United States · 1991–2020

Best time to visit
Lancaster.

August leads for comfortable weather in Lancaster: typically 25.9°C by day, 15.5°C at night, with 98 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortAugust

Typical high25.9°C

Typical low15.5°C

Rain in August98 mm

Comfort

August

August · June · September

80climate match

Beach

July

July · August · June

60climate match

Outdoors

May

May · September · October

76climate match

The weakest month is January, scoring 5 against August’s 80 — days reach only -3.9°C, 28° 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

5-3.9° / -12.7°

Feb

5-1.4° / -10.6°

Mar

55.8° / -4°

Apr

2913.5° / 2.5°

May

5819.9° / 8.9°

Jun

7425° / 14.6°

Jul

7026.9° / 16.6°

Aug

8025.9° / 15.5°

Sep

7322.1° / 10.9°

Oct

4214.9° / 4.1°

Nov

56.3° / -2.5°

Dec

5-0.8° / -8.9°

Monthly climate evidence for Lancaster — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	-3.9°C	-12.7°C	30 mm	5.5	9 h 21	5	Strong coverage
February	-1.4°C	-10.6°C	33 mm	5.6	10 h 28	5	Strong coverage
March	5.8°C	-4°C	51 mm	6.6	11 h 47	5	Strong coverage
April	13.5°C	2.5°C	97 mm	8.8	13 h 19	29	Strong coverage
May	19.9°C	8.9°C	113 mm	10.6	14 h 37	58	Strong coverage
June	25°C	14.6°C	149 mm	9.8	15 h 19	74	Strong coverage
July	26.9°C	16.6°C	127 mm	8.1	15 h 02	70	Strong coverage
August	25.9°C	15.5°C	98 mm	7.8	13 h 55	80	Strong coverage
September	22.1°C	10.9°C	102 mm	7.6	12 h 26	73	Strong coverage
October	14.9°C	4.1°C	74 mm	6.6	10 h 58	42	Strong coverage
November	6.3°C	-2.5°C	59 mm	5.6	9 h 40	5	Strong coverage
December	-0.8°C	-8.9°C	42 mm	6.1	9 h 02	5	Strong coverage

What has changed

Lancaster runs -0.1°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

+0.7

Feb

-0.7

Mar

+0.8

Apr

-1.2

May

-0.8

Jun

-0.4

Jul

-0.9

Aug

-0.8

Sep

+0.7

Oct

-0.4

Nov

+0.1

Dec

+1.9

August daytime highs, 2011–2025. Last recorded: 25.7°C.

Records at LANCASTER 4 WSW, 1893–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	15.6°C1 Jan 1897	-35.0°C23 Jan 1963	52 mm29 Jan 2013	89 mm1969 · driest 1 mm in 2025	130
February	21.7°C28 Feb 2024	-35.0°C2 Feb 1996	51 mm26 Feb 2002	93 mm2002 · driest 1 mm in 1987	129
March	28.9°C30 Mar 1986	-30.0°C1 Mar 1962	91 mm31 Mar 1998	149 mm1938 · driest 0 mm in 1910	129
April	35.0°C22 Apr 1980	-14.4°C6 Apr 1982	116 mm25 Apr 2008	285 mm2008 · driest 15 mm in 1936	127
May	40.0°C31 May 1934	-5.0°C2 May 1908	81 mm15 May 1909	280 mm2004 · driest 12 mm in 1934	126
June	37.8°C21 Jun 1988	1.7°C12 Jun 1903	117 mm25 Jun 2005	321 mm2008 · driest 11 mm in 1988	127
July	42.2°C14 Jul 1936	5.6°C8 Jul 1901	157 mm26 Jul 1940	293 mm1950 · driest 0 mm in 1894	126
August	39.4°C18 Aug 1988	1.1°C30 Aug 1915	114 mm21 Aug 1966	317 mm2007 · driest 12 mm in 1955	128
September	37.8°C7 Sep 1939	-6.7°C30 Sep 1899	146 mm13 Sep 1961	472 mm2019 · driest 2 mm in 2004	130
October	33.3°C6 Oct 1963	-16.1°C29 Oct 1925	81 mm2 Oct 2018	272 mm2018 · driest 0 mm in 1952	127
November	25.0°C7 Nov 1915	-26.1°C26 Nov 1977	102 mm4 Nov 2003	188 mm1992 · driest 0 mm in 1976	128
December	20.0°C16 Dec 2021	-32.8°C19 Dec 1983	52 mm13 Dec 1991	108 mm2015 · driest 2 mm in 1910	128

Typical days per month at LANCASTER 4 WSW, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	30	<1	6
February	0	0	27	<1	6
March	<1	0	24	2	4
April	1	0	9	3	1
May	7	<1	<1	4	<1
June	17	3	0	5	0
July	23	6	0	4	0
August	20	4	0	3	0
September	10	1	<1	3	0
October	2	<1	8	2	<1
November	0	0	21	2	2
December	0	0	29	1	6

The best month has moved. On the 1961–1990 numbers the strongest month here was June (scoring 81); on 2011–2025 it is August (82). Both are scored the same way, from the same station — only the climate underneath changed.

How often, not how much — every day in LANCASTER 4 WSW’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	0%	16%	3%	10%	-7.3–0.4°C
February	<1%	16%	3%	11%	-5.2–3.0°C
March	3%	22%	6%	22%	2.3–9.9°C
April	17%	28%	10%	33%	11.4–17.1°C
May	42%	31%	12%	36%	18.2–23.7°C
June	65%	30%	13%	35%	23.5–28.1°C
July	74%	26%	11%	26%	26.1–30.7°C
August	75%	24%	11%	23%	25.1–29.4°C
September	56%	25%	11%	25%	20.7–25.3°C
October	25%	20%	7%	19%	13.0–19.4°C
November	2%	19%	6%	13%	3.1–10.1°C
December	0%	17%	4%	11%	-4.1–3.0°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.

1893Each stripe is one year’s mean temperature against the 115-year average. Warmest: 1931. Coolest: 1893.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5259448
NOAA station: USC00474546 · LANCASTER 4 WSW
Station distance: 6.7 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 30 usable years
Daylight: Calculated from latitude 42.85°, 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 LANCASTER 4 WSW is what differs

Bloomington→Potosi→Mount Hope→Cameron→Waupeton→Beetown→

Or put two places side by side: Lancaster vs Bloomington

Best time to visitLancaster.

August

July

May

The whole year,without the guesswork.

Lancaster runs -0.1°Con the 1961–1990 baseline.

Nearby, measured,and named.

Best time to visit
Lancaster.

The whole year,
without the guesswork.

Lancaster runs -0.1°C
on the 1961–1990 baseline.

Nearby, measured,
and named.