Fond du Lac weather in August

In August, Fond du Lac sees average daytime highs of 77°F and overnight lows near 61°F, with 3.5 in of rain across 10.4 wet days and about 13.8 hours of daylight. It is the 2nd-warmest and 4th-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 34% of the time in August, and the air most often feels comfortable.

Daylight stretches from about 14 h 30 min at the start of August to 13 h 06 min by month's end. Set against the rest of the year, August is Fond du Lac's 3rd-clearest and 12th-windiest month. For the whole year in context, see Fond du Lac's year-round climate.

Daytime high
77°
2nd warmest
Overnight low
61°
11th coldest
Rainfall
3.5 in
10.4 wet days
Daylight
13 h 48 min
5:03 AM – 6:53 PM
Cloud cover
55%
3rd clearest
Wind
7 mph
12th windiest
Solar energy
5.23 kWh/m²
Travel score
6.9
out of 10

Fond du Lac is city in and county seat of Fond du Lac County, Wisconsin, United States.

Density
824/km²
people per km²
Founded
1843

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 Fond du Lac reaches about 77°F in the afternoon and slips back to 61°F overnight — a 16°F spread between the day's warmth and the night's chill. On most days the high lands between 70°F and 85°F. Set against its neighbours, August runs about 2°F cooler than July and about 7°F warmer than September.

50°60°70°80°90°151015202531
Avg high (°F)Avg low (°F)
17963
27963
37963
47962
57862
67862
77862
87862
97862
107862
117862
127862
137862
147761
157761
167761
177761
187761
197761
207761
217761
227761
237761
247760
257760
267660
277660
287660
297660
307659
317659

How August really feels in Fond du Lac

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.

Fond du Lac weather by month

How August compares with the rest of the year at a glance. August is the 2nd-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan26° / 13°1.5879.10.0
Feb29° / 15°1.56.65.710.20.0
Mar40° / 25°2.394.611.60.4
Apr53° / 37°3.611.62.313.23.0
May65° / 48°3.611.30.114.55.7
Jun75° / 59°3.911.1015.26.6
Jul79° / 63°3.210.1014.96.7
Aug77° / 61°3.510.4013.86.9
Sep70° / 53°2.99.2012.36.7
Oct57° / 42°2.89.60.310.84.1
Nov43° / 30°2.08.12.49.50.7
Dec31° / 19°1.875.88.80.0

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 34% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 21% of August, with mostly cloudy or overcast conditions the remaining 45%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15842
25842
35842
45842
55743
65743
75644
85545
95545
105446
115347
125347
135347
145446
155347
165347
175347
185347
195347
205347
215347
225446
235446
245446
255644
265644
275743
285743
295743
305842
315842

Chance of precipitation in August

Any precipitation

Fond du Lac gets around 3.5 in of rain over 10.4 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 33% and peaks near 35% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
135
234
334
434
534
633
733
833
933
1033
1133
1233
1333
1433
1533
1633
1733
1834
1934
2034
2134
2233
2333
2433
2532
2631
2731
2830
2929
3029
3128

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the comfortable band about 28% of days. Sticky, muggy-or-worse air turns up on roughly 24% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1162830197
2162930187
3162930187
4172930187
5172930177
6182930177
7182929176
8192929186
9192928186
10202928185
11202927185
12213027185
13213027184
14213026194
15212926194
16212926204
17212926213
18212925223
19212925223
20212925233
21212825232
22212825232
23222825232
24222825232
25232725232
26242725222
27252625222
28262624212
29282624202
30292524192
31312524182

Wind in August

Winds average 7 mph in August, the calmest month.

Across August, daily wind ranges from about 7 mph on the calmest days to 8 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (mph)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267light breeze
277light breeze
288light breeze
298light breeze
308light breeze
318light breeze

Sunrise & sunset in August

DaylightNight

Daylight runs from about 14 h 30 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 84 minutes over August. Sunrise moves from 4:46 AM to 5:21 AM, and sunset from 7:13 PM to 6:27 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.54:467:13
214.44:477:12
314.44:487:11
414.34:507:10
514.34:517:08
614.34:527:07
714.24:537:06
814.24:547:04
914.14:557:03
1014.14:567:02
1114.04:577:00
1214.04:596:59
1314.05:006:57
1413.95:016:56
1513.95:026:54
1613.85:036:53
1713.85:046:51
1813.75:056:49
1913.75:076:48
2013.65:086:46
2113.65:096:44
2213.55:106:43
2313.55:116:41
2413.45:126:39
2513.45:146:38
2613.45:156:36
2713.35:166:34
2813.35:176:32
2913.25:186:31
3013.25:196:29
3113.15:216:27

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.23 kWh/m².

For context, solar energy here swings from a low near 1.53 kWh/m² to a high of 6.27 kWh/m² in June across the year — August's 5.23 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.8Bright
25.7Bright
35.7Bright
45.7Bright
55.6Bright
65.6Bright
75.5Bright
85.5Bright
95.5Bright
105.4Bright
115.4Bright
125.3Bright
135.3Bright
145.3Bright
155.2Bright
165.2Bright
175.2Bright
185.2Bright
195.1Bright
205.1Bright
215.1Bright
225.0Bright
235.0Bright
245.0Bright
255.0Bright
265.0Bright
274.9Bright
284.9Bright
294.9Bright
304.9Bright
314.8Bright
Planning a trip in August

Is August a good time to visit Fond du Lac?

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
6.3
Beach & pool
2nd-best month of the year

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

What to pack for Fond du Lac in August

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

In August, Fond du Lac sees daytime highs around 77°F and nights near 61°F. Worth packing: light clothes, rain gear and sun protection. About 10 days see rain.

light clothesrain gearsun protection

Sea temperature near Fond du Lac 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 40 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 31 to Aug 28 — about 1 month when the water holds above 68°F.

30°40°50°60°70°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarm
Sea temperature (°F)Comfort
Jan38Bracing
Feb36Bracing
Mar36Bracing
Apr38Bracing
May42Bracing
Jun54Bracing
Jul66Cool
Aug70Refreshing
Sep65Cool
Oct55Bracing
Nov46Bracing
Dec41Bracing

UV index in Fond du Lac 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 Fond du Lac peaks around June 18 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 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 18UV 9Dec 22UV 1
UV index (midday)Level
Jan1Low
Feb2Moderate
Mar4Moderate
Apr6High
May8Very high
Jun9Very high
Jul8Very high
Aug7Very high
Sep6High
Oct3Moderate
Nov2Low
Dec1Low

Air quality in Fond du Lac 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 Fond du Lac is worst in July — around 15 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (November, 8 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateModerateGoodJul 1415 µg/m³Nov 118 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb12Moderate
Mar13Moderate
Apr12Good
May13Moderate
Jun14Moderate
Jul15Moderate
Aug14Moderate
Sep11Good
Oct8Good
Nov8Good
Dec9Good
Location & terrain

Where is Fond du Lac?

Fond du Lac sits at 43.8°N, 88.4°W, 761 ft above sea level, in United States. The nearest listed city is Oshkosh, 18 mi away.

Topography around Fond du Lac

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

Within 2 miles, the terrain around Fond du Lac has only modest variations in elevation — a maximum elevation change of 118 ft around an average of 774 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 551 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 764 ft.

The land around Fond du Lac is covered by artificial surfaces (42%), trees (28%) and grassland (22%) within 2 miles, cropland (48%) within 10 miles, and cropland (42%) and trees (25%) within 50 miles.

2 miles
118 ft
10 miles
551 ft
50 miles
764 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
August weather nearby: Oshkosh 18 mi · West Bend 27 mi · Neenah 29 mi · Menasha 30 mi · Beaver Dam 30 mi · Appleton 34 mi · Kaukauna 35 mi · Sheboygan 36 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 Fond du Lac (43.775°, -88.4388°, elevation 761 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).