United States · 1991–2020

Best time to visit
Saint Helena.

May leads for comfortable weather in Saint Helena: typically 25.8°C by day, 10°C at night, with 29 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortMay

Typical high25.8°C

Typical low10°C

Rain in May29 mm

Comfort

May

May · October · April

85climate match

Beach

June

June · July · August

73climate match

Outdoors

April

April · May · October

85climate match

The weakest month is December, scoring 21 against May’s 85 — days reach only 14.6°C, 9° below the 24°C the score treats as ideal, and 195 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

2515.1° / 4.3°

Feb

3217.1° / 5.2°

Mar

4919.5° / 6.4°

Apr

7822.3° / 7.7°

May

8525.8° / 10°

Jun

7629.8° / 12.1°

Jul

7131.7° / 13.1°

Aug

7131.6° / 13.1°

Sep

7330.5° / 11.8°

Oct

8325.8° / 9.4°

Nov

5818.9° / 6.3°

Dec

2114.6° / 4°

Monthly climate evidence for Saint Helena — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	15.1°C	4.3°C	178 mm	10.1	9 h 45	25	Strong coverage
February	17.1°C	5.2°C	185 mm	10.1	10 h 42	32	Strong coverage
March	19.5°C	6.4°C	146 mm	9	11 h 50	49	Strong coverage
April	22.3°C	7.7°C	49 mm	4.7	13 h 09	78	Strong coverage
May	25.8°C	10°C	29 mm	2.6	14 h 15	85	Strong coverage
June	29.8°C	12.1°C	4 mm	0.7	14 h 50	76	Strong coverage
July	31.7°C	13.1°C	0 mm	0	14 h 36	71	Strong coverage
August	31.6°C	13.1°C	1 mm	0.1	13 h 40	71	Strong coverage
September	30.5°C	11.8°C	2 mm	0.3	12 h 23	73	Strong coverage
October	25.8°C	9.4°C	41 mm	2.7	11 h 07	83	Strong coverage
November	18.9°C	6.3°C	83 mm	5.8	10 h 02	58	Strong coverage
December	14.6°C	4°C	195 mm	9.4	9 h 29	21	Strong coverage

What has changed

Saint Helena runs +1.2°C
on the 1961–1990 baseline.

Each bar compares the 2011–2025 daytime average for that month against the same month in 1961–1990, measured at the same station. Months where the older record is too thin to compare are left blank.

Jan

+2.4

Feb

+1.4

Mar

+1.2

Apr

+1.4

May

+0.7

Jun

+1.6

Jul

-0.1

Aug

+0.2

Sep

+1.8

Oct

+1.5

Nov

+1.3

Dec

+1.3

May daytime highs, 2011–2022. Last recorded: 27.8°C.

Records at SAINT HELENA, 1907–2023
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	28.3°C8 Jan 1962	-8.9°C2 Jan 1924	174 mm21 Jan 1967	702 mm1909 · driest 0 mm in 2020	109
February	30.0°C15 Feb 2016	-7.8°C3 Feb 2020	147 mm16 Feb 1986	650 mm1986 · driest 0 mm in 2020	112
March	35.0°C17 Mar 1914	-4.4°C12 Mar 1919	163 mm9 Mar 1995	427 mm1995 · driest 1 mm in 1923	113
April	36.7°C29 Apr 1981	-2.8°C8 Apr 1953	89 mm1 Apr 1927	214 mm1926 · driest 0 mm in 1909	115
May	41.7°C30 May 1919	-0.6°C27 May 1918	51 mm18 May 2005	132 mm1915 · driest 0 mm in 2001	110
June	43.3°C21 Jun 1921	2.2°C12 Jun 1952	41 mm2 Jun 1967	65 mm2011 · driest 0 mm in 1971	109
July	46.1°C14 Jul 1972	2.8°C16 Jul 1930	26 mm8 Jul 1974	28 mm1974 · driest 0 mm in 1955	109
August	44.4°C28 Aug 1915	3.3°C27 Aug 1942	19 mm20 Aug 1997	21 mm1965 · driest 0 mm in 1924	110
September	45.0°C6 Sep 2022	0.6°C19 Sep 1926	93 mm18 Sep 1959	93 mm1959 · driest 0 mm in 1945	111
October	40.0°C5 Oct 1933	-5.6°C2 Oct 2019	252 mm24 Oct 2021	299 mm1962 · driest 0 mm in 1959	111
November	33.9°C8 Nov 1914	-10.6°C27 Nov 2019	132 mm21 Nov 1977	387 mm1973 · driest 0 mm in 1933	112
December	28.3°C27 Dec 1967	-11.7°C11 Dec 1932	178 mm30 Dec 1913	618 mm1955 · driest 0 mm in 2020	112

Typical days per month at SAINT HELENA, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)
January	<1	0	4	5
February	2	0	2	5
March	5	<1	<1	4
April	9	3	<1	2
May	18	7	0	1
June	25	14	0	<1
July	30	20	0	0
August	29	20	0	0
September	26	15	0	0
October	17	6	<1	2
November	4	<1	1	3
December	0	0	5	5

The best month has moved. On the 1961–1990 numbers the strongest month here was May (scoring 81); on 2011–2025 it is April (86). Both are scored the same way, from the same station — only the climate underneath changed.

How often, not how much — every day in SAINT HELENA’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	7%	34%	18%	43%	12.1–16.2°C
February	20%	32%	17%	40%	14.0–18.8°C
March	38%	27%	13%	31%	16.2–21.6°C
April	64%	16%	6%	15%	19.5–24.7°C
May	84%	8%	2%	6%	22.6–27.9°C
June	96%	3%	<1%	<1%	27.2–31.5°C
July	100%	<1%	<1%	0%	30.3–33.9°C
August	99%	1%	<1%	<1%	29.8–33.2°C
September	96%	3%	<1%	2%	27.8–32.0°C
October	80%	11%	4%	10%	23.0–28.1°C
November	41%	22%	10%	28%	16.5–22.2°C
December	8%	30%	16%	37%	12.0–17.1°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.

1908Each stripe is one year’s mean temperature against the 93-year average. Warmest: 2014. Coolest: 1930.2018

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5390267
NOAA station: USC00047643 · SAINT HELENA
Station distance: 0.2 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 25 usable years
Daylight: Calculated from latitude 38.51°, mid-month, sunrise to sunset including refraction. Not a station measurement.
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 SAINT HELENA is what differs

Deer Park→Kenwood→Rutherford→Oakville→Bale→Barro→

Or put two places side by side: Saint Helena vs Deer Park

Best time to visitSaint Helena.

May

June

April

The whole year,without the guesswork.

Saint Helena runs +1.2°Con the 1961–1990 baseline.

Nearby, measured,and named.

Best time to visit
Saint Helena.

The whole year,
without the guesswork.

Saint Helena runs +1.2°C
on the 1961–1990 baseline.

Nearby, measured,
and named.