United States · 1991–2020

Best time to visit
Heathrow.

November leads for comfortable weather in Heathrow: typically 25.5°C by day, 14.7°C at night, with 59 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortNovember

Typical high25.5°C

Typical low14.7°C

Rain in November59 mm

Comfort

November

November · February · March

89climate match

Beach

October

October · May · April

79climate match

Outdoors

January

January · February · December

85climate match

The weakest month is August, scoring 19 against November’s 89 — days average 33.5°C, 10° above the 24°C the score treats as ideal, and 206 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

7421.5° / 9.4°

Feb

8323° / 10.6°

Mar

8325.4° / 12.9°

Apr

7828.1° / 15.8°

May

5831° / 19.2°

Jun

2432.7° / 22.2°

Jul

2133.6° / 23.2°

Aug

1933.5° / 23.4°

Sep

3432.1° / 22.7°

Oct

6229.2° / 19.3°

Nov

8925.5° / 14.7°

Dec

8322.7° / 11.4°

Monthly climate evidence for Heathrow — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	21.5°C	9.4°C	71 mm	6	10 h 29	74	Strong coverage
February	23°C	10.6°C	63 mm	5.2	11 h 08	83	Strong coverage
March	25.4°C	12.9°C	80 mm	5.4	11 h 55	83	Strong coverage
April	28.1°C	15.8°C	68 mm	5.6	12 h 49	78	Strong coverage
May	31°C	19.2°C	90 mm	6.6	13 h 34	58	Strong coverage
June	32.7°C	22.2°C	206 mm	14.1	13 h 58	24	Strong coverage
July	33.6°C	23.2°C	204 mm	13	13 h 49	21	Strong coverage
August	33.5°C	23.4°C	206 mm	14.8	13 h 10	19	Strong coverage
September	32.1°C	22.7°C	160 mm	11.5	12 h 18	34	Strong coverage
October	29.2°C	19.3°C	100 mm	7.3	11 h 26	62	Strong coverage
November	25.5°C	14.7°C	59 mm	5.1	10 h 41	89	Strong coverage
December	22.7°C	11.4°C	63 mm	5.3	10 h 19	83	Strong coverage

What has changed

Heathrow runs +0.7°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

0.0

Feb

+1.9

Mar

+1.0

Apr

+0.6

May

+0.4

Jun

+0.3

Jul

+0.4

Aug

+0.6

Sep

+0.5

Oct

+0.6

Nov

+0.3

Dec

+1.3

November daytime highs, 2011–2025. Last recorded: 25.0°C.

Records at SANFORD, 1956–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	31.7°C20 Jan 1990	-7.2°C21 Jan 1985	102 mm2 Jan 1996	189 mm1964 · driest 2 mm in 2012	70
February	31.7°C24 Feb 1962	-4.4°C2 Feb 2026	107 mm5 Feb 1960	261 mm1998 · driest 8 mm in 1989	70
March	33.3°C31 Mar 1970	-2.8°C3 Mar 1980	105 mm20 Mar 2001	284 mm1996 · driest 0 mm in 2006	70
April	35.6°C27 Apr 1999	2.2°C5 Apr 1987	165 mm9 Apr 1982	231 mm1982 · driest 1 mm in 1981	70
May	37.8°C23 May 1998	7.2°C8 May 1992	138 mm19 May 2009	396 mm2009 · driest 5 mm in 2000	70
June	38.9°C19 Jun 1998	11.1°C1 Jun 1984	109 mm27 Jun 1974	491 mm2002 · driest 24 mm in 1987	71
July	39.4°C1 Jul 1998	15.6°C1 Jul 1981	156 mm26 Jul 1995	422 mm1991 · driest 29 mm in 1986	70
August	37.8°C20 Aug 1993	17.8°C25 Aug 1957	210 mm22 Aug 2008	630 mm2008 · driest 34 mm in 1982	70
September	36.7°C6 Sep 1999	11.1°C20 Sep 1981	292 mm11 Sep 2017	514 mm2022 · driest 37 mm in 1981	70
October	35.6°C10 Oct 2009	3.9°C21 Oct 1989	234 mm10 Oct 2024	290 mm1958 · driest 0 mm in 2010	70
November	33.3°C1 Nov 1986	-1.1°C25 Nov 1970	258 mm25 Nov 1992	305 mm1992 · driest 0 mm in 2016	70
December	31.1°C27 Dec 1968	-7.2°C24 Dec 1989	96 mm21 Dec 2018	231 mm1997 · driest 3 mm in 1984	70

Typical days per month at SANFORD, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)
January	9	<1	1	2
February	11	<1	<1	2
March	19	4	<1	3
April	25	10	0	2
May	29	21	0	3
June	30	26	0	6
July	30	29	0	6
August	31	30	0	6
September	29	26	0	5
October	28	14	0	3
November	19	3	0	1
December	12	<1	<1	2

The best month has moved. On the 1961–1990 numbers the strongest month here was November (scoring 91); on 2011–2025 it is February (92). Both are scored the same way, from the same station — only the climate underneath changed.

How often, not how much — every day in SANFORD’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	53%	18%	6%	15%	18.9–24.1°C
February	60%	20%	8%	17%	20.1–25.5°C
March	73%	19%	9%	14%	22.8–27.7°C
April	83%	16%	6%	12%	26.7–29.7°C
May	78%	22%	9%	22%	29.4–32.4°C
June	58%	42%	18%	61%	31.2–33.8°C
July	58%	42%	18%	59%	32.7–34.3°C
August	56%	44%	18%	62%	32.4–34.3°C
September	64%	36%	16%	47%	31.0–32.8°C
October	76%	23%	8%	23%	27.5–30.3°C
November	76%	16%	5%	12%	23.7–27.0°C
December	61%	17%	5%	13%	20.4–24.9°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.

1957Each stripe is one year’s mean temperature against the 67-year average. Warmest: 2023. Coolest: 1988.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4158296
NOAA station: USC00087982 · SANFORD
Station distance: 10.8 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 29 usable years
Daylight: Calculated from latitude 28.76°, 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 SANFORD is what differs

Deltona→Sanford→DeBary→Lake Mary→Lake Monroe→Alderene Park→

Or put two places side by side: Heathrow vs Deltona

Best time to visitHeathrow.

November

October

January

The whole year,without the guesswork.

Heathrow runs +0.7°Con the 1961–1990 baseline.

Nearby, measured,and named.

Best time to visit
Heathrow.

The whole year,
without the guesswork.

Heathrow runs +0.7°C
on the 1961–1990 baseline.

Nearby, measured,
and named.