United States · 1991–2020

Best time to visit
Henderson.

August leads for comfortable weather in Henderson: typically 26.7°C by day, 14.5°C at night, with 83 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortAugust

Typical high26.7°C

Typical low14.5°C

Rain in August83 mm

Comfort

August

August · September · June

79climate match

Beach

July

July · August · June

67climate match

Outdoors

September

September · May · June

76climate match

The weakest month is January, scoring 5 against August’s 79 — days reach only -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° / -9.2°

Feb

50.6° / -8.9°

Mar

56.3° / -4.5°

Apr

2713.7° / 1.1°

May

5720.4° / 7.4°

Jun

7825.7° / 13°

Jul

7727.7° / 15.1°

Aug

7926.7° / 14.5°

Sep

7923.1° / 10.5°

Oct

4115.9° / 4.5°

Nov

128.5° / -0.6°

Dec

52° / -5.2°

Monthly climate evidence for Henderson — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	-1°C	-9.2°C	52 mm	8.4	9 h 19	5	Strong coverage
February	0.6°C	-8.9°C	45 mm	7	10 h 27	5	Strong coverage
March	6.3°C	-4.5°C	49 mm	6.9	11 h 47	5	Strong coverage
April	13.7°C	1.1°C	92 mm	9.8	13 h 20	27	Strong coverage
May	20.4°C	7.4°C	111 mm	11	14 h 38	57	Strong coverage
June	25.7°C	13°C	90 mm	8.7	15 h 21	78	Strong coverage
July	27.7°C	15.1°C	83 mm	7.4	15 h 04	77	Strong coverage
August	26.7°C	14.5°C	83 mm	7.9	13 h 56	79	Strong coverage
September	23.1°C	10.5°C	73 mm	8.6	12 h 26	79	Strong coverage
October	15.9°C	4.5°C	84 mm	9.9	10 h 57	41	Strong coverage
November	8.5°C	-0.6°C	61 mm	8.4	9 h 39	12	Strong coverage
December	2°C	-5.2°C	50 mm	8.6	9 h 01	5	Strong coverage

What has changed

Henderson runs +0.7°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

+1.2

Feb

+1.0

Mar

+1.1

Apr

-0.3

May

+0.3

Jun

+0.3

Jul

+0.3

Aug

+0.4

Sep

+1.4

Oct

+0.9

Nov

+0.4

Dec

+1.8

August daytime highs, 2011–2025. Last recorded: 26.6°C.

Records at OWOSSO WWTP, 1896–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	18.3°C26 Jan 1950	-30.0°C23 Jan 1907	80 mm27 Jan 1967	109 mm1897 · driest 1 mm in 1994	126
February	23.3°C28 Feb 2024	-32.2°C5 Feb 1918	64 mm13 Feb 1938	132 mm1938 · driest 1 mm in 1987	123
March	30.6°C22 Mar 2012	-26.1°C4 Mar 2014	52 mm19 Mar 1948	128 mm1942 · driest 0 mm in 1995	128
April	31.1°C19 Apr 2002	-16.1°C7 Apr 1982	59 mm28 Apr 2011	224 mm2013 · driest 6 mm in 1995	127
May	35.0°C27 May 1911	-6.7°C2 May 1909	82 mm19 May 2011	269 mm2011 · driest 2 mm in 1977	126
June	38.9°C1 Jun 1934	-0.6°C8 Jun 1913	114 mm6 Jun 1905	190 mm1943 · driest 9 mm in 1904	126
July	40.6°C24 Jul 1934	4.4°C18 Jul 1906	108 mm28 Jul 2011	281 mm1902 · driest 0 mm in 1921	129
August	39.4°C6 Aug 1918	1.1°C29 Aug 1934	106 mm28 Aug 2020	252 mm1975 · driest 4 mm in 1899	127
September	39.4°C8 Sep 1933	-3.3°C28 Sep 1991	85 mm4 Sep 1932	261 mm1986 · driest 0 mm in 1979	125
October	32.2°C3 Oct 1953	-9.4°C31 Oct 1906	119 mm1 Oct 1981	167 mm2017 · driest 9 mm in 1924	127
November	26.1°C1 Nov 1950	-20.6°C26 Nov 1949	61 mm18 Nov 1963	165 mm2003 · driest 6 mm in 1930	126
December	20.6°C6 Dec 2001	-25.6°C26 Dec 1914	46 mm31 Dec 1984	113 mm2008 · driest 0 mm in 1904	128

Typical days per month at OWOSSO WWTP, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	29	2	9
February	0	0	26	1	7
March	<1	0	25	1	3
April	1	<1	14	3	<1
May	7	2	1	3	0
June	18	5	0	3	0
July	25	8	0	3	0
August	22	6	0	2	0
September	12	3	<1	3	0
October	3	<1	6	3	<1
November	<1	0	18	2	2
December	0	0	27	1	7

The best month has moved. On the 1961–1990 numbers the strongest month here was June (scoring 83); on 2011–2025 it is September (89). Both are scored the same way, from the same station — only the climate underneath changed.

How often, not how much — every day in OWOSSO 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%	5%	24%	-4.1–2.6°C
February	0%	23%	4%	21%	-3.4–3.5°C
March	4%	24%	6%	27%	3.0–9.8°C
April	16%	30%	8%	37%	11.4–16.6°C
May	43%	30%	10%	35%	18.1–23.7°C
June	68%	27%	9%	29%	24.0–28.5°C
July	77%	22%	8%	20%	26.8–31.0°C
August	75%	24%	8%	23%	25.3–29.4°C
September	59%	26%	9%	28%	21.1–25.9°C
October	26%	26%	7%	28%	14.0–19.5°C
November	3%	27%	6%	31%	5.8–11.1°C
December	0%	26%	5%	27%	-1.2–4.6°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 103-year average. Warmest: 1921. Coolest: 1917.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4995786
NOAA station: USC00206300 · OWOSSO WWTP
Station distance: 7.9 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 27 usable years
Daylight: Calculated from latitude 43.09°, 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 OWOSSO WWTP is what differs

Owosso→New Haven→Chesaning→Perry→Laingsburg→Middletown→

Or put two places side by side: Henderson vs Owosso

Best time to visitHenderson.

August

July

September

The whole year,without the guesswork.

Henderson runs +0.7°Con the 1961–1990 baseline.

Nearby, measured,and named.

Best time to visit
Henderson.

The whole year,
without the guesswork.

Henderson runs +0.7°C
on the 1961–1990 baseline.

Nearby, measured,
and named.