United States · 1991–2020

Best time to visit
New Castle.

September leads for comfortable weather in New Castle: typically 25.6°C by day, 11°C at night, with 92 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high25.6°C

Typical low11°C

Rain in September92 mm

Comfort

September

September · June · August

75climate match

Beach

August

August · July · June

65climate match

Outdoors

October

October · May · September

71climate match

The weakest month is January, scoring 5 against September’s 75 — days reach only 2.6°C, 21° 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

52.6° / -7°

Feb

54° / -7°

Mar

89.6° / -3.1°

Apr

3817.1° / 2.3°

May

6722.5° / 8°

Jun

6927.2° / 13.2°

Jul

6329.5° / 15.4°

Aug

6829.2° / 14.8°

Sep

7525.6° / 11°

Oct

5218.7° / 4.8°

Nov

1911.3° / -0.2°

Dec

55.2° / -3.9°

Monthly climate evidence for New Castle — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	2.6°C	-7°C	77 mm	11.2	9 h 32	5	Strong coverage
February	4°C	-7°C	60 mm	8.7	10 h 34	5	Strong coverage
March	9.6°C	-3.1°C	76 mm	9.4	11 h 49	8	Strong coverage
April	17.1°C	2.3°C	96 mm	11.8	13 h 15	38	Strong coverage
May	22.5°C	8°C	97 mm	11.1	14 h 27	67	Strong coverage
June	27.2°C	13.2°C	111 mm	10.8	15 h 06	69	Strong coverage
July	29.5°C	15.4°C	117 mm	10	14 h 51	63	Strong coverage
August	29.2°C	14.8°C	99 mm	9	13 h 48	68	Strong coverage
September	25.6°C	11°C	92 mm	8.2	12 h 25	75	Strong coverage
October	18.7°C	4.8°C	79 mm	9.8	11 h 02	52	Strong coverage
November	11.3°C	-0.2°C	74 mm	9.6	9 h 50	19	Strong coverage
December	5.2°C	-3.9°C	78 mm	9.7	9 h 14	5	Strong coverage

Records at NEW CASTLE 1 N, 1894–2020
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	23.9°C25 Jan 1950	-32.8°C19 Jan 1994	46 mm18 Jan 1910	191 mm1910 · driest 17 mm in 1981	116
February	23.9°C27 Feb 2000	-30.6°C28 Feb 1934	37 mm10 Feb 1959	141 mm1956 · driest 5 mm in 1987	115
March	29.4°C24 Mar 1910	-28.3°C1 Mar 1934	65 mm29 Mar 1985	155 mm2008 · driest 0 mm in 1910	115
April	35.0°C24 Apr 1915	-16.1°C1 Apr 1923	72 mm5 Apr 1929	199 mm1918 · driest 19 mm in 1941	112
May	35.0°C31 May 1919	-6.1°C1 May 1923	85 mm27 May 1946	253 mm1946 · driest 21 mm in 1934	113
June	37.2°C26 Jun 1952	-1.1°C11 Jun 1972	66 mm26 Jun 1938	288 mm2015 · driest 17 mm in 1933	111
July	40.6°C23 Jul 2011	3.3°C9 Jul 1963	74 mm14 Jul 1937	278 mm1958 · driest 23 mm in 1911	113
August	40.0°C6 Aug 1918	0.0°C29 Aug 1982	83 mm26 Aug 1912	187 mm2007 · driest 14 mm in 1910	112
September	37.8°C2 Sep 1953	-3.3°C28 Sep 1909	203 mm9 Sep 2004	277 mm2004 · driest 16 mm in 1960	112
October	32.8°C2 Oct 1927	-8.3°C29 Oct 1965	98 mm8 Oct 1998	274 mm1954 · driest 4 mm in 1924	112
November	28.3°C3 Nov 1961	-18.3°C28 Nov 1950	58 mm3 Nov 1999	259 mm1985 · driest 14 mm in 1917	112
December	24.4°C3 Dec 1982	-27.2°C17 Dec 1951	56 mm1 Dec 2010	146 mm2012 · driest 12 mm in 1917	114

Typical days per month at NEW CASTLE 1 N, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	26	2	7
February	0	0	25	2	5
March	<1	0	22	3	2
April	4	<1	11	3	<1
May	11	3	1	3	0
June	22	9	0	4	0
July	28	15	0	4	0
August	27	14	0	3	0
September	18	6	<1	3	0
October	5	<1	5	3	0
November	<1	0	16	2	1
December	0	0	24	3	4

How often, not how much — every day in NEW CASTLE 1 N’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%	34%	7%	41%	-1.4–5.9°C
February	<1%	32%	6%	39%	0.1–7.3°C
March	8%	34%	8%	47%	5.8–13.2°C
April	23%	37%	10%	48%	13.6–19.8°C
May	48%	35%	11%	48%	20.0–25.5°C
June	65%	33%	13%	41%	25.2–29.1°C
July	70%	30%	12%	34%	27.5–31.2°C
August	73%	27%	10%	31%	26.7–30.3°C
September	65%	26%	9%	29%	23.1–27.8°C
October	35%	29%	7%	33%	16.1–21.2°C
November	8%	33%	7%	42%	8.0–14.1°C
December	<1%	32%	7%	42%	0.9–7.9°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.

1904Each stripe is one year’s mean temperature against the 104-year average. Warmest: 2016. Coolest: 1904.2019

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5203127
NOAA station: USC00366233 · NEW CASTLE 1 N
Station distance: 1.9 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 25 usable years
Daylight: Calculated from latitude 41.00°, 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 NEW CASTLE 1 N is what differs

Struthers→Ellwood City→Poland→Oakwood→New Wilmington→New Middletown→

Or put two places side by side: New Castle vs Struthers

Best time to visitNew Castle.