United States · 1991–2020

Best time to visit
Imlay City.

September leads for comfortable weather in Imlay City: typically 23.3°C by day, 10.2°C at night, with 68 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high23.3°C

Typical low10.2°C

Rain in September68 mm

Comfort

September

September · June · August

81climate match

Beach

July

July · August · June

67climate match

Outdoors

September

September · May · October

79climate match

The weakest month is January, scoring 5 against September’s 81 — days reach only -1.1°C, 25° 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

5-1.1° / -9.2°

Feb

50.5° / -9.1°

Mar

56.1° / -4.6°

Apr

2913.5° / 1.1°

May

6220.5° / 7.6°

Jun

8025.8° / 13.1°

Jul

7527.9° / 15.4°

Aug

7926.8° / 14.6°

Sep

8123.3° / 10.2°

Oct

4416° / 4.5°

Nov

118.2° / -0.8°

Dec

51.9° / -5.4°

Monthly climate evidence for Imlay City — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	-1.1°C	-9.2°C	55 mm	8.9	9 h 20	5	Strong coverage
February	0.5°C	-9.1°C	47 mm	7.1	10 h 27	5	Strong coverage
March	6.1°C	-4.6°C	49 mm	6.8	11 h 47	5	Strong coverage
April	13.5°C	1.1°C	78 mm	8.8	13 h 20	29	Strong coverage
May	20.5°C	7.6°C	87 mm	9.4	14 h 38	62	Strong coverage
June	25.8°C	13.1°C	76 mm	8	15 h 20	80	Strong coverage
July	27.9°C	15.4°C	90 mm	7.4	15 h 04	75	Strong coverage
August	26.8°C	14.6°C	79 mm	8	13 h 56	79	Strong coverage
September	23.3°C	10.2°C	68 mm	7.2	12 h 26	81	Strong coverage
October	16°C	4.5°C	75 mm	8.6	10 h 57	44	Strong coverage
November	8.2°C	-0.8°C	61 mm	8	9 h 39	11	Strong coverage
December	1.9°C	-5.4°C	48 mm	7.9	9 h 01	5	Strong coverage

What has changed

Imlay City runs +0.5°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

+0.4

Mar

+0.4

Apr

-0.9

May

+0.4

Jun

+0.4

Jul

+0.2

Aug

+0.3

Sep

+1.2

Oct

+0.5

Nov

+0.1

Dec

+1.8

September daytime highs, 2011–2025. Last recorded: 25.3°C.

Records at LAPEER WWTP, 1949–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	18.9°C25 Jan 1950	-32.2°C11 Jan 1984	39 mm11 Jan 2020	103 mm2024 · driest 3 mm in 1961	73
February	23.3°C28 Feb 2024	-31.1°C21 Feb 2015	70 mm16 Feb 1954	109 mm1954 · driest 1 mm in 1969	74
March	30.6°C22 Mar 2012	-27.2°C1 Mar 2014	40 mm26 Mar 2021	115 mm2016 · driest 6 mm in 1958	75
April	30.6°C16 Apr 2023	-15.6°C3 Apr 1965	65 mm10 Apr 2013	203 mm2013 · driest 17 mm in 1997	74
May	33.9°C29 May 2018	-5.0°C10 May 1966	67 mm21 May 1996	231 mm2004 · driest 10 mm in 1977	75
June	37.8°C26 Jun 1988	-0.6°C1 Jun 1966	75 mm18 Jun 1996	200 mm1962 · driest 15 mm in 1988	74
July	37.8°C16 Jul 1988	2.2°C6 Jul 1983	93 mm11 Jul 2024	264 mm2023 · driest 0 mm in 2001	75
August	37.2°C9 Aug 2001	-1.7°C30 Aug 1976	69 mm1 Aug 1979	195 mm1956 · driest 25 mm in 2002	74
September	36.7°C3 Sep 1953	-3.9°C17 Sep 1959	95 mm4 Sep 1981	249 mm1986 · driest 6 mm in 1998	73
October	31.7°C5 Oct 2025	-8.3°C24 Oct 1982	90 mm1 Oct 1981	170 mm1981 · driest 5 mm in 2005	72
November	26.7°C1 Nov 1950	-17.2°C24 Nov 1950	51 mm17 Nov 1952	143 mm2003 · driest 8 mm in 1976	74
December	20.6°C6 Dec 2001	-26.1°C28 Dec 2017	48 mm29 Dec 2025	111 mm1975 · driest 6 mm in 1960	75

Typical days per month at LAPEER WWTP, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	28	1	7
February	0	0	26	2	6
March	<1	0	25	2	3
April	1	0	14	3	<1
May	8	2	2	3	0
June	18	6	0	2	0
July	25	10	0	3	0
August	22	6	0	3	0
September	13	3	<1	3	0
October	2	<1	6	3	<1
November	<1	0	18	2	<1
December	0	0	27	1	5

The best month has moved. On the 1961–1990 numbers the strongest month here was June (scoring 80); on 2011–2025 it is September (90). Both are scored the same way, from the same station — only the climate underneath changed.

How often, not how much — every day in LAPEER WWTP’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%	25%	3%	26%	-4.1–1.9°C
February	0%	24%	4%	24%	-2.4–3.4°C
March	3%	24%	5%	27%	3.4–9.6°C
April	15%	30%	8%	36%	11.4–16.6°C
May	43%	28%	9%	33%	18.2–23.7°C
June	67%	28%	9%	29%	24.0–27.8°C
July	75%	24%	9%	25%	26.5–30.0°C
August	72%	26%	9%	26%	25.5–28.7°C
September	58%	25%	8%	28%	21.4–25.1°C
October	24%	27%	7%	29%	14.0–18.8°C
November	3%	27%	7%	31%	5.1–11.3°C
December	0%	26%	4%	28%	-1.4–4.7°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.

1950Each stripe is one year’s mean temperature against the 65-year average. Warmest: 2024. Coolest: 2014.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4996956
NOAA station: USC00204655 · LAPEER WWTP
Station distance: 19.1 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 26 usable years
Daylight: Calculated from latitude 43.02°, 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 LAPEER WWTP is what differs

Lapeer→Barnes Lake-Millers Lake→North Branch→Attica→Dryden→Metamora→

Or put two places side by side: Imlay City vs Lapeer

Best time to visitImlay City.

September

July

September

The whole year,without the guesswork.

Imlay City runs +0.5°Con the 1961–1990 baseline.

Nearby, measured,and named.

Best time to visit
Imlay City.

The whole year,
without the guesswork.

Imlay City runs +0.5°C
on the 1961–1990 baseline.

Nearby, measured,
and named.