Hitachi climate — normals and trends
Hitachi (Japan) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 14.5 °C and it receives 1,482 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 (24.5 °C on average) and the coldest is February (5.5 °C). Rainfall peaks in October.
Hitachi averages 2 frost days, 0 hot days (≥ 30 °C) and 145 rainy days per year.
Hitachi 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 5 to 0 per year over the period.
The hottest day of the period reached 31.0 °C (on 2 August 2022) and the coldest -2.6 °C (on 5 February 1952).
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
HitachiIbaraki
- coords
- 36.60°, 140.65°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
14.5°C
Average daily high
16.2°C
Average daily low
13.0°C
Annual rainfall
1,482mm
Sunshine / day
8.6h
Mean relative humidity
75%
Average peak wind
23.5km/h
Seasonal range
19.0°C
Frost days (< 0 °C)
2 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
145 d/yr
Annual snowfall
11.8 cm
Average feels-like high
15.5 °C
Average feels-like low
10.7 °C
Average peak gust
38.3 km/h
Tropical nights (≥ 20 °C)
81 d/yr
Solar radiation
14.3 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.6 °C
since 1940
+0.2 °C per decade · r² = 0.44 · 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
31.0 °C
2 August 2022
Coldest day
-2.6 °C
5 February 1952
Wettest day
151 mm
22 September 1996
Windiest day
77.3 km/h
17 September 1995
Strongest gust
146.2 km/h
1 October 2018
Hottest feels-like
38.3 °C
2 August 2022
Coldest feels-like
-10.5 °C
25 January 2023
Snowiest day
21.7 cm
8 February 2014
Sunniest day
14.1 h
25 June 1943
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 | 9.3 °C | +1.6 °C | 54 mm | -6 mm |
| Feb | 8.2 °C | +0.6 °C | 11 mm | -60 mm |
| Mar | 12.0 °C | +2.0 °C | 163 mm | +47 mm |
| Apr | 15.5 °C | +1.7 °C | 137 mm | +11 mm |
| May | 18.4 °C | +1.0 °C | 246 mm | +107 mm |
| Jun | 23.1 °C | +2.8 °C | 164 mm | +6 mm |
| Jul | 26.6 °C | +2.9 °C | 52 mm | -99 mm |
| Aug | 27.9 °C | +2.2 °C | 62 mm | -62 mm |
| Sep | 26.0 °C | +2.5 °C | 105 mm | -75 mm |
| Oct | 20.1 °C | +0.9 °C | 151 mm | -35 mm |
| Nov | 15.3 °C | +0.4 °C | 54 mm | -50 mm |
| Dec | 11.3 °C | +1.0 °C | 99 mm | +31 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 Hitachi?
Hitachi has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 14.5 °C and it receives 1,482 mm of precipitation per year.
What is the hottest day ever recorded in Hitachi?
The hottest day measured in Hitachi between 1940 and 2025 was 2 August 2022, reaching 31.0 °C.
What is the coldest day in Hitachi?
The coldest day measured in Hitachi between 1940 and 2025 was 5 February 1952, at -2.6 °C.
Does it snow in Hitachi?
Yes. Hitachi gets on average 11.8 cm of snow per year and has around 2 frost days.
Has the climate of Hitachi warmed?
Yes: Hitachi warmed by +1.6 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Hitachi?
The wettest day measured in Hitachi between 1940 and 2025 was 22 September 1996, with 151 mm of rain in 24 hours.
What was the windiest day in Hitachi?
The windiest day measured in Hitachi between 1940 and 2025 was 17 September 1995, with winds reaching 77.3 km/h.
What is the warmest month in Hitachi?
The warmest month in Hitachi is August (24.5 °C on average); the coldest is February (5.5 °C).
How much does it rain in Hitachi?
Hitachi receives on average 1,482 mm of precipitation per year, spread over about 145 rainy days.
Is it sunny in Hitachi?
Hitachi 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 Hitachi?
The heaviest 24-hour snowfall measured in Hitachi between 1940 and 2025 was 8 February 2014, with 21.7 cm.
Are there tropical nights in Hitachi?
Yes: Hitachi has on average 81 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Hitachi?
In Hitachi, between 1940 and 2025, the highest apparent temperature reached 38.3 °C on 2 August 2022, and the lowest was -10.5 °C on 25 January 2023.
Compare Hitachi with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Hitachi