United States · 1991–2020

Best time to visit
Lake Isabella.

September leads for comfortable weather in Lake Isabella: typically 22.7°C by day, 10.7°C at night, with 67 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high22.7°C

Typical low10.7°C

Rain in September67 mm

Comfort

September

September · June · August

80climate match

Beach

July

July · August · June

73climate match

Outdoors

September

September · May · June

80climate match

The weakest month is January, scoring 5 against September’s 80 — days reach only -1.6°C, 26° 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

5-1.6° / -8.9°

Feb

5-0.1° / -8.6°

Mar

55.8° / -4.5°

Apr

2412.8° / 1.1°

May

6120.5° / 7.9°

Jun

7825.9° / 13.4°

Jul

7328.6° / 16.2°

Aug

7627.3° / 15.3°

Sep

8022.7° / 10.7°

Oct

3815° / 4.8°

Nov

97.6° / -0.6°

Dec

51.3° / -5.4°

Monthly climate evidence for Lake Isabella — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	-1.6°C	-8.9°C	53 mm	6.4	9 h 16	5	Good coverage
February	-0.1°C	-8.6°C	43 mm	5.1	10 h 25	5	Good coverage
March	5.8°C	-4.5°C	45 mm	5.1	11 h 47	5	Good coverage
April	12.8°C	1.1°C	96 mm	8.8	13 h 21	24	Good coverage
May	20.5°C	7.9°C	95 mm	9.5	14 h 41	61	Good coverage
June	25.9°C	13.4°C	95 mm	8	15 h 25	78	Good coverage
July	28.6°C	16.2°C	78 mm	7.2	15 h 08	73	Good coverage
August	27.3°C	15.3°C	93 mm	7.4	13 h 59	76	Good coverage
September	22.7°C	10.7°C	67 mm	6.9	12 h 27	80	Good coverage
October	15°C	4.8°C	96 mm	9.5	10 h 56	38	Good coverage
November	7.6°C	-0.6°C	71 mm	7.6	9 h 36	9	Good coverage
December	1.3°C	-5.4°C	52 mm	5.6	8 h 57	5	Good coverage

What has changed

Lake Isabella runs +0.6°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

+1.0

Feb

+1.0

Mar

+0.8

Apr

-0.8

May

+0.2

Jun

+0.9

Jul

+1.0

Aug

+0.8

Sep

+1.0

Oct

+0.4

Nov

+0.1

Dec

+1.4

September daytime highs, 2011–2025. Last recorded: 23.7°C.

Records at CENTRAL MICHIGAN UNIV, 1895–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	15.6°C26 Jan 1950	-31.7°C28 Jan 1925	89 mm18 Jan 2004	146 mm2004 · driest 0 mm in 2009	118
February	22.8°C28 Feb 2024	-34.4°C5 Feb 1918	51 mm22 Feb 1922	97 mm1908 · driest 0 mm in 1920	119
March	30.6°C22 Mar 2012	-27.8°C3 Mar 1943	55 mm2 Mar 1976	135 mm1976 · driest 0 mm in 1910	121
April	32.8°C17 Apr 2002	-19.4°C1 Apr 1923	85 mm30 Apr 1963	201 mm2026 · driest 4 mm in 1911	118
May	36.1°C30 May 2006	-6.7°C13 May 1901	82 mm16 May 2001	180 mm2004 · driest 3 mm in 1988	119
June	39.4°C28 Jun 1901	-3.9°C4 Jun 1907	194 mm23 Jun 2017	382 mm2017 · driest 5 mm in 1921	119
July	41.1°C13 Jul 1936	-0.6°C3 Jul 1900	108 mm8 Jul 1957	256 mm2023 · driest 5 mm in 1921	113
August	42.2°C6 Aug 1918	2.2°C21 Aug 1907	102 mm12 Aug 2010	258 mm1975 · driest 1 mm in 1927	115
September	37.2°C1 Sep 1953	-2.8°C22 Sep 1974	238 mm11 Sep 1986	392 mm1986 · driest 1 mm in 1979	109
October	31.1°C17 Oct 1938	-10.6°C26 Oct 1907	107 mm24 Oct 2017	208 mm2019 · driest 4 mm in 1952	112
November	25.0°C1 Nov 1950	-21.1°C25 Nov 1950	60 mm2 Nov 1982	154 mm2005 · driest 5 mm in 1901	115
December	20.6°C6 Dec 2001	-25.6°C31 Dec 1976	89 mm25 Dec 2003	162 mm2003 · driest 3 mm in 1920	117

Typical days per month at CENTRAL MICHIGAN UNIV, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	28	2	4
February	0	0	26	1	3
March	<1	0	25	2	2
April	2	<1	13	3	<1
May	8	2	1	3	0
June	19	7	0	3	0
July	26	12	0	3	0
August	24	8	0	3	0
September	11	3	<1	2	0
October	2	0	4	3	<1
November	0	0	17	3	1
December	0	0	27	2	5

The best month has moved. On the 1961–1990 numbers the strongest month here was June (scoring 82); on 2011–2025 it is September (87). Both are scored the same way, from the same station — only the climate underneath changed.

How often, not how much — every day in CENTRAL MICHIGAN UNIV’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%	22%	4%	18%	-4.4–1.7°C
February	0%	20%	4%	15%	-3.6–2.9°C
March	2%	21%	6%	19%	2.3–9.1°C
April	14%	28%	9%	33%	10.5–16.3°C
May	44%	28%	9%	29%	17.7–23.5°C
June	70%	26%	9%	25%	23.7–28.3°C
July	76%	24%	7%	20%	27.1–31.3°C
August	76%	23%	9%	20%	25.6–29.8°C
September	58%	25%	9%	25%	20.7–25.4°C
October	22%	25%	7%	28%	13.2–19.7°C
November	2%	25%	7%	24%	5.0–11.0°C
December	0%	21%	5%	19%	-1.8–3.6°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 88-year average. Warmest: 1931. Coolest: 1917.2023

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5013285
NOAA station: USC00205662 · CENTRAL MICHIGAN UNIV
Station distance: 19.4 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 18 usable years
Daylight: Calculated from latitude 43.64°, 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 CENTRAL MICHIGAN UNIV is what differs

Mount Pleasant→Clare→Shepherd→Weidman→Farwell→Rosebush→

Or put two places side by side: Lake Isabella vs Mount Pleasant

Best time to visitLake Isabella.

September

July

September

The whole year,without the guesswork.

Lake Isabella runs +0.6°Con the 1961–1990 baseline.

Nearby, measured,and named.

Best time to visit
Lake Isabella.

The whole year,
without the guesswork.

Lake Isabella runs +0.6°C
on the 1961–1990 baseline.

Nearby, measured,
and named.