Tateyama climate — normals and trends
Tateyama (Japan) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 17.0 °C and it receives 1,698 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 (25.7 °C on average) and the coldest is February (8.7 °C). Rainfall peaks in October.
Tateyama averages 0 frost days, 0 hot days (≥ 30 °C) and 143 rainy days per year.
Tateyama has warmed by +1.2 °C between 1940 and 2025, or +0.15 °C per decade. This trend is statistically significant.
The hottest day of the period reached 30.2 °C (on 17 August 2024) and the coldest 0.6 °C (on 22 January 1997).
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
TateyamaChiba
- coords
- 34.98°, 139.87°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
17.0°C
Average daily high
18.4°C
Average daily low
15.8°C
Annual rainfall
1,698mm
Sunshine / day
8.4h
Mean relative humidity
75%
Average peak wind
35.2km/h
Seasonal range
17.0°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
143 d/yr
Annual snowfall
1.4 cm
Average feels-like high
17.5 °C
Average feels-like low
12.7 °C
Average peak gust
49.6 km/h
Tropical nights (≥ 20 °C)
117 d/yr
Solar radiation
14.3 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.2 °C
since 1940
+0.2 °C per decade · r² = 0.42 · 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
30.2 °C
17 August 2024
Coldest day
0.6 °C
22 January 1997
Wettest day
216 mm
22 September 1996
Windiest day
106.5 km/h
7 September 2007
Strongest gust
171.4 km/h
1 October 2018
Hottest feels-like
38.0 °C
16 August 2020
Coldest feels-like
-10.4 °C
15 February 1951
Snowiest day
14.6 cm
15 February 1951
Sunniest day
13.9 h
22 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 | 12.1 °C | +1.2 °C | 57 mm | -25 mm |
| Feb | 11.1 °C | +0.3 °C | 29 mm | -69 mm |
| Mar | 14.3 °C | +1.2 °C | 184 mm | +36 mm |
| Apr | 16.8 °C | +0.5 °C | 146 mm | +7 mm |
| May | 19.4 °C | +0.3 °C | 236 mm | +81 mm |
| Jun | 23.7 °C | +2.0 °C | 117 mm | -83 mm |
| Jul | 27.1 °C | +2.6 °C | 50 mm | -83 mm |
| Aug | 27.5 °C | +1.1 °C | 48 mm | -64 mm |
| Sep | 26.5 °C | +1.6 °C | 78 mm | -105 mm |
| Oct | 22.3 °C | +1.0 °C | 246 mm | +19 mm |
| Nov | 18.0 °C | +0.3 °C | 76 mm | -65 mm |
| Dec | 15.4 °C | +1.9 °C | 97 mm | +17 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 Tateyama?
Tateyama has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 17.0 °C and it receives 1,698 mm of precipitation per year.
What is the hottest day ever recorded in Tateyama?
The hottest day measured in Tateyama between 1940 and 2025 was 17 August 2024, reaching 30.2 °C.
What is the coldest day in Tateyama?
The coldest day measured in Tateyama between 1940 and 2025 was 22 January 1997, at 0.6 °C.
Does it snow in Tateyama?
Yes. Tateyama gets on average 1.4 cm of snow per year and has around 0 frost days.
Has the climate of Tateyama warmed?
Yes: Tateyama warmed by +1.2 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Tateyama?
The wettest day measured in Tateyama between 1940 and 2025 was 22 September 1996, with 216 mm of rain in 24 hours.
What was the windiest day in Tateyama?
The windiest day measured in Tateyama between 1940 and 2025 was 7 September 2007, with winds reaching 106.5 km/h.
What is the warmest month in Tateyama?
The warmest month in Tateyama is August (25.7 °C on average); the coldest is February (8.7 °C).
How much does it rain in Tateyama?
Tateyama receives on average 1,698 mm of precipitation per year, spread over about 143 rainy days.
Is it sunny in Tateyama?
Tateyama gets on average 8.4 hours of sunshine per day, roughly 3,066 hours per year over 1940-2025.
What is the biggest single-day snowfall in Tateyama?
The heaviest 24-hour snowfall measured in Tateyama between 1940 and 2025 was 15 February 1951, with 14.6 cm.
Are there tropical nights in Tateyama?
Yes: Tateyama has on average 117 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Tateyama?
In Tateyama, between 1940 and 2025, the highest apparent temperature reached 38.0 °C on 16 August 2020, and the lowest was -10.4 °C on 15 February 1951.
Compare Tateyama with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Tateyama