St. Johns climate — normals and trends

Q: What is the climate of St. Johns?

St. Johns has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 20.8 °C and it receives 1,047 mm of precipitation per year.

Q: What is the hottest day ever recorded in St. Johns?

The hottest day measured in St. Johns between 1940 and 2025 was 24 June 1944, reaching 38.7 °C.

Q: What is the coldest day in St. Johns?

The coldest day measured in St. Johns between 1940 and 2025 was 21 January 1985, at -9.3 °C.

Q: Does it snow in St. Johns?

Almost never: St. Johns sees virtually no snow, with about 2 frost days per year.

Q: Has the climate of St. Johns warmed?

Yes: St. Johns warmed by +0.9 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in St. Johns?

The wettest day measured in St. Johns between 1940 and 2025 was 9 September 1964, with 161 mm of rain in 24 hours.

Q: What was the windiest day in St. Johns?

The windiest day measured in St. Johns between 1940 and 2025 was 9 September 1964, with winds reaching 72.0 km/h.

Q: What is the warmest month in St. Johns?

The warmest month in St. Johns is July (27.0 °C on average); the coldest is January (13.4 °C).

Q: How much does it rain in St. Johns?

St. Johns receives on average 1,047 mm of precipitation per year, spread over about 140 rainy days.

Q: Is it sunny in St. Johns?

St. Johns gets on average 10.0 hours of sunshine per day, roughly 3,650 hours per year over 1940-2025.

St. Johns (United States) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 20.8 °C and it receives 1,047 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 (13.4 °C). Rainfall peaks in September.

St. Johns averages 2 frost days, 75 hot days (≥ 30 °C) and 140 rainy days per year.

St. Johns has warmed by +0.9 °C between 1940 and 2025, or +0.11 °C per decade. This trend is statistically significant.

The hottest day of the period reached 38.7 °C (on 24 June 1944) and the coldest -9.3 °C (on 21 January 1985).

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

St. JohnsFlorida

coords: 30.08°, -81.55°
period: 1940–2025 · 86 yrs

CfaHumid subtropicalWarmest monthJulyColdest monthJanuaryWettest monthSeptemberDriest monthNovember

Mean daily temperature

20.8°C

Average daily high

24.9°C

Average daily low

17.4°C

Annual rainfall

1,047mm

Sunshine / day

10.0h

Mean relative humidity

77%

Average peak wind

16.9km/h

Seasonal range

13.6°C

Frost days (< 0 °C)

2 d/yr

Hot days (≥ 30 °C)

75 d/yr

Rainy days (≥ 1 mm)

140 d/yr

Annual snowfall

0.0 cm

Average feels-like high

26.7 °C

Average feels-like low

17.9 °C

Average peak gust

34.2 km/h

Tropical nights (≥ 20 °C)

160 d/yr

Solar radiation

17.2 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+0.9 °C

since 1940

+0.1 °C per decade · r² = 0.19 · 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

38.7 °C

24 June 1944

Coldest day

-9.3 °C

21 January 1985

Wettest day

161 mm

9 September 1964

Windiest day

72.0 km/h

9 September 1964

Strongest gust

152.3 km/h

9 September 1964

Hottest feels-like

45.0 °C

2 August 1999

Coldest feels-like

-16.6 °C

21 January 1985

Snowiest day

1.9 cm

23 December 1989

Sunniest day

13.2 h

1 June 1945

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days	Frost days
2025	35.5 °C30 July 2025	1.3 °C9 January 2025	21.3 °C	1,171 mm	97	0
2024	35.1 °C10 June 2024	1.4 °C17 January 2024	21.7 °C	1,252 mm	96	0
2023	36.6 °C21 July 2023	2.4 °C15 January 2023	22.1 °C	1,041 mm	89	0
2022	36.6 °C23 June 2022	-2.6 °C24 December 2022	21.6 °C	1,196 mm	95	2
2021	34.3 °C21 August 2021	2.4 °C17 January 2021	21.4 °C	1,204 mm	72	0
2020	35.1 °C28 June 2020	1.0 °C26 December 2020	22.2 °C	1,084 mm	94	0
2019	35.2 °C11 August 2019	2.8 °C21 January 2019	22.1 °C	988 mm	99	0
2018	33.9 °C14 September 2018	-2.6 °C18 January 2018	21.4 °C	1,234 mm	94	3
2017	33.6 °C28 May 2017	0.4 °C8 January 2017	22.0 °C	1,260 mm	83	0
2016	36.2 °C8 July 2016	0.5 °C24 January 2016	21.9 °C	1,085 mm	106	0
2015	34.9 °C19 June 2015	-0.6 °C20 February 2015	22.0 °C	969 mm	87	1
2014	34.3 °C3 July 2014	-2.5 °C7 January 2014	20.6 °C	1,216 mm	71	1
2013	33.9 °C13 June 2013	1.2 °C17 February 2013	21.1 °C	1,102 mm	62	0
2012	33.8 °C30 June 2012	-1.3 °C12 February 2012	21.3 °C	1,019 mm	72	1
2011	35.5 °C20 June 2011	-1.7 °C13 January 2011	21.3 °C	842 mm	105	1
2010	36.1 °C30 July 2010	-2.9 °C14 December 2010	20.0 °C	814 mm	102	12
2009	35.9 °C21 June 2009	-2.5 °C5 February 2009	20.9 °C	1,044 mm	78	3
2008	34.1 °C6 August 2008	-0.4 °C3 January 2008	20.7 °C	958 mm	76	1
2007	35.5 °C10 August 2007	0.9 °C17 February 2007	21.2 °C	894 mm	80	0
2006	36.6 °C11 August 2006	0.9 °C13 February 2006	21.1 °C	589 mm	100	0
2005	34.0 °C22 July 2005	-1.0 °C24 January 2005	20.6 °C	1,127 mm	78	1
2004	35.3 °C31 May 2004	0.3 °C20 December 2004	20.9 °C	1,073 mm	87	0
2003	32.9 °C9 July 2003	-4.2 °C24 January 2003	20.6 °C	972 mm	61	4
2002	35.3 °C3 June 2002	-0.6 °C28 February 2002	21.0 °C	1,021 mm	71	2
2001	34.4 °C9 July 2001	-1.4 °C4 January 2001	20.8 °C	1,023 mm	84	3
2000	35.4 °C7 July 2000	-3.3 °C20 December 2000	20.6 °C	758 mm	86	2
1999	37.7 °C2 August 1999	-1.1 °C6 January 1999	20.9 °C	917 mm	76	2
1998	37.0 °C30 June 1998	3.1 °C1 January 1998	21.8 °C	934 mm	93	0
1997	35.3 °C4 July 1997	-0.4 °C18 January 1997	21.0 °C	1,178 mm	86	1
1996	34.7 °C21 July 1996	-3.7 °C5 February 1996	20.4 °C	1,036 mm	67	6
1995	34.7 °C15 May 1995	-2.4 °C9 February 1995	20.8 °C	1,132 mm	74	2
1994	33.7 °C16 May 1994	0.3 °C19 January 1994	21.2 °C	1,266 mm	63	0
1993	34.8 °C29 July 1993	-0.6 °C14 March 1993	20.7 °C	1,238 mm	91	1
1992	35.0 °C10 July 1992	0.7 °C17 January 1992	20.7 °C	1,035 mm	76	0
1991	33.6 °C23 June 1991	-1.8 °C16 February 1991	21.5 °C	1,041 mm	84	1
1990	34.9 °C20 June 1990	3.2 °C13 January 1990	21.8 °C	754 mm	91	0
1989	35.0 °C6 August 1989	-5.4 °C24 December 1989	20.8 °C	1,101 mm	80	5
1988	34.3 °C24 May 1988	0.8 °C19 December 1988	20.2 °C	1,110 mm	76	0
1987	35.0 °C8 August 1987	1.2 °C27 January 1987	20.6 °C	1,070 mm	90	0
1986	36.9 °C20 July 1986	-5.8 °C28 January 1986	21.4 °C	968 mm	98	2
1985	35.8 °C3 June 1985	-9.3 °C21 January 1985	20.9 °C	998 mm	67	6
1984	34.1 °C11 August 1984	0.3 °C7 December 1984	20.4 °C	975 mm	56	0
1983	34.7 °C17 July 1983	-7.4 °C25 December 1983	20.1 °C	1,382 mm	63	4
1982	34.0 °C4 July 1982	-4.0 °C11 January 1982	21.2 °C	1,260 mm	68	3
1981	37.5 °C15 July 1981	-3.9 °C13 January 1981	20.0 °C	734 mm	87	6
1980	36.6 °C13 July 1980	-2.6 °C3 March 1980	20.3 °C	901 mm	81	2
1979	34.3 °C5 July 1979	-3.1 °C3 January 1979	20.4 °C	1,136 mm	67	2
1978	35.0 °C2 July 1978	-1.4 °C10 January 1978	20.3 °C	996 mm	66	6
1977	34.7 °C13 June 1977	-3.6 °C19 January 1977	20.1 °C	1,011 mm	81	6
1976	34.9 °C16 July 1976	-2.0 °C18 January 1976	19.8 °C	970 mm	47	2
1975	33.6 °C6 June 1975	-0.7 °C19 December 1975	21.0 °C	933 mm	76	1
1974	33.1 °C30 May 1974	-1.7 °C26 February 1974	21.0 °C	932 mm	53	1
1973	33.0 °C5 July 1973	-1.4 °C22 December 1973	20.6 °C	1,143 mm	66	2
1972	34.1 °C29 July 1972	0.6 °C16 January 1972	20.9 °C	1,055 mm	57	0
1971	35.2 °C15 June 1971	-3.6 °C20 January 1971	20.6 °C	1,048 mm	73	5
1970	34.9 °C20 June 1970	-4.7 °C8 January 1970	20.2 °C	869 mm	80	7
1969	34.2 °C13 July 1969	0.1 °C15 November 1969	19.7 °C	1,347 mm	56	0
1968	34.4 °C28 July 1968	-1.4 °C16 December 1968	19.6 °C	910 mm	70	2
1967	33.0 °C14 May 1967	-2.9 °C26 February 1967	20.2 °C	857 mm	54	2
1966	33.5 °C5 July 1966	-5.2 °C31 January 1966	19.7 °C	1,080 mm	48	6
1965	32.4 °C18 August 1965	-1.9 °C18 January 1965	20.2 °C	906 mm	48	3
1964	35.4 °C16 June 1964	-3.6 °C14 January 1964	20.3 °C	1,485 mm	57	2
1963	34.9 °C15 June 1963	-2.3 °C24 January 1963	19.9 °C	1,078 mm	73	4
1962	34.5 °C9 July 1962	-6.7 °C13 December 1962	20.1 °C	990 mm	76	5
1961	33.5 °C31 July 1961	-2.3 °C22 January 1961	20.2 °C	867 mm	62	2
1960	33.9 °C3 July 1960	-2.0 °C23 January 1960	19.7 °C	1,187 mm	58	4
1959	34.1 °C30 June 1959	-3.7 °C17 January 1959	20.5 °C	1,419 mm	46	4
1958	34.0 °C14 June 1958	-5.0 °C18 February 1958	19.6 °C	1,009 mm	80	7
1957	33.6 °C16 August 1957	-3.9 °C12 December 1957	20.7 °C	1,172 mm	62	3
1956	35.2 °C7 August 1956	-0.7 °C9 January 1956	20.1 °C	805 mm	65	2
1955	33.9 °C11 August 1955	-2.4 °C12 February 1955	20.4 °C	885 mm	75	2
1954	36.3 °C28 June 1954	-0.2 °C21 December 1954	20.4 °C	744 mm	77	1
1953	35.2 °C26 May 1953	0.4 °C18 December 1953	20.7 °C	1,320 mm	68	0
1952	35.9 °C26 June 1952	0.1 °C16 December 1952	20.5 °C	1,089 mm	76	0
1951	34.5 °C8 August 1951	-1.0 °C8 February 1951	20.6 °C	884 mm	89	3
1950	37.0 °C26 June 1950	-3.8 °C25 November 1950	20.7 °C	1,149 mm	62	2
1949	33.8 °C28 July 1949	1.3 °C1 January 1949	21.4 °C	1,031 mm	80	0
1948	34.4 °C25 June 1948	-4.4 °C15 January 1948	21.4 °C	1,129 mm	72	1
1947	33.5 °C27 August 1947	-1.4 °C5 February 1947	20.9 °C	1,472 mm	47	2
1946	33.2 °C16 July 1946	4.6 °C18 January 1946	21.4 °C	1,164 mm	38	0
1945	36.6 °C1 June 1945	2.8 °C20 December 1945	21.5 °C	1,182 mm	79	0
1944	38.7 °C24 June 1944	3.3 °C12 December 1944	21.4 °C	1,202 mm	68	0
1943	35.0 °C15 August 1943	1.6 °C15 February 1943	21.0 °C	960 mm	69	0
1942	35.9 °C21 July 1942	2.0 °C11 January 1942	21.2 °C	861 mm	67	0
1941	37.4 °C11 June 1941	3.6 °C1 March 1941	21.1 °C	854 mm	82	0
1940	34.2 °C24 July 1940	-1.6 °C27 January 1940	20.5 °C	952 mm	55	2

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

+0.8 °C

Hot days (≥ 30 °C)

97 d/yr

+22

Frost days (< 0 °C)

0 d/yr

-2

Annual rainfall

1171 mm

+124 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	15.4 °C	-2.6 °C	86 mm	+24 mm
Feb	21.5 °C	+2.3 °C	40 mm	-28 mm
Mar	23.0 °C	+1.2 °C	56 mm	-19 mm
Apr	26.8 °C	+2.0 °C	16 mm	-38 mm
May	30.3 °C	+2.3 °C	120 mm	+55 mm
Jun	30.8 °C	+0.7 °C	129 mm	+11 mm
Jul	31.9 °C	+1.0 °C	128 mm	-6 mm
Aug	30.6 °C	+0.1 °C	289 mm	+145 mm
Sep	28.6 °C	-0.3 °C	117 mm	-27 mm
Oct	25.3 °C	-0.4 °C	139 mm	+58 mm
Nov	23.2 °C	+1.1 °C	2 mm	-46 mm
Dec	20.1 °C	+0.9 °C	50 mm	-6 mm

The year's extremes

Hottest day

35.5 °C

30 Jul 2025

Coldest day

1.3 °C

9 Jan 2025

Wettest day

46.9 mm

10 Oct 2025

Windiest day

34.5 km/h

6 Jan 2025

Strongest gust

79.2 km/h

6 Jan 2025

Hottest feels-like

42.5 °C

19 Jul 2025

Coldest feels-like

-4.8 °C

22 Jan 2025

Sunniest day

13.1 h

24 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 St. Johns?

St. Johns has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 20.8 °C and it receives 1,047 mm of precipitation per year.

What is the hottest day ever recorded in St. Johns?

The hottest day measured in St. Johns between 1940 and 2025 was 24 June 1944, reaching 38.7 °C.

What is the coldest day in St. Johns?

The coldest day measured in St. Johns between 1940 and 2025 was 21 January 1985, at -9.3 °C.

Does it snow in St. Johns?

Almost never: St. Johns sees virtually no snow, with about 2 frost days per year.

Has the climate of St. Johns warmed?

Yes: St. Johns warmed by +0.9 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in St. Johns?

The wettest day measured in St. Johns between 1940 and 2025 was 9 September 1964, with 161 mm of rain in 24 hours.

What was the windiest day in St. Johns?

The windiest day measured in St. Johns between 1940 and 2025 was 9 September 1964, with winds reaching 72.0 km/h.

What is the warmest month in St. Johns?

The warmest month in St. Johns is July (27.0 °C on average); the coldest is January (13.4 °C).

How much does it rain in St. Johns?

St. Johns receives on average 1,047 mm of precipitation per year, spread over about 140 rainy days.

Is it sunny in St. Johns?

St. Johns gets on average 10.0 hours of sunshine per day, roughly 3,650 hours per year over 1940-2025.

What is the biggest single-day snowfall in St. Johns?

The heaviest 24-hour snowfall measured in St. Johns between 1940 and 2025 was 23 December 1989, with 1.9 cm.

Are there tropical nights in St. Johns?

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

What was the most extreme apparent temperature in St. Johns?

In St. Johns, between 1940 and 2025, the highest apparent temperature reached 45.0 °C on 2 August 1999, and the lowest was -16.6 °C on 21 January 1985.

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