United States · 1991–2020

Best time to visit
Effingham.

September leads for comfortable weather in Effingham: typically 27°C by day, 12.9°C at night, with 77 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high27°C

Typical low12.9°C

Rain in September77 mm

Comfort

September

September · May · August

77climate match

Beach

August

August · July · June

73climate match

Outdoors

October

October · April · September

79climate 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° / -6.6°

Feb

55.3° / -5.2°

Mar

2111.7° / 0.2°

Apr

4818.7° / 5.9°

May

7324.2° / 11.9°

Jun

6129.3° / 16.9°

Jul

5531° / 18.7°

Aug

6430.4° / 17.4°

Sep

7727° / 12.9°

Oct

6020.1° / 6.6°

Nov

2111.9° / 0.8°

Dec

55.3° / -3.9°

Monthly climate evidence for Effingham — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	2.7°C	-6.6°C	72 mm	7.2	9 h 42	5	Strong coverage
February	5.3°C	-5.2°C	63 mm	6.7	10 h 40	5	Strong coverage
March	11.7°C	0.2°C	80 mm	8.5	11 h 50	21	Strong coverage
April	18.7°C	5.9°C	121 mm	9.9	13 h 10	48	Strong coverage
May	24.2°C	11.9°C	134 mm	10.3	14 h 17	73	Strong coverage
June	29.3°C	16.9°C	127 mm	9	14 h 54	61	Strong coverage
July	31°C	18.7°C	112 mm	7.8	14 h 40	55	Strong coverage
August	30.4°C	17.4°C	85 mm	6.4	13 h 42	64	Strong coverage
September	27°C	12.9°C	77 mm	6.2	12 h 24	77	Strong coverage
October	20.1°C	6.6°C	93 mm	6.9	11 h 06	60	Strong coverage
November	11.9°C	0.8°C	97 mm	8.1	9 h 59	21	Strong coverage
December	5.3°C	-3.9°C	75 mm	8.1	9 h 26	5	Strong coverage

What has changed

Effingham runs +0.9°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

+1.7

Feb

+1.1

Mar

+0.7

Apr

+0.4

May

+0.8

Jun

+0.7

Jul

+0.5

Aug

+0.4

Sep

+1.5

Oct

+0.9

Nov

-0.7

Dec

+2.2

September daytime highs, 2011–2019. Last recorded: 30.0°C.

Records at EFFINGHAM 3SW, 1893–2020
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	22.2°C25 Jan 1950	-33.9°C24 Jan 1915	97 mm3 Jan 1950	254 mm1950 · driest 1 mm in 1986	113
February	25.6°C29 Feb 1972	-28.3°C8 Feb 1895	71 mm11 Feb 2009	151 mm1990 · driest 6 mm in 1947	116
March	31.7°C24 Mar 1929	-23.9°C5 Mar 1978	84 mm14 Mar 1922	324 mm1898 · driest 4 mm in 1915	113
April	32.8°C11 Apr 1930	-6.1°C6 Apr 1982	83 mm28 Apr 2016	243 mm1994 · driest 23 mm in 1900	115
May	36.7°C29 May 1895	-2.2°C7 May 1944	112 mm1 May 1946	328 mm1943 · driest 15 mm in 1913	115
June	41.1°C26 Jun 1954	1.7°C16 Jun 1917	145 mm7 Jun 2008	317 mm1957 · driest 9 mm in 1992	115
July	43.9°C15 Jul 1936	7.2°C23 Jul 1947	133 mm5 Jul 2000	296 mm2000 · driest 8 mm in 1921	114
August	43.3°C4 Aug 1918	3.9°C31 Aug 1915	144 mm13 Aug 1973	260 mm1915 · driest 1 mm in 1943	115
September	40.6°C4 Sep 1954	-4.4°C30 Sep 1899	133 mm29 Sep 1955	346 mm1911 · driest 4 mm in 2004	114
October	35.0°C3 Oct 1922	-9.4°C29 Oct 1952	113 mm9 Oct 2009	279 mm2009 · driest 2 mm in 1896	114
November	28.9°C2 Nov 2016	-21.1°C25 Nov 1950	81 mm14 Nov 1993	263 mm1985 · driest 10 mm in 1976	112
December	23.3°C15 Dec 1948	-28.9°C21 Dec 1989	90 mm27 Dec 2015	251 mm1967 · driest 6 mm in 1958	115

Typical days per month at EFFINGHAM 3SW, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	27	2	3
February	0	0	23	2	3
March	1	0	17	3	1
April	6	<1	4	4	<1
May	15	5	<1	5	0
June	27	15	0	4	0
July	30	20	0	4	0
August	29	18	0	3	0
September	21	9	0	3	0
October	8	2	4	3	0
November	<1	0	15	3	<1
December	0	0	24	2	2

How often, not how much — every day in EFFINGHAM 3SW’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%	22%	7%	22%	-0.7–6.7°C
February	2%	23%	6%	23%	1.0–8.7°C
March	10%	28%	10%	32%	7.6–15.1°C
April	32%	31%	12%	39%	15.7–21.1°C
May	58%	31%	12%	37%	21.4–26.9°C
June	72%	28%	12%	31%	26.9–32.0°C
July	77%	23%	10%	22%	29.3–34.5°C
August	79%	21%	9%	20%	28.3–32.9°C
September	73%	21%	9%	19%	24.2–29.8°C
October	46%	21%	8%	21%	17.6–23.4°C
November	10%	25%	10%	26%	8.7–14.7°C
December	<1%	24%	8%	24%	1.4–8.2°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.

1897Each stripe is one year’s mean temperature against the 98-year average. Warmest: 1921. Coolest: 1979.2019

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4237727
NOAA station: USC00112687 · EFFINGHAM 3SW
Station distance: 7 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 25 usable years
Daylight: Calculated from latitude 39.12°, 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 EFFINGHAM 3SW is what differs

Altamont→Teutopolis→Watson→Beecher City→Edgewood→Mason→

Or put two places side by side: Effingham vs Altamont

Best time to visitEffingham.