Climate averages 1991–2020
Nikkō weather
in May.
A mild, wet month: the 5th warmest and the 7th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a mild month in Nikkō: daytime highs average 19.1°C and nights cool to about 9.4°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 176 mm of rain on roughly 17 days, which makes May a wet month (the 7th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 06 min on an average May day.
The nearest other city in this atlas is Kanuma (25 km away). In May its highs average 20.8°C, 1.7°C warmer than Nikkō, with 173 mm of rain.
Among the 303 cities listed in Japan, Nikkō ranks joint 275th of 303 for the warmest May highs and joint 258th of 303 for the driest May (rainfall, lowest first). The mean May high of those 303 cities is 21.3°C; Nikkō is 2.2°C cooler than that mean.
From May to June, average highs rise by 2.8°C to 21.9°C, and monthly rainfall rises from 176 mm to 228 mm.
The annual picture
May in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Nikkō climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 3.3°C-5.1°C | -5.1°C | 62 | 9.6 | 10.010 h |
| February | 4.0°C-5.0°C | -5.0°C | 59 | 9.7 | 10.811 h |
| March | 8.1°C-1.8°C | -1.8°C | 112 | 14.0 | 11.912 h |
| April | 14.3°C3.7°C | 3.7°C | 137 | 15.1 | 13.113 h |
| May, selected | 19.1°C9.4°C | 9.4°C | 176 | 17.1 | 14.114 h |
| June | 21.9°C14.4°C | 14.4°C | 228 | 22.1 | 14.615 h |
| July | 25.5°C18.7°C | 18.7°C | 305 | 25.4 | 14.414 h |
| August | 26.4°C19.8°C | 19.8°C | 259 | 24.9 | 13.614 h |
| September | 22.8°C16.3°C | 16.3°C | 268 | 20.1 | 12.512 h |
| October | 17.4°C10.0°C | 10.0°C | 198 | 16.6 | 11.311 h |
| November | 12.0°C3.4°C | 3.4°C | 84 | 9.4 | 10.210 h |
| December | 6.4°C-1.8°C | -1.8°C | 59 | 10.1 | 9.710 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
May in nearby cities
- Kanuma in MayJapan · 25 kmHigh 20.8°C · Low 11.0°C · 173 mm rain
- Utsunomiya in MayJapan · 31 kmHigh 21.0°C · Low 10.8°C · 134 mm rain
- Ōtawara in MayJapan · 39 kmHigh 20.6°C · Low 10.3°C · 142 mm rain
- Tochigi in MayJapan · 42 kmHigh 22.0°C · Low 12.1°C · 173 mm rain
- Kiryū in MayJapan · 46 kmHigh 21.9°C · Low 11.9°C · 136 mm rain
- Nasushiobara in MayJapan · 47 kmHigh 20.3°C · Low 10.3°C · 148 mm rain
- Sano in MayJapan · 48 kmHigh 22.2°C · Low 12.3°C · 152 mm rain
- Mooka in MayJapan · 50 kmHigh 22.1°C · Low 12.0°C · 134 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Nikkō) is explained once on the Nikkō year overview and on the Sources, method and limits page.