United States · 1991–2020

Best time to visit
New Cumberland.

September leads for comfortable weather in New Cumberland: typically 25.5°C by day, 14.3°C at night, with 97 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high25.5°C

Typical low14.3°C

Rain in September97 mm

Comfort

September

September · May · June

82climate match

Beach

August

August · July · June

75climate match

Outdoors

October

October · April · May

75climate match

The weakest month is January, scoring 5 against September’s 82 — days reach only 3.9°C, 20° 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

53.9° / -4.7°

Feb

55.6° / -3.8°

Mar

2010.9° / 0.4°

Apr

4917.8° / 5.9°

May

7723.3° / 11.7°

Jun

6928° / 16.6°

Jul

5530.5° / 19.3°

Aug

6229.3° / 18.6°

Sep

8225.5° / 14.3°

Oct

5618.8° / 8°

Nov

3212.5° / 2.4°

Dec

56.3° / -2°

Monthly climate evidence for New Cumberland — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	3.9°C	-4.7°C	60 mm	7.2	9 h 36	5	Good coverage
February	5.6°C	-3.8°C	59 mm	7.3	10 h 36	5	Good coverage
March	10.9°C	0.4°C	77 mm	8	11 h 49	20	Good coverage
April	17.8°C	5.9°C	91 mm	9.6	13 h 13	49	Good coverage
May	23.3°C	11.7°C	90 mm	10.3	14 h 23	77	Good coverage
June	28°C	16.6°C	100 mm	9	15 h 01	69	Good coverage
July	30.5°C	19.3°C	107 mm	9.5	14 h 46	55	Good coverage
August	29.3°C	18.6°C	100 mm	8.2	13 h 46	62	Good coverage
September	25.5°C	14.3°C	97 mm	6.5	12 h 24	82	Good coverage
October	18.8°C	8°C	103 mm	8	11 h 04	56	Good coverage
November	12.5°C	2.4°C	65 mm	6.4	9 h 53	32	Good coverage
December	6.3°C	-2°C	85 mm	8.2	9 h 19	5	Good coverage

What has changed

New Cumberland runs +1.7°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

+2.1

Feb

+2.8

Mar

+1.9

Apr

+1.8

May

+1.3

Jun

+1.2

Jul

+1.5

Aug

+0.8

Sep

+1.5

Oct

+1.7

Nov

+1.2

Dec

+2.7

September daytime highs, 2011–2025. Last recorded: 26.7°C.

Records at HARRISBURG CAPITAL CITY AP, 1939–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	22.8°C26 Jan 1950	-22.8°C22 Jan 1984	53 mm24 Jan 1979	204 mm1979 · driest 11 mm in 1981	79
February	28.3°C21 Feb 2018	-20.6°C18 Feb 1979	51 mm11 Feb 1983	151 mm1981 · driest 8 mm in 2015	79
March	30.0°C29 Mar 1945	-16.6°C6 Mar 2015	61 mm30 Mar 2014	155 mm1977 · driest 18 mm in 2006	79
April	33.9°C22 Apr 1985	-7.2°C7 Apr 1982	98 mm16 Apr 2011	268 mm2011 · driest 12 mm in 1985	79
May	36.1°C1 May 1942	-0.6°C11 May 1966	67 mm8 May 1960	247 mm1989 · driest 5 mm in 2023	79
June	37.8°C26 Jun 1952	4.4°C11 Jun 1980	232 mm22 Jun 1972	471 mm1972 · driest 2 mm in 1966	79
July	41.7°C3 Jul 1966	9.4°C12 Jul 1945	102 mm23 Jul 1969	277 mm2018 · driest 20 mm in 1955	79
August	38.3°C12 Aug 1944	7.2°C31 Aug 1976	93 mm12 Aug 2010	231 mm1955 · driest 24 mm in 1957	78
September	38.9°C2 Sep 1953	-1.1°C24 Sep 1963	134 mm1 Sep 2021	381 mm1975 · driest 17 mm in 1986	78
October	36.1°C5 Oct 1941	-5.0°C24 Oct 1969	162 mm11 Oct 2013	296 mm2013 · driest 1 mm in 1963	78
November	28.9°C1 Nov 1950	-10.6°C29 Nov 1955	74 mm8 Nov 1943	216 mm2018 · driest 14 mm in 1939	78
December	23.9°C1 Dec 2006	-22.2°C23 Dec 1960	69 mm13 Dec 1983	192 mm1983 · driest 6 mm in 1955	78

Typical days per month at HARRISBURG CAPITAL CITY AP, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	25	2	6
February	<1	0	23	2	3
March	<1	0	16	2	3
April	4	<1	3	3	0
May	13	4	0	3	0
June	24	11	0	4	0
July	30	18	0	3	0
August	28	14	0	3	0
September	17	5	0	3	0
October	4	<1	1	3	—
November	<1	0	10	3	—
December	0	0	22	3	—

The best month has moved. On the 1961–1990 numbers the strongest month here was September (scoring 88); on 2011–2025 it is May (85). Both are scored the same way, from the same station — only the climate underneath changed.

How often, not how much — every day in HARRISBURG CAPITAL CITY AP’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%	26%	7%	28%	-0.2–6.4°C
February	1%	27%	8%	31%	1.6–8.9°C
March	8%	28%	9%	33%	7.4–14.1°C
April	26%	31%	8%	40%	14.5–19.7°C
May	52%	33%	11%	43%	20.6–25.4°C
June	69%	30%	10%	34%	26.1–29.4°C
July	73%	27%	10%	29%	28.2–32.2°C
August	75%	25%	9%	23%	27.4–30.8°C
September	69%	23%	8%	23%	23.0–27.0°C
October	35%	22%	8%	23%	16.4–21.1°C
November	7%	24%	8%	24%	9.3–14.4°C
December	<1%	26%	9%	29%	2.2–8.6°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.

1939Each stripe is one year’s mean temperature against the 77-year average. Warmest: 2023. Coolest: 1940.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5203164
NOAA station: USW00014751 · HARRISBURG CAPITAL CITY AP
Station distance: 2.9 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 21 usable years
Daylight: Calculated from latitude 40.23°, 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 HARRISBURG CAPITAL CITY AP is what differs

Mechanicsburg→Camp Hill→Lower Allen→Steelton→Lemoyne→Shiremanstown→

Or put two places side by side: New Cumberland vs Mechanicsburg

Best time to visitNew Cumberland.