United States · 1991–2020

Best time to visit
Effingham.

September leads for comfortable weather in Effingham: typically 26.8°C by day, 13.3°C at night, with 95 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high26.8°C

Typical low13.3°C

Rain in September95 mm

Comfort

September

September · May · June

76climate match

Beach

August

August · June · July

70climate match

Outdoors

October

October · April · September

81climate match

The weakest month is January, scoring 5 against September’s 76 — days reach only 3.4°C, 21° below the 24°C the score treats as ideal, and nights drop to -8.5°C.

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

53.4° / -8.5°

Feb

56.4° / -6.2°

Mar

3113.1° / -0.5°

Apr

5318.9° / 5.5°

May

7324.4° / 11.7°

Jun

6129.4° / 17.4°

Jul

4831.8° / 19.6°

Aug

5830.9° / 18.3°

Sep

7626.8° / 13.3°

Oct

6120.1° / 6°

Nov

2911.9° / -0.8°

Dec

55.4° / -6.1°

Monthly climate evidence for Effingham — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	3.4°C	-8.5°C	19 mm	3.6	9 h 40	5	Strong coverage
February	6.4°C	-6.2°C	33 mm	4	10 h 39	5	Strong coverage
March	13.1°C	-0.5°C	55 mm	5.8	11 h 49	31	Strong coverage
April	18.9°C	5.5°C	98 mm	8.1	13 h 11	53	Strong coverage
May	24.4°C	11.7°C	136 mm	9.5	14 h 19	73	Strong coverage
June	29.4°C	17.4°C	122 mm	8.4	14 h 57	61	Strong coverage
July	31.8°C	19.6°C	135 mm	7.7	14 h 42	48	Strong coverage
August	30.9°C	18.3°C	107 mm	7	13 h 43	58	Strong coverage
September	26.8°C	13.3°C	95 mm	6.4	12 h 24	76	Strong coverage
October	20.1°C	6°C	83 mm	6.1	11 h 05	61	Strong coverage
November	11.9°C	-0.8°C	45 mm	4.6	9 h 57	29	Strong coverage
December	5.4°C	-6.1°C	36 mm	3.6	9 h 23	5	Strong coverage

What has changed

Effingham runs -0.4°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

+0.3

Feb

-0.6

Mar

+0.3

Apr

-1.6

May

-1.5

Jun

-0.2

Jul

-1.5

Aug

-1.7

Sep

+0.2

Oct

-0.6

Nov

+0.3

Dec

+1.7

September daytime highs, 2011–2025. Last recorded: 24.9°C.

Records at HORTON, 1891–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	23.3°C29 Jan 2013	-36.1°C19 Jan 1892	43 mm31 Jan 2025	126 mm1949 · driest 0 mm in 1927	135
February	27.8°C24 Feb 1930	-32.2°C8 Feb 1971	59 mm21 Feb 1997	121 mm1911 · driest 0 mm in 1963	136
March	34.4°C25 Mar 1907	-27.8°C4 Mar 1978	66 mm11 Mar 1939	192 mm1973 · driest 0 mm in 1910	135
April	35.6°C20 Apr 1902	-16.1°C3 Apr 1975	84 mm9 Apr 1922	249 mm1999 · driest 12 mm in 1902	135
May	40.0°C31 May 1934	-3.3°C4 May 1907	119 mm20 May 1977	338 mm1903 · driest 14 mm in 1992	135
June	42.2°C19 Jun 1936	4.4°C7 Jun 1935	169 mm21 Jun 1951	428 mm1984 · driest 22 mm in 2023	134
July	43.9°C13 Jul 1934	6.7°C5 Jul 1972	122 mm30 Jul 2013	559 mm1993 · driest 3 mm in 2003	136
August	44.4°C13 Aug 1936	4.4°C21 Aug 1956	152 mm13 Aug 1900	351 mm1954 · driest 1 mm in 1894	135
September	42.8°C3 Sep 1947	-2.8°C27 Sep 1942	127 mm12 Sep 1977	347 mm1977 · driest 0 mm in 1908	135
October	35.6°C7 Oct 1939	-11.7°C28 Oct 1925	182 mm11 Oct 1973	237 mm1941 · driest 0 mm in 1952	135
November	28.9°C8 Nov 1980	-20.6°C28 Nov 1976	66 mm9 Nov 1977	173 mm1928 · driest 0 mm in 2007	135
December	23.3°C16 Dec 2021	-32.8°C24 Dec 1989	59 mm8 Dec 1980	98 mm1913 · driest 0 mm in 1929	135

Typical days per month at HORTON, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	27	<1	2
February	<1	0	23	1	2
March	2	<1	17	2	<1
April	5	<1	5	3	<1
May	14	4	<1	4	0
June	25	14	0	4	0
July	29	21	0	4	0
August	27	17	0	4	0
September	19	8	<1	3	0
October	7	1	4	2	<1
November	<1	0	17	1	<1
December	0	0	27	1	1

The best month has moved. On the 1961–1990 numbers the strongest month here was May (scoring 77); on 2011–2025 it is September (80). Both are scored the same way, from the same station — only the climate underneath changed.

How often, not how much — every day in HORTON’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%	12%	2%	6%	-1.2–6.5°C
February	3%	14%	3%	8%	0.7–10.7°C
March	17%	18%	6%	15%	8.2–16.4°C
April	38%	25%	10%	28%	15.9–21.8°C
May	58%	30%	13%	35%	21.7–27.0°C
June	70%	29%	14%	35%	26.5–31.8°C
July	77%	23%	10%	23%	29.9–34.2°C
August	77%	23%	10%	24%	28.9–33.9°C
September	73%	23%	11%	22%	24.4–29.5°C
October	51%	18%	7%	16%	17.7–23.3°C
November	12%	14%	4%	9%	9.0–14.7°C
December	<1%	12%	3%	7%	0.8–8.0°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 130-year average. Warmest: 1934. Coolest: 1951.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4270852
NOAA station: USC00143810 · HORTON
Station distance: 19.1 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 29 usable years
Daylight: Calculated from latitude 39.52°, 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 HORTON is what differs

Hiawatha→Horton→Everest→Fairview→Robinson→Kickapoo Tribal Center→

Or put two places side by side: Effingham vs Hiawatha

Best time to visitEffingham.

September

August

October

The whole year,without the guesswork.

Effingham runs -0.4°Con the 1961–1990 baseline.

Nearby, measured,and named.

Best time to visit
Effingham.

The whole year,
without the guesswork.

Effingham runs -0.4°C
on the 1961–1990 baseline.

Nearby, measured,
and named.