United States · 1991–2020

Best time to visit
Guilford Siding.

September leads for comfortable weather in Guilford Siding: typically 24.7°C by day, 13.2°C at night, with 103 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high24.7°C

Typical low13.2°C

Rain in September103 mm

Comfort

September

September · May · June

81climate match

Beach

July

July · August · June

73climate match

Outdoors

October

October · May · April

74climate match

The weakest month is January, scoring 5 against September’s 81 — days reach only 3.4°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

53.4° / -5.1°

Feb

55.4° / -4.2°

Mar

1710.8° / -0.1°

Apr

4717.7° / 5.3°

May

7323° / 10.8°

Jun

7127.5° / 15.8°

Jul

6229.8° / 18.1°

Aug

6728.7° / 17.2°

Sep

8124.7° / 13.2°

Oct

5418.1° / 6.9°

Nov

2711.8° / 1.6°

Dec

55.6° / -2.6°

Monthly climate evidence for Guilford Siding — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	3.4°C	-5.1°C	82 mm	8	9 h 38	5	Strong coverage
February	5.4°C	-4.2°C	65 mm	7.4	10 h 38	5	Strong coverage
March	10.8°C	-0.1°C	89 mm	8.6	11 h 49	17	Strong coverage
April	17.7°C	5.3°C	101 mm	9.6	13 h 12	47	Strong coverage
May	23°C	10.8°C	105 mm	10.4	14 h 21	73	Strong coverage
June	27.5°C	15.8°C	104 mm	9.6	14 h 59	71	Strong coverage
July	29.8°C	18.1°C	96 mm	8.9	14 h 44	62	Strong coverage
August	28.7°C	17.2°C	96 mm	8.3	13 h 44	67	Strong coverage
September	24.7°C	13.2°C	103 mm	7.6	12 h 24	81	Strong coverage
October	18.1°C	6.9°C	93 mm	7.7	11 h 05	54	Strong coverage
November	11.8°C	1.6°C	73 mm	6.5	9 h 55	27	Strong coverage
December	5.6°C	-2.6°C	86 mm	7.6	9 h 21	5	Strong coverage

What has changed

Guilford Siding runs +1.0°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

+1.4

Feb

+2.2

Mar

+1.4

Apr

+1.1

May

+0.6

Jun

+0.4

Jul

+1.1

Aug

+0.1

Sep

+0.3

Oct

+0.6

Nov

+0.7

Dec

+2.1

September daytime highs, 2011–2024. Last recorded: 24.0°C.

Records at CHAMBERSBURG 1 ESE, 1894–2025
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	25.0°C13 Jan 1932	-29.4°C21 Jan 1994	55 mm1 Jan 2003	198 mm1978 · driest 5 mm in 1981	111
February	26.1°C27 Feb 1997	-26.7°C2 Feb 1961	81 mm14 Feb 1984	140 mm1998 · driest 7 mm in 1901	111
March	31.1°C30 Mar 1998	-22.2°C18 Mar 1900	58 mm29 Mar 1984	189 mm1993 · driest 11 mm in 2006	112
April	34.4°C24 Apr 1925	-13.3°C1 Apr 1923	91 mm20 Apr 1901	233 mm1901 · driest 11 mm in 1985	113
May	36.7°C15 May 1944	-3.9°C10 May 1947	70 mm5 May 2017	209 mm2003 · driest 14 mm in 1951	112
June	38.9°C29 Jun 1934	0.0°C1 Jun 1930	118 mm22 Jun 1972	288 mm1972 · driest 10 mm in 1991	113
July	41.7°C10 Jul 1936	5.0°C14 Jul 1895	130 mm30 Jul 1923	228 mm1970 · driest 8 mm in 1937	111
August	40.6°C4 Aug 1930	2.8°C29 Aug 1986	81 mm20 Aug 1947	219 mm1933 · driest 9 mm in 2006	112
September	38.3°C1 Sep 1932	-2.2°C24 Sep 1963	116 mm1 Sep 1952	253 mm1975 · driest 4 mm in 1943	109
October	35.0°C5 Oct 1941	-7.8°C28 Oct 1976	102 mm11 Oct 2013	259 mm1976 · driest 3 mm in 1963	109
November	27.8°C1 Nov 1950	-15.6°C27 Nov 1938	88 mm7 Nov 1997	204 mm1997 · driest 15 mm in 1930	109
December	23.9°C29 Dec 1984	-25.0°C23 Dec 1960	70 mm24 Dec 2020	172 mm1983 · driest 6 mm in 1955	111

Typical days per month at CHAMBERSBURG 1 ESE, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	26	3	4
February	<1	0	23	2	4
March	<1	<1	17	3	2
April	4	<1	5	4	<1
May	12	3	<1	4	0
June	23	9	0	4	0
July	29	16	0	3	0
August	27	12	0	3	0
September	14	4	0	3	0
October	4	<1	2	3	0
November	<1	0	12	3	<1
December	0	0	23	3	2

How often, not how much — every day in CHAMBERSBURG 1 ESE’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%	28%	9%	27%	0.4–6.2°C
February	1%	26%	8%	28%	1.6–8.4°C
March	8%	30%	10%	34%	7.5–14.0°C
April	26%	32%	11%	41%	15.1–19.7°C
May	53%	34%	11%	43%	20.8–25.3°C
June	67%	32%	12%	37%	25.8–29.6°C
July	71%	30%	10%	31%	28.0–32.2°C
August	72%	28%	11%	27%	27.2–30.7°C
September	68%	25%	10%	25%	22.9–27.3°C
October	33%	24%	9%	21%	16.2–20.9°C
November	7%	25%	9%	22%	9.3–14.2°C
December	<1%	26%	10%	26%	2.2–8.3°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.

1896Each stripe is one year’s mean temperature against the 85-year average. Warmest: 2024. Coolest: 1989.2024

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4558439
NOAA station: USC00361354 · CHAMBERSBURG 1 ESE
Station distance: 7.3 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 27 usable years
Daylight: Calculated from latitude 39.87°, 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 CHAMBERSBURG 1 ESE is what differs

Chambersburg→Fayetteville→Guilford→Scotland→McConnellsburg→Marion→

Or put two places side by side: Guilford Siding vs Chambersburg

Best time to visitGuilford Siding.