United States · 1991–2020

Best time to visit
Keysburg.

September leads for comfortable weather in Keysburg: typically 28.1°C by day, 14.5°C at night, with 95 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high28.1°C

Typical low14.5°C

Rain in September95 mm

Comfort

September

September · May · October

74climate match

Beach

August

August · June · July

72climate match

Outdoors

October

October · April · November

75climate match

The weakest month is January, scoring 5 against September’s 74 — days reach only 7.5°C, 16° below the 24°C the score treats as ideal, and nights drop to -3.3°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

57.5° / -3.3°

Feb

89.9° / -1.9°

Mar

2915° / 2.4°

Apr

5620.7° / 7.5°

May

7125.2° / 13°

Jun

6229.6° / 17.6°

Jul

5231.5° / 19.5°

Aug

5831.3° / 18.4°

Sep

7428.1° / 14.5°

Oct

6821.9° / 8°

Nov

3514.9° / 2.6°

Dec

59.4° / -1.2°

Monthly climate evidence for Keysburg — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	7.5°C	-3.3°C	107 mm	8.9	9 h 54	5	Strong coverage
February	9.9°C	-1.9°C	110 mm	8.5	10 h 47	8	Strong coverage
March	15°C	2.4°C	122 mm	10.1	11 h 51	29	Strong coverage
April	20.7°C	7.5°C	133 mm	9.8	13 h 05	56	Strong coverage
May	25.2°C	13°C	142 mm	10.5	14 h 06	71	Strong coverage
June	29.6°C	17.6°C	108 mm	8.8	14 h 39	62	Strong coverage
July	31.5°C	19.5°C	112 mm	8.3	14 h 26	52	Strong coverage
August	31.3°C	18.4°C	93 mm	6.8	13 h 33	58	Strong coverage
September	28.1°C	14.5°C	95 mm	6.7	12 h 22	74	Strong coverage
October	21.9°C	8°C	101 mm	7	11 h 11	68	Strong coverage
November	14.9°C	2.6°C	97 mm	7.9	10 h 10	35	Strong coverage
December	9.4°C	-1.2°C	120 mm	9.4	9 h 40	5	Strong coverage

What has changed

Keysburg runs +0.9°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

+1.9

Mar

+1.3

Apr

+0.5

May

+0.5

Jun

+0.7

Jul

+0.5

Aug

0.0

Sep

+0.8

Oct

+1.1

Nov

+0.3

Dec

+1.9

September daytime highs, 2011–2025. Last recorded: 29.3°C.

Records at SPRINGFIELD EXP STN, 1942–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	25.0°C24 Jan 1943	-27.8°C24 Jan 1963	111 mm23 Jan 1999	355 mm1950 · driest 22 mm in 1970	84
February	27.8°C24 Feb 1996	-25.0°C2 Feb 1951	110 mm13 Feb 1948	299 mm2019 · driest 6 mm in 1947	85
March	31.1°C23 Mar 2026	-17.2°C3 Mar 1980	109 mm12 Mar 1975	399 mm1975 · driest 40 mm in 1966	85
April	31.7°C20 Apr 2002	-8.9°C8 Apr 2007	106 mm28 Apr 2013	276 mm1979 · driest 26 mm in 1986	84
May	35.6°C5 May 1952	-1.1°C4 May 1976	175 mm9 May 2024	404 mm2024 · driest 9 mm in 2005	85
June	41.1°C30 Jun 2012	4.4°C1 Jun 1966	90 mm5 Jun 1998	281 mm2019 · driest 7 mm in 1944	85
July	41.1°C28 Jul 1952	8.3°C6 Jul 1972	112 mm7 Jul 2016	247 mm2016 · driest 23 mm in 1944	83
August	41.1°C17 Aug 2007	5.6°C31 Aug 1946	123 mm26 Aug 2019	259 mm2019 · driest 5 mm in 2008	84
September	40.0°C5 Sep 1954	-0.6°C26 Sep 2001	188 mm1 Sep 2017	257 mm1979 · driest 8 mm in 2019	83
October	36.1°C2 Oct 2019	-5.6°C28 Oct 2001	102 mm5 Oct 1944	235 mm2019 · driest 0 mm in 2024	82
November	30.6°C2 Nov 2016	-20.6°C25 Nov 1950	126 mm27 Nov 1973	266 mm1973 · driest 23 mm in 2009	84
December	25.0°C31 Dec 1951	-26.7°C22 Dec 1989	89 mm12 Dec 1949	329 mm1990 · driest 27 mm in 1958	84

Typical days per month at SPRINGFIELD EXP STN, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	23	4	1
February	<1	0	19	4	2
March	3	<1	12	4	<1
April	8	<1	3	4	0
May	18	5	<1	4	0
June	27	16	0	4	0
July	30	23	0	4	0
August	30	21	0	3	0
September	23	12	0	3	0
October	11	2	3	3	0
November	1	<1	12	3	0
December	0	0	19	4	<1

The best month has moved. On the 1961–1990 numbers the strongest month here was September (scoring 81); on 2011–2025 it is May (78). Both are scored the same way, from the same station — only the climate underneath changed.

How often, not how much — every day in SPRINGFIELD EXP STN’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	2%	29%	12%	35%	3.7–11.0°C
February	5%	30%	13%	36%	5.7–13.0°C
March	18%	31%	14%	39%	11.5–17.7°C
April	39%	32%	13%	43%	18.7–22.9°C
May	59%	32%	13%	39%	22.8–27.3°C
June	72%	27%	11%	32%	27.9–31.4°C
July	73%	28%	11%	29%	29.8–33.4°C
August	78%	23%	9%	22%	29.3–33.3°C
September	75%	22%	9%	20%	25.7–30.3°C
October	53%	21%	9%	19%	19.6–24.4°C
November	17%	27%	12%	30%	11.9–17.5°C
December	3%	28%	13%	35%	5.9–12.2°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.

1944Each stripe is one year’s mean temperature against the 81-year average. Warmest: 1953. Coolest: 1976.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4296976
NOAA station: USC00408562 · SPRINGFIELD EXP STN
Station distance: 24.9 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 30 usable years
Daylight: Calculated from latitude 36.65°, 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 SPRINGFIELD EXP STN is what differs

Springfield→Greenbrier→Coopertown→Adams→Cedar Hill→Hilltop→

Or put two places side by side: Keysburg vs Springfield

Best time to visitKeysburg.

September

August

October

The whole year,without the guesswork.

Keysburg runs +0.9°Con the 1961–1990 baseline.

Nearby, measured,and named.

Best time to visit
Keysburg.

The whole year,
without the guesswork.

Keysburg runs +0.9°C
on the 1961–1990 baseline.

Nearby, measured,
and named.