United States · 1991–2020

Best time to visit
Menomonee Falls.

August leads for comfortable weather in Menomonee Falls: typically 26.2°C by day, 14.3°C at night, with 97 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortAugust

Typical high26.2°C

Typical low14.3°C

Rain in August97 mm

Comfort

August

August · June · July

78climate match

Beach

July

July · August · June

61climate match

Outdoors

September

September · May · October

80climate match

The weakest month is January, scoring 5 against August’s 78 — days reach only -2.6°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

5-2.6° / -11.5°

Feb

5-0.7° / -10.3°

Mar

55.5° / -4.6°

Apr

2212.3° / 1.2°

May

5419.1° / 7.1°

Jun

7724.6° / 12.4°

Jul

7627.1° / 15.1°

Aug

7826.2° / 14.3°

Sep

7522.4° / 9.8°

Oct

4115.1° / 3.6°

Nov

87.3° / -2.3°

Dec

50.6° / -7.8°

Monthly climate evidence for Menomonee Falls — daylight is calculated from latitude, everything else is measured, sea temperature from the nearest open water 21 km away
Month	Day	Night	Rain	Wet days	Sea	Daylight	Comfort	Coverage
January	-2.6°C	-11.5°C	40 mm	6.3	3.3°C	9 h 19	5	Strong coverage
February	-0.7°C	-10.3°C	35 mm	5.1	2.1°C	10 h 27	5	Strong coverage
March	5.5°C	-4.6°C	49 mm	6.5	2.0°C	11 h 47	5	Strong coverage
April	12.3°C	1.2°C	98 mm	9	3.2°C	13 h 20	22	Strong coverage
May	19.1°C	7.1°C	100 mm	10	5.8°C	14 h 39	54	Strong coverage
June	24.6°C	12.4°C	111 mm	9.2	12.3°C	15 h 22	77	Strong coverage
July	27.1°C	15.1°C	100 mm	8.3	19.3°C	15 h 05	76	Strong coverage
August	26.2°C	14.3°C	97 mm	8.3	21.1°C	13 h 57	78	Strong coverage
September	22.4°C	9.8°C	81 mm	7.2	18.8°C	12 h 27	75	Strong coverage
October	15.1°C	3.6°C	68 mm	8.3	13.1°C	10 h 57	41	Strong coverage
November	7.3°C	-2.3°C	52 mm	6.5	8.0°C	9 h 39	8	Strong coverage
December	0.6°C	-7.8°C	45 mm	6.4	5.1°C	9 h	5	Strong coverage

What has changed

Menomonee Falls 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

+1.3

Feb

+0.3

Mar

+1.2

Apr

-0.8

May

-0.3

Jun

0.0

Jul

0.0

Aug

+0.1

Sep

+1.0

Oct

+0.3

Nov

+0.3

Dec

+2.2

August daytime highs, 2011–2025. Last recorded: 26.0°C.

Records at GERMANTOWN WASTEWATER UTILITY, 1944–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	14.4°C30 Jan 2013	-40.0°C10 Jan 1982	40 mm20 Jan 1988	117 mm1999 · driest 1 mm in 1981	82
February	22.2°C28 Feb 2024	-33.3°C4 Feb 1996	40 mm21 Feb 1997	88 mm2023 · driest 0 mm in 1987	82
March	28.3°C30 Mar 1986	-28.9°C1 Mar 1962	55 mm31 Mar 1998	139 mm2024 · driest 5 mm in 1954	82
April	31.7°C23 Apr 1980	-13.9°C9 Apr 1979	67 mm15 Apr 2026	257 mm2026 · driest 24 mm in 1962	82
May	33.9°C28 May 2018	-6.7°C10 May 1966	90 mm18 May 2000	306 mm2004 · driest 14 mm in 1988	82
June	37.2°C22 Jun 1988	-5.0°C5 Jun 1990	133 mm21 Jun 1997	251 mm2008 · driest 10 mm in 2012	83
July	40.0°C6 Jul 2012	2.2°C22 Jul 1993	179 mm18 Jul 1964	257 mm1964 · driest 5 mm in 1946	83
August	38.9°C17 Aug 1988	0.6°C22 Aug 1992	219 mm10 Aug 2025	311 mm2025 · driest 14 mm in 1955	82
September	37.2°C1 Sep 1953	-5.6°C30 Sep 1993	103 mm11 Sep 1986	265 mm1986 · driest 0 mm in 1979	82
October	31.7°C6 Oct 1963	-13.3°C30 Oct 1993	79 mm3 Oct 1954	153 mm1951 · driest 1 mm in 1952	82
November	25.0°C1 Nov 1950	-26.1°C29 Nov 1976	69 mm4 Nov 2003	170 mm1985 · driest 6 mm in 2007	82
December	19.4°C6 Dec 2001	-31.7°C24 Dec 1983	81 mm19 Dec 2000	136 mm2015 · driest 0 mm in 1960	82

Typical days per month at GERMANTOWN WASTEWATER UTILITY, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	30	1	7
February	0	0	27	1	5
March	<1	0	25	2	4
April	1	<1	12	3	1
May	6	<1	2	3	0
June	15	4	0	4	0
July	23	7	0	3	0
August	21	5	0	3	0
September	10	2	<1	3	0
October	2	<1	9	2	<1
November	0	0	21	2	2
December	0	0	28	1	5

How often, not how much — every day in GERMANTOWN WASTEWATER UTILITY’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%	19%	3%	16%	-6.0–0.5°C
February	0%	17%	3%	11%	-3.8–3.1°C
March	2%	22%	5%	23%	2.3–9.1°C
April	12%	29%	9%	34%	9.8–15.5°C
May	35%	30%	9%	34%	16.9–22.2°C
June	62%	29%	11%	36%	23.0–27.0°C
July	73%	26%	9%	28%	25.8–29.0°C
August	73%	25%	10%	23%	24.5–28.6°C
September	54%	25%	9%	28%	20.6–24.5°C
October	20%	24%	6%	27%	13.0–18.6°C
November	2%	22%	6%	20%	3.9–10.6°C
December	0%	20%	4%	18%	-3.0–3.4°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.

1945Each stripe is one year’s mean temperature against the 80-year average. Warmest: 2012. Coolest: 2014.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5262630
NOAA station: USC00473058 · GERMANTOWN WASTEWATER UTILITY
Station distance: 6.7 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 30 usable years
Daylight: Calculated from latitude 43.18°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Sea temperature: NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 21 km from the place centre. A sheltered bay can run warmer than the open sea it is measured from.
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 GERMANTOWN WASTEWATER UTILITY is what differs

Mequon→Germantown→Dheinsville→Freistadt→Goldenthal→Granville→

Or put two places side by side: Menomonee Falls vs Mequon

Best time to visitMenomonee Falls.

August

July

September

The whole year,without the guesswork.

Menomonee Falls runs +0.5°Con the 1961–1990 baseline.

Nearby, measured,and named.

Best time to visit
Menomonee Falls.

The whole year,
without the guesswork.

Menomonee Falls runs +0.5°C
on the 1961–1990 baseline.

Nearby, measured,
and named.