United States · 1991–2020

Best time to visit
Henderson.

May leads for comfortable weather in Henderson: typically 23.6°C by day, 12.2°C at night, with 101 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortMay

Typical high23.6°C

Typical low12.2°C

Rain in May101 mm

Comfort

May

May · September · June

79climate match

Beach

July

July · August · June

80climate match

Outdoors

October

October · May · April

81climate match

The weakest month is January, scoring 5 against May’s 79 — days reach only 2.1°C, 22° 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

52.1° / -6.7°

Feb

55.5° / -4.2°

Mar

2411.6° / 0.6°

Apr

4618.3° / 6.2°

May

7923.6° / 12.2°

Jun

6828.5° / 17.4°

Jul

6330.2° / 19°

Aug

6829.6° / 17.6°

Sep

7925.9° / 12.8°

Oct

6119.6° / 6.7°

Nov

2411.8° / 1.4°

Dec

54.7° / -3.7°

Monthly climate evidence for Henderson — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	2.1°C	-6.7°C	61 mm	6.2	9 h 42	5	Good coverage
February	5.5°C	-4.2°C	53 mm	5.5	10 h 40	5	Good coverage
March	11.6°C	0.6°C	70 mm	7.3	11 h 50	24	Good coverage
April	18.3°C	6.2°C	127 mm	9.6	13 h 10	46	Good coverage
May	23.6°C	12.2°C	101 mm	9.3	14 h 18	79	Good coverage
June	28.5°C	17.4°C	95 mm	7.6	14 h 54	68	Good coverage
July	30.2°C	19°C	78 mm	6.6	14 h 40	63	Good coverage
August	29.6°C	17.6°C	74 mm	6.3	13 h 42	68	Good coverage
September	25.9°C	12.8°C	89 mm	6.5	12 h 24	79	Good coverage
October	19.6°C	6.7°C	78 mm	6.8	11 h 06	61	Good coverage
November	11.8°C	1.4°C	87 mm	7.1	9 h 59	24	Good coverage
December	4.7°C	-3.7°C	53 mm	5.9	9 h 26	5	Good coverage

Records at CARLINVILLE, 1893–2022
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	23.3°C23 Jan 1909	-30.0°C7 Jan 1912	74 mm10 Jan 1975	185 mm2005 · driest 2 mm in 1986	117
February	27.8°C24 Feb 1930	-30.6°C13 Feb 1905	72 mm6 Feb 2008	160 mm2008 · driest 3 mm in 1947	117
March	32.8°C21 Mar 1907	-24.4°C6 Mar 1960	101 mm14 Mar 1922	222 mm1922 · driest 4 mm in 1910	117
April	33.3°C10 Apr 1930	-8.9°C5 Apr 1920	105 mm11 Apr 1979	291 mm1994 · driest 28 mm in 1986	117
May	37.2°C30 May 1934	-3.3°C10 May 1966	95 mm21 May 2013	277 mm1943 · driest 3 mm in 1934	120
June	41.1°C28 Jun 1934	2.8°C16 Jun 1917	134 mm28 Jun 1957	276 mm1945 · driest 3 mm in 1933	118
July	45.0°C24 Jul 1934	6.7°C23 Jul 1947	158 mm8 Jul 1942	294 mm1942 · driest 0 mm in 2012	119
August	43.3°C4 Aug 1918	3.3°C21 Aug 1950	127 mm20 Aug 1915	282 mm1915 · driest 1 mm in 1971	117
September	40.6°C3 Sep 1913	-3.9°C30 Sep 1899	101 mm19 Sep 1966	312 mm1926 · driest 0 mm in 1897	117
October	35.0°C2 Oct 1953	-10.0°C30 Oct 1925	122 mm12 Oct 1969	281 mm2009 · driest 0 mm in 2021	117
November	28.9°C1 Nov 1950	-20.0°C30 Nov 1929	104 mm1 Nov 1946	227 mm1985 · driest 2 mm in 1904	118
December	23.3°C15 Dec 1948	-28.9°C22 Dec 1989	95 mm3 Dec 1982	200 mm1990 · driest 3 mm in 1955	117

Typical days per month at CARLINVILLE, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	27	2	4
February	0	0	22	2	2
March	2	0	16	2	1
April	5	<1	4	5	<1
May	14	3	<1	3	0
June	24	12	0	3	0
July	29	17	0	3	0
August	28	15	0	3	0
September	19	6	<1	3	0
October	7	1	4	3	0
November	<1	0	13	3	<1
December	0	0	24	2	1

How often, not how much — every day in CARLINVILLE’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%	20%	5%	20%	-0.6–6.8°C
February	2%	21%	7%	21%	1.4–9.1°C
March	12%	27%	9%	32%	8.1–15.7°C
April	32%	32%	12%	39%	16.2–21.7°C
May	59%	30%	12%	35%	21.9–27.0°C
June	72%	28%	12%	31%	27.0–31.8°C
July	78%	22%	9%	20%	29.4–34.4°C
August	79%	21%	9%	18%	28.5–33.4°C
September	72%	23%	10%	24%	24.5–29.8°C
October	48%	22%	8%	22%	17.9–23.5°C
November	11%	23%	8%	22%	9.2–14.9°C
December	<1%	22%	6%	21%	1.8–8.4°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.

1893Each stripe is one year’s mean temperature against the 107-year average. Warmest: 1931. Coolest: 1917.2013

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4240496
NOAA station: USC00111280 · CARLINVILLE
Station distance: 16 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 18 usable years
Daylight: Calculated from latitude 39.16°, 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 CARLINVILLE is what differs

Carlinville→Gillespie→Benld→Palmyra→Shipman→Wilsonville→

Or put two places side by side: Henderson vs Carlinville

Best time to visitHenderson.

May

July

October

The whole year,without the guesswork.

Nearby, measured,and named.

Best time to visit
Henderson.

The whole year,
without the guesswork.

Nearby, measured,
and named.