Osan in May
8.1out of 10
Yes, a good time to go
Warm and comfortable: highs around 23°C. Some rain: about 7 rainy days.
23°CAvg high
12°CAvg low
7Rainy days (88 mm)
13:59 hDaylight
05:28Sunrise · 19:28 Sunset
Why this score
- Warm and comfortable: highs around 23°C
- Some rain: about 7 rainy days
What to wear and pack
- T-shirts and light layers
- A light jacket for cooler evenings
How reliable is the forecast?
Rainfall in May is fairly consistent from year to year (2.3 days). 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 | 2°C | -6°C | 20 mm | 4 | – | – | 4.9 |
| February | 5°C | -4°C | 27 mm | 4 | – | – | 5.4 |
| March | 11°C | 1°C | 38 mm | 6 | – | – | 6.4 |
| April | 17°C | 7°C | 69 mm | 7 | – | – | 7.4 |
| May | 23°C | 12°C | 88 mm | 7 | – | – | 8.1 |
| June | 27°C | 18°C | 126 mm | 8 | – | – | 7.9 |
| July | 28°C | 22°C | 277 mm | 15 | – | – | 6.2 |
| August | 29°C | 22°C | 227 mm | 15 | – | – | 6.3 |
| September | 26°C | 17°C | 124 mm | 8 | – | – | 7.8 |
| October | 20°C | 10°C | 54 mm | 5 | – | – | 8.0 |
| November | 12°C | 3°C | 46 mm | 7 | – | – | 6.5 |
| December | 4°C | -4°C | 23 mm | 5 | – | – | 5.2 |
Frequently asked questions
How hot is Osan in May?
Daytime highs average 23°C and nights about 12°C.
When is the best time to visit Osan?
The best months are May, October, June, September.