United Kingdom · 1991–2020

Best time to visit
Allhallows.

July leads for comfortable weather in Allhallows: typically 24°C by day, 14.2°C at night, with 46 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortJuly

Typical high24°C

Typical low14.2°C

Rain in July46 mm

Comfort

July

July · August · June

92climate match

Beach

July

July · August · June

59climate match

Outdoors

September

September · May · June

88climate match

The weakest month is January, scoring 15 against July’s 92 — days reach only 8.5°C, 15° below the 24°C the score treats as ideal.

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

158.5° / 2.5°

Feb

219.1° / 2.6°

Mar

3511.9° / 4.1°

Apr

4815.1° / 6°

May

6518.5° / 9.1°

Jun

8121.6° / 12°

Jul

9224° / 14.2°

Aug

8923.3° / 14°

Sep

7520.2° / 11.6°

Oct

5015.8° / 8.7°

Nov

2911.5° / 5.1°

Dec

188.9° / 2.8°

Monthly climate evidence for Allhallows — daylight is calculated from latitude, everything else is measured, sea temperature from the nearest open water 35 km away
Month	Day	Night	Rain	Wet days	Sea	Daylight	Comfort	Coverage
January	8.5°C	2.5°C	59 mm	11.5	7.6°C	8 h 19	15	Strong coverage
February	9.1°C	2.6°C	45 mm	9.5	6.5°C	9 h 53	21	Strong coverage
March	11.9°C	4.1°C	39 mm	8.5	7.1°C	11 h 41	35	Strong coverage
April	15.1°C	6°C	42 mm	8.8	9.0°C	13 h 46	48	Strong coverage
May	18.5°C	9.1°C	46 mm	8	11.7°C	15 h 34	65	Strong coverage
June	21.6°C	12°C	46 mm	8.2	14.6°C	16 h 36	81	Strong coverage
July	24°C	14.2°C	46 mm	7.9	17.0°C	16 h 11	92	Strong coverage
August	23.3°C	14°C	54 mm	8.4	18.2°C	14 h 36	89	Strong coverage
September	20.2°C	11.6°C	50 mm	7.9	17.1°C	12 h 34	75	Strong coverage
October	15.8°C	8.7°C	65 mm	10.8	14.8°C	10 h 34	50	Strong coverage
November	11.5°C	5.1°C	67 mm	11.2	12.0°C	8 h 47	29	Strong coverage
December	8.9°C	2.8°C	57 mm	10.8	9.3°C	7 h 52	18	Strong coverage

What has changed

Allhallows runs +1.8°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

+1.3

Feb

+2.1

Mar

+1.9

Apr

+2.5

May

+2.0

Jun

+2.0

Jul

+2.1

Aug

+1.7

Sep

+1.6

Oct

+1.2

Nov

+1.5

Dec

+1.9

July daytime highs, 2011–2025. Last recorded: 25.4°C.

Records at HEATHROW, 1960–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	15.4°C5 Jan 1999	-13.2°C24 Jan 1963	24 mm2 Jan 1986	162 mm2014 · driest 10 mm in 1997	67
February	20.1°C25 Feb 2019	-9.6°C10 Feb 1986	31 mm9 Feb 2009	100 mm2024 · driest 2 mm in 1993	67
March	23.8°C29 Mar 2021	-7.4°C3 Mar 1965	30 mm14 Mar 1964	95 mm2001 · driest 4 mm in 2025	67
April	28.5°C18 Apr 2018	-3.1°C3 Apr 1984	29 mm29 Apr 1991	102 mm1983 · driest 2 mm in 2011	67
May	35.0°C25 May 2026	-0.9°C3 May 1967	62 mm29 May 1992	102 mm1967 · driest 2 mm in 2020	67
June	36.7°C30 Jun 2015	1.5°C1 Jun 1962	53 mm11 Jun 1970	128 mm1971 · driest 0 mm in 2018	67
July	40.2°C18 Jul 2022	5.8°C4 Jul 1965	54 mm22 Jul 1967	115 mm2007 · driest 7 mm in 1990	66
August	37.9°C9 Aug 2003	5.7°C28 Aug 1979	57 mm2 Aug 1969	150 mm1977 · driest 0 mm in 1995	66
September	33.0°C8 Sep 2023	2.4°C30 Sep 1969	46 mm22 Sep 1992	140 mm1974 · driest 3 mm in 1969	66
October	28.3°C1 Oct 2011	-2.5°C30 Oct 1997	59 mm12 Oct 1993	175 mm1987 · driest 2 mm in 1978	66
November	18.5°C3 Nov 2010	-7.0°C23 Nov 1983	34 mm2 Nov 2022	151 mm1970 · driest 8 mm in 1978	66
December	16.6°C1 Dec 1985	-11.8°C13 Dec 1981	36 mm27 Dec 1979	119 mm1989 · driest 9 mm in 1988	66

Typical days per month at HEATHROW, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)
January	0	0	7	1
February	0	0	7	<1
March	0	0	3	<1
April	<1	0	<1	<1
May	3	0	0	1
June	5	<1	0	1
July	11	2	0	1
August	8	2	0	2
September	2	<1	0	2
October	<1	0	<1	2
November	0	0	3	2
December	0	0	7	1

How often, not how much — every day in HEATHROW’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	0%	36%	4%	49%	6.2–10.1°C
February	<1%	32%	2%	41%	5.9–11.0°C
March	<1%	30%	3%	39%	8.6–13.7°C
April	8%	29%	3%	37%	12.5–16.1°C
May	26%	28%	4%	32%	15.8–20.4°C
June	51%	26%	4%	31%	18.9–23.8°C
July	65%	25%	4%	28%	20.6–26.2°C
August	62%	26%	5%	31%	20.4–25.3°C
September	37%	27%	5%	34%	17.9–21.5°C
October	6%	33%	5%	44%	14.0–17.7°C
November	0%	35%	6%	45%	9.3–12.5°C
December	0%	34%	4%	46%	5.8–10.6°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.

1960Each stripe is one year’s mean temperature against the 66-year average. Warmest: 2022. Coolest: 1963.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 2657476
NOAA station: UKE00107650 · HEATHROW
Station distance: 13.1 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 30 usable years
Daylight: Calculated from latitude 51.47°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Sea temperature: NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 35 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 HEATHROW is what differs

Southend-on-Sea→Basildon→Grays→Gravesend→South Benfleet→Canvey Island→

Or put two places side by side: Allhallows vs Southend-on-Sea

Best time to visitAllhallows.

July

July

September

The whole year,without the guesswork.

Allhallows runs +1.8°Con the 1961–1990 baseline.

Nearby, measured,and named.

Best time to visit
Allhallows.

The whole year,
without the guesswork.

Allhallows runs +1.8°C
on the 1961–1990 baseline.

Nearby, measured,
and named.