United States · 1991–2020

Best time to visit
St. Marys.

April leads for comfortable weather in St. Marys: typically 24.7°C by day, 14.9°C at night, with 77 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortApril

Typical high24.7°C

Typical low14.9°C

Rain in April77 mm

Comfort

April

April · November · March

89climate match

Beach

May

May · October · April

83climate match

Outdoors

November

November · December · February

85climate match

The weakest month is August, scoring 34 against April’s 89 — days average 31.5°C, 8° above the 24°C the score treats as ideal, and 166 mm of rain falls.

Month by month

The whole year,
without the guesswork.

The bars show the comfort score. Day and night temperatures come from daily observed highs and lows; rain is the historical monthly estimate.

Jan

5417.6° / 7.4°

Feb

6018.6° / 8.3°

Mar

7421.6° / 11.2°

Apr

8924.7° / 14.9°

May

7128.3° / 19°

Jun

4030.7° / 22.5°

Jul

3532.1° / 23.5°

Aug

3431.5° / 23.6°

Sep

3829.3° / 22.5°

Oct

7426° / 18.1°

Nov

8621.9° / 12.6°

Dec

6318.7° / 9.4°

Monthly climate evidence for St. Marys — daylight is calculated from latitude, everything else is measured, sea temperature from the nearest open water 20 km away
Month	Day	Night	Rain	Wet days	Sea	Daylight	Comfort	Coverage
January	17.6°C	7.4°C	91 mm	6.7	15.9°C	10 h 21	54	Strong coverage
February	18.6°C	8.3°C	86 mm	6.2	15.7°C	11 h 03	60	Strong coverage
March	21.6°C	11.2°C	90 mm	6.9	17.0°C	11 h 54	74	Good coverage
April	24.7°C	14.9°C	77 mm	5.4	20.1°C	12 h 53	89	Good coverage
May	28.3°C	19°C	76 mm	5.2	23.9°C	13 h 41	71	Good coverage
June	30.7°C	22.5°C	163 mm	10.4	26.8°C	14 h 07	40	Good coverage
July	32.1°C	23.5°C	153 mm	10.7	27.9°C	13 h 57	35	Good coverage
August	31.5°C	23.6°C	166 mm	11.4	28.1°C	13 h 16	34	Good coverage
September	29.3°C	22.5°C	205 mm	10.6	27.9°C	12 h 19	38	Good coverage
October	26°C	18.1°C	118 mm	5.8	25.1°C	11 h 22	74	Good coverage
November	21.9°C	12.6°C	49 mm	4.5	20.9°C	10 h 33	86	Strong coverage
December	18.7°C	9.4°C	83 mm	6.2	17.9°C	10 h 10	63	Strong coverage

Records at FERNANDINA BEACH, 1892–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	31.7°C7 Jan 1916	-15.6°C21 Jan 1985	74 mm3 Jan 1923	238 mm1991 · driest 0 mm in 1950	119
February	32.8°C24 Feb 1962	-8.3°C3 Feb 1917	117 mm2 Feb 1920	256 mm1998 · driest 4 mm in 1918	121
March	35.0°C23 Mar 1907	-5.6°C3 Mar 1980	164 mm27 Mar 1984	256 mm1924 · driest 1 mm in 1945	122
April	34.4°C24 Apr 1958	1.7°C13 Apr 1940	152 mm14 Apr 2023	275 mm1928 · driest 0 mm in 1926	121
May	38.3°C22 May 1938	4.4°C10 May 1982	178 mm23 May 2023	413 mm1903 · driest 3 mm in 1987	122
June	40.0°C26 Jun 1950	10.6°C2 Jun 1977	164 mm29 Jun 1962	352 mm1932 · driest 0 mm in 1913	122
July	39.4°C25 Jul 1940	16.1°C1 Jul 1926	184 mm18 Jul 1945	427 mm1908 · driest 30 mm in 1903	120
August	38.9°C25 Aug 1938	16.1°C30 Aug 1982	225 mm28 Aug 1968	511 mm1995 · driest 9 mm in 1930	120
September	38.9°C5 Sep 1944	9.4°C25 Sep 1982	315 mm22 Sep 1897	605 mm1979 · driest 16 mm in 1961	120
October	35.6°C8 Oct 1941	3.9°C30 Oct 1968	175 mm19 Oct 1944	435 mm1947 · driest 3 mm in 1931	120
November	33.9°C1 Nov 1961	-4.4°C25 Nov 1950	156 mm29 Nov 1914	182 mm1914 · driest 0 mm in 1924	120
December	29.4°C3 Dec 1970	-11.1°C25 Dec 1983	101 mm14 Dec 1997	313 mm1997 · driest 1 mm in 1987	119

Typical days per month at FERNANDINA BEACH, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)
January	2	0	3	3
February	3	0	1	2
March	8	<1	<1	3
April	15	2	0	2
May	26	9	0	3
June	29	19	0	5
July	30	27	0	5
August	30	23	0	5
September	28	13	0	6
October	20	3	0	3
November	8	<1	0	2
December	4	0	1	2

How often, not how much — every day in FERNANDINA BEACH’s record sorted by what it was actually like, rather than averaged
Month	Warm & dry days	Wet days	Washouts	Week with 3+ wet days	Daytime mean has ranged
January	31%	21%	9%	20%	14.6–21.2°C
February	36%	23%	9%	23%	16.3–21.9°C
March	56%	22%	10%	21%	19.2–24.5°C
April	78%	17%	7%	14%	23.7–27.0°C
May	79%	21%	9%	20%	26.9–30.2°C
June	67%	33%	15%	42%	29.3–32.7°C
July	66%	34%	16%	43%	30.9–33.9°C
August	68%	32%	14%	39%	30.5–33.2°C
September	66%	34%	17%	44%	28.5–31.6°C
October	76%	22%	9%	20%	24.5–27.9°C
November	61%	16%	6%	12%	20.0–24.2°C
December	35%	20%	7%	18%	16.0–21.8°C

A warm and dry day reaches 20°C with under 1 mm of rain; a wet day gets 1 mm or more; a washout gets 10 mm or more. The week column is the share of seven-day stretches in that month, across the station’s whole daily record, that contained three or more wet days — the odds a week-long trip is rained on repeatedly, counted rather than modelled. The last column is the 10th to 90th percentile of that month’s daytime average across individual years: a narrow band means the average is what you will get, a wide one means the average is a midpoint between years that felt quite different.

1892Each stripe is one year’s mean temperature against the 102-year average. Warmest: 1949. Coolest: 1895.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4220629
NOAA station: USC00082944 · FERNANDINA BEACH
Station distance: 11.4 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 23 usable years
Daylight: Calculated from latitude 30.73°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Sea temperature: NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 20 km from the place centre. A sheltered bay can run warmer than the open sea it is measured from.
Important limit: Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.

These places read the same station, so their numbers are identical — distance from FERNANDINA BEACH is what differs

Fernandina Beach→Yulee→Hedges→Amelia City→American Beach→Becker→

Or put two places side by side: St. Marys vs Fernandina Beach

Best time to visitSt. Marys.

April

May

November

The whole year,without the guesswork.

Nearby, measured,and named.

Best time to visit
St. Marys.

The whole year,
without the guesswork.

Nearby, measured,
and named.