Yamada climate — normals and trends
Yamada (Japan) has a temperate oceanic climate (Cfb) under the Köppen-Geiger classification. Its mean annual temperature is 10.4 °C and it receives 1,427 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 (21.4 °C on average) and the coldest is February (0.9 °C). Rainfall peaks in September.
Yamada averages 59 frost days, 0 hot days (≥ 30 °C) and 139 rainy days per year.
Yamada 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 75 to 43 per year over the period.
The hottest day of the period reached 27.9 °C (on 5 August 2023) and the coldest -8.6 °C (on 9 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
YamadaIwate
- coords
- 39.47°, 141.95°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
10.4°C
Average daily high
12.0°C
Average daily low
8.9°C
Annual rainfall
1,427mm
Sunshine / day
8.6h
Mean relative humidity
77%
Average peak wind
26.4km/h
Seasonal range
20.5°C
Frost days (< 0 °C)
59 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
139 d/yr
Annual snowfall
85.4 cm
Average feels-like high
9.9 °C
Average feels-like low
5.4 °C
Average peak gust
39.8 km/h
Tropical nights (≥ 20 °C)
32 d/yr
Solar radiation
14.0 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.6 °C
since 1940
+0.2 °C per decade · r² = 0.42 · 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
27.9 °C
5 August 2023
Coldest day
-8.6 °C
9 February 1942
Wettest day
199 mm
15 September 1947
Windiest day
92.9 km/h
16 October 2013
Strongest gust
148.7 km/h
16 October 2013
Hottest feels-like
34.3 °C
20 August 2023
Coldest feels-like
-17.1 °C
6 February 1955
Snowiest day
36.5 cm
8 March 2003
Sunniest day
14.8 h
17 June 1942
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 | 5.4 °C | +2.1 °C | 44 mm | -26 mm |
| Feb | 4.2 °C | +1.1 °C | 9 mm | -65 mm |
| Mar | 7.1 °C | +2.0 °C | 107 mm | +4 mm |
| Apr | 9.8 °C | +0.9 °C | 123 mm | +18 mm |
| May | 13.4 °C | +0.6 °C | 151 mm | +40 mm |
| Jun | 18.5 °C | +2.5 °C | 85 mm | -42 mm |
| Jul | 23.2 °C | +3.4 °C | 51 mm | -104 mm |
| Aug | 25.3 °C | +3.0 °C | 101 mm | -59 mm |
| Sep | 23.0 °C | +2.7 °C | 194 mm | -12 mm |
| Oct | 17.0 °C | +1.0 °C | 189 mm | +35 mm |
| Nov | 11.9 °C | +1.0 °C | 83 mm | -3 mm |
| Dec | 7.8 °C | +1.7 °C | 90 mm | +14 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 Yamada?
Yamada has a temperate oceanic climate (Köppen Cfb). Over 1940-2025, the average annual temperature is 10.4 °C and it receives 1,427 mm of precipitation per year.
What is the hottest day ever recorded in Yamada?
The hottest day measured in Yamada between 1940 and 2025 was 5 August 2023, reaching 27.9 °C.
What is the coldest day in Yamada?
The coldest day measured in Yamada between 1940 and 2025 was 9 February 1942, at -8.6 °C.
Does it snow in Yamada?
Yes. Yamada gets on average 85.4 cm of snow per year and has around 59 frost days.
Has the climate of Yamada warmed?
Yes: Yamada warmed by +1.6 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Yamada?
The wettest day measured in Yamada between 1940 and 2025 was 15 September 1947, with 199 mm of rain in 24 hours.
What was the windiest day in Yamada?
The windiest day measured in Yamada between 1940 and 2025 was 16 October 2013, with winds reaching 92.9 km/h.
What is the warmest month in Yamada?
The warmest month in Yamada is August (21.4 °C on average); the coldest is February (0.9 °C).
How much does it rain in Yamada?
Yamada receives on average 1,427 mm of precipitation per year, spread over about 139 rainy days.
Is it sunny in Yamada?
Yamada gets on average 8.6 hours of sunshine per day, roughly 3,139 hours per year over 1940-2025.
What is the biggest single-day snowfall in Yamada?
The heaviest 24-hour snowfall measured in Yamada between 1940 and 2025 was 8 March 2003, with 36.5 cm.
Are there tropical nights in Yamada?
Yes: Yamada has on average 32 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Yamada?
In Yamada, between 1940 and 2025, the highest apparent temperature reached 34.3 °C on 20 August 2023, and the lowest was -17.1 °C on 6 February 1955.
Compare Yamada with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Yamada