United States · 1991–2020

Best time to visit
Zwingle.

August leads for comfortable weather in Zwingle: typically 26.5°C by day, 15.7°C at night, with 100 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortAugust

Typical high26.5°C

Typical low15.7°C

Rain in August100 mm

Comfort

August

August · September · June

78climate match

Beach

July

July · August · June

63climate match

Outdoors

May

May · September · October

75climate match

The weakest month is January, scoring 5 against August’s 78 — days reach only -3°C, 27° 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

5-3° / -11.5°

Feb

5-0.6° / -9.3°

Mar

56.8° / -3°

Apr

3114.3° / 3°

May

6220.7° / 9.3°

Jun

7425.8° / 14.9°

Jul

6927.5° / 16.8°

Aug

7826.5° / 15.7°

Sep

7622.8° / 11.1°

Oct

4415.5° / 4.5°

Nov

87.1° / -2.1°

Dec

5-0.1° / -8.1°

Monthly climate evidence for Zwingle — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	-3°C	-11.5°C	35 mm	6.5	9 h 24	5	Strong coverage
February	-0.6°C	-9.3°C	41 mm	6.2	10 h 30	5	Strong coverage
March	6.8°C	-3°C	58 mm	7.8	11 h 48	5	Strong coverage
April	14.3°C	3°C	104 mm	9.5	13 h 18	31	Strong coverage
May	20.7°C	9.3°C	110 mm	10.4	14 h 34	62	Strong coverage
June	25.8°C	14.9°C	132 mm	10.1	15 h 15	74	Strong coverage
July	27.5°C	16.8°C	122 mm	7.9	14 h 59	69	Strong coverage
August	26.5°C	15.7°C	100 mm	7.3	13 h 53	78	Strong coverage
September	22.8°C	11.1°C	97 mm	7.3	12 h 26	76	Strong coverage
October	15.5°C	4.5°C	74 mm	6.9	10 h 59	44	Strong coverage
November	7.1°C	-2.1°C	57 mm	6.3	9 h 43	8	Strong coverage
December	-0.1°C	-8.1°C	47 mm	6.7	9 h 06	5	Strong coverage

What has changed

Zwingle runs +0.9°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

+1.6

Feb

+0.5

Mar

+1.6

Apr

-0.2

May

+0.6

Jun

+0.8

Jul

0.0

Aug

+0.2

Sep

+1.6

Oct

+0.4

Nov

+0.8

Dec

+2.8

August daytime highs, 2011–2025. Last recorded: 26.4°C.

Records at DUBUQUE RGNL AP, 1951–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	15.6°C27 Jan 2002	-34.9°C31 Jan 2019	77 mm12 Jan 1960	153 mm1960 · driest 3 mm in 2025	74
February	22.2°C26 Feb 2024	-32.8°C5 Feb 1979	34 mm22 Feb 1981	97 mm2008 · driest 2 mm in 1995	75
March	29.4°C29 Mar 1986	-28.9°C1 Mar 1962	65 mm30 Mar 1998	165 mm1959 · driest 9 mm in 1958	75
April	33.9°C22 Apr 1980	-11.7°C11 Apr 1973	70 mm13 Apr 2014	222 mm2026 · driest 21 mm in 1985	75
May	35.0°C27 May 2018	-6.1°C3 May 2005	111 mm6 May 1960	240 mm1962 · driest 18 mm in 1992	75
June	37.8°C20 Jun 1988	2.2°C11 Jun 1972	98 mm13 Jun 2000	319 mm2014 · driest 18 mm in 1988	75
July	38.3°C25 Jul 2012	6.7°C30 Jul 1971	190 mm27 Jul 2011	407 mm2011 · driest 12 mm in 2012	75
August	37.8°C1 Aug 1988	4.4°C28 Aug 1986	152 mm21 Aug 2002	252 mm1987 · driest 2 mm in 1969	74
September	36.1°C9 Sep 1955	-2.2°C29 Sep 1984	225 mm14 Sep 1967	393 mm1965 · driest 2 mm in 1979	75
October	32.2°C3 Oct 1997	-10.6°C29 Oct 1952	66 mm23 Oct 1959	218 mm1967 · driest 0 mm in 1952	74
November	23.9°C1 Nov 2000	-27.2°C26 Nov 1977	122 mm2 Nov 1961	270 mm1961 · driest 4 mm in 2002	74
December	20.6°C15 Dec 2021	-31.7°C24 Dec 1983	53 mm13 Dec 2015	117 mm2007 · driest 5 mm in 1998	74

Typical days per month at DUBUQUE RGNL AP, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	30	<1	8
February	0	0	26	1	7
March	<1	0	23	2	4
April	2	0	8	4	1
May	8	1	<1	4	0
June	19	5	0	4	0
July	25	8	0	4	0
August	22	5	0	3	0
September	11	2	<1	3	0
October	2	<1	7	3	<1
November	0	0	20	2	2
December	0	0	29	2	6

The best month has moved. On the 1961–1990 numbers the strongest month here was June (scoring 82); on 2011–2025 it is September (86). Both are scored the same way, from the same station — only the climate underneath changed.

How often, not how much — every day in DUBUQUE RGNL 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%	20%	3%	18%	-6.8–-0.5°C
February	<1%	20%	3%	21%	-4.4–3.9°C
March	4%	27%	7%	31%	2.6–10.0°C
April	16%	32%	12%	40%	11.5–17.0°C
May	41%	32%	12%	42%	18.2–23.3°C
June	65%	31%	12%	37%	24.2–27.9°C
July	73%	26%	11%	28%	26.0–29.5°C
August	74%	24%	11%	26%	24.5–28.1°C
September	56%	24%	10%	26%	20.6–24.8°C
October	22%	23%	8%	24%	13.3–18.2°C
November	3%	22%	6%	20%	3.2–9.8°C
December	0%	23%	5%	22%	-4.3–3.4°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.

1952Each stripe is one year’s mean temperature against the 72-year average. Warmest: 2024. Coolest: 2014.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4882797
NOAA station: USW00094908 · DUBUQUE RGNL AP
Station distance: 11.3 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 30 usable years
Daylight: Calculated from latitude 42.30°, 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 DUBUQUE RGNL AP is what differs

Peosta→La Motte→Saint Donatus→Centralia→Bernard→Graf→

Or put two places side by side: Zwingle vs Peosta

Best time to visitZwingle.

August

July

May

The whole year,without the guesswork.

Zwingle runs +0.9°Con the 1961–1990 baseline.

Nearby, measured,and named.

Best time to visit
Zwingle.

The whole year,
without the guesswork.

Zwingle runs +0.9°C
on the 1961–1990 baseline.

Nearby, measured,
and named.