United States · 1991–2020

Best time to visit
South Coatesville.

September leads for comfortable weather in South Coatesville: typically 24.1°C by day, 12.3°C at night, with 144 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high24.1°C

Typical low12.3°C

Rain in September144 mm

Comfort

September

September · June · May

75climate match

Beach

July

July · August · June

71climate match

Outdoors

May

May · October · April

74climate match

The weakest month is January, scoring 5 against September’s 75 — days reach only 3.7°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

53.7° / -5.5°

Feb

55° / -5.3°

Mar

59.9° / -1.3°

Apr

4117° / 4.1°

May

7122.4° / 9.4°

Jun

7327° / 14.7°

Jul

6329.3° / 17.6°

Aug

6728.7° / 16.9°

Sep

7524.1° / 12.3°

Oct

4918.1° / 5.9°

Nov

2212° / 1.1°

Dec

56° / -3.4°

Monthly climate evidence for South Coatesville — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	3.7°C	-5.5°C	111 mm	9.8	9 h 37	5	Good coverage
February	5°C	-5.3°C	78 mm	8.1	10 h 37	5	Good coverage
March	9.9°C	-1.3°C	133 mm	10.2	11 h 49	5	Good coverage
April	17°C	4.1°C	107 mm	9.6	13 h 12	41	Good coverage
May	22.4°C	9.4°C	93 mm	9.5	14 h 22	71	Good coverage
June	27°C	14.7°C	111 mm	9.4	14 h 59	73	Good coverage
July	29.3°C	17.6°C	109 mm	8.6	14 h 45	63	Good coverage
August	28.7°C	16.9°C	107 mm	7.7	13 h 45	67	Good coverage
September	24.1°C	12.3°C	144 mm	8.5	12 h 24	75	Good coverage
October	18.1°C	5.9°C	115 mm	7.7	11 h 04	49	Good coverage
November	12°C	1.1°C	98 mm	8.2	9 h 55	22	Good coverage
December	6°C	-3.4°C	110 mm	8.6	9 h 21	5	Good coverage

Records at COATESVILLE 2 W, 1983–2007
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	21.7°C29 Jan 2002	-25.6°C22 Jan 1984	61 mm3 Jan 1999	208 mm1996 · driest 40 mm in 1985	24
February	23.3°C24 Feb 1985	-20.6°C6 Feb 1996	46 mm22 Feb 2003	167 mm2003 · driest 15 mm in 2002	24
March	31.1°C30 Mar 1998	-20.0°C10 Mar 1984	91 mm21 Mar 2000	248 mm1993 · driest 24 mm in 2006	25
April	33.3°C17 Apr 2002	-6.1°C5 Apr 1995	81 mm15 Apr 2007	235 mm1983 · driest 18 mm in 1985	25
May	34.4°C20 May 1996	-1.7°C4 May 1986	78 mm29 May 1990	269 mm1989 · driest 27 mm in 1991	25
June	35.6°C16 Jun 1991	2.2°C3 Jun 1986	79 mm26 Jun 2006	277 mm2006 · driest 16 mm in 1988	25
July	37.8°C16 Jul 1988	7.2°C4 Jul 1986	70 mm8 Jul 2005	261 mm1984 · driest 12 mm in 1999	25
August	37.8°C2 Aug 2002	3.9°C30 Aug 1986	91 mm9 Aug 2003	240 mm2003 · driest 39 mm in 1995	25
September	35.6°C11 Sep 1983	1.1°C30 Sep 2000	199 mm16 Sep 1999	368 mm1999 · driest 12 mm in 2007	23
October	31.7°C9 Oct 2007	-6.1°C31 Oct 1988	168 mm8 Oct 2005	301 mm2005 · driest 20 mm in 2001	25
November	26.7°C3 Nov 2003	-12.2°C24 Nov 1989	72 mm29 Nov 1987	192 mm1986 · driest 29 mm in 2001	25
December	23.9°C7 Dec 1998	-19.4°C25 Dec 1983	83 mm5 Dec 1993	239 mm1996 · driest 25 mm in 1998	25

Typical days per month at COATESVILLE 2 W, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	27	4	6
February	0	0	24	3	5
March	<1	<1	20	4	4
April	3	<1	6	4	<1
May	10	3	<1	3	0
June	23	8	0	4	0
July	28	14	0	3	0
August	28	12	0	3	0
September	14	2	0	4	0
October	3	<1	4	3	0
November	<1	0	14	3	<1
December	0	0	25	4	3

How often, not how much — every day in COATESVILLE 2 W’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%	31%	11%	37%	-0.1–7.4°C
February	<1%	29%	10%	31%	1.9–8.4°C
March	7%	31%	12%	40%	7.4–12.2°C
April	22%	32%	11%	42%	14.6–18.7°C
May	50%	32%	12%	40%	20.3–24.5°C
June	69%	29%	11%	37%	25.4–28.2°C
July	71%	29%	12%	31%	27.4–30.9°C
August	75%	25%	10%	25%	26.6–30.0°C
September	63%	27%	12%	32%	22.9–25.9°C
October	31%	25%	11%	27%	16.1–20.3°C
November	6%	29%	12%	30%	9.5–14.1°C
December	<1%	28%	11%	31%	2.3–8.9°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.

1984Each stripe is one year’s mean temperature against the 22-year average. Warmest: 1998. Coolest: 1996.2007

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4561345
NOAA station: USC00361591 · COATESVILLE 2 W
Station distance: 3.6 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 15 usable years
Daylight: Calculated from latitude 39.97°, 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 COATESVILLE 2 W is what differs

Coatesville→Parkesburg→Caln→Atglen→Christiana→Westwood→

Or put two places side by side: South Coatesville vs Coatesville

Best time to visitSouth Coatesville.

September

July

May

The whole year,without the guesswork.

Nearby, measured,and named.

Best time to visit
South Coatesville.

The whole year,
without the guesswork.

Nearby, measured,
and named.