Nikkō climate — normals and trends
Nikkō (Japan) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 8.8 °C and it receives 1,949 mm of precipitation per year.
These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.
The warmest month is August (21.2 °C on average) and the coldest is January (-3.5 °C). Rainfall peaks in July.
Nikkō averages 127 frost days, 1 hot days (≥ 30 °C) and 202 rainy days per year.
Nikkō has warmed by +2.7 °C between 1940 and 2025, or +0.32 °C per decade. This trend is statistically significant.
The number of frost days there went from about 143 to 111 per year over the period.
The hottest day of the period reached 31.7 °C (on 11 August 2020) and the coldest -19.5 °C (on 17 January 1942).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Climate normals · ERA5
NikkōTochigi
- coords
- 36.75°, 139.62°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
8.8°C
Average daily high
12.7°C
Average daily low
5.2°C
Annual rainfall
1,949mm
Sunshine / day
8.5h
Mean relative humidity
77%
Average peak wind
10.7km/h
Seasonal range
24.7°C
Frost days (< 0 °C)
127 d/yr
Hot days (≥ 30 °C)
1 d/yr
Rainy days (≥ 1 mm)
202 d/yr
Annual snowfall
125.9 cm
Average feels-like high
11.6 °C
Average feels-like low
3.3 °C
Average peak gust
38.3 km/h
Tropical nights (≥ 20 °C)
10 d/yr
Solar radiation
13.8 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.7 °C
since 1940
+0.3 °C per decade · r² = 0.68 · p = < 0.001
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.
Records for the period
Hottest day
31.7 °C
11 August 2020
Coldest day
-19.5 °C
17 January 1942
Wettest day
257 mm
12 October 2019
Windiest day
44.5 km/h
2 August 1982
Strongest gust
195.5 km/h
27 September 1959
Hottest feels-like
37.3 °C
11 August 2020
Coldest feels-like
-24.1 °C
17 January 1942
Snowiest day
66.1 cm
15 February 2014
Sunniest day
14.0 h
13 June 2008
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 2.1 °C | +1.5 °C | 39 mm | -13 mm |
| Feb | 0.9 °C | -0.3 °C | 27 mm | -33 mm |
| Mar | 7.2 °C | +2.1 °C | 127 mm | +24 mm |
| Apr | 13.2 °C | +1.4 °C | 145 mm | +11 mm |
| May | 17.0 °C | +0.2 °C | 247 mm | +74 mm |
| Jun | 23.1 °C | +3.3 °C | 221 mm | -29 mm |
| Jul | 26.6 °C | +3.0 °C | 289 mm | -13 mm |
| Aug | 27.2 °C | +2.5 °C | 203 mm | -81 mm |
| Sep | 23.7 °C | +2.9 °C | 213 mm | -62 mm |
| Oct | 15.9 °C | +0.8 °C | 152 mm | -24 mm |
| Nov | 10.2 °C | +0.6 °C | 50 mm | -35 mm |
| Dec | 4.5 °C | +0.8 °C | 62 mm | +7 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of Nikkō?
Nikkō has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 8.8 °C and it receives 1,949 mm of precipitation per year.
What is the hottest day ever recorded in Nikkō?
The hottest day measured in Nikkō between 1940 and 2025 was 11 August 2020, reaching 31.7 °C.
What is the coldest day in Nikkō?
The coldest day measured in Nikkō between 1940 and 2025 was 17 January 1942, at -19.5 °C.
Does it snow in Nikkō?
Yes. Nikkō gets on average 125.9 cm of snow per year and has around 127 frost days.
Has the climate of Nikkō warmed?
Yes: Nikkō warmed by +2.7 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Nikkō?
The wettest day measured in Nikkō between 1940 and 2025 was 12 October 2019, with 257 mm of rain in 24 hours.
What was the windiest day in Nikkō?
The windiest day measured in Nikkō between 1940 and 2025 was 2 August 1982, with winds reaching 44.5 km/h.
What is the warmest month in Nikkō?
The warmest month in Nikkō is August (21.2 °C on average); the coldest is January (-3.5 °C).
How much does it rain in Nikkō?
Nikkō receives on average 1,949 mm of precipitation per year, spread over about 202 rainy days.
Is it sunny in Nikkō?
Nikkō gets on average 8.5 hours of sunshine per day, roughly 3,103 hours per year over 1940-2025.
What is the biggest single-day snowfall in Nikkō?
The heaviest 24-hour snowfall measured in Nikkō between 1940 and 2025 was 15 February 2014, with 66.1 cm.
Are there tropical nights in Nikkō?
Yes: Nikkō has on average 10 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Nikkō?
In Nikkō, between 1940 and 2025, the highest apparent temperature reached 37.3 °C on 11 August 2020, and the lowest was -24.1 °C on 17 January 1942.
Compare Nikkō with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Nikkō