Nikko weather in May
May in Nikko: nice, soaked, with very humid — fine if you can take 19 rainy days.
#1 of 12 months in Nikko · #430 of 897 destinations to visit in May · comfort 83/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Traveller notes on Nikko in May
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Nikko climate normals — May
| Daytime high | 20°C / 67°F | 😎 nice |
|---|---|---|
| Nighttime low | 10°C / 51°F | |
| Rainfall | 187 mm / 7.3 in | ⛈ soaked |
| Rainy days | 19 days | |
| Humidity | 79% | 💦 very humid |
| Dew point | 11°C / 51°F | |
| Sunshine | 9.4 h/day | |
| Daylight | 14.1 h | |
| Wind | 11 km/h / 7 mph | |
| Air quality (US AQI) | 52 | 🙂 moderate |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Nikko in May — FAQ
- Is May a good time to visit Nikko?
- May in Nikko: nice, soaked, with very humid — fine if you can take 19 rainy days. It ranks #1 of 12 months for Nikko on SeasonMap's comfort score (83/100).
- What is the weather like in Nikko in May?
- In May, Nikko averages a daily high of 19.7°C and a low of 10.3°C, with about 186.5 mm of rain over roughly 18.6 rainy days.
- What is the air quality in Nikko in May?
- Nikko has a mean US Air Quality Index of about 52 in May.