Yahaba climate — normals and trends
Yahaba (Japan) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 8.2 °C and it receives 1,257 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 (21.8 °C on average) and the coldest is January (-5.2 °C). Rainfall peaks in July.
Yahaba averages 142 frost days, 3 hot days (≥ 30 °C) and 170 rainy days per year.
Yahaba has warmed by +2.9 °C between 1940 and 2025, or +0.34 °C per decade. This trend is statistically significant.
The number of frost days there went from about 158 to 126 per year over the period.
The hottest day of the period reached 34.5 °C (on 14 August 2007) and the coldest -26.6 °C (on 7 January 1985).
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
YahabaIwate
- coords
- 39.61°, 141.15°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
8.2°C
Average daily high
12.4°C
Average daily low
3.9°C
Annual rainfall
1,257mm
Sunshine / day
8.1h
Mean relative humidity
80%
Average peak wind
14.4km/h
Seasonal range
27.0°C
Frost days (< 0 °C)
142 d/yr
Hot days (≥ 30 °C)
3 d/yr
Rainy days (≥ 1 mm)
170 d/yr
Annual snowfall
173.1 cm
Average feels-like high
10.6 °C
Average feels-like low
2.0 °C
Average peak gust
42.5 km/h
Tropical nights (≥ 20 °C)
16 d/yr
Solar radiation
13.2 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.9 °C
since 1940
+0.3 °C per decade · r² = 0.67 · 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
34.5 °C
14 August 2007
Coldest day
-26.6 °C
7 January 1985
Wettest day
152 mm
21 August 1991
Windiest day
39.1 km/h
31 March 1979
Strongest gust
125.6 km/h
1 March 1978
Hottest feels-like
39.1 °C
23 August 2018
Coldest feels-like
-31.2 °C
7 January 1985
Snowiest day
46.6 cm
29 March 1966
Sunniest day
14.8 h
12 June 1986
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 | 1.3 °C | +2.2 °C | 56 mm | -12 mm |
| Feb | 0.5 °C | +0.6 °C | 39 mm | -27 mm |
| Mar | 6.5 °C | +2.5 °C | 94 mm | +0 mm |
| Apr | 12.5 °C | +1.3 °C | 120 mm | +22 mm |
| May | 18.0 °C | +0.9 °C | 133 mm | +32 mm |
| Jun | 24.8 °C | +4.3 °C | 99 mm | -16 mm |
| Jul | 29.3 °C | +5.2 °C | 42 mm | -116 mm |
| Aug | 28.2 °C | +2.6 °C | 120 mm | -20 mm |
| Sep | 24.0 °C | +2.8 °C | 176 mm | +26 mm |
| Oct | 15.6 °C | +0.4 °C | 108 mm | +5 mm |
| Nov | 8.8 °C | +0.4 °C | 101 mm | +19 mm |
| Dec | 3.1 °C | +1.2 °C | 94 mm | +13 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 Yahaba?
Yahaba has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 8.2 °C and it receives 1,257 mm of precipitation per year.
What is the hottest day ever recorded in Yahaba?
The hottest day measured in Yahaba between 1940 and 2025 was 14 August 2007, reaching 34.5 °C.
What is the coldest day in Yahaba?
The coldest day measured in Yahaba between 1940 and 2025 was 7 January 1985, at -26.6 °C.
Does it snow in Yahaba?
Yes. Yahaba gets on average 173.1 cm of snow per year and has around 142 frost days.
Has the climate of Yahaba warmed?
Yes: Yahaba warmed by +2.9 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Yahaba?
The wettest day measured in Yahaba between 1940 and 2025 was 21 August 1991, with 152 mm of rain in 24 hours.
What was the windiest day in Yahaba?
The windiest day measured in Yahaba between 1940 and 2025 was 31 March 1979, with winds reaching 39.1 km/h.
What is the warmest month in Yahaba?
The warmest month in Yahaba is August (21.8 °C on average); the coldest is January (-5.2 °C).
How much does it rain in Yahaba?
Yahaba receives on average 1,257 mm of precipitation per year, spread over about 170 rainy days.
Is it sunny in Yahaba?
Yahaba gets on average 8.1 hours of sunshine per day, roughly 2,957 hours per year over 1940-2025.
What is the biggest single-day snowfall in Yahaba?
The heaviest 24-hour snowfall measured in Yahaba between 1940 and 2025 was 29 March 1966, with 46.6 cm.
Are there tropical nights in Yahaba?
Yes: Yahaba has on average 16 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Yahaba?
In Yahaba, between 1940 and 2025, the highest apparent temperature reached 39.1 °C on 23 August 2018, and the lowest was -31.2 °C on 7 January 1985.
Compare Yahaba with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Yahaba