United States · 1991–2020

Best time to visit
Otterville.

September leads for comfortable weather in Otterville: typically 26.5°C by day, 12.7°C at night, with 88 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high26.5°C

Typical low12.7°C

Rain in September88 mm

Comfort

September

September · May · June

77climate match

Beach

July

July · August · June

76climate match

Outdoors

October

October · April · September

80climate match

The weakest month is January, scoring 5 against September’s 77 — days reach only 2.7°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

52.7° / -7°

Feb

55.6° / -5°

Mar

2111.6° / 0°

Apr

4818.4° / 5.6°

May

7323.7° / 12.1°

Jun

6728.4° / 17°

Jul

6030.6° / 19°

Aug

6629.8° / 17.3°

Sep

7726.5° / 12.7°

Oct

6019.8° / 6.3°

Nov

2211.8° / 0.6°

Dec

55.3° / -4.3°

Monthly climate evidence for Otterville — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	2.7°C	-7°C	63 mm	6.1	9 h 42	5	Strong coverage
February	5.6°C	-5°C	58 mm	6	10 h 40	5	Strong coverage
March	11.6°C	0°C	81 mm	8.1	11 h 50	21	Strong coverage
April	18.4°C	5.6°C	116 mm	9.3	13 h 10	48	Strong coverage
May	23.7°C	12.1°C	133 mm	10.5	14 h 17	73	Strong coverage
June	28.4°C	17°C	105 mm	8	14 h 54	67	Strong coverage
July	30.6°C	19°C	89 mm	6.9	14 h 39	60	Strong coverage
August	29.8°C	17.3°C	95 mm	6.3	13 h 41	66	Strong coverage
September	26.5°C	12.7°C	88 mm	6.1	12 h 24	77	Strong coverage
October	19.8°C	6.3°C	82 mm	7	11 h 06	60	Strong coverage
November	11.8°C	0.6°C	90 mm	7.3	9 h 59	22	Strong coverage
December	5.3°C	-4.3°C	65 mm	6.3	9 h 26	5	Strong coverage

What has changed

Otterville runs +0.2°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

+0.4

Feb

+0.2

Mar

+0.7

Apr

-0.5

May

-0.2

Jun

+0.3

Jul

-0.6

Aug

-0.7

Sep

+0.8

Oct

0.0

Nov

-0.3

Dec

+2.0

September daytime highs, 2011–2025. Last recorded: 29.4°C.

Records at JERSEYVILLE 2 SW, 1940–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	23.3°C24 Jan 1950	-31.7°C17 Jan 1977	74 mm11 Jan 2020	198 mm2005 · driest 1 mm in 1986	82
February	27.8°C28 Feb 2024	-30.0°C9 Feb 1979	56 mm6 Feb 2008	165 mm1951 · driest 4 mm in 2026	82
March	33.9°C27 Mar 2026	-23.9°C5 Mar 1960	72 mm12 Mar 1977	180 mm1948 · driest 14 mm in 1971	83
April	33.3°C28 Apr 1951	-7.8°C2 Apr 1961	103 mm30 Apr 2017	314 mm1994 · driest 29 mm in 1976	82
May	35.6°C26 May 1953	-2.2°C4 May 1976	115 mm26 May 2008	314 mm2019 · driest 17 mm in 1986	78
June	40.0°C26 Jun 1954	2.8°C1 Jun 1972	91 mm12 Jun 2002	247 mm1957 · driest 4 mm in 1959	80
July	44.4°C15 Jul 1954	3.3°C20 Jul 1944	138 mm27 Jul 2025	265 mm2016 · driest 5 mm in 2012	81
August	40.6°C3 Aug 1964	3.3°C29 Aug 1986	148 mm11 Aug 1961	259 mm1961 · driest 0 mm in 2025	81
September	38.9°C4 Sep 1954	-4.4°C28 Sep 1942	96 mm9 Sep 1989	277 mm2008 · driest 0 mm in 1940	81
October	33.9°C2 Oct 1953	-8.3°C24 Oct 1981	142 mm2 Oct 2014	290 mm2009 · driest 8 mm in 1964	81
November	28.9°C1 Nov 1950	-18.9°C30 Nov 1964	89 mm18 Nov 2003	261 mm1985 · driest 2 mm in 1949	83
December	24.4°C29 Dec 2025	-28.3°C22 Dec 1989	130 mm3 Dec 1982	254 mm2015 · driest 2 mm in 1958	83

Typical days per month at JERSEYVILLE 2 SW, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	27	2	2
February	0	0	23	2	2
March	1	0	17	3	<1
April	6	<1	5	4	0
May	15	4	<1	4	0
June	25	12	0	4	0
July	29	19	0	3	0
August	29	16	0	3	0
September	20	8	<1	3	0
October	7	1	4	3	0
November	<1	0	15	3	<1
December	0	0	25	2	2

How often, not how much — every day in JERSEYVILLE 2 SW’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%	18%	5%	15%	-0.5–6.7°C
February	2%	21%	6%	19%	1.2–9.2°C
March	12%	26%	10%	28%	8.4–15.1°C
April	33%	30%	12%	37%	16.1–21.8°C
May	58%	30%	12%	37%	21.5–26.8°C
June	73%	26%	12%	26%	27.2–30.9°C
July	77%	23%	11%	21%	29.4–33.0°C
August	80%	20%	9%	17%	28.2–32.3°C
September	75%	20%	9%	17%	24.5–29.2°C
October	46%	22%	8%	22%	18.0–23.1°C
November	11%	23%	9%	22%	8.7–14.9°C
December	1%	20%	7%	19%	2.4–8.5°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.

1941Each stripe is one year’s mean temperature against the 70-year average. Warmest: 1954. Coolest: 2014.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4246497
NOAA station: USC00114489 · JERSEYVILLE 2 SW
Station distance: 7.5 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 27 usable years
Daylight: Calculated from latitude 39.05°, 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 JERSEYVILLE 2 SW is what differs

Jerseyville→Brighton→Kane→Medora→Fieldon→Rockbridge→

Or put two places side by side: Otterville vs Jerseyville

Best time to visitOtterville.