West Bay climate — normals and trends

Q: What is the climate of West Bay?

West Bay has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 26.6 °C and it receives 964 mm of precipitation per year.

Q: What is the hottest day ever recorded in West Bay?

The hottest day measured in West Bay between 1940 and 2025 was 5 August 2023, reaching 30.9 °C.

Q: What is the coldest day in West Bay?

The coldest day measured in West Bay between 1940 and 2025 was 13 January 1981, at 18.6 °C.

Q: Does it snow in West Bay?

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

Q: Has the climate of West Bay warmed?

Yes: West Bay warmed by +0.8 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in West Bay?

The wettest day measured in West Bay between 1940 and 2025 was 12 September 2004, with 277 mm of rain in 24 hours.

Q: What was the windiest day in West Bay?

The windiest day measured in West Bay between 1940 and 2025 was 12 September 2004, with winds reaching 140.1 km/h.

Q: What is the warmest month in West Bay?

The warmest month in West Bay is August (28.1 °C on average); the coldest is January (25.0 °C).

Q: How much does it rain in West Bay?

West Bay receives on average 964 mm of precipitation per year, spread over about 149 rainy days.

Q: Is it sunny in West Bay?

West Bay gets on average 11.2 hours of sunshine per day, roughly 4,088 hours per year over 1940-2025.

West Bay (Cayman Islands) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 26.6 °C and it receives 964 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 (28.1 °C on average) and the coldest is January (25.0 °C). Rainfall peaks in October.

West Bay averages 0 frost days, 2 hot days (≥ 30 °C) and 149 rainy days per year.

West Bay has warmed by +0.8 °C between 1940 and 2025, or +0.09 °C per decade. This trend is statistically significant.

The hottest day of the period reached 30.9 °C (on 5 August 2023) and the coldest 18.6 °C (on 13 January 1981).

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

West BayWest Bay

coords: 19.38°, -81.39°
period: 1940–2025 · 86 yrs

AwTropical savannaWarmest monthAugustColdest monthJanuaryWettest monthOctoberDriest monthMarch

Mean daily temperature

26.6°C

Average daily high

27.2°C

Average daily low

25.8°C

Annual rainfall

964mm

Sunshine / day

11.2h

Mean relative humidity

79%

Average peak wind

27.1km/h

Seasonal range

3.1°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

2 d/yr

Rainy days (≥ 1 mm)

149 d/yr

Annual snowfall

0.0 cm

Average feels-like high

30.5 °C

Average feels-like low

27.5 °C

Average peak gust

37.3 km/h

Tropical nights (≥ 20 °C)

364 d/yr

Solar radiation

20.5 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+0.8 °C

since 1940

+0.1 °C per decade · r² = 0.46 · 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

30.9 °C

5 August 2023

Coldest day

18.6 °C

13 January 1981

Wettest day

277 mm

12 September 2004

Windiest day

140.1 km/h

12 September 2004

Strongest gust

205.6 km/h

12 September 2004

Hottest feels-like

39.0 °C

11 September 2024

Coldest feels-like

13.4 °C

10 January 1970

Sunniest day

13.0 h

5 June 1940

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days
2025	30.7 °C28 August 2025	23.0 °C25 January 2025	27.6 °C	520 mm	37
2024	30.7 °C21 August 2024	22.0 °C6 February 2024	27.6 °C	1,473 mm	36
2023	30.9 °C5 August 2023	21.9 °C15 January 2023	27.6 °C	717 mm	63
2022	30.0 °C11 September 2022	20.7 °C30 January 2022	27.0 °C	852 mm	1
2021	29.9 °C7 August 2021	22.0 °C2 February 2021	27.1 °C	593 mm	0
2020	30.2 °C30 July 2020	20.9 °C23 January 2020	27.3 °C	1,203 mm	4
2019	30.3 °C10 August 2019	22.0 °C14 February 2019	27.2 °C	644 mm	8
2018	29.6 °C25 August 2018	22.4 °C5 January 2018	26.8 °C	927 mm	0
2017	29.9 °C4 August 2017	22.3 °C11 December 2017	26.9 °C	1,329 mm	0
2016	30.1 °C10 August 2016	22.2 °C24 January 2016	27.2 °C	827 mm	1
2015	30.2 °C27 August 2015	19.5 °C20 February 2015	27.1 °C	865 mm	3
2014	30.2 °C25 August 2014	22.1 °C18 January 2014	27.0 °C	700 mm	1
2013	29.5 °C26 July 2013	21.5 °C18 February 2013	26.9 °C	956 mm	0
2012	29.6 °C14 September 2012	20.3 °C4 January 2012	26.7 °C	877 mm	0
2011	29.9 °C10 August 2011	22.2 °C29 January 2011	26.7 °C	931 mm	0
2010	30.1 °C12 September 2010	19.0 °C11 January 2010	26.5 °C	1,063 mm	1
2009	30.2 °C6 September 2009	20.3 °C5 February 2009	26.7 °C	679 mm	3
2008	29.8 °C9 August 2008	20.9 °C3 January 2008	26.7 °C	1,036 mm	0
2007	29.8 °C2 August 2007	20.6 °C19 February 2007	26.8 °C	1,093 mm	0
2006	29.7 °C13 August 2006	21.3 °C14 February 2006	26.7 °C	874 mm	0
2005	30.0 °C12 September 2005	21.3 °C12 February 2005	26.6 °C	1,410 mm	1
2004	29.6 °C3 August 2004	21.9 °C19 February 2004	26.6 °C	781 mm	0
2003	29.5 °C10 August 2003	21.3 °C25 January 2003	26.8 °C	829 mm	0
2002	29.6 °C4 August 2002	20.7 °C9 January 2002	26.8 °C	984 mm	0
2001	29.7 °C20 August 2001	20.9 °C24 January 2001	26.4 °C	981 mm	0
2000	29.5 °C23 August 2000	21.2 °C10 February 2000	26.3 °C	732 mm	0
1999	29.6 °C11 August 1999	20.9 °C27 December 1999	26.4 °C	1,243 mm	0
1998	30.4 °C24 August 1998	22.1 °C11 March 1998	27.0 °C	1,005 mm	6
1997	29.6 °C22 August 1997	19.7 °C19 January 1997	26.8 °C	672 mm	0
1996	29.3 °C26 July 1996	20.0 °C5 February 1996	26.3 °C	1,420 mm	0
1995	29.9 °C4 September 1995	21.3 °C5 February 1995	26.7 °C	1,037 mm	0
1994	29.2 °C17 August 1994	22.2 °C4 March 1994	26.7 °C	627 mm	0
1993	29.5 °C31 July 1993	21.3 °C14 March 1993	26.5 °C	906 mm	0
1992	29.1 °C7 July 1992	21.9 °C8 February 1992	26.5 °C	632 mm	0
1991	29.3 °C13 July 1991	21.3 °C17 February 1991	26.6 °C	704 mm	0
1990	29.8 °C3 August 1990	22.8 °C28 February 1990	26.6 °C	851 mm	0
1989	29.3 °C22 August 1989	19.5 °C25 February 1989	26.4 °C	680 mm	0
1988	29.5 °C6 August 1988	21.1 °C28 January 1988	26.4 °C	1,180 mm	0
1987	29.6 °C28 September 1987	21.4 °C14 March 1987	26.6 °C	780 mm	0
1986	28.9 °C31 July 1986	20.0 °C2 March 1986	26.2 °C	604 mm	0
1985	29.1 °C6 August 1985	19.7 °C23 January 1985	26.2 °C	612 mm	0
1984	28.9 °C21 August 1984	21.6 °C1 March 1984	26.2 °C	811 mm	0
1983	29.7 °C27 July 1983	21.0 °C26 December 1983	26.7 °C	951 mm	0
1982	29.1 °C18 August 1982	22.4 °C18 December 1982	26.5 °C	902 mm	0
1981	29.3 °C30 July 1981	18.6 °C13 January 1981	26.2 °C	893 mm	0
1980	29.3 °C13 July 1980	19.6 °C4 March 1980	26.5 °C	1,034 mm	0
1979	29.4 °C13 August 1979	22.4 °C26 February 1979	26.4 °C	1,159 mm	0
1978	29.3 °C17 September 1978	19.8 °C23 February 1978	26.4 °C	1,101 mm	0
1977	29.4 °C8 September 1977	19.4 °C20 January 1977	26.4 °C	1,095 mm	0
1976	28.9 °C6 August 1976	21.4 °C18 January 1976	26.2 °C	1,044 mm	0
1975	29.1 °C9 September 1975	21.4 °C24 December 1975	26.4 °C	848 mm	0
1974	29.1 °C31 August 1974	19.9 °C27 February 1974	26.1 °C	974 mm	0
1973	29.2 °C15 August 1973	20.5 °C12 February 1973	26.4 °C	961 mm	0
1972	29.0 °C11 August 1972	20.4 °C21 February 1972	26.5 °C	1,254 mm	0
1971	28.9 °C28 August 1971	19.8 °C21 January 1971	26.3 °C	1,177 mm	0
1970	29.6 °C23 August 1970	19.1 °C10 January 1970	26.3 °C	1,193 mm	0
1969	30.0 °C7 August 1969	21.5 °C20 February 1969	26.6 °C	1,323 mm	1
1968	29.3 °C13 August 1968	21.0 °C26 February 1968	26.1 °C	1,481 mm	0
1967	29.2 °C5 September 1967	20.7 °C26 February 1967	26.3 °C	944 mm	0
1966	29.6 °C13 August 1966	19.9 °C28 January 1966	26.3 °C	1,506 mm	0
1965	29.2 °C11 September 1965	20.0 °C18 January 1965	26.3 °C	847 mm	0
1964	30.6 °C24 August 1964	21.0 °C15 January 1964	26.5 °C	1,431 mm	2
1963	29.5 °C30 August 1963	21.0 °C3 January 1963	26.4 °C	938 mm	0
1962	29.4 °C25 July 1962	21.1 °C7 March 1962	26.4 °C	897 mm	0
1961	29.5 °C11 August 1961	21.9 °C11 March 1961	26.5 °C	1,349 mm	0
1960	29.3 °C26 August 1960	20.6 °C22 January 1960	26.5 °C	1,095 mm	0
1959	29.3 °C13 August 1959	21.6 °C30 November 1959	26.7 °C	1,050 mm	0
1958	29.6 °C18 August 1958	20.0 °C9 February 1958	26.6 °C	1,140 mm	0
1957	29.3 °C15 August 1957	22.0 °C12 December 1957	26.5 °C	732 mm	0
1956	29.1 °C19 August 1956	20.7 °C9 January 1956	26.2 °C	582 mm	0
1955	29.3 °C14 August 1955	21.7 °C18 February 1955	26.2 °C	851 mm	0
1954	29.1 °C5 August 1954	22.0 °C8 February 1954	26.3 °C	1,064 mm	0
1953	29.4 °C22 August 1953	21.2 °C26 January 1953	26.5 °C	1,240 mm	0
1952	29.3 °C12 September 1952	20.7 °C17 December 1952	26.4 °C	1,077 mm	0
1951	29.3 °C6 August 1951	20.0 °C4 February 1951	26.3 °C	991 mm	0
1950	28.9 °C18 August 1950	20.7 °C7 April 1950	25.9 °C	1,026 mm	0
1949	28.7 °C23 July 1949	21.3 °C1 January 1949	26.2 °C	812 mm	0
1948	29.0 °C16 August 1948	19.8 °C15 January 1948	26.6 °C	1,188 mm	0
1947	29.1 °C16 July 1947	22.3 °C6 February 1947	26.7 °C	876 mm	0
1946	29.3 °C18 August 1946	22.7 °C21 March 1946	26.6 °C	700 mm	0
1945	29.0 °C17 August 1945	21.9 °C11 January 1945	26.2 °C	988 mm	0
1944	29.3 °C23 July 1944	22.4 °C19 January 1944	26.4 °C	1,290 mm	0
1943	29.3 °C25 August 1943	22.0 °C20 December 1943	26.2 °C	885 mm	0
1942	29.1 °C29 July 1942	22.6 °C3 March 1942	26.5 °C	1,024 mm	0
1941	29.4 °C13 October 1941	21.2 °C11 February 1941	26.6 °C	596 mm	0
1940	29.2 °C2 August 1940	20.6 °C28 January 1940	26.4 °C	758 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

28.2 °C

+1.0 °C

Hot days (≥ 30 °C)

37 d/yr

+35

Frost days (< 0 °C)

0 d/yr

Annual rainfall

520 mm

-444 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	26.5 °C	+0.8 °C	12 mm	-21 mm
Feb	26.7 °C	+1.1 °C	13 mm	-10 mm
Mar	26.9 °C	+1.0 °C	9 mm	-9 mm
Apr	27.0 °C	+0.4 °C	30 mm	+9 mm
May	28.5 °C	+1.1 °C	12 mm	-78 mm
Jun	29.0 °C	+0.9 °C	75 mm	-43 mm
Jul	29.5 °C	+0.9 °C	25 mm	-45 mm
Aug	30.0 °C	+1.2 °C	32 mm	-63 mm
Sep	29.9 °C	+1.3 °C	59 mm	-86 mm
Oct	29.0 °C	+1.0 °C	147 mm	-46 mm
Nov	27.8 °C	+0.7 °C	82 mm	-31 mm
Dec	27.3 °C	+1.0 °C	25 mm	-24 mm

The year's extremes

Hottest day

30.7 °C

28 Aug 2025

Coldest day

23.0 °C

25 Jan 2025

Wettest day

21.6 mm

13 Oct 2025

Windiest day

48.5 km/h

11 Nov 2025

Strongest gust

64.8 km/h

11 Nov 2025

Hottest feels-like

38.6 °C

20 Aug 2025

Coldest feels-like

21.1 °C

25 Jan 2025

Sunniest day

13.0 h

4 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 West Bay?

West Bay has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 26.6 °C and it receives 964 mm of precipitation per year.

What is the hottest day ever recorded in West Bay?

The hottest day measured in West Bay between 1940 and 2025 was 5 August 2023, reaching 30.9 °C.

What is the coldest day in West Bay?

The coldest day measured in West Bay between 1940 and 2025 was 13 January 1981, at 18.6 °C.

Does it snow in West Bay?

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

Has the climate of West Bay warmed?

Yes: West Bay warmed by +0.8 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in West Bay?

The wettest day measured in West Bay between 1940 and 2025 was 12 September 2004, with 277 mm of rain in 24 hours.

What was the windiest day in West Bay?

The windiest day measured in West Bay between 1940 and 2025 was 12 September 2004, with winds reaching 140.1 km/h.

What is the warmest month in West Bay?

The warmest month in West Bay is August (28.1 °C on average); the coldest is January (25.0 °C).

How much does it rain in West Bay?

West Bay receives on average 964 mm of precipitation per year, spread over about 149 rainy days.

Is it sunny in West Bay?

West Bay gets on average 11.2 hours of sunshine per day, roughly 4,088 hours per year over 1940-2025.

Are there tropical nights in West Bay?

Yes: West Bay has on average 364 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in West Bay?

In West Bay, between 1940 and 2025, the highest apparent temperature reached 39.0 °C on 11 September 2024, and the lowest was 13.4 °C on 10 January 1970.

Compare West Bay with another city

Pick a second city: its normals will be set against these, indicator by indicator.

Nearby cities

The climate around West Bay

George Town11 km away

Other cities — Cayman Islands

George Town29,370

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