United States · 1991–2020

Best time to visit
Clifton.

September leads for comfortable weather in Clifton: typically 25.5°C by day, 12.4°C at night, with 77 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high25.5°C

Typical low12.4°C

Rain in September77 mm

Comfort

September

September · August · May

81climate match

Beach

August

August · July · June

74climate match

Outdoors

October

October · May · September

75climate match

The weakest month is January, scoring 5 against September’s 81 — days reach only 0.5°C, 23° 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

50.5° / -9°

Feb

52.7° / -7.2°

Mar

149.2° / -1.8°

Apr

4016.1° / 3.6°

May

6922.6° / 10.2°

Jun

6827.7° / 15.7°

Jul

6229.3° / 17.9°

Aug

7228.5° / 16.8°

Sep

8125.5° / 12.4°

Oct

5518.4° / 5.8°

Nov

1810° / -0.3°

Dec

53.4° / -5.8°

Monthly climate evidence for Clifton — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	0.5°C	-9°C	53 mm	7.5	9 h 32	5	Strong coverage
February	2.7°C	-7.2°C	49 mm	6.3	10 h 34	5	Strong coverage
March	9.2°C	-1.8°C	58 mm	7.1	11 h 49	14	Strong coverage
April	16.1°C	3.6°C	93 mm	8.8	13 h 14	40	Strong coverage
May	22.6°C	10.2°C	122 mm	9.6	14 h 27	69	Strong coverage
June	27.7°C	15.7°C	130 mm	8.3	15 h 06	68	Strong coverage
July	29.3°C	17.9°C	115 mm	7.4	14 h 50	62	Strong coverage
August	28.5°C	16.8°C	84 mm	7	13 h 48	72	Strong coverage
September	25.5°C	12.4°C	77 mm	6.5	12 h 25	81	Strong coverage
October	18.4°C	5.8°C	79 mm	7.8	11 h 02	55	Strong coverage
November	10°C	-0.3°C	66 mm	7.1	9 h 50	18	Strong coverage
December	3.4°C	-5.8°C	51 mm	6.5	9 h 15	5	Strong coverage

What has changed

Clifton 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

+1.1

Feb

+1.0

Mar

+1.1

Apr

-0.2

May

+0.3

Jun

0.0

Jul

-0.9

Aug

-0.3

Sep

+0.6

Oct

+0.8

Nov

-0.3

Dec

+2.4

September daytime highs, 2011–2025. Last recorded: 26.8°C.

Records at KANKAKEE WWTP, 1973–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	18.9°C8 Jan 2008	-33.9°C20 Jan 1985	71 mm8 Jan 2008	119 mm1999 · driest 1 mm in 2022	51
February	23.3°C26 Feb 2000	-29.4°C5 Feb 1979	49 mm25 Feb 2001	129 mm1997 · driest 0 mm in 1987	52
March	29.4°C22 Mar 2012	-21.7°C4 Mar 2002	76 mm9 Mar 2009	148 mm2009 · driest 14 mm in 2011	54
April	32.8°C27 Apr 1986	-13.3°C7 Apr 1982	118 mm19 Apr 1975	199 mm1975 · driest 7 mm in 2012	54
May	37.2°C28 May 2018	-2.8°C7 May 1989	100 mm25 May 2006	243 mm2006 · driest 17 mm in 1992	54
June	39.4°C26 Jun 1988	3.3°C1 Jun 2003	149 mm17 Jun 2012	291 mm2010 · driest 1 mm in 1991	53
July	39.4°C25 Jul 1987	7.8°C2 Jul 2001	111 mm10 Jul 2000	329 mm2003 · driest 17 mm in 2022	53
August	41.7°C17 Aug 1988	3.9°C28 Aug 1986	84 mm31 Aug 1980	228 mm2004 · driest 18 mm in 1984	53
September	37.2°C6 Sep 1998	-1.1°C27 Sep 1991	87 mm1 Sep 1989	273 mm1977 · driest 0 mm in 1979	51
October	32.2°C4 Oct 2025	-7.8°C24 Oct 1981	78 mm25 Oct 2021	208 mm2009 · driest 15 mm in 1992	53
November	26.1°C2 Nov 2016	-17.2°C26 Nov 1977	85 mm28 Nov 1990	234 mm1985 · driest 1 mm in 2021	53
December	21.7°C4 Dec 2012	-32.2°C24 Dec 1983	93 mm3 Dec 1982	157 mm1982 · driest 0 mm in 2009	52

Typical days per month at KANKAKEE WWTP, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	28	1	5
February	0	0	24	1	4
March	<1	0	20	2	2
April	3	<1	6	3	<1
May	12	4	<1	4	0
June	23	10	0	4	0
July	28	14	0	4	0
August	27	11	0	2	0
September	17	6	<1	2	0
October	6	<1	4	3	0
November	<1	0	15	2	<1
December	0	0	25	1	3

How often, not how much — every day in KANKAKEE 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%	24%	5%	22%	-4.0–3.4°C
February	<1%	21%	5%	18%	-3.3–6.4°C
March	7%	25%	8%	30%	5.8–12.5°C
April	20%	31%	10%	38%	13.3–18.5°C
May	49%	30%	12%	37%	19.6–25.8°C
June	70%	27%	12%	28%	26.4–29.7°C
July	76%	24%	12%	22%	27.8–31.8°C
August	77%	22%	9%	20%	26.9–30.5°C
September	70%	21%	8%	18%	23.5–27.2°C
October	31%	23%	8%	22%	16.4–20.4°C
November	6%	24%	8%	22%	6.6–13.0°C
December	<1%	23%	6%	23%	-1.0–6.5°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.

1974Each stripe is one year’s mean temperature against the 46-year average. Warmest: 2012. Coolest: 1979.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4888208
NOAA station: USC00114603 · KANKAKEE WWTP
Station distance: 22.6 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 27 usable years
Daylight: Calculated from latitude 40.94°, 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 KANKAKEE WWTP is what differs

Kankakee→Bourbonnais→Bradley→Manteno→Momence→Limestone→

Or put two places side by side: Clifton vs Kankakee

Best time to visitClifton.