Numazu climate — normals and trends
Numazu (Japan) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 15.5 °C and it receives 2,345 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 (25.2 °C on average) and the coldest is January (6.5 °C). Rainfall peaks in June.
Numazu averages 2 frost days, 1 hot days (≥ 30 °C) and 162 rainy days per year.
Numazu has warmed by +1.6 °C between 1940 and 2025, or +0.19 °C per decade. This trend is statistically significant.
The number of frost days there went from about 4 to 0 per year over the period.
The hottest day of the period reached 32.0 °C (on 6 August 2025) and the coldest -4.3 °C (on 13 February 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
NumazuShizuoka
- coords
- 35.10°, 138.87°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
15.5°C
Average daily high
17.4°C
Average daily low
13.7°C
Annual rainfall
2,345mm
Sunshine / day
8.7h
Mean relative humidity
76%
Average peak wind
17.8km/h
Seasonal range
18.7°C
Frost days (< 0 °C)
2 d/yr
Hot days (≥ 30 °C)
1 d/yr
Rainy days (≥ 1 mm)
162 d/yr
Annual snowfall
7.2 cm
Average feels-like high
17.2 °C
Average feels-like low
12.8 °C
Average peak gust
33.2 km/h
Tropical nights (≥ 20 °C)
91 d/yr
Solar radiation
14.6 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.6 °C
since 1940
+0.2 °C per decade · r² = 0.55 · 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
32.0 °C
6 August 2025
Coldest day
-4.3 °C
13 February 1942
Wettest day
235 mm
12 October 2019
Windiest day
72.3 km/h
1 October 2018
Strongest gust
160.9 km/h
1 October 2018
Hottest feels-like
39.3 °C
17 August 2024
Coldest feels-like
-10.0 °C
26 February 1981
Snowiest day
26.2 cm
15 February 1968
Sunniest day
14.0 h
21 June 1940
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 | 9.9 °C | +1.2 °C | 44 mm | -38 mm |
| Feb | 9.2 °C | +0.3 °C | 37 mm | -78 mm |
| Mar | 13.3 °C | +1.9 °C | 234 mm | +36 mm |
| Apr | 16.5 °C | +1.1 °C | 156 mm | -70 mm |
| May | 19.6 °C | +0.6 °C | 342 mm | +94 mm |
| Jun | 24.5 °C | +2.6 °C | 251 mm | -58 mm |
| Jul | 27.9 °C | +2.5 °C | 192 mm | -86 mm |
| Aug | 28.7 °C | +1.8 °C | 127 mm | -77 mm |
| Sep | 26.6 °C | +2.0 °C | 185 mm | -59 mm |
| Oct | 21.3 °C | +1.2 °C | 222 mm | +4 mm |
| Nov | 16.2 °C | +0.5 °C | 40 mm | -101 mm |
| Dec | 12.5 °C | +1.3 °C | 111 mm | +30 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 Numazu?
Numazu has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 15.5 °C and it receives 2,345 mm of precipitation per year.
What is the hottest day ever recorded in Numazu?
The hottest day measured in Numazu between 1940 and 2025 was 6 August 2025, reaching 32.0 °C.
What is the coldest day in Numazu?
The coldest day measured in Numazu between 1940 and 2025 was 13 February 1942, at -4.3 °C.
Does it snow in Numazu?
Yes. Numazu gets on average 7.2 cm of snow per year and has around 2 frost days.
Has the climate of Numazu warmed?
Yes: Numazu warmed by +1.6 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Numazu?
The wettest day measured in Numazu between 1940 and 2025 was 12 October 2019, with 235 mm of rain in 24 hours.
What was the windiest day in Numazu?
The windiest day measured in Numazu between 1940 and 2025 was 1 October 2018, with winds reaching 72.3 km/h.
What is the warmest month in Numazu?
The warmest month in Numazu is August (25.2 °C on average); the coldest is January (6.5 °C).
How much does it rain in Numazu?
Numazu receives on average 2,345 mm of precipitation per year, spread over about 162 rainy days.
Is it sunny in Numazu?
Numazu gets on average 8.7 hours of sunshine per day, roughly 3,175 hours per year over 1940-2025.
What is the biggest single-day snowfall in Numazu?
The heaviest 24-hour snowfall measured in Numazu between 1940 and 2025 was 15 February 1968, with 26.2 cm.
Are there tropical nights in Numazu?
Yes: Numazu has on average 91 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Numazu?
In Numazu, between 1940 and 2025, the highest apparent temperature reached 39.3 °C on 17 August 2024, and the lowest was -10.0 °C on 26 February 1981.
Compare Numazu with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Numazu