C | 23°C | 194 mm | 15 | – | – | 6.6 |
| October | 21°C | 19°C | 234 mm | 15 | – | – | 6.3 |
| November | 17°C | 14°C | 147 mm | 14 | – | – | 6.1 |
| December | 13°C | 9°C | 104 mm | 12 | – | – | 5.9 |
Frequently asked questions
How hot is Isumi in August?
Daytime highs average 28°C and nights about 25°C.
When is the best time to visit Isumi?
The best months are August, July, May.