United States · 1991–2020

Best time to visit
Brighton.

September leads for comfortable weather in Brighton: typically 25.5°C by day, 11.3°C at night, with 92 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high25.5°C

Typical low11.3°C

Rain in September92 mm

Comfort

September

September · August · May

77climate match

Beach

July

July · August · June

70climate match

Outdoors

October

October · September · May

74climate match

The weakest month is January, scoring 5 against September’s 77 — days reach only -0.7°C, 25° 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

5-0.7° / -10.6°

Feb

52.1° / -8.5°

Mar

139.4° / -2.5°

Apr

4317° / 3.5°

May

6622.7° / 10.2°

Jun

6527.8° / 15.9°

Jul

6229.8° / 17.7°

Aug

6828.8° / 16.3°

Sep

7725.5° / 11.3°

Oct

5318.2° / 4.9°

Nov

169.6° / -1.7°

Dec

52.2° / -7.3°

Monthly climate evidence for Brighton — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	-0.7°C	-10.6°C	34 mm	5.8	9 h 31	5	Strong coverage
February	2.1°C	-8.5°C	41 mm	5.8	10 h 33	5	Strong coverage
March	9.4°C	-2.5°C	59 mm	7.2	11 h 48	13	Strong coverage
April	17°C	3.5°C	93 mm	8.9	13 h 15	43	Strong coverage
May	22.7°C	10.2°C	139 mm	10.7	14 h 28	66	Strong coverage
June	27.8°C	15.9°C	134 mm	10.4	15 h 07	65	Strong coverage
July	29.8°C	17.7°C	107 mm	8	14 h 52	62	Strong coverage
August	28.8°C	16.3°C	106 mm	7.8	13 h 49	68	Strong coverage
September	25.5°C	11.3°C	92 mm	6.7	12 h 25	77	Strong coverage
October	18.2°C	4.9°C	77 mm	7	11 h 02	53	Strong coverage
November	9.6°C	-1.7°C	57 mm	6.2	9 h 49	16	Strong coverage
December	2.2°C	-7.3°C	43 mm	6.1	9 h 13	5	Strong coverage

What has changed

Brighton runs -0.2°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

+0.2

Feb

-0.4

Mar

+0.5

Apr

-1.3

May

-1.3

Jun

-0.5

Jul

-1.1

Aug

-0.7

Sep

+0.9

Oct

-0.5

Nov

0.0

Dec

+1.9

September daytime highs, 2011–2025. Last recorded: 27.9°C.

Records at WASHINGTON, 1893–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	21.1°C31 Jan 1989	-35.6°C16 Jan 2009	55 mm4 Jan 1897	102 mm1916 · driest 0 mm in 1981	134
February	26.7°C28 Feb 2024	-33.9°C13 Feb 1905	51 mm9 Feb 2001	104 mm1997 · driest 1 mm in 1987	134
March	31.7°C22 Mar 2026	-26.7°C1 Mar 1962	112 mm26 Mar 1916	147 mm1916 · driest 6 mm in 1956	133
April	34.4°C10 Apr 1930	-13.9°C1 Apr 1899	96 mm18 Apr 2013	202 mm1965 · driest 13 mm in 1915	134
May	39.4°C31 May 1934	-5.0°C3 May 2005	100 mm4 May 2012	292 mm1996 · driest 24 mm in 1897	134
June	41.7°C29 Jun 1936	1.7°C12 Jun 1903	161 mm14 Jun 1930	343 mm1930 · driest 9 mm in 1961	134
July	45.0°C15 Jul 1936	7.2°C22 Jul 1947	147 mm24 Jul 1924	322 mm1993 · driest 0 mm in 1947	133
August	42.8°C3 Aug 1930	3.9°C31 Aug 1915	187 mm3 Aug 1943	314 mm1902 · driest 0 mm in 1947	132
September	38.9°C9 Sep 1933	-5.0°C28 Sep 1942	103 mm10 Sep 1992	325 mm1926 · driest 0 mm in 1940	133
October	35.6°C4 Oct 1938	-14.4°C30 Oct 1925	109 mm2 Oct 1927	210 mm1927 · driest 0 mm in 1952	133
November	27.8°C2 Nov 2016	-21.7°C26 Nov 1898	76 mm3 Nov 1944	162 mm1983 · driest 1 mm in 1989	132
December	23.3°C16 Dec 2021	-31.7°C28 Dec 1924	81 mm15 Dec 1971	142 mm1971 · driest 7 mm in 1976	131

Typical days per month at WASHINGTON, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	30	<1	5
February	0	0	26	1	4
March	<1	0	22	2	2
April	4	<1	8	3	<1
May	12	2	<1	4	0
June	24	10	0	4	0
July	29	16	0	3	0
August	28	12	0	3	0
September	17	6	<1	3	0
October	5	<1	6	2	<1
November	<1	0	19	2	<1
December	0	0	27	1	3

The best month has moved. On the 1961–1990 numbers the strongest month here was May (scoring 84); on 2011–2025 it is September (80). Both are scored the same way, from the same station — only the climate underneath changed.

How often, not how much — every day in WASHINGTON’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%	16%	3%	10%	-4.2–3.3°C
February	<1%	17%	4%	11%	-2.3–6.2°C
March	8%	22%	7%	21%	5.3–13.1°C
April	28%	27%	9%	31%	14.5–20.0°C
May	55%	30%	12%	34%	20.5–26.0°C
June	70%	29%	12%	31%	25.6–30.4°C
July	76%	24%	10%	25%	28.3–33.1°C
August	78%	22%	9%	21%	27.3–31.5°C
September	69%	23%	10%	22%	23.3–27.7°C
October	40%	20%	7%	19%	16.2–22.0°C
November	7%	18%	6%	14%	6.4–12.7°C
December	<1%	18%	4%	13%	-2.0–5.8°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.

1893Each stripe is one year’s mean temperature against the 127-year average. Warmest: 1987. Coolest: 2014.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4849349
NOAA station: USC00138688 · WASHINGTON
Station distance: 15.2 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 29 usable years
Daylight: Calculated from latitude 41.17°, 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 WASHINGTON is what differs

Washington→Wellman→Keota→Wayland→Ainsworth→Crawfordsville→

Or put two places side by side: Brighton vs Washington

Best time to visitBrighton.