Mequon weather in August

In August, Mequon sees average daytime highs of 77°F and overnight lows near 65°F, with 3.5 in of rain across 10.2 wet days and about 13.8 hours of daylight. It is the 2nd-warmest and 3rd-wettest month of the year here.

Day-to-day highs hold fairly steady near 77°F through the month. The sky is clear or mostly clear about 36% of the time in August, and the air most often feels humid.

Daylight stretches from about 14 h 24 min at the start of August to 13 h 06 min by month's end. Set against the rest of the year, August is Mequon's 3rd-clearest and 11th-windiest month. For the whole year in context, see Mequon's year-round climate.

Daytime high
77°
2nd warmest
Overnight low
65°
11th coldest
Rainfall
3.5 in
10.2 wet days
Daylight
13 h 48 min
5:03 AM – 6:50 PM
Cloud cover
55%
3rd clearest
Wind
8 mph
11th windiest
Solar energy
5.37 kWh/m²
Travel score
6.9
out of 10

Mequon is fourth-class city in Ozaukee County, Wisconsin, United States.

Density
183/km²
people per km²
Founded
1957

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 77°F through the month.

A typical August day in Mequon reaches about 77°F in the afternoon and slips back to 65°F overnight — a 12°F spread between the day's warmth and the night's chill. On most days the high lands between 70°F and 84°F. Set against its neighbours, August runs on par with July and about 7°F warmer than September.

50°60°70°80°151015202531
Avg high (°F)Avg low (°F)
17866
27866
37865
47865
57865
67865
77865
87865
97765
107765
117765
127765
137765
147765
157765
167765
177765
187765
197764
207764
217764
227664
237664
247664
257664
267664
277664
287664
297663
307663
317563

How August really feels in Mequon

Once humidity and wind are folded in, August averages 0 days that feel above 90°F and 0 that feel at or below 32°F — the comfort signal a plain temperature reading hides.

Days feeling ≥ 90°F
0
heat index over the day's high
Days feeling ≤ 32°F
0
wind chill below the day's low

August sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Mequon weather by month

How August compares with the rest of the year at a glance. August is the 2nd-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan29° / 17°2.08.96.89.20.0
Feb31° / 19°1.86.85.610.20.0
Mar40° / 27°2.49.2411.60.2
Apr50° / 37°4.011.61.813.22.1
May60° / 47°3.611.1014.44.7
Jun71° / 59°3.510.7015.16.5
Jul78° / 65°3.19.7014.96.9
Aug77° / 65°3.510.2013.86.9
Sep70° / 57°3.08.9012.36.7
Oct58° / 46°3.19.60.210.84.3
Nov44° / 34°2.48.81.89.51.0
Dec34° / 24°2.28.15.38.90.0

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 36% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 19% of August, with mostly cloudy or overcast conditions the remaining 44%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15644
25644
35743
45743
55644
65644
75644
85644
95644
105644
115545
125545
135644
145644
155644
165545
175545
185545
195545
205446
215446
225545
235545
245545
255545
265545
275644
285644
295743
305743
315743

Chance of precipitation in August

Any precipitation

Mequon gets around 3.5 in of rain over 10.2 wet days in August. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 32% and peaks near 34% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
134
234
333
433
533
632
732
832
932
1032
1132
1232
1332
1432
1532
1632
1733
1833
1933
2033
2134
2234
2334
2433
2533
2632
2732
2831
2930
3030
3129

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

Most of August feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, August lands in the humid band about 27% of days. Sticky, muggy-or-worse air turns up on roughly 31% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
11326282310
21326282310
31325282310
41425282310
5142528239
6142528239
7152528239
8152528239
9162528238
10162528238
11162528238
12172528237
13172528237
14172528247
15172528246
16172528246
17172528256
18172527255
19172527265
20172427265
21172427265
22172527265
23182527265
24182527255
25192527255
26192526245
27202526245
28212526235
29232525235
30242525225
31252524215

Wind in August

Winds average 8 mph in August.

Across August, daily wind ranges from about 8 mph on the calmest days to 8 mph at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (mph)Feels
18light breeze
28light breeze
38light breeze
48light breeze
58light breeze
68light breeze
78light breeze
88light breeze
98light breeze
108light breeze
118light breeze
128light breeze
138light breeze
148light breeze
158light breeze
168light breeze
178light breeze
188light breeze
198light breeze
208light breeze
218light breeze
228light breeze
238light breeze
248light breeze
258light breeze
268light breeze
278light breeze
288light breeze
298light breeze
308light breeze
318light breeze

Sunrise & sunset in August

DaylightNight

Daylight runs from about 14 h 24 min at the start of August to 13 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 78 minutes over August. Sunrise moves from 4:46 AM to 5:20 AM, and sunset from 7:10 PM to 6:25 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.44:467:10
214.44:477:09
314.34:487:08
414.34:497:07
514.34:507:05
614.24:517:04
714.24:537:03
814.14:547:01
914.14:557:00
1014.04:566:59
1114.04:576:57
1214.04:586:56
1313.94:596:54
1413.95:006:53
1513.85:016:51
1613.85:036:50
1713.75:046:48
1813.75:056:47
1913.75:066:45
2013.65:076:44
2113.65:086:42
2213.55:096:40
2313.55:116:39
2413.45:126:37
2513.45:136:35
2613.35:146:33
2713.35:156:32
2813.25:166:30
2913.25:176:28
3013.15:186:27
3113.15:206:25

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.37 kWh/m².

For context, solar energy here swings from a low near 1.47 kWh/m² to a high of 6.43 kWh/m² in June across the year — August's 5.37 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.9Bright
25.9Bright
35.8Bright
45.8Bright
55.7Bright
65.7Bright
75.7Bright
85.6Bright
95.6Bright
105.5Bright
115.5Bright
125.5Bright
135.4Bright
145.4Bright
155.4Bright
165.3Bright
175.3Bright
185.3Bright
195.3Bright
205.2Bright
215.2Bright
225.2Bright
235.2Bright
245.1Bright
255.1Bright
265.1Bright
275.1Bright
285.0Bright
295.0Bright
305.0Bright
314.9Bright
Planning a trip in August

Is August a good time to visit Mequon?

Our two travel scores rate August for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

6.9
Sightseeing
1st-best month of the year
6.2
Beach & pool
2nd-best month of the year

August is a reasonable time to visit Mequon for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Mequon in August

From August's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In August, Mequon sees daytime highs around 77°F and nights near 65°F. Worth packing: light clothes, rain gear and sun protection. About 10 days see rain.

light clothesrain gearsun protection

Sea temperature near Mequon in August

The nearest coast averages about 70°F in August — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 10 mi away) is warmest in August at about 70°F and coldest in March near 36°F.

It's comfortable for a long swim from Jul 29 to Aug 30 — about 1.1 months when the water holds above 68°F.

30°40°50°60°70°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarm
Sea temperature (°F)Comfort
Jan38Bracing
Feb36Bracing
Mar36Bracing
Apr38Bracing
May42Bracing
Jun54Bracing
Jul67Cool
Aug70Refreshing
Sep66Cool
Oct56Bracing
Nov46Bracing
Dec41Bracing

UV index in Mequon in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Mequon peaks around June 20 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJun 20UV 9Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb2Moderate
Mar4Moderate
Apr6High
May8Very high
Jun9Very high
Jul8Very high
Aug7Very high
Sep5High
Oct3Moderate
Nov2Low
Dec1Low

Air quality in Mequon in August

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where August falls, not just the annual average.

Air quality in Mequon is worst in June — around 16 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (November, 8 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJun 2116 µg/m³Nov 138 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb12Good
Mar14Moderate
Apr13Moderate
May15Moderate
Jun16Moderate
Jul15Moderate
Aug14Moderate
Sep11Good
Oct8Good
Nov8Good
Dec9Good
Location & terrain

Where is Mequon?

Mequon sits at 43.2°N, 88.0°W, 669 ft above sea level, in United States. The nearest listed city is Germantown, 4.3 mi away.

Topography around Mequon

How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Mequon.

Within 2 miles, the terrain around Mequon has only modest variations in elevation — a maximum elevation change of 295 ft around an average of 764 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 587 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 846 ft.

The land around Mequon is covered by trees (35%), grassland (33%) and cropland (25%) within 2 miles, trees (40%) and grassland (22%) within 10 miles, and water (38%) and cropland (27%) within 50 miles.

2 miles
295 ft
10 miles
587 ft
50 miles
846 ft
treesgrasslandcroplandartificial surfaceswater
August weather nearby: Germantown 4.3 mi · Menomonee Falls 5.0 mi · Brookfield 11 mi · Wauwatosa 12 mi · Milwaukee 14 mi · West Allis 14 mi · West Bend 16 mi · New Berlin 17 mi

United States travel facts

Power plugs
Type A / B
120 V · 60 Hz
Prices
≈ 100% of US
price level, 2025
GDP per capita
$90,027
2025
Happiness
6.8 / 10
World Happiness, 2025
Safe drinking water
98%
of population, 2024
Homicide rate
5.8
per 100k, 2023
Road deaths
12.7
per 100k/yr, 2019
Income group
High
World Bank
Religion
Protestant 47%unaffiliated 23%Roman Catholic 21%Jewish 2%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Mequon (43.2156°, -88.03°, elevation 669 ft), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).