United States · 1991–2020

Best time to visit
Marquette Heights.

September leads for comfortable weather in Marquette Heights: typically 25.5°C by day, 13.4°C at night, with 88 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high25.5°C

Typical low13.4°C

Rain in September88 mm

Comfort

September

September · May · June

82climate match

Beach

July

July · August · June

78climate match

Outdoors

October

October · April · September

76climate match

The weakest month is January, scoring 5 against September’s 82 — days reach only 0.6°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

50.6° / -8.1°

Feb

53.4° / -6°

Mar

1810.4° / -0.3°

Apr

4617.3° / 5.5°

May

7223.1° / 11.5°

Jun

7028.1° / 16.8°

Jul

6329.8° / 18.9°

Aug

6828.9° / 17.9°

Sep

8225.5° / 13.4°

Oct

5618.2° / 6.8°

Nov

2010.1° / 0.4°

Dec

53.3° / -4.9°

Monthly climate evidence for Marquette Heights — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	0.6°C	-8.1°C	52 mm	6.9	9 h 34	5	Strong coverage
February	3.4°C	-6°C	50 mm	6.3	10 h 35	5	Strong coverage
March	10.4°C	-0.3°C	68 mm	8.1	11 h 49	18	Strong coverage
April	17.3°C	5.5°C	101 mm	9.3	13 h 14	46	Strong coverage
May	23.1°C	11.5°C	119 mm	10.6	14 h 25	72	Strong coverage
June	28.1°C	16.8°C	95 mm	8.4	15 h 04	70	Strong coverage
July	29.8°C	18.9°C	90 mm	6.8	14 h 48	63	Strong coverage
August	28.9°C	17.9°C	84 mm	6.8	13 h 47	68	Strong coverage
September	25.5°C	13.4°C	88 mm	5.6	12 h 25	82	Strong coverage
October	18.2°C	6.8°C	80 mm	7.5	11 h 03	56	Strong coverage
November	10.1°C	0.4°C	68 mm	7	9 h 52	20	Strong coverage
December	3.3°C	-4.9°C	56 mm	6.6	9 h 17	5	Strong coverage

What has changed

Marquette Heights runs +1.6°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

+2.1

Feb

+2.0

Mar

+2.4

Apr

+0.6

May

+1.3

Jun

+1.2

Jul

+0.5

Aug

+0.9

Sep

+2.0

Oct

+1.2

Nov

+1.0

Dec

+3.5

September daytime highs, 2011–2025. Last recorded: 28.4°C.

Records at GENERAL WAYNE A DOWNING INTL A, 1943–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	21.1°C31 Jan 1989	-31.7°C17 Jan 1977	113 mm1 Jan 1965	206 mm1965 · driest 6 mm in 1986	83
February	25.6°C27 Feb 2024	-28.3°C3 Feb 1996	46 mm21 Feb 1997	136 mm1997 · driest 8 mm in 1947	83
March	30.6°C26 Mar 2026	-23.3°C6 Mar 1960	73 mm14 Mar 1944	190 mm2009 · driest 10 mm in 1958	83
April	33.3°C25 Apr 1986	-10.0°C6 Apr 1982	129 mm24 Apr 1950	220 mm1947 · driest 18 mm in 1971	83
May	36.1°C27 May 2018	-3.9°C10 May 1966	79 mm13 May 1957	265 mm2013 · driest 18 mm in 2005	84
June	40.6°C25 Jun 1988	3.9°C1 Jun 1993	112 mm2 Jun 1980	297 mm1974 · driest 15 mm in 1988	84
July	40.0°C23 Jul 2012	8.3°C27 Jul 1962	132 mm15 Jul 2020	258 mm1993 · driest 8 mm in 1988	84
August	39.4°C17 Aug 1988	5.0°C28 Aug 1986	110 mm29 Aug 1955	219 mm1965 · driest 6 mm in 1992	83
September	37.8°C1 Sep 2011	-1.7°C23 Sep 1995	104 mm13 Sep 1961	333 mm1961 · driest 1 mm in 1979	83
October	33.9°C3 Oct 2006	-7.2°C19 Oct 1972	101 mm24 Oct 2021	246 mm2021 · driest 1 mm in 1964	83
November	27.2°C1 Nov 1950	-18.9°C26 Nov 1977	108 mm27 Nov 1990	194 mm1985 · driest 6 mm in 1999	83
December	21.7°C2 Dec 1982	-30.6°C22 Dec 1989	64 mm24 Dec 1965	161 mm1949 · driest 8 mm in 1995	83

Typical days per month at GENERAL WAYNE A DOWNING INTL A, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	28	1	6
February	0	0	24	2	5
March	<1	0	17	3	2
April	4	<1	4	3	<1
May	13	3	<1	4	0
June	25	11	0	3	0
July	29	16	0	3	0
August	28	13	0	3	0
September	17	6	<1	3	0
October	5	<1	3	3	<1
November	<1	0	15	3	1
December	0	0	25	2	4

How often, not how much — every day in GENERAL WAYNE A DOWNING INTL A’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%	21%	4%	18%	-3.4–3.5°C
February	<1%	21%	4%	20%	-2.2–7.1°C
March	8%	27%	9%	31%	5.8–13.5°C
April	24%	31%	11%	38%	14.0–19.6°C
May	52%	30%	11%	38%	20.0–25.7°C
June	71%	27%	11%	30%	25.7–30.1°C
July	77%	23%	10%	23%	28.0–31.9°C
August	78%	21%	9%	20%	27.0–30.4°C
September	69%	21%	9%	20%	23.1–27.6°C
October	35%	21%	8%	21%	16.2–21.4°C
November	6%	22%	7%	23%	6.4–12.4°C
December	<1%	22%	6%	22%	-1.1–5.9°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.

1944Each stripe is one year’s mean temperature against the 82-year average. Warmest: 2024. Coolest: 1979.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4901260
NOAA station: USW00014842 · GENERAL WAYNE A DOWNING INTL A
Station distance: 9 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 30 usable years
Daylight: Calculated from latitude 40.62°, 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 GENERAL WAYNE A DOWNING INTL A is what differs

Peoria→North Peoria→Pekin→East Peoria→Bartonville→Peoria Heights→

Or put two places side by side: Marquette Heights vs Peoria

Best time to visitMarquette Heights.