Kasama climate — normals and trends

Q: What is the climate of Kasama?

Kasama has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 13.9 °C and it receives 1,446 mm of precipitation per year.

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

The hottest day measured in Kasama between 1940 and 2025 was 4 August 1994, reaching 37.3 °C.

Q: What is the coldest day in Kasama?

The coldest day measured in Kasama between 1940 and 2025 was 22 February 1968, at -14.6 °C.

Q: Does it snow in Kasama?

Yes. Kasama gets on average 20.4 cm of snow per year and has around 52 frost days.

Q: Has the climate of Kasama warmed?

Yes: Kasama warmed by +2.3 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Kasama?

The wettest day measured in Kasama between 1940 and 2025 was 26 September 1958, with 171 mm of rain in 24 hours.

Q: What was the windiest day in Kasama?

The windiest day measured in Kasama between 1940 and 2025 was 1 October 2018, with winds reaching 52.8 km/h.

Q: What is the warmest month in Kasama?

The warmest month in Kasama is August (25.5 °C on average); the coldest is January (3.0 °C).

Q: How much does it rain in Kasama?

Kasama receives on average 1,446 mm of precipitation per year, spread over about 149 rainy days.

Q: Is it sunny in Kasama?

Kasama gets on average 8.3 hours of sunshine per day, roughly 3,030 hours per year over 1940-2025.

Kasama (Japan) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 13.9 °C and it receives 1,446 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 (25.5 °C on average) and the coldest is January (3.0 °C). Rainfall peaks in September.

Kasama averages 52 frost days, 28 hot days (≥ 30 °C) and 149 rainy days per year.

Kasama has warmed by +2.3 °C between 1940 and 2025, or +0.27 °C per decade. This trend is statistically significant.

The number of frost days there went from about 74 to 30 per year over the period.

The hottest day of the period reached 37.3 °C (on 4 August 1994) and the coldest -14.6 °C (on 22 February 1968).

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

KasamaIbaraki

coords: 36.38°, 140.27°
period: 1940–2025 · 86 yrs

CfaHumid subtropicalWarmest monthAugustColdest monthJanuaryWettest monthSeptemberDriest monthJanuary

Mean daily temperature

13.9°C

Average daily high

18.1°C

Average daily low

10.3°C

Annual rainfall

1,446mm

Sunshine / day

8.3h

Mean relative humidity

73%

Average peak wind

13.6km/h

Seasonal range

22.5°C

Frost days (< 0 °C)

52 d/yr

Hot days (≥ 30 °C)

28 d/yr

Rainy days (≥ 1 mm)

149 d/yr

Annual snowfall

20.4 cm

Average feels-like high

17.8 °C

Average feels-like low

9.2 °C

Average peak gust

32.2 km/h

Tropical nights (≥ 20 °C)

65 d/yr

Solar radiation

13.8 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+2.3 °C

since 1940

+0.3 °C per decade · r² = 0.64 · 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

37.3 °C

4 August 1994

Coldest day

-14.6 °C

22 February 1968

Wettest day

171 mm

26 September 1958

Windiest day

52.8 km/h

1 October 2018

Strongest gust

142.6 km/h

27 September 1959

Hottest feels-like

44.7 °C

16 August 2007

Coldest feels-like

-18.9 °C

17 February 1967

Snowiest day

31.9 cm

8 February 2014

Sunniest day

14.1 h

16 June 2007

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days	Frost days
2025	36.0 °C2 September 2025	-5.2 °C23 February 2025	15.3 °C	1,211 mm	67	65
2024	35.7 °C22 July 2024	-4.3 °C29 December 2024	16.0 °C	1,678 mm	66	46
2023	36.5 °C16 July 2023	-6.0 °C25 January 2023	16.3 °C	1,257 mm	71	34
2022	37.2 °C2 August 2022	-3.3 °C22 January 2022	15.1 °C	1,398 mm	47	51
2021	34.7 °C10 August 2021	-3.2 °C9 January 2021	15.2 °C	1,672 mm	32	43
2020	36.0 °C11 August 2020	-5.2 °C7 February 2020	15.2 °C	1,391 mm	39	28
2019	35.1 °C7 August 2019	-3.3 °C10 January 2019	15.2 °C	1,461 mm	35	39
2018	35.8 °C5 August 2018	-9.8 °C24 January 2018	15.5 °C	1,410 mm	53	44
2017	33.5 °C24 August 2017	-4.1 °C8 March 2017	14.4 °C	1,313 mm	33	46
2016	35.5 °C9 August 2016	-3.4 °C13 January 2016	15.0 °C	1,442 mm	29	38
2015	35.0 °C1 August 2015	-2.8 °C29 January 2015	15.1 °C	1,466 mm	31	34
2014	35.7 °C5 August 2014	-5.0 °C10 February 2014	14.4 °C	1,498 mm	29	59
2013	36.4 °C10 August 2013	-7.5 °C17 January 2013	14.6 °C	1,304 mm	31	48
2012	33.6 °C17 July 2012	-4.2 °C27 January 2012	14.0 °C	1,523 mm	39	60
2011	34.2 °C10 August 2011	-3.6 °C28 January 2011	14.3 °C	1,635 mm	42	62
2010	34.7 °C16 August 2010	-4.2 °C19 February 2010	14.8 °C	1,748 mm	54	35
2009	33.2 °C26 July 2009	-2.6 °C20 December 2009	14.6 °C	1,432 mm	19	29
2008	33.4 °C8 August 2008	-2.8 °C26 January 2008	14.5 °C	1,337 mm	24	31
2007	36.7 °C16 August 2007	-2.9 °C31 December 2007	14.8 °C	1,397 mm	36	23
2006	34.1 °C4 August 2006	-4.2 °C5 February 2006	14.5 °C	1,677 mm	25	32
2005	33.7 °C5 August 2005	-3.6 °C10 January 2005	14.1 °C	1,246 mm	38	54
2004	34.9 °C20 July 2004	-2.5 °C23 January 2004	15.0 °C	1,652 mm	42	32
2003	33.5 °C24 August 2003	-4.3 °C25 February 2003	14.0 °C	1,743 mm	23	26
2002	35.7 °C1 August 2002	-5.1 °C11 December 2002	14.6 °C	1,308 mm	41	22
2001	36.4 °C13 July 2001	-6.2 °C16 January 2001	14.3 °C	1,200 mm	31	46
2000	35.8 °C2 September 2000	-2.2 °C25 February 2000	14.7 °C	1,461 mm	41	33
1999	33.9 °C30 July 1999	-2.9 °C4 February 1999	15.0 °C	1,296 mm	40	33
1998	34.1 °C3 July 1998	-11.9 °C10 January 1998	14.8 °C	1,907 mm	20	32
1997	36.0 °C5 July 1997	-2.7 °C22 January 1997	14.7 °C	1,179 mm	31	18
1996	35.9 °C15 August 1996	-4.4 °C20 February 1996	13.8 °C	1,320 mm	26	36
1995	34.8 °C31 July 1995	-2.3 °C26 December 1995	14.2 °C	1,280 mm	34	24
1994	37.3 °C4 August 1994	-6.2 °C30 January 1994	14.9 °C	1,213 mm	53	35
1993	32.1 °C28 August 1993	-2.2 °C15 February 1993	13.6 °C	1,685 mm	6	30
1992	34.2 °C31 July 1992	-4.7 °C2 February 1992	14.1 °C	1,311 mm	30	28
1991	34.9 °C24 July 1991	-2.2 °C24 January 1991	14.6 °C	1,692 mm	32	33
1990	34.9 °C19 July 1990	-5.6 °C26 January 1990	15.1 °C	1,509 mm	36	25
1989	32.8 °C28 August 1989	-2.1 °C19 March 1989	14.4 °C	1,433 mm	18	20
1988	31.5 °C23 August 1988	-6.6 °C17 February 1988	13.3 °C	1,576 mm	10	41
1987	36.2 °C24 July 1987	-3.8 °C8 December 1987	14.4 °C	1,283 mm	34	37
1986	33.6 °C4 September 1986	-6.7 °C20 February 1986	13.3 °C	1,457 mm	21	63
1985	34.0 °C29 July 1985	-6.1 °C31 January 1985	13.8 °C	1,541 mm	40	49
1984	35.4 °C3 September 1984	-9.7 °C19 February 1984	12.9 °C	945 mm	34	81
1983	34.1 °C7 August 1983	-6.0 °C23 January 1983	13.5 °C	1,569 mm	22	52
1982	31.7 °C22 August 1982	-4.1 °C19 January 1982	14.0 °C	1,515 mm	11	31
1981	33.1 °C18 July 1981	-7.8 °C18 February 1981	12.9 °C	1,394 mm	22	65
1980	32.5 °C23 July 1980	-6.5 °C20 February 1980	13.4 °C	1,561 mm	8	64
1979	33.5 °C1 August 1979	-5.7 °C16 January 1979	14.7 °C	1,782 mm	22	45
1978	34.9 °C21 August 1978	-10.7 °C4 January 1978	14.0 °C	1,400 mm	45	58
1977	33.1 °C5 August 1977	-11.8 °C3 February 1977	13.8 °C	1,783 mm	12	64
1976	32.7 °C1 August 1976	-4.3 °C28 December 1976	13.2 °C	1,872 mm	15	47
1975	33.8 °C5 August 1975	-4.1 °C18 February 1975	13.8 °C	1,563 mm	36	55
1974	32.3 °C30 July 1974	-5.4 °C28 February 1974	13.3 °C	1,734 mm	17	55
1973	33.8 °C18 August 1973	-3.0 °C25 February 1973	13.9 °C	1,294 mm	38	54
1972	33.8 °C8 August 1972	-3.0 °C25 February 1972	14.2 °C	1,725 mm	25	38
1971	33.4 °C7 August 1971	-4.8 °C7 January 1971	13.5 °C	1,774 mm	28	54
1970	33.9 °C23 July 1970	-7.6 °C17 January 1970	13.3 °C	1,313 mm	32	66
1969	33.5 °C30 July 1969	-7.4 °C14 March 1969	13.6 °C	1,714 mm	23	60
1968	33.2 °C19 July 1968	-14.6 °C22 February 1968	13.7 °C	1,548 mm	17	58
1967	33.9 °C11 August 1967	-14.5 °C17 February 1967	13.8 °C	1,408 mm	28	70
1966	31.3 °C8 August 1966	-4.6 °C8 February 1966	13.1 °C	1,665 mm	17	71
1965	32.6 °C30 July 1965	-6.0 °C7 February 1965	12.7 °C	1,500 mm	12	74
1964	33.9 °C17 August 1964	-4.6 °C29 February 1964	13.8 °C	1,631 mm	31	41
1963	33.8 °C13 August 1963	-4.3 °C25 January 1963	13.7 °C	1,423 mm	26	67
1962	35.3 °C21 August 1962	-3.0 °C27 February 1962	14.1 °C	1,363 mm	33	49
1961	34.8 °C26 July 1961	-3.9 °C10 March 1961	14.6 °C	1,345 mm	36	60
1960	33.4 °C21 July 1960	-3.3 °C25 January 1960	14.1 °C	1,409 mm	26	45
1959	33.7 °C31 July 1959	-8.4 °C12 January 1959	14.2 °C	1,634 mm	27	46
1958	34.3 °C1 August 1958	-5.0 °C4 January 1958	13.9 °C	1,619 mm	22	40
1957	33.2 °C28 July 1957	-3.8 °C13 January 1957	13.7 °C	1,472 mm	20	49
1956	33.5 °C1 August 1956	-8.3 °C25 January 1956	13.4 °C	1,437 mm	24	70
1955	34.8 °C31 July 1955	-4.5 °C17 January 1955	14.3 °C	1,459 mm	29	52
1954	34.5 °C23 August 1954	-11.7 °C28 January 1954	13.6 °C	1,348 mm	22	49
1953	35.2 °C21 August 1953	-9.7 °C23 February 1953	13.4 °C	1,538 mm	16	57
1952	32.4 °C20 August 1952	-13.0 °C20 February 1952	12.4 °C	1,299 mm	17	94
1951	32.8 °C9 August 1951	-10.4 °C16 February 1951	12.9 °C	1,456 mm	23	75
1950	31.8 °C19 July 1950	-4.3 °C7 January 1950	13.4 °C	1,260 mm	19	85
1949	31.6 °C6 August 1949	-4.4 °C30 December 1949	12.9 °C	1,271 mm	16	74
1948	30.5 °C4 September 1948	-4.3 °C24 February 1948	13.4 °C	1,276 mm	8	68
1947	32.7 °C14 August 1947	-5.5 °C5 February 1947	12.2 °C	1,343 mm	22	95
1946	33.9 °C17 July 1946	-5.8 °C4 February 1946	13.1 °C	1,141 mm	20	89
1945	32.1 °C4 August 1945	-9.5 °C27 February 1945	12.4 °C	1,537 mm	10	95
1944	31.6 °C3 August 1944	-5.3 °C3 February 1944	13.1 °C	1,275 mm	12	84
1943	31.2 °C4 August 1943	-7.1 °C1 February 1943	12.7 °C	730 mm	12	87
1942	34.2 °C11 July 1942	-6.5 °C14 February 1942	13.1 °C	944 mm	24	77
1941	30.4 °C18 August 1941	-5.4 °C9 February 1941	12.6 °C	1,505 mm	5	78
1940	32.1 °C25 July 1940	-6.8 °C10 February 1940	12.5 °C	1,018 mm	17	91

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

20.1 °C

+2.0 °C

Hot days (≥ 30 °C)

67 d/yr

+39

Frost days (< 0 °C)

65 d/yr

+13

Annual rainfall

1211 mm

-235 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	9.6 °C	+2.1 °C	39 mm	-8 mm
Feb	9.2 °C	+0.9 °C	6 mm	-51 mm
Mar	14.1 °C	+2.4 °C	148 mm	+47 mm
Apr	18.8 °C	+1.7 °C	121 mm	+4 mm
May	21.6 °C	+0.2 °C	212 mm	+74 mm
Jun	27.5 °C	+3.4 °C	149 mm	-17 mm
Jul	31.2 °C	+3.4 °C	105 mm	-77 mm
Aug	32.0 °C	+2.7 °C	81 mm	-75 mm
Sep	28.9 °C	+3.5 °C	113 mm	-72 mm
Oct	20.8 °C	+0.8 °C	121 mm	-39 mm
Nov	16.1 °C	+1.2 °C	46 mm	-39 mm
Dec	11.1 °C	+1.2 °C	72 mm	+18 mm

The year's extremes

Hottest day

36.0 °C

2 Sep 2025

Coldest day

-5.2 °C

23 Feb 2025

Wettest day

59.2 mm

2 May 2025

Windiest day

30.6 km/h

13 Feb 2025

Strongest gust

83.9 km/h

1 Nov 2025

Hottest feels-like

42.3 °C

26 Jul 2025

Coldest feels-like

-9.0 °C

23 Feb 2025

Snowiest day

5.0 cm

3 Mar 2025

Sunniest day

13.9 h

28 Jun 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 Kasama?

Kasama has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 13.9 °C and it receives 1,446 mm of precipitation per year.

What is the hottest day ever recorded in Kasama?

The hottest day measured in Kasama between 1940 and 2025 was 4 August 1994, reaching 37.3 °C.

What is the coldest day in Kasama?

The coldest day measured in Kasama between 1940 and 2025 was 22 February 1968, at -14.6 °C.

Does it snow in Kasama?

Yes. Kasama gets on average 20.4 cm of snow per year and has around 52 frost days.

Has the climate of Kasama warmed?

Yes: Kasama warmed by +2.3 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Kasama?

The wettest day measured in Kasama between 1940 and 2025 was 26 September 1958, with 171 mm of rain in 24 hours.

What was the windiest day in Kasama?

The windiest day measured in Kasama between 1940 and 2025 was 1 October 2018, with winds reaching 52.8 km/h.

What is the warmest month in Kasama?

The warmest month in Kasama is August (25.5 °C on average); the coldest is January (3.0 °C).

How much does it rain in Kasama?

Kasama receives on average 1,446 mm of precipitation per year, spread over about 149 rainy days.

Is it sunny in Kasama?

Kasama gets on average 8.3 hours of sunshine per day, roughly 3,030 hours per year over 1940-2025.

What is the biggest single-day snowfall in Kasama?

The heaviest 24-hour snowfall measured in Kasama between 1940 and 2025 was 8 February 2014, with 31.9 cm.

Are there tropical nights in Kasama?

Yes: Kasama has on average 65 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Kasama?

In Kasama, between 1940 and 2025, the highest apparent temperature reached 44.7 °C on 16 August 2007, and the lowest was -18.9 °C on 17 February 1967.

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