Hanamaki climate — normals and trends
Hanamaki (Japan) has a hot-summer humid continental climate (Dfa) under the Köppen-Geiger classification. Its mean annual temperature is 9.1 °C and it receives 1,395 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 (22.5 °C on average) and the coldest is January (-3.7 °C). Rainfall peaks in July.
Hanamaki averages 129 frost days, 5 hot days (≥ 30 °C) and 182 rainy days per year.
Hanamaki has warmed by +2.8 °C between 1940 and 2025, or +0.33 °C per decade. This trend is statistically significant.
The number of frost days there went from about 148 to 110 per year over the period.
The hottest day of the period reached 34.6 °C (on 23 August 2018) and the coldest -21.8 °C (on 7 January 1941).
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
HanamakiIwate
- coords
- 39.38°, 141.12°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
9.1°C
Average daily high
13.1°C
Average daily low
5.1°C
Annual rainfall
1,395mm
Sunshine / day
7.9h
Mean relative humidity
79%
Average peak wind
13.6km/h
Seasonal range
26.2°C
Frost days (< 0 °C)
129 d/yr
Hot days (≥ 30 °C)
5 d/yr
Rainy days (≥ 1 mm)
182 d/yr
Annual snowfall
197.0 cm
Average feels-like high
11.6 °C
Average feels-like low
3.3 °C
Average peak gust
39.8 km/h
Tropical nights (≥ 20 °C)
24 d/yr
Solar radiation
12.8 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.8 °C
since 1940
+0.3 °C per decade · r² = 0.65 · 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
34.6 °C
23 August 2018
Coldest day
-21.8 °C
7 January 1941
Wettest day
131 mm
27 July 1941
Windiest day
39.7 km/h
13 December 1957
Strongest gust
129.6 km/h
16 February 2021
Hottest feels-like
40.5 °C
2 August 2025
Coldest feels-like
-27.0 °C
7 January 1941
Snowiest day
38.6 cm
29 March 1966
Sunniest day
14.7 h
13 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 | 1.7 °C | +1.8 °C | 76 mm | -10 mm |
| Feb | 1.3 °C | +0.6 °C | 64 mm | -14 mm |
| Mar | 7.0 °C | +2.3 °C | 102 mm | -2 mm |
| Apr | 12.9 °C | +1.1 °C | 139 mm | +33 mm |
| May | 18.4 °C | +0.7 °C | 144 mm | +37 mm |
| Jun | 25.3 °C | +4.1 °C | 116 mm | -4 mm |
| Jul | 29.8 °C | +5.1 °C | 52 mm | -116 mm |
| Aug | 28.8 °C | +2.5 °C | 154 mm | +9 mm |
| Sep | 24.6 °C | +2.7 °C | 199 mm | +39 mm |
| Oct | 16.4 °C | +0.5 °C | 115 mm | -1 mm |
| Nov | 9.6 °C | +0.4 °C | 124 mm | +21 mm |
| Dec | 4.0 °C | +1.3 °C | 127 mm | +25 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 Hanamaki?
Hanamaki has a hot-summer humid continental climate (Köppen Dfa). Over 1940-2025, the average annual temperature is 9.1 °C and it receives 1,395 mm of precipitation per year.
What is the hottest day ever recorded in Hanamaki?
The hottest day measured in Hanamaki between 1940 and 2025 was 23 August 2018, reaching 34.6 °C.
What is the coldest day in Hanamaki?
The coldest day measured in Hanamaki between 1940 and 2025 was 7 January 1941, at -21.8 °C.
Does it snow in Hanamaki?
Yes. Hanamaki gets on average 197.0 cm of snow per year and has around 129 frost days.
Has the climate of Hanamaki warmed?
Yes: Hanamaki warmed by +2.8 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Hanamaki?
The wettest day measured in Hanamaki between 1940 and 2025 was 27 July 1941, with 131 mm of rain in 24 hours.
What was the windiest day in Hanamaki?
The windiest day measured in Hanamaki between 1940 and 2025 was 13 December 1957, with winds reaching 39.7 km/h.
What is the warmest month in Hanamaki?
The warmest month in Hanamaki is August (22.5 °C on average); the coldest is January (-3.7 °C).
How much does it rain in Hanamaki?
Hanamaki receives on average 1,395 mm of precipitation per year, spread over about 182 rainy days.
Is it sunny in Hanamaki?
Hanamaki gets on average 7.9 hours of sunshine per day, roughly 2,884 hours per year over 1940-2025.
What is the biggest single-day snowfall in Hanamaki?
The heaviest 24-hour snowfall measured in Hanamaki between 1940 and 2025 was 29 March 1966, with 38.6 cm.
Are there tropical nights in Hanamaki?
Yes: Hanamaki has on average 24 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Hanamaki?
In Hanamaki, between 1940 and 2025, the highest apparent temperature reached 40.5 °C on 2 August 2025, and the lowest was -27.0 °C on 7 January 1941.
Compare Hanamaki with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Hanamaki