Chikusei climate — normals and trends

Q: What is the climate of Chikusei?

Chikusei has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 14.4 °C and it receives 1,322 mm of precipitation per year.

Q: What is the hottest day ever recorded in Chikusei?

The hottest day measured in Chikusei between 1940 and 2025 was 4 August 1994, reaching 40.0 °C.

Q: What is the coldest day in Chikusei?

The coldest day measured in Chikusei between 1940 and 2025 was 17 February 1967, at -15.7 °C.

Q: Does it snow in Chikusei?

Yes. Chikusei gets on average 18.4 cm of snow per year and has around 60 frost days.

Q: Has the climate of Chikusei warmed?

Yes: Chikusei warmed by +2.4 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Chikusei?

The wettest day measured in Chikusei between 1940 and 2025 was 26 September 1958, with 192 mm of rain in 24 hours.

Q: What was the windiest day in Chikusei?

The windiest day measured in Chikusei between 1940 and 2025 was 1 October 2018, with winds reaching 62.0 km/h.

Q: What is the warmest month in Chikusei?

The warmest month in Chikusei is August (26.3 °C on average); the coldest is January (2.9 °C).

Q: How much does it rain in Chikusei?

Chikusei receives on average 1,322 mm of precipitation per year, spread over about 138 rainy days.

Q: Is it sunny in Chikusei?

Chikusei gets on average 7.9 hours of sunshine per day, roughly 2,884 hours per year over 1940-2025.

Chikusei (Japan) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 14.4 °C and it receives 1,322 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 (26.3 °C on average) and the coldest is January (2.9 °C). Rainfall peaks in September.

Chikusei averages 60 frost days, 41 hot days (≥ 30 °C) and 138 rainy days per year.

Chikusei has warmed by +2.4 °C between 1940 and 2025, or +0.29 °C per decade. This trend is statistically significant.

The number of frost days there went from about 81 to 39 per year over the period.

The hottest day of the period reached 40.0 °C (on 4 August 1994) and the coldest -15.7 °C (on 17 February 1967).

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

ChikuseiIbaraki

coords: 36.32°, 139.98°
period: 1940–2025 · 86 yrs

CfaHumid subtropicalWarmest monthAugustColdest monthJanuaryWettest monthSeptemberDriest monthJanuary

Mean daily temperature

14.4°C

Average daily high

19.0°C

Average daily low

10.5°C

Annual rainfall

1,322mm

Sunshine / day

7.9h

Mean relative humidity

74%

Average peak wind

14.4km/h

Seasonal range

23.4°C

Frost days (< 0 °C)

60 d/yr

Hot days (≥ 30 °C)

41 d/yr

Rainy days (≥ 1 mm)

138 d/yr

Annual snowfall

18.4 cm

Average feels-like high

18.6 °C

Average feels-like low

9.6 °C

Average peak gust

30.2 km/h

Tropical nights (≥ 20 °C)

72 d/yr

Solar radiation

13.5 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+2.4 °C

since 1940

+0.3 °C per decade · r² = 0.66 · p = < 0.001

19402025

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

40.0 °C

4 August 1994

Coldest day

-15.7 °C

17 February 1967

Wettest day

192 mm

26 September 1958

Windiest day

62.0 km/h

1 October 2018

Strongest gust

142.6 km/h

27 September 1959

Hottest feels-like

45.8 °C

10 August 2013

Coldest feels-like

-20.4 °C

24 February 1968

Snowiest day

30.0 cm

8 February 2014

Sunniest day

14.0 h

20 June 1962

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days	Frost days
2025	38.2 °C5 August 2025	-5.1 °C5 January 2025	15.9 °C	1,057 mm	82	66
2024	37.3 °C11 August 2024	-5.6 °C29 December 2024	16.6 °C	1,579 mm	79	54
2023	37.8 °C30 July 2023	-5.6 °C25 January 2023	16.8 °C	1,132 mm	85	41
2022	37.8 °C30 June 2022	-5.8 °C7 January 2022	15.6 °C	1,291 mm	58	60
2021	35.6 °C10 August 2021	-4.5 °C9 January 2021	15.7 °C	1,533 mm	45	49
2020	36.8 °C11 August 2020	-5.3 °C7 February 2020	15.6 °C	1,324 mm	48	39
2019	36.0 °C7 August 2019	-4.1 °C10 February 2019	15.7 °C	1,403 mm	48	47
2018	36.8 °C23 July 2018	-10.3 °C24 January 2018	16.0 °C	1,247 mm	63	45
2017	35.2 °C17 July 2017	-3.8 °C25 January 2017	14.9 °C	1,262 mm	46	54
2016	36.3 °C9 August 2016	-5.8 °C25 November 2016	15.5 °C	1,423 mm	49	50
2015	36.8 °C7 August 2015	-3.6 °C29 January 2015	15.6 °C	1,474 mm	39	44
2014	37.0 °C5 August 2014	-7.7 °C10 February 2014	14.9 °C	1,369 mm	38	69
2013	38.0 °C10 August 2013	-9.5 °C16 January 2013	15.2 °C	1,183 mm	49	58
2012	34.8 °C28 July 2012	-4.7 °C27 January 2012	14.5 °C	1,324 mm	58	68
2011	35.4 °C15 July 2011	-4.2 °C31 January 2011	14.8 °C	1,408 mm	52	69
2010	36.1 °C22 July 2010	-6.2 °C19 February 2010	15.3 °C	1,662 mm	66	43
2009	33.4 °C26 July 2009	-3.5 °C25 January 2009	15.1 °C	1,408 mm	27	30
2008	36.3 °C15 August 2008	-3.3 °C26 January 2008	15.0 °C	1,318 mm	43	45
2007	38.2 °C16 August 2007	-2.3 °C25 February 2007	15.4 °C	1,283 mm	49	32
2006	35.4 °C5 August 2006	-4.3 °C5 February 2006	15.0 °C	1,551 mm	34	37
2005	35.3 °C5 August 2005	-4.6 °C7 January 2005	14.7 °C	1,219 mm	54	67
2004	36.8 °C20 July 2004	-3.0 °C30 December 2004	15.7 °C	1,487 mm	60	31
2003	34.8 °C24 August 2003	-3.2 °C22 January 2003	14.5 °C	1,617 mm	31	40
2002	36.9 °C1 August 2002	-3.8 °C11 December 2002	15.2 °C	1,222 mm	54	30
2001	37.9 °C13 July 2001	-7.8 °C30 January 2001	14.8 °C	1,076 mm	44	56
2000	36.5 °C2 September 2000	-2.5 °C28 January 2000	15.3 °C	1,405 mm	59	40
1999	34.4 °C18 August 1999	-4.9 °C20 February 1999	15.5 °C	1,223 mm	54	44
1998	35.5 °C3 July 1998	-12.6 °C10 January 1998	15.2 °C	1,799 mm	37	41
1997	37.4 °C6 July 1997	-2.9 °C22 February 1997	15.2 °C	1,097 mm	47	33
1996	37.1 °C15 August 1996	-6.5 °C20 February 1996	14.3 °C	1,245 mm	40	49
1995	36.7 °C31 July 1995	-3.1 °C5 March 1995	14.8 °C	1,153 mm	47	45
1994	40.0 °C4 August 1994	-6.2 °C24 January 1994	15.4 °C	1,099 mm	64	56
1993	33.1 °C28 August 1993	-3.0 °C15 February 1993	14.1 °C	1,576 mm	15	36
1992	36.2 °C4 September 1992	-4.3 °C3 February 1992	14.6 °C	1,281 mm	42	42
1991	36.9 °C24 July 1991	-3.0 °C24 January 1991	15.1 °C	1,586 mm	39	50
1990	37.8 °C19 July 1990	-8.4 °C25 January 1990	15.7 °C	1,320 mm	61	34
1989	33.3 °C28 August 1989	-1.9 °C15 January 1989	14.9 °C	1,344 mm	34	22
1988	32.9 °C22 August 1988	-4.0 °C13 February 1988	13.9 °C	1,452 mm	19	53
1987	37.0 °C24 July 1987	-5.8 °C15 January 1987	14.8 °C	1,102 mm	42	46
1986	34.2 °C4 September 1986	-8.8 °C20 February 1986	13.7 °C	1,296 mm	33	71
1985	33.9 °C30 July 1985	-8.8 °C31 January 1985	14.3 °C	1,483 mm	48	56
1984	37.8 °C3 September 1984	-13.7 °C20 February 1984	13.3 °C	899 mm	44	89
1983	35.0 °C30 August 1983	-3.5 °C23 January 1983	14.1 °C	1,393 mm	33	55
1982	32.6 °C22 August 1982	-4.9 °C31 January 1982	14.5 °C	1,448 mm	18	42
1981	34.1 °C18 July 1981	-13.5 °C18 February 1981	13.3 °C	1,325 mm	32	77
1980	33.5 °C23 July 1980	-9.4 °C6 February 1980	13.7 °C	1,380 mm	17	72
1979	34.2 °C31 July 1979	-10.6 °C16 January 1979	15.1 °C	1,599 mm	39	50
1978	37.0 °C22 August 1978	-13.7 °C4 January 1978	14.4 °C	1,198 mm	58	71
1977	34.0 °C5 August 1977	-12.3 °C16 February 1977	14.2 °C	1,558 mm	23	68
1976	33.2 °C22 August 1976	-4.6 °C22 December 1976	13.6 °C	1,608 mm	22	63
1975	34.5 °C5 August 1975	-4.5 °C18 February 1975	14.3 °C	1,412 mm	55	60
1974	33.1 °C30 July 1974	-3.8 °C28 February 1974	13.9 °C	1,521 mm	33	65
1973	36.2 °C19 August 1973	-3.2 °C3 February 1973	14.4 °C	1,202 mm	47	70
1972	35.6 °C8 August 1972	-3.7 °C7 January 1972	14.7 °C	1,540 mm	35	45
1971	34.0 °C8 July 1971	-7.8 °C6 January 1971	13.9 °C	1,608 mm	37	61
1970	35.1 °C23 July 1970	-8.9 °C2 March 1970	13.8 °C	1,242 mm	41	73
1969	34.8 °C14 August 1969	-8.7 °C14 March 1969	14.1 °C	1,462 mm	41	68
1968	34.4 °C22 July 1968	-15.6 °C24 February 1968	14.1 °C	1,385 mm	24	65
1967	35.3 °C11 August 1967	-15.7 °C17 February 1967	14.2 °C	1,335 mm	42	72
1966	33.3 °C8 August 1966	-4.8 °C25 January 1966	13.5 °C	1,397 mm	29	75
1965	33.8 °C30 July 1965	-7.2 °C3 February 1965	13.2 °C	1,324 mm	24	79
1964	35.2 °C17 August 1964	-5.1 °C27 February 1964	14.3 °C	1,451 mm	42	53
1963	36.1 °C13 August 1963	-5.4 °C25 January 1963	14.1 °C	1,253 mm	43	67
1962	36.3 °C21 August 1962	-3.5 °C14 February 1962	14.5 °C	1,295 mm	47	66
1961	35.9 °C27 July 1961	-4.2 °C10 March 1961	15.0 °C	1,145 mm	53	71
1960	34.5 °C21 July 1960	-3.7 °C12 February 1960	14.5 °C	1,332 mm	33	56
1959	34.6 °C28 August 1959	-9.5 °C8 January 1959	14.7 °C	1,477 mm	37	52
1958	36.0 °C1 August 1958	-5.5 °C31 March 1958	14.4 °C	1,504 mm	37	48
1957	33.6 °C31 July 1957	-4.6 °C14 January 1957	14.1 °C	1,367 mm	28	62
1956	35.9 °C1 August 1956	-8.9 °C25 January 1956	14.0 °C	1,318 mm	36	80
1955	36.2 °C31 July 1955	-5.0 °C17 January 1955	14.7 °C	1,395 mm	44	65
1954	35.4 °C23 August 1954	-14.6 °C28 January 1954	14.0 °C	1,206 mm	36	53
1953	36.4 °C21 August 1953	-12.7 °C23 February 1953	13.8 °C	1,364 mm	22	65
1952	33.8 °C20 August 1952	-14.1 °C9 January 1952	12.7 °C	1,210 mm	20	98
1951	34.2 °C9 August 1951	-12.0 °C16 February 1951	13.2 °C	1,355 mm	29	83
1950	32.7 °C8 July 1950	-4.6 °C8 January 1950	13.8 °C	1,126 mm	31	96
1949	32.6 °C17 July 1949	-4.9 °C30 December 1949	13.4 °C	1,179 mm	27	81
1948	31.5 °C6 July 1948	-5.2 °C2 January 1948	13.8 °C	1,217 mm	15	80
1947	34.1 °C5 August 1947	-6.0 °C6 January 1947	12.6 °C	1,118 mm	37	100
1946	35.8 °C17 July 1946	-6.4 °C3 February 1946	13.6 °C	986 mm	39	95
1945	32.9 °C4 August 1945	-11.3 °C24 February 1945	12.8 °C	1,357 mm	17	100
1944	32.5 °C2 August 1944	-5.0 °C3 February 1944	13.7 °C	1,087 mm	29	88
1943	32.5 °C15 July 1943	-10.2 °C2 February 1943	13.2 °C	642 mm	30	93
1942	34.8 °C11 July 1942	-6.1 °C14 February 1942	13.6 °C	870 mm	41	88
1941	31.9 °C17 August 1941	-5.5 °C26 January 1941	13.1 °C	1,416 mm	14	80
1940	34.1 °C25 July 1940	-6.0 °C10 February 1940	13.0 °C	875 mm	26	93

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?

Year

Across the whole year

Average daily high

21.1 °C

+2.1 °C

Hot days (≥ 30 °C)

82 d/yr

+41

Frost days (< 0 °C)

66 d/yr

Annual rainfall

1057 mm

-265 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	10.1 °C	+2.1 °C	33 mm	-11 mm
Feb	10.1 °C	+1.2 °C	6 mm	-48 mm
Mar	14.8 °C	+2.3 °C	144 mm	+51 mm
Apr	19.7 °C	+1.7 °C	102 mm	-4 mm
May	22.6 °C	+0.1 °C	183 mm	+53 mm
Jun	28.7 °C	+3.4 °C	136 mm	-19 mm
Jul	32.8 °C	+3.8 °C	79 mm	-77 mm
Aug	34.2 °C	+3.7 °C	54 mm	-79 mm
Sep	30.0 °C	+3.7 °C	120 mm	-50 mm
Oct	21.4 °C	+0.7 °C	101 mm	-53 mm
Nov	16.6 °C	+1.1 °C	32 mm	-47 mm
Dec	11.8 °C	+1.4 °C	67 mm	+20 mm

The year's extremes

Hottest day

38.2 °C

5 Aug 2025

Coldest day

-5.1 °C

5 Jan 2025

Wettest day

49.8 mm

2 May 2025

Windiest day

33.2 km/h

13 Feb 2025

Strongest gust

65.5 km/h

2 May 2025

Hottest feels-like

44.0 °C

26 Jul 2025

Coldest feels-like

-8.9 °C

5 Jan 2025

Snowiest day

6.2 cm

19 Mar 2025

Sunniest day

13.9 h

9 Jul 2025

What was the weather like that day?

Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.

Date

Frequently asked questions

What is the climate of Chikusei?

Chikusei has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 14.4 °C and it receives 1,322 mm of precipitation per year.

What is the hottest day ever recorded in Chikusei?

The hottest day measured in Chikusei between 1940 and 2025 was 4 August 1994, reaching 40.0 °C.

What is the coldest day in Chikusei?

The coldest day measured in Chikusei between 1940 and 2025 was 17 February 1967, at -15.7 °C.

Does it snow in Chikusei?

Yes. Chikusei gets on average 18.4 cm of snow per year and has around 60 frost days.

Has the climate of Chikusei warmed?

Yes: Chikusei warmed by +2.4 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Chikusei?

The wettest day measured in Chikusei between 1940 and 2025 was 26 September 1958, with 192 mm of rain in 24 hours.

What was the windiest day in Chikusei?

The windiest day measured in Chikusei between 1940 and 2025 was 1 October 2018, with winds reaching 62.0 km/h.

What is the warmest month in Chikusei?

The warmest month in Chikusei is August (26.3 °C on average); the coldest is January (2.9 °C).

How much does it rain in Chikusei?

Chikusei receives on average 1,322 mm of precipitation per year, spread over about 138 rainy days.

Is it sunny in Chikusei?

Chikusei 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 Chikusei?

The heaviest 24-hour snowfall measured in Chikusei between 1940 and 2025 was 8 February 2014, with 30.0 cm.

Are there tropical nights in Chikusei?

Yes: Chikusei has on average 72 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Chikusei?

In Chikusei, between 1940 and 2025, the highest apparent temperature reached 45.8 °C on 10 August 2013, and the lowest was -20.4 °C on 24 February 1968.

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