United States · 1991–2020

Best time to visit
Charlestown (historical).

September leads for comfortable weather in Charlestown (historical): typically 26°C by day, 11.8°C at night, with 54 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high26°C

Typical low11.8°C

Rain in September54 mm

Comfort

September

September · June · May

83climate match

Beach

August

August · July · June

75climate match

Outdoors

October

October · September · April

86climate match

The weakest month is January, scoring 5 against September’s 83 — days reach only 1.4°C, 23° below the 24°C the score treats as ideal, and nights drop to -9.9°C.

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

51.4° / -9.9°

Feb

54.5° / -7.5°

Mar

1910.2° / -2.6°

Apr

4716.9° / 3.4°

May

7023° / 10.3°

Jun

7128.6° / 16.1°

Jul

5731.2° / 18.8°

Aug

6629.9° / 17.5°

Sep

8326° / 11.8°

Oct

6419.3° / 5.1°

Nov

209.6° / -2.4°

Dec

53.7° / -7°

Monthly climate evidence for Charlestown (historical) — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	1.4°C	-9.9°C	21 mm	3.5	9 h 33	5	Good coverage
February	4.5°C	-7.5°C	20 mm	3.4	10 h 34	5	Good coverage
March	10.2°C	-2.6°C	46 mm	5.4	11 h 49	19	Good coverage
April	16.9°C	3.4°C	74 mm	7	13 h 14	47	Good coverage
May	23°C	10.3°C	124 mm	9.6	14 h 26	70	Good coverage
June	28.6°C	16.1°C	95 mm	7.2	15 h 05	71	Good coverage
July	31.2°C	18.8°C	90 mm	7.4	14 h 50	57	Good coverage
August	29.9°C	17.5°C	85 mm	7	13 h 48	66	Good coverage
September	26°C	11.8°C	54 mm	4.9	12 h 25	83	Good coverage
October	19.3°C	5.1°C	44 mm	4.7	11 h 03	64	Good coverage
November	9.6°C	-2.4°C	41 mm	4.1	9 h 51	20	Good coverage
December	3.7°C	-7°C	20 mm	3.2	9 h 15	5	Good coverage

Records at YORK, 1901–2008
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	23.9°C11 Jan 1990	-33.9°C12 Jan 1912	32 mm15 Jan 1960	64 mm1932 · driest 0 mm in 1903	107
February	27.2°C26 Feb 1995	-30.0°C8 Feb 1933	64 mm24 Feb 1997	91 mm1919 · driest 0 mm in 1917	106
March	32.8°C22 Mar 1910	-26.7°C4 Mar 1960	62 mm28 Mar 1914	240 mm1987 · driest 1 mm in 1929	106
April	36.1°C15 Apr 2006	-16.7°C3 Apr 1936	84 mm19 Apr 2005	170 mm1984 · driest 0 mm in 1926	108
May	40.6°C29 May 1934	-6.1°C2 May 1909	158 mm12 May 2005	344 mm1903 · driest 14 mm in 1934	108
June	42.8°C26 Jun 1936	1.7°C7 Jun 1935	156 mm30 Jun 1986	345 mm1967 · driest 9 mm in 1911	108
July	45.6°C25 Jul 1936	6.1°C30 Jul 1971	334 mm9 Jul 1950	407 mm1950 · driest 0 mm in 1936	107
August	43.9°C8 Aug 1934	3.9°C30 Aug 1915	123 mm29 Aug 1910	255 mm1977 · driest 6 mm in 1955	105
September	41.7°C6 Sep 1939	-3.3°C24 Sep 1942	121 mm28 Sep 1923	234 mm1923 · driest 3 mm in 1998	106
October	37.2°C11 Oct 1913	-17.2°C28 Oct 1997	100 mm12 Oct 1928	153 mm1928 · driest 0 mm in 1945	106
November	30.6°C9 Nov 2006	-21.7°C14 Nov 1940	82 mm20 Nov 1975	155 mm1983 · driest 0 mm in 1945	106
December	27.2°C6 Dec 1939	-32.2°C21 Dec 1916	45 mm5 Dec 1913	113 mm1913 · driest 0 mm in 1908	105

Typical days per month at YORK, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	30	<1	3
February	<1	0	26	<1	3
March	<1	0	21	2	2
April	5	1	7	2	<1
May	13	4	<1	4	0
June	23	13	0	3	0
July	29	20	0	3	0
August	27	16	0	3	0
September	18	9	<1	2	<1
October	7	2	5	1	<1
November	<1	<1	21	1	2
December	0	0	29	<1	2

How often, not how much — every day in YORK’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	<1%	11%	1%	5%	-2.8–6.5°C
February	2%	13%	3%	8%	0.0–9.3°C
March	13%	17%	4%	11%	5.4–14.5°C
April	34%	23%	8%	24%	14.8–20.6°C
May	56%	29%	11%	33%	20.9–26.4°C
June	70%	28%	11%	29%	26.1–31.6°C
July	76%	24%	9%	21%	29.2–35.1°C
August	76%	23%	9%	21%	28.0–33.7°C
September	71%	20%	8%	16%	23.9–29.2°C
October	49%	14%	5%	11%	16.7–23.1°C
November	10%	12%	3%	7%	7.6–14.2°C
December	<1%	11%	2%	5%	-0.5–7.2°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.

1902Each stripe is one year’s mean temperature against the 101-year average. Warmest: 1921. Coolest: 1993.2007

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5065537
NOAA station: USC00259510 · YORK
Station distance: 10.2 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 17 usable years
Daylight: Calculated from latitude 40.82°, 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 YORK is what differs

York→Utica→Waco→Knox→

Or put two places side by side: Charlestown (historical) vs York

Best time to visitCharlestown (historical).