Chiayi City climate — normals and trends

Q: What is the climate of Chiayi City?

Chiayi City has a humid subtropical, dry winter climate (Köppen Cwa). Over 1940-2025, the average annual temperature is 21.5 °C and it receives 2,898 mm of precipitation per year.

Q: What is the hottest day ever recorded in Chiayi City?

The hottest day measured in Chiayi City between 1940 and 2025 was 15 May 2021, reaching 33.1 °C.

Q: What is the coldest day in Chiayi City?

The coldest day measured in Chiayi City between 1940 and 2025 was 1 February 1970, at 0.6 °C.

Q: Does it snow in Chiayi City?

Almost never: Chiayi City sees virtually no snow, with about 0 frost days per year.

Q: Has the climate of Chiayi City warmed?

Yes: Chiayi City warmed by +2.1 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Chiayi City?

The wettest day measured in Chiayi City between 1940 and 2025 was 25 July 2024, with 466 mm of rain in 24 hours.

Q: What was the windiest day in Chiayi City?

The windiest day measured in Chiayi City between 1940 and 2025 was 27 September 1969, with winds reaching 52.0 km/h.

Q: What is the warmest month in Chiayi City?

The warmest month in Chiayi City is July (26.2 °C on average); the coldest is January (15.1 °C).

Q: How much does it rain in Chiayi City?

Chiayi City receives on average 2,898 mm of precipitation per year, spread over about 220 rainy days.

Q: Is it sunny in Chiayi City?

Chiayi City gets on average 9.9 hours of sunshine per day, roughly 3,614 hours per year over 1940-2025.

Chiayi City (Taiwan) has a humid subtropical, dry winter climate (Cwa) under the Köppen-Geiger classification. Its mean annual temperature is 21.5 °C and it receives 2,898 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 July (26.2 °C on average) and the coldest is January (15.1 °C). Rainfall peaks in August.

Chiayi City averages 0 frost days, 47 hot days (≥ 30 °C) and 220 rainy days per year.

Chiayi City has warmed by +2.1 °C between 1940 and 2025, or +0.24 °C per decade. This trend is statistically significant.

The hottest day of the period reached 33.1 °C (on 15 May 2021) and the coldest 0.6 °C (on 1 February 1970).

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

Chiayi CityTaiwan

coords: 23.48°, 120.45°
period: 1940–2025 · 86 yrs

CwaHumid subtropical, dry winterWarmest monthJulyColdest monthJanuaryWettest monthAugustDriest monthJanuary

Mean daily temperature

21.5°C

Average daily high

25.6°C

Average daily low

18.0°C

Annual rainfall

2,898mm

Sunshine / day

9.9h

Mean relative humidity

82%

Average peak wind

10.7km/h

Seasonal range

11.1°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

47 d/yr

Rainy days (≥ 1 mm)

220 d/yr

Annual snowfall

0.0 cm

Average feels-like high

29.2 °C

Average feels-like low

19.7 °C

Average peak gust

28.8 km/h

Tropical nights (≥ 20 °C)

160 d/yr

Solar radiation

17.3 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+2.1 °C

since 1940

+0.2 °C per decade · r² = 0.82 · 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

33.1 °C

15 May 2021

Coldest day

0.6 °C

1 February 1970

Wettest day

466 mm

25 July 2024

Windiest day

52.0 km/h

27 September 1969

Strongest gust

143.6 km/h

8 August 2015

Hottest feels-like

41.2 °C

1 August 2010

Coldest feels-like

-2.4 °C

1 February 1970

Sunniest day

13.4 h

16 June 2006

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days
2025	32.4 °C21 May 2025	6.1 °C13 January 2025	22.6 °C	3,123 mm	103
2024	32.4 °C22 June 2024	8.1 °C24 January 2024	22.9 °C	3,041 mm	103
2023	31.8 °C17 July 2023	7.2 °C24 January 2023	22.4 °C	2,773 mm	67
2022	32.0 °C24 July 2022	6.0 °C25 December 2022	22.1 °C	2,335 mm	64
2021	33.1 °C15 May 2021	6.2 °C10 January 2021	22.3 °C	2,459 mm	84
2020	31.9 °C6 August 2020	5.9 °C1 February 2020	22.6 °C	1,943 mm	101
2019	32.1 °C18 June 2019	9.5 °C23 January 2019	22.7 °C	2,693 mm	65
2018	31.4 °C28 May 2018	4.3 °C13 January 2018	22.3 °C	3,030 mm	54
2017	31.8 °C21 June 2017	9.9 °C10 February 2017	22.5 °C	2,663 mm	96
2016	31.9 °C28 June 2016	3.0 °C25 January 2016	22.4 °C	3,606 mm	80
2015	31.9 °C26 June 2015	5.6 °C23 January 2015	22.3 °C	2,802 mm	58
2014	32.5 °C9 July 2014	4.9 °C21 February 2014	22.2 °C	2,225 mm	92
2013	32.0 °C23 July 2013	8.7 °C28 December 2013	22.4 °C	3,243 mm	64
2012	31.9 °C14 May 2012	8.2 °C31 December 2012	22.4 °C	4,279 mm	59
2011	32.6 °C10 June 2011	8.1 °C2 January 2011	22.0 °C	2,885 mm	64
2010	32.3 °C9 August 2010	5.7 °C14 January 2010	22.3 °C	3,018 mm	72
2009	31.5 °C12 September 2009	4.0 °C14 January 2009	22.3 °C	3,541 mm	71
2008	32.2 °C21 July 2008	8.5 °C9 February 2008	22.2 °C	3,574 mm	71
2007	32.2 °C22 June 2007	4.1 °C29 January 2007	22.5 °C	3,702 mm	68
2006	32.3 °C6 July 2006	7.6 °C18 December 2006	22.6 °C	2,948 mm	59
2005	33.0 °C5 May 2005	4.6 °C6 March 2005	22.2 °C	3,615 mm	77
2004	31.7 °C12 May 2004	6.2 °C24 January 2004	22.0 °C	2,857 mm	65
2003	31.8 °C7 August 2003	8.5 °C15 December 2003	22.1 °C	2,779 mm	62
2002	31.5 °C26 July 2002	7.5 °C3 January 2002	22.3 °C	2,406 mm	52
2001	32.0 °C30 June 2001	6.6 °C25 December 2001	22.1 °C	4,075 mm	58
2000	31.5 °C31 August 2000	8.3 °C28 January 2000	22.0 °C	2,970 mm	41
1999	31.5 °C22 August 1999	4.4 °C22 December 1999	21.9 °C	2,751 mm	23
1998	31.9 °C20 July 1998	9.8 °C19 January 1998	22.6 °C	3,155 mm	67
1997	31.0 °C30 July 1997	6.6 °C12 January 1997	21.7 °C	2,524 mm	31
1996	32.2 °C21 July 1996	6.1 °C2 January 1996	21.6 °C	2,500 mm	49
1995	31.6 °C25 June 1995	7.3 °C5 February 1995	21.5 °C	2,570 mm	57
1994	32.1 °C13 July 1994	7.3 °C24 January 1994	22.1 °C	3,356 mm	42
1993	32.2 °C27 June 1993	5.5 °C31 January 1993	21.8 °C	2,239 mm	56
1992	31.2 °C17 June 1992	6.1 °C15 January 1992	21.4 °C	3,333 mm	25
1991	32.2 °C11 July 1991	6.9 °C29 December 1991	21.9 °C	2,260 mm	76
1990	31.6 °C15 June 1990	9.3 °C5 January 1990	22.0 °C	3,335 mm	53
1989	31.5 °C21 July 1989	6.7 °C1 December 1989	21.5 °C	3,249 mm	63
1988	32.1 °C7 May 1988	5.9 °C13 December 1988	21.6 °C	2,997 mm	80
1987	32.1 °C7 July 1987	5.6 °C14 January 1987	21.8 °C	2,134 mm	57
1986	31.2 °C28 June 1986	3.3 °C3 March 1986	21.3 °C	3,119 mm	44
1985	30.9 °C30 July 1985	3.9 °C17 December 1985	21.3 °C	3,080 mm	14
1984	31.0 °C29 July 1984	6.6 °C2 January 1984	21.1 °C	2,740 mm	23
1983	32.7 °C5 July 1983	8.3 °C24 January 1983	21.5 °C	2,446 mm	72
1982	31.7 °C17 July 1982	6.6 °C19 January 1982	21.4 °C	2,812 mm	39
1981	31.7 °C3 July 1981	4.9 °C14 January 1981	21.5 °C	3,800 mm	41
1980	32.4 °C25 July 1980	5.6 °C24 December 1980	21.7 °C	1,984 mm	71
1979	32.4 °C4 July 1979	8.0 °C4 March 1979	21.5 °C	3,047 mm	61
1978	31.6 °C10 June 1978	4.2 °C18 February 1978	21.7 °C	4,125 mm	68
1977	32.4 °C4 May 1977	4.6 °C18 February 1977	21.6 °C	3,580 mm	74
1976	31.4 °C22 July 1976	8.0 °C14 January 1976	21.2 °C	3,259 mm	41
1975	31.6 °C19 June 1975	5.9 °C24 December 1975	21.6 °C	3,284 mm	70
1974	31.4 °C4 July 1974	5.7 °C2 January 1974	21.5 °C	3,579 mm	37
1973	31.6 °C31 May 1973	3.1 °C26 December 1973	21.7 °C	3,490 mm	46
1972	31.6 °C29 June 1972	3.8 °C4 March 1972	21.2 °C	3,619 mm	33
1971	31.5 °C18 June 1971	2.9 °C10 January 1971	21.0 °C	2,788 mm	42
1970	32.0 °C19 June 1970	0.6 °C1 February 1970	21.3 °C	2,769 mm	55
1969	31.9 °C29 June 1969	6.1 °C6 February 1969	21.3 °C	2,672 mm	62
1968	31.4 °C18 July 1968	5.9 °C4 March 1968	20.8 °C	3,102 mm	43
1967	31.2 °C26 June 1967	3.0 °C16 January 1967	20.9 °C	2,694 mm	52
1966	30.5 °C15 August 1966	7.6 °C2 January 1966	21.2 °C	2,643 mm	2
1965	30.9 °C17 April 1965	4.0 °C10 January 1965	20.7 °C	2,436 mm	1
1964	30.5 °C5 April 1964	8.4 °C20 December 1964	21.2 °C	3,167 mm	12
1963	31.8 °C8 May 1963	2.6 °C27 January 1963	20.7 °C	2,827 mm	26
1962	32.5 °C1 June 1962	4.6 °C28 January 1962	20.8 °C	2,166 mm	32
1961	30.6 °C10 June 1961	5.0 °C18 January 1961	21.2 °C	3,335 mm	10
1960	31.2 °C18 July 1960	6.0 °C31 December 1960	21.6 °C	3,768 mm	36
1959	31.6 °C5 July 1959	3.2 °C18 January 1959	21.6 °C	2,160 mm	55
1958	31.7 °C24 April 1958	3.2 °C13 February 1958	21.3 °C	2,769 mm	56
1957	31.6 °C16 July 1957	6.1 °C19 January 1957	21.2 °C	2,329 mm	57
1956	31.6 °C4 June 1956	6.0 °C9 January 1956	21.1 °C	3,274 mm	50
1955	30.9 °C19 May 1955	3.6 °C22 February 1955	20.8 °C	2,209 mm	24
1954	31.7 °C25 May 1954	6.8 °C17 December 1954	21.4 °C	2,109 mm	69
1953	31.4 °C12 August 1953	5.5 °C8 January 1953	21.4 °C	2,947 mm	38
1952	31.1 °C4 May 1952	4.6 °C9 January 1952	21.4 °C	2,389 mm	20
1951	30.6 °C31 July 1951	5.3 °C16 December 1951	20.9 °C	3,023 mm	4
1950	30.8 °C18 July 1950	4.2 °C10 December 1950	20.6 °C	3,016 mm	3
1949	31.6 °C23 May 1949	4.3 °C10 January 1949	21.3 °C	2,513 mm	32
1948	30.5 °C1 July 1948	3.9 °C4 January 1948	20.7 °C	2,886 mm	3
1947	30.7 °C6 July 1947	7.3 °C29 January 1947	20.5 °C	2,903 mm	9
1946	30.8 °C12 May 1946	5.1 °C9 February 1946	20.9 °C	2,457 mm	6
1945	29.5 °C24 July 1945	6.7 °C28 December 1945	20.2 °C	2,645 mm	0
1944	29.8 °C7 April 1944	7.3 °C14 March 1944	20.5 °C	3,113 mm	0
1943	31.3 °C8 May 1943	5.7 °C14 January 1943	20.1 °C	1,548 mm	5
1942	29.9 °C11 August 1942	6.2 °C6 December 1942	20.5 °C	2,206 mm	0
1941	29.1 °C19 August 1941	4.1 °C5 February 1941	20.7 °C	2,689 mm	0
1940	29.0 °C24 June 1940	5.1 °C4 January 1940	20.0 °C	2,698 mm	0

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

26.4 °C

+0.8 °C

Hot days (≥ 30 °C)

103 d/yr

+56

Frost days (< 0 °C)

0 d/yr

Annual rainfall

3123 mm

+225 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	19.5 °C	-0.4 °C	53 mm	+6 mm
Feb	20.5 °C	-0.4 °C	91 mm	+30 mm
Mar	23.7 °C	+0.4 °C	82 mm	+5 mm
Apr	26.5 °C	+0.5 °C	70 mm	-53 mm
May	29.3 °C	+1.3 °C	221 mm	-42 mm
Jun	30.1 °C	+1.1 °C	502 mm	+102 mm
Jul	29.3 °C	-0.3 °C	809 mm	+317 mm
Aug	30.1 °C	+0.9 °C	527 mm	-96 mm
Sep	29.9 °C	+1.3 °C	427 mm	-38 mm
Oct	28.8 °C	+2.0 °C	226 mm	+9 mm
Nov	25.5 °C	+1.0 °C	65 mm	-14 mm
Dec	23.0 °C	+1.7 °C	50 mm	-2 mm

The year's extremes

Hottest day

32.4 °C

21 May 2025

Coldest day

6.1 °C

13 Jan 2025

Wettest day

89.8 mm

12 Jun 2025

Windiest day

35.5 km/h

13 Aug 2025

Strongest gust

106.2 km/h

13 Aug 2025

Hottest feels-like

40.0 °C

3 Jul 2025

Coldest feels-like

4.1 °C

13 Jan 2025

Sunniest day

13.2 h

15 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 Chiayi City?

Chiayi City has a humid subtropical, dry winter climate (Köppen Cwa). Over 1940-2025, the average annual temperature is 21.5 °C and it receives 2,898 mm of precipitation per year.

What is the hottest day ever recorded in Chiayi City?

The hottest day measured in Chiayi City between 1940 and 2025 was 15 May 2021, reaching 33.1 °C.

What is the coldest day in Chiayi City?

The coldest day measured in Chiayi City between 1940 and 2025 was 1 February 1970, at 0.6 °C.

Does it snow in Chiayi City?

Almost never: Chiayi City sees virtually no snow, with about 0 frost days per year.

Has the climate of Chiayi City warmed?

Yes: Chiayi City warmed by +2.1 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Chiayi City?

The wettest day measured in Chiayi City between 1940 and 2025 was 25 July 2024, with 466 mm of rain in 24 hours.

What was the windiest day in Chiayi City?

The windiest day measured in Chiayi City between 1940 and 2025 was 27 September 1969, with winds reaching 52.0 km/h.

What is the warmest month in Chiayi City?

The warmest month in Chiayi City is July (26.2 °C on average); the coldest is January (15.1 °C).

How much does it rain in Chiayi City?

Chiayi City receives on average 2,898 mm of precipitation per year, spread over about 220 rainy days.

Is it sunny in Chiayi City?

Chiayi City gets on average 9.9 hours of sunshine per day, roughly 3,614 hours per year over 1940-2025.

Are there tropical nights in Chiayi City?

Yes: Chiayi City has on average 160 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Chiayi City?

In Chiayi City, between 1940 and 2025, the highest apparent temperature reached 41.2 °C on 1 August 2010, and the lowest was -2.4 °C on 1 February 1970.

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