United States · 1991–2020

Best time to visit
Coal Valley.

September leads for comfortable weather in Coal Valley: typically 25.2°C by day, 12.3°C at night, with 84 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high25.2°C

Typical low12.3°C

Rain in September84 mm

Comfort

September

September · May · August

81climate match

Beach

July

July · August · June

73climate match

Outdoors

October

October · May · September

76climate match

The weakest month is January, scoring 5 against September’s 81 — days reach only -0.4°C, 24° 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

5-0.4° / -9.6°

Feb

52.3° / -7.3°

Mar

149.7° / -1.4°

Apr

4417° / 4.3°

May

7123° / 10.6°

Jun

6528.2° / 16.1°

Jul

6129.8° / 18.3°

Aug

6728.7° / 17°

Sep

8125.2° / 12.3°

Oct

5517.9° / 5.8°

Nov

189.6° / -0.6°

Dec

52.5° / -6.2°

Monthly climate evidence for Coal Valley — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	-0.4°C	-9.6°C	42 mm	6.7	9 h 29	5	Strong coverage
February	2.3°C	-7.3°C	46 mm	6.3	10 h 32	5	Strong coverage
March	9.7°C	-1.4°C	67 mm	7.9	11 h 48	14	Strong coverage
April	17°C	4.3°C	97 mm	8.9	13 h 16	44	Strong coverage
May	23°C	10.6°C	119 mm	9.9	14 h 29	71	Strong coverage
June	28.2°C	16.1°C	127 mm	9.6	15 h 09	65	Strong coverage
July	29.8°C	18.3°C	107 mm	7.1	14 h 53	61	Strong coverage
August	28.7°C	17°C	101 mm	7.7	13 h 50	67	Strong coverage
September	25.2°C	12.3°C	84 mm	6.7	12 h 25	81	Strong coverage
October	17.9°C	5.8°C	71 mm	6.6	11 h 01	55	Strong coverage
November	9.6°C	-0.6°C	58 mm	6.2	9 h 48	18	Strong coverage
December	2.5°C	-6.2°C	52 mm	6.5	9 h 12	5	Strong coverage

What has changed

Coal Valley runs +1.4°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

+2.1

Feb

+1.7

Mar

+2.3

Apr

+0.6

May

+1.0

Jun

+0.9

Jul

+0.1

Aug

+0.4

Sep

+1.9

Oct

+0.8

Nov

+1.1

Dec

+3.4

September daytime highs, 2011–2025. Last recorded: 27.6°C.

Records at MOLINE QUAD CITY INTL AP, 1943–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	20.6°C31 Jan 1989	-36.0°C31 Jan 2019	43 mm3 Jan 1971	111 mm1974 · driest 8 mm in 1956	83
February	26.1°C27 Feb 2024	-33.3°C3 Feb 1996	45 mm27 Feb 1948	95 mm2019 · driest 0 mm in 2026	83
March	31.1°C29 Mar 1986	-28.3°C6 Mar 1960	55 mm22 Mar 1993	189 mm1973 · driest 8 mm in 1958	83
April	33.9°C25 Apr 1986	-13.9°C7 Apr 1982	108 mm21 Apr 1973	287 mm1973 · driest 18 mm in 1946	83
May	37.2°C28 May 2018	-3.9°C3 May 2005	89 mm20 May 2025	290 mm1974 · driest 8 mm in 1992	83
June	40.0°C25 Jun 1988	3.9°C1 Jun 1993	130 mm30 Jun 2014	336 mm1993 · driest 26 mm in 1963	84
July	40.0°C7 Jul 2012	7.8°C30 Jul 1971	129 mm10 Jul 1971	299 mm1992 · driest 11 mm in 1991	84
August	39.4°C17 Aug 1988	4.4°C28 Aug 1986	117 mm29 Aug 1951	387 mm1987 · driest 4 mm in 2020	83
September	37.2°C29 Sep 1953	-1.1°C24 Sep 1989	158 mm13 Sep 1961	360 mm1970 · driest 1 mm in 1979	83
October	35.0°C3 Oct 2006	-8.9°C30 Oct 1988	121 mm10 Oct 1954	217 mm1985 · driest 0 mm in 1964	83
November	26.7°C1 Nov 2000	-22.8°C29 Nov 1976	54 mm17 Nov 2015	172 mm1992 · driest 7 mm in 2002	83
December	23.9°C15 Dec 2021	-31.1°C23 Dec 1989	79 mm2 Dec 1982	127 mm1982 · driest 9 mm in 1976	83

Typical days per month at MOLINE QUAD CITY INTL AP, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	29	1	7
February	0	0	25	1	6
March	<1	0	20	2	3
April	4	<1	6	3	<1
May	13	3	<1	4	0
June	24	12	0	4	0
July	29	16	0	4	0
August	28	12	0	4	0
September	17	6	<1	3	0
October	5	<1	5	2	<1
November	<1	0	17	2	2
December	0	0	27	2	6

How often, not how much — every day in MOLINE QUAD CITY INTL AP’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%	-4.5–2.7°C
February	<1%	21%	4%	20%	-2.6–6.3°C
March	7%	27%	7%	31%	4.9–12.9°C
April	24%	30%	11%	37%	13.7–19.5°C
May	51%	31%	12%	37%	19.8–25.6°C
June	68%	29%	13%	34%	25.6–30.3°C
July	76%	24%	11%	24%	28.2–32.0°C
August	76%	24%	10%	24%	26.7–30.4°C
September	67%	22%	9%	23%	23.0–27.5°C
October	34%	21%	7%	21%	15.9–21.0°C
November	6%	21%	6%	19%	5.7–12.2°C
December	<1%	22%	5%	21%	-1.9–5.4°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.

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 4888296
NOAA station: USW00014923 · MOLINE QUAD CITY INTL AP
Station distance: 5.7 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 30 usable years
Daylight: Calculated from latitude 41.43°, 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 MOLINE QUAD CITY INTL AP is what differs

East Moline→Milan→Orion→Coyne Center→Sherrard→Oak Grove→

Or put two places side by side: Coal Valley vs East Moline

Best time to visitCoal Valley.