Merritt Island climate — normals and trends

Q: What is the climate of Merritt Island?

Merritt Island has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 22.6 °C and it receives 968 mm of precipitation per year.

Q: What is the hottest day ever recorded in Merritt Island?

The hottest day measured in Merritt Island between 1940 and 2025 was 25 June 1944, reaching 34.3 °C.

Q: What is the coldest day in Merritt Island?

The coldest day measured in Merritt Island between 1940 and 2025 was 24 December 1989, at -2.5 °C.

Q: Does it snow in Merritt Island?

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

Q: Has the climate of Merritt Island warmed?

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

Q: What is the wettest day in Merritt Island?

The wettest day measured in Merritt Island between 1940 and 2025 was 3 November 1987, with 168 mm of rain in 24 hours.

Q: What was the windiest day in Merritt Island?

The windiest day measured in Merritt Island between 1940 and 2025 was 5 September 2004, with winds reaching 96.0 km/h.

Q: What is the warmest month in Merritt Island?

The warmest month in Merritt Island is July (27.0 °C on average); the coldest is January (17.2 °C).

Q: How much does it rain in Merritt Island?

Merritt Island receives on average 968 mm of precipitation per year, spread over about 147 rainy days.

Q: Is it sunny in Merritt Island?

Merritt Island gets on average 10.3 hours of sunshine per day, roughly 3,760 hours per year over 1940-2025.

Merritt Island (United States) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 22.6 °C and it receives 968 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 (27.0 °C on average) and the coldest is January (17.2 °C). Rainfall peaks in September.

Merritt Island averages 0 frost days, 32 hot days (≥ 30 °C) and 147 rainy days per year.

Merritt Island has warmed by +0.8 °C between 1940 and 2025, or +0.10 °C per decade. This trend is statistically significant.

The hottest day of the period reached 34.3 °C (on 25 June 1944) and the coldest -2.5 °C (on 24 December 1989).

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

Merritt IslandFlorida

coords: 28.36°, -80.69°
period: 1940–2025 · 86 yrs

CfaHumid subtropicalWarmest monthJulyColdest monthJanuaryWettest monthSeptemberDriest monthDecember

Mean daily temperature

22.6°C

Average daily high

25.2°C

Average daily low

20.3°C

Annual rainfall

968mm

Sunshine / day

10.3h

Mean relative humidity

76%

Average peak wind

20.8km/h

Seasonal range

9.8°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

32 d/yr

Rainy days (≥ 1 mm)

147 d/yr

Annual snowfall

0.0 cm

Average feels-like high

27.3 °C

Average feels-like low

21.1 °C

Average peak gust

33.4 km/h

Tropical nights (≥ 20 °C)

219 d/yr

Solar radiation

17.6 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+0.8 °C

since 1940

+0.1 °C per decade · r² = 0.22 · 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

34.3 °C

25 June 1944

Coldest day

-2.5 °C

24 December 1989

Wettest day

168 mm

3 November 1987

Windiest day

96.0 km/h

5 September 2004

Strongest gust

145.4 km/h

5 September 2004

Hottest feels-like

42.7 °C

8 August 2023

Coldest feels-like

-10.7 °C

24 December 1989

Snowiest day

0.1 cm

9 January 2010

Sunniest day

13.1 h

6 June 2023

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days	Frost days
2025	32.7 °C29 July 2025	6.3 °C31 December 2025	23.2 °C	1,115 mm	57	0
2024	32.2 °C10 May 2024	9.0 °C21 January 2024	23.4 °C	1,202 mm	64	0
2023	33.9 °C8 August 2023	6.1 °C15 January 2023	23.8 °C	1,063 mm	63	0
2022	32.6 °C23 June 2022	2.6 °C25 December 2022	23.5 °C	1,328 mm	58	0
2021	32.4 °C31 July 2021	6.4 °C3 February 2021	23.3 °C	1,103 mm	35	0
2020	32.7 °C13 July 2020	5.8 °C26 December 2020	23.8 °C	1,272 mm	65	0
2019	32.9 °C5 September 2019	6.9 °C21 January 2019	23.6 °C	1,310 mm	55	0
2018	32.2 °C15 September 2018	2.0 °C18 January 2018	23.2 °C	1,188 mm	43	0
2017	32.1 °C28 July 2017	7.6 °C10 December 2017	23.5 °C	1,153 mm	44	0
2016	32.7 °C6 July 2016	3.9 °C24 January 2016	23.4 °C	1,216 mm	58	0
2015	32.3 °C11 September 2015	3.8 °C20 February 2015	23.7 °C	936 mm	45	0
2014	32.1 °C3 July 2014	5.0 °C7 January 2014	22.6 °C	1,027 mm	36	0
2013	30.7 °C18 June 2013	5.3 °C4 March 2013	23.0 °C	1,028 mm	16	0
2012	32.4 °C25 July 2012	5.0 °C12 February 2012	23.1 °C	828 mm	46	0
2011	32.3 °C14 June 2011	5.9 °C13 January 2011	23.2 °C	893 mm	54	0
2010	32.7 °C30 July 2010	0.8 °C14 December 2010	22.0 °C	713 mm	67	0
2009	33.2 °C22 June 2009	2.3 °C5 February 2009	22.8 °C	835 mm	44	0
2008	32.6 °C11 May 2008	4.4 °C3 January 2008	22.7 °C	890 mm	24	0
2007	32.0 °C4 August 2007	5.6 °C17 February 2007	23.1 °C	913 mm	53	0
2006	32.1 °C11 August 2006	5.1 °C13 February 2006	22.8 °C	623 mm	28	0
2005	32.1 °C30 August 2005	6.3 °C24 January 2005	22.5 °C	1,107 mm	37	0
2004	32.2 °C14 July 2004	6.6 °C20 December 2004	22.6 °C	1,025 mm	31	0
2003	30.9 °C1 June 2003	2.1 °C24 January 2003	22.5 °C	975 mm	6	0
2002	31.2 °C17 July 2002	3.1 °C4 January 2002	22.8 °C	1,042 mm	25	0
2001	31.0 °C25 August 2001	3.9 °C1 January 2001	22.5 °C	1,129 mm	19	0
2000	31.8 °C20 July 2000	2.0 °C20 December 2000	22.5 °C	689 mm	28	0
1999	32.8 °C29 July 1999	5.6 °C5 January 1999	22.7 °C	1,034 mm	32	0
1998	34.0 °C13 June 1998	8.2 °C12 March 1998	23.1 °C	876 mm	66	0
1997	31.4 °C4 July 1997	3.9 °C19 January 1997	22.8 °C	977 mm	33	0
1996	31.2 °C21 July 1996	2.2 °C5 February 1996	22.1 °C	951 mm	17	0
1995	32.0 °C9 July 1995	3.6 °C9 February 1995	22.5 °C	1,192 mm	31	0
1994	31.7 °C24 June 1994	7.4 °C5 January 1994	23.1 °C	1,155 mm	12	0
1993	33.1 °C22 August 1993	3.0 °C14 March 1993	22.6 °C	1,041 mm	48	0
1992	32.2 °C28 July 1992	6.0 °C17 January 1992	22.5 °C	918 mm	32	0
1991	31.6 °C10 August 1991	2.1 °C16 February 1991	23.2 °C	907 mm	35	0
1990	32.8 °C23 September 1990	8.3 °C13 January 1990	23.6 °C	586 mm	41	0
1989	33.3 °C7 August 1989	-2.5 °C24 December 1989	22.8 °C	761 mm	43	1
1988	31.0 °C1 July 1988	5.9 °C18 December 1988	22.2 °C	937 mm	18	0
1987	32.2 °C29 July 1987	5.8 °C12 January 1987	22.4 °C	1,463 mm	52	0
1986	32.7 °C20 July 1986	-1.3 °C28 January 1986	22.9 °C	836 mm	21	1
1985	32.0 °C1 June 1985	-1.6 °C22 January 1985	22.5 °C	841 mm	26	2
1984	31.9 °C4 May 1984	5.2 °C1 March 1984	22.2 °C	871 mm	13	0
1983	32.3 °C25 July 1983	-0.6 °C26 December 1983	21.9 °C	1,510 mm	25	2
1982	31.1 °C1 July 1982	0.4 °C12 January 1982	23.0 °C	1,101 mm	29	0
1981	32.7 °C15 July 1981	1.6 °C13 January 1981	21.9 °C	564 mm	51	0
1980	33.1 °C13 July 1980	-0.6 °C3 March 1980	22.4 °C	719 mm	49	1
1979	32.5 °C31 July 1979	2.8 °C3 January 1979	22.5 °C	901 mm	29	0
1978	31.6 °C4 July 1978	2.9 °C15 January 1978	22.4 °C	897 mm	28	0
1977	32.1 °C26 June 1977	-0.3 °C19 January 1977	22.1 °C	827 mm	44	1
1976	31.5 °C16 July 1976	3.3 °C18 January 1976	22.0 °C	946 mm	20	0
1975	32.1 °C7 July 1975	4.7 °C22 December 1975	23.1 °C	724 mm	27	0
1974	31.3 °C23 June 1974	4.5 °C26 February 1974	22.9 °C	835 mm	15	0
1973	31.9 °C16 July 1973	3.9 °C11 February 1973	22.5 °C	900 mm	31	0
1972	31.6 °C29 June 1972	6.1 °C20 February 1972	23.0 °C	893 mm	33	0
1971	31.9 °C30 April 1971	1.1 °C20 January 1971	22.7 °C	908 mm	27	0
1970	32.0 °C26 June 1970	0.4 °C10 January 1970	22.1 °C	825 mm	29	0
1969	32.8 °C12 July 1969	5.2 °C15 November 1969	21.9 °C	1,152 mm	33	0
1968	31.4 °C29 July 1968	2.6 °C16 December 1968	21.6 °C	904 mm	17	0
1967	30.8 °C14 July 1967	2.9 °C26 February 1967	22.4 °C	713 mm	13	0
1966	31.7 °C5 July 1966	0.2 °C31 January 1966	21.7 °C	1,063 mm	15	0
1965	30.2 °C18 August 1965	2.4 °C17 January 1965	22.2 °C	829 mm	2	0
1964	32.2 °C13 July 1964	-0.1 °C14 January 1964	22.3 °C	1,097 mm	26	1
1963	32.4 °C5 July 1963	4.7 °C25 December 1963	22.0 °C	1,101 mm	43	0
1962	31.4 °C25 July 1962	-0.1 °C13 December 1962	22.0 °C	842 mm	22	1
1961	31.2 °C1 August 1961	3.0 °C22 January 1961	22.4 °C	671 mm	11	0
1960	30.9 °C23 August 1960	3.9 °C23 January 1960	21.8 °C	1,042 mm	15	0
1959	30.5 °C1 August 1959	2.2 °C17 January 1959	22.4 °C	1,344 mm	5	0
1958	32.7 °C15 June 1958	0.5 °C18 February 1958	21.7 °C	938 mm	26	0
1957	31.6 °C29 June 1957	0.4 °C12 December 1957	22.6 °C	1,122 mm	21	0
1956	32.5 °C7 August 1956	3.6 °C9 January 1956	22.1 °C	600 mm	22	0
1955	32.3 °C11 August 1955	3.0 °C12 February 1955	22.3 °C	789 mm	15	0
1954	31.5 °C28 June 1954	4.6 °C20 December 1954	22.0 °C	972 mm	24	0
1953	31.1 °C18 June 1953	5.7 °C4 January 1953	22.5 °C	1,297 mm	15	0
1952	31.5 °C23 August 1952	5.3 °C16 December 1952	22.3 °C	875 mm	27	0
1951	31.8 °C8 August 1951	4.6 °C3 February 1951	22.4 °C	893 mm	35	0
1950	33.3 °C26 June 1950	2.9 °C26 November 1950	22.4 °C	792 mm	26	0
1949	31.2 °C7 July 1949	4.7 °C1 January 1949	23.0 °C	898 mm	24	0
1948	32.1 °C9 June 1948	0.8 °C15 January 1948	23.2 °C	1,062 mm	29	0
1947	30.6 °C27 August 1947	3.3 °C5 February 1947	22.6 °C	1,396 mm	2	0
1946	30.7 °C8 August 1946	9.3 °C18 January 1946	23.2 °C	1,065 mm	8	0
1945	31.5 °C30 May 1945	9.2 °C2 February 1945	23.2 °C	979 mm	25	0
1944	34.3 °C25 June 1944	7.3 °C12 December 1944	23.2 °C	837 mm	33	0
1943	31.1 °C31 July 1943	7.6 °C15 February 1943	22.8 °C	1,052 mm	16	0
1942	33.0 °C21 July 1942	6.6 °C28 February 1942	22.9 °C	809 mm	34	0
1941	33.8 °C11 June 1941	7.3 °C1 March 1941	22.7 °C	773 mm	44	0
1940	31.7 °C25 July 1940	2.1 °C27 January 1940	22.1 °C	821 mm	26	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

25.7 °C

+0.5 °C

Hot days (≥ 30 °C)

57 d/yr

+25

Frost days (< 0 °C)

0 d/yr

Annual rainfall

1115 mm

+147 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	17.7 °C	-2.6 °C	70 mm	+17 mm
Feb	22.7 °C	+1.7 °C	70 mm	+14 mm
Mar	23.4 °C	+0.8 °C	31 mm	-33 mm
Apr	25.6 °C	+1.0 °C	15 mm	-33 mm
May	28.6 °C	+1.7 °C	109 mm	+48 mm
Jun	29.2 °C	+0.5 °C	119 mm	+6 mm
Jul	30.3 °C	+0.8 °C	165 mm	+57 mm
Aug	30.5 °C	+1.1 °C	165 mm	+45 mm
Sep	28.4 °C	-0.1 °C	199 mm	+48 mm
Oct	26.0 °C	-0.3 °C	146 mm	+48 mm
Nov	23.2 °C	-0.4 °C	13 mm	-39 mm
Dec	22.3 °C	+0.9 °C	14 mm	-31 mm

The year's extremes

Hottest day

32.7 °C

29 Jul 2025

Coldest day

6.3 °C

31 Dec 2025

Wettest day

49.8 mm

12 May 2025

Windiest day

38.8 km/h

6 Mar 2025

Strongest gust

61.9 km/h

21 Jan 2025

Hottest feels-like

40.6 °C

29 Jul 2025

Coldest feels-like

0.4 °C

11 Nov 2025

Sunniest day

13.1 h

1 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 Merritt Island?

Merritt Island has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 22.6 °C and it receives 968 mm of precipitation per year.

What is the hottest day ever recorded in Merritt Island?

The hottest day measured in Merritt Island between 1940 and 2025 was 25 June 1944, reaching 34.3 °C.

What is the coldest day in Merritt Island?

The coldest day measured in Merritt Island between 1940 and 2025 was 24 December 1989, at -2.5 °C.

Does it snow in Merritt Island?

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

Has the climate of Merritt Island warmed?

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

What is the wettest day in Merritt Island?

The wettest day measured in Merritt Island between 1940 and 2025 was 3 November 1987, with 168 mm of rain in 24 hours.

What was the windiest day in Merritt Island?

The windiest day measured in Merritt Island between 1940 and 2025 was 5 September 2004, with winds reaching 96.0 km/h.

What is the warmest month in Merritt Island?

The warmest month in Merritt Island is July (27.0 °C on average); the coldest is January (17.2 °C).

How much does it rain in Merritt Island?

Merritt Island receives on average 968 mm of precipitation per year, spread over about 147 rainy days.

Is it sunny in Merritt Island?

Merritt Island gets on average 10.3 hours of sunshine per day, roughly 3,760 hours per year over 1940-2025.

What is the biggest single-day snowfall in Merritt Island?

The heaviest 24-hour snowfall measured in Merritt Island between 1940 and 2025 was 9 January 2010, with 0.1 cm.

Are there tropical nights in Merritt Island?

Yes: Merritt Island has on average 219 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Merritt Island?

In Merritt Island, between 1940 and 2025, the highest apparent temperature reached 42.7 °C on 8 August 2023, and the lowest was -10.7 °C on 24 December 1989.

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