United States · 1991–2020

Best time to visit
Fort Madison.

September leads for comfortable weather in Fort Madison: typically 25.3°C by day, 14.4°C at night, with 89 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high25.3°C

Typical low14.4°C

Rain in September89 mm

Comfort

September

September · May · June

84climate match

Beach

August

August · July · June

79climate match

Outdoors

October

October · April · September

78climate match

The weakest month is January, scoring 5 against September’s 84 — days reach only 0.7°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

50.7° / -8°

Feb

53.3° / -5.8°

Mar

1910.2° / 0.2°

Apr

4617° / 6.3°

May

7122.6° / 12.5°

Jun

6427.8° / 17.9°

Jul

5829.7° / 20.1°

Aug

6429° / 19.1°

Sep

8425.3° / 14.4°

Oct

5818.1° / 7.8°

Nov

2210° / 0.9°

Dec

53.4° / -4.8°

Monthly climate evidence for Fort Madison — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	0.7°C	-8°C	43 mm	6.2	9 h 34	5	Strong coverage
February	3.3°C	-5.8°C	49 mm	5.7	10 h 35	5	Strong coverage
March	10.2°C	0.2°C	70 mm	7.4	11 h 49	19	Strong coverage
April	17°C	6.3°C	103 mm	9.7	13 h 14	46	Strong coverage
May	22.6°C	12.5°C	133 mm	10.5	14 h 25	71	Strong coverage
June	27.8°C	17.9°C	129 mm	8.9	15 h 04	64	Strong coverage
July	29.7°C	20.1°C	103 mm	7.6	14 h 49	58	Strong coverage
August	29°C	19.1°C	96 mm	7.1	13 h 47	64	Strong coverage
September	25.3°C	14.4°C	89 mm	6	12 h 25	84	Strong coverage
October	18.1°C	7.8°C	78 mm	7	11 h 03	58	Strong coverage
November	10°C	0.9°C	62 mm	6.2	9 h 52	22	Strong coverage
December	3.4°C	-4.8°C	51 mm	6.2	9 h 17	5	Strong coverage

What has changed

Fort Madison runs +0.2°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

+0.5

Feb

-0.2

Mar

+1.0

Apr

-0.9

May

-0.4

Jun

+0.3

Jul

-0.8

Aug

-0.2

Sep

+0.9

Oct

-0.2

Nov

-0.3

Dec

+2.1

September daytime highs, 2011–2025. Last recorded: 27.8°C.

Records at FT MADISON, 1893–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	19.4°C22 Jan 1957	-30.6°C10 Jan 1982	57 mm20 Jan 1904	145 mm1965 · driest 0 mm in 1981	79
February	22.8°C27 Feb 2026	-29.4°C9 Feb 1979	57 mm20 Feb 2014	123 mm1997 · driest 1 mm in 2026	79
March	31.1°C26 Mar 2026	-23.9°C1 Mar 1962	86 mm4 Mar 1985	156 mm1985 · driest 0 mm in 1978	77
April	33.9°C30 Apr 1895	-11.7°C6 Apr 1982	76 mm2 Apr 1983	225 mm1954 · driest 14 mm in 1985	77
May	35.0°C10 May 1895	-5.6°C11 May 1966	103 mm27 May 1996	311 mm1996 · driest 15 mm in 1964	77
June	40.0°C25 Jun 1988	5.0°C2 Jun 1956	124 mm24 Jun 1993	278 mm2010 · driest 2 mm in 1963	77
July	41.7°C26 Jul 1916	8.3°C30 Jul 1971	103 mm19 Jul 1961	327 mm1993 · driest 1 mm in 2026	82
August	40.0°C18 Aug 1983	5.6°C13 Aug 1977	216 mm6 Aug 1959	357 mm1970 · driest 0 mm in 2013	78
September	37.8°C2 Sep 2000	-0.6°C26 Sep 1984	110 mm13 Sep 1961	456 mm1970 · driest 8 mm in 2017	78
October	33.3°C2 Oct 1953	-9.4°C19 Oct 1972	84 mm13 Oct 1969	222 mm1969 · driest 1 mm in 1964	79
November	27.2°C1 Nov 1968	-20.6°C30 Nov 1964	79 mm27 Nov 1990	213 mm1985 · driest 3 mm in 1955	78
December	21.1°C4 Dec 1970	-28.3°C19 Dec 1983	76 mm2 Dec 1982	159 mm1982 · driest 3 mm in 1954	79

Typical days per month at FT MADISON, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	28	1	4
February	0	0	23	2	3
March	<1	0	16	2	1
April	2	<1	3	4	<1
May	11	2	0	4	0
June	24	10	0	4	0
July	29	15	0	3	0
August	28	13	0	3	0
September	17	5	0	3	0
October	4	<1	2	2	<1
November	0	0	13	2	<1
December	0	0	25	2	3

The best month has moved. On the 1961–1990 numbers the strongest month here was May (scoring 80); on 2011–2025 it is September (88). Both are scored the same way, from the same station — only the climate underneath changed.

How often, not how much — every day in FT MADISON’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%	17%	4%	12%	-3.2–4.0°C
February	<1%	17%	5%	12%	-1.4–7.2°C
March	6%	22%	7%	23%	6.9–12.6°C
April	26%	30%	11%	35%	14.5–20.3°C
May	52%	31%	12%	37%	20.3–26.1°C
June	71%	28%	13%	30%	26.1–30.0°C
July	75%	25%	11%	23%	27.7–32.8°C
August	77%	23%	10%	20%	27.2–30.9°C
September	71%	22%	11%	21%	23.5–27.8°C
October	37%	20%	8%	20%	16.4–21.1°C
November	7%	18%	7%	15%	6.5–13.2°C
December	<1%	19%	5%	14%	0.5–6.4°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.

1953Each stripe is one year’s mean temperature against the 66-year average. Warmest: 2012. Coolest: 1978.2023

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4857507
NOAA station: USC00133007 · FT MADISON
Station distance: 1.8 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 29 usable years
Daylight: Calculated from latitude 40.63°, 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 FT MADISON is what differs

Nauvoo→Dallas City→Montrose→Denmark→Pontoosuc→Aztec Mobile Home Park→

Or put two places side by side: Fort Madison vs Nauvoo

Best time to visitFort Madison.

September

August

October

The whole year,without the guesswork.

Fort Madison runs +0.2°Con the 1961–1990 baseline.

Nearby, measured,and named.

Best time to visit
Fort Madison.

The whole year,
without the guesswork.

Fort Madison runs +0.2°C
on the 1961–1990 baseline.

Nearby, measured,
and named.