United States · 1991–2020

Best time to visit
Winchester.

September leads for comfortable weather in Winchester: typically 26.2°C by day, 13.6°C at night, with 101 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high26.2°C

Typical low13.6°C

Rain in September101 mm

Comfort

September

September · May · October

77climate match

Beach

August

August · July · June

70climate match

Outdoors

October

October · April · May

84climate match

The weakest month is January, scoring 5 against September’s 77 — days reach only 3°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° / -7.2°

Feb

86.9° / -4.4°

Mar

3012.9° / 0.2°

Apr

5518.9° / 6.2°

May

7624° / 11.9°

Jun

6028.6° / 17°

Jul

5031.5° / 19.9°

Aug

5531.2° / 18.9°

Sep

7726.2° / 13.6°

Oct

6419.8° / 7.3°

Nov

2811.2° / 0.5°

Dec

54.8° / -5.2°

Monthly climate evidence for Winchester — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	3°C	-7.2°C	24 mm	3.4	9 h 41	5	Good coverage
February	6.9°C	-4.4°C	35 mm	3.3	10 h 39	8	Good coverage
March	12.9°C	0.2°C	62 mm	5.8	11 h 49	30	Good coverage
April	18.9°C	6.2°C	93 mm	7.9	13 h 11	55	Good coverage
May	24°C	11.9°C	131 mm	8.4	14 h 18	76	Good coverage
June	28.6°C	17°C	146 mm	8.9	14 h 55	60	Good coverage
July	31.5°C	19.9°C	120 mm	7.6	14 h 41	50	Good coverage
August	31.2°C	18.9°C	114 mm	6.7	13 h 42	55	Good coverage
September	26.2°C	13.6°C	101 mm	6.9	12 h 24	77	Good coverage
October	19.8°C	7.3°C	77 mm	6	11 h 06	64	Good coverage
November	11.2°C	0.5°C	54 mm	4.4	9 h 58	28	Good coverage
December	4.8°C	-5.2°C	41 mm	3.5	9 h 25	5	Good coverage

Records at OSKALOOSA 4 NE, 1958–2011
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	22.8°C8 Jan 2003	-28.9°C10 Jan 1982	45 mm31 Jan 1988	61 mm2005 · driest 0 mm in 1986	53
February	27.8°C29 Feb 1972	-26.1°C2 Feb 1996	52 mm21 Feb 1997	95 mm2001 · driest 0 mm in 2006	52
March	30.6°C31 Mar 1966	-23.9°C4 Mar 1978	61 mm15 Mar 2001	254 mm1973 · driest 3 mm in 1966	52
April	33.3°C23 Apr 1965	-12.2°C3 Apr 1975	82 mm5 Apr 1969	227 mm1969 · driest 14 mm in 2000	51
May	34.4°C19 May 2006	-2.2°C3 May 1976	113 mm27 May 1985	300 mm1982 · driest 32 mm in 1994	52
June	42.8°C27 Jun 1980	6.1°C3 Jun 1969	117 mm13 Jun 1966	431 mm1967 · driest 19 mm in 1959	52
July	43.3°C30 Jul 1980	8.9°C5 Jul 1972	166 mm27 Jul 1981	405 mm1993 · driest 3 mm in 1983	52
August	42.2°C21 Aug 2003	5.6°C31 Aug 1967	114 mm18 Aug 1960	302 mm2005 · driest 7 mm in 2000	51
September	42.2°C2 Sep 2000	-1.7°C23 Sep 1983	134 mm9 Sep 1989	270 mm1977 · driest 19 mm in 1990	52
October	36.1°C5 Oct 1963	-8.9°C31 Oct 1993	249 mm2 Oct 2005	288 mm2005 · driest 3 mm in 1964	52
November	28.9°C8 Nov 1980	-18.3°C28 Nov 1976	104 mm16 Nov 1964	184 mm1998 · driest 0 mm in 1969	51
December	21.1°C5 Dec 1980	-31.1°C22 Dec 1989	51 mm9 Dec 1997	121 mm1997 · driest 0 mm in 1979	53

Typical days per month at OSKALOOSA 4 NE, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	28	<1	2
February	0	0	21	1	2
March	1	<1	15	2	<1
April	6	<1	4	3	<1
May	14	4	<1	4	0
June	25	12	0	5	0
July	28	21	0	4	0
August	28	19	0	3	0
September	19	6	<1	4	0
October	6	<1	3	2	<1
November	<1	0	14	2	<1
December	0	0	25	1	2

How often, not how much — every day in OSKALOOSA 4 NE’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%	12%	3%	5%	-0.8–7.5°C
February	3%	13%	3%	7%	1.9–10.5°C
March	19%	19%	7%	19%	9.5–16.3°C
April	43%	25%	10%	28%	16.5–21.8°C
May	62%	30%	14%	37%	22.5–26.9°C
June	70%	30%	15%	36%	27.2–30.9°C
July	77%	23%	10%	23%	30.1–34.1°C
August	79%	22%	10%	22%	29.0–34.4°C
September	72%	23%	11%	21%	24.2–29.1°C
October	49%	20%	9%	20%	17.8–22.5°C
November	12%	15%	6%	10%	8.2–14.8°C
December	<1%	13%	4%	7%	1.2–8.2°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.

1959Each stripe is one year’s mean temperature against the 48-year average. Warmest: 1998. Coolest: 2008.2010

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4281882
NOAA station: USC00146100 · OSKALOOSA 4 NE
Station distance: 8.9 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 19 usable years
Daylight: Calculated from latitude 39.32°, 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 OSKALOOSA 4 NE is what differs

Oskaloosa→McLouth→Dunavant→Jarbalo→Springdale→

Or put two places side by side: Winchester vs Oskaloosa

Best time to visitWinchester.