Superior weather in August

In August, Superior sees average daytime highs of 73°F and overnight lows near 64°F, with 4.0 in of rain across 10.5 wet days and about 14 hours of daylight. It is the 1st-warmest and 3rd-wettest month of the year here.

Day-to-day highs hold fairly steady near 73°F through the month. The sky is clear or mostly clear about 39% of the time in August, and the air most often feels humid.

Daylight stretches from about 14 h 42 min at the start of August to 13 h 12 min by month's end. Set against the rest of the year, August is Superior's 2nd-clearest and 10th-windiest month. For the whole year in context, see Superior's year-round climate.

Daytime high
73°
1st warmest
Overnight low
64°
12th coldest
Rainfall
4.0 in
10.5 wet days
Daylight
14 hours
5:12 AM – 7:13 PM
Cloud cover
52%
2nd clearest
Wind
9 mph
10th windiest
Solar energy
5.19 kWh/m²
Travel score
6.9
out of 10

Superior is city in and county seat of Douglas County, Wisconsin, United States.

Density
185/km²
people per km²
Founded
1854

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 73°F through the month.

A typical August day in Superior reaches about 73°F in the afternoon and slips back to 64°F overnight — a 10°F spread between the day's warmth and the night's chill. On most days the high lands between 66°F and 81°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)
17465
27465
37465
47465
57465
67465
77464
87464
97464
107464
117464
127464
137464
147464
157464
167464
177364
187364
197364
207364
217363
227363
237363
247363
257363
267363
277363
287363
297262
307262
317262

How August really feels in Superior

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.

Superior weather by month

How August compares with the rest of the year at a glance. August is the 1st-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan19° / 1.06.36.98.80.0
Feb22° / 10°1.15.35.6100.0
Mar31° / 20°1.97.35.111.60.0
Apr41° / 31°3.310.24.213.30.4
May53° / 42°3.811.10.514.82.9
Jun65° / 55°4.111.6015.65.5
Jul73° / 64°3.911.7015.36.7
Aug73° / 64°4.010.50146.9
Sep66° / 56°3.610.7012.45.9
Oct52° / 44°4.110.80.810.62.8
Nov38° / 30°2.68.959.20.1
Dec26° / 17°1.87.47.88.40.0

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 39% 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 42%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16535
26535
36535
46436
56337
66238
76139
86040
95941
105842
115743
125644
135644
145545
155545
165446
175446
185446
195446
205545
215545
225545
235644
245644
255644
265743
275743
285743
295941
305941
315941

Chance of precipitation in August

Any precipitation

Superior gets around 4.0 in of rain over 10.5 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 34% and peaks near 35% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
134
234
333
433
533
633
733
833
933
1034
1134
1234
1335
1435
1535
1635
1735
1835
1935
2035
2134
2234
2334
2434
2534
2633
2733
2833
2932
3032
3132

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 32% of days. Sticky, muggy-or-worse air turns up on roughly 17% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1182934155
2182834155
3182834155
4192734155
5192734155
6202734154
7202734154
8212634154
9212634153
10222634153
11222734153
12222734153
13222734152
14222734152
15222733152
16232733152
17232733152
18232833152
19232833152
20232833152
21232832142
22242832142
23242832142
24252831142
25262831132
26272830132
27282729132
28292728132
29302728132
30322626132
31342625132

Wind in August

Winds average 9 mph in August.

Across August, daily wind ranges from about 9 mph on the calmest days to 10 mph at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (mph)Feels
19light breeze
29light breeze
39light breeze
49light breeze
59light breeze
69light breeze
79light breeze
89light breeze
99light breeze
109light breeze
119light breeze
129light breeze
139light breeze
149light breeze
159light breeze
169light breeze
179light breeze
189light breeze
1910light breeze
2010light breeze
2110light breeze
2210light breeze
2310light breeze
2410light breeze
2510light breeze
2610light breeze
2710light breeze
2810light breeze
2910light breeze
3010light breeze
3110light breeze

Sunrise & sunset in August

DaylightNight

Daylight runs from about 14 h 42 min at the start of August to 13 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 90 minutes over August. Sunrise moves from 4:53 AM to 5:32 AM, and sunset from 7:36 PM to 6:45 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.74:537:36
214.74:547:35
314.64:557:34
414.64:567:32
514.64:587:31
614.54:597:29
714.55:007:28
814.45:017:26
914.45:037:25
1014.35:047:23
1114.35:057:22
1214.25:077:20
1314.25:087:18
1414.15:097:17
1514.15:107:15
1614.05:127:13
1714.05:137:12
1813.95:147:10
1913.95:167:08
2013.85:177:06
2113.85:187:04
2213.75:207:03
2313.75:217:01
2413.65:226:59
2513.65:246:57
2613.55:256:55
2713.45:266:53
2813.45:286:51
2913.35:296:49
3013.35:306:47
3113.25:326:45

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.19 kWh/m².

For context, solar energy here swings from a low near 1.21 kWh/m² to a high of 6.06 kWh/m² in July across the year — August's 5.19 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.8Bright
25.8Bright
35.7Bright
45.7Bright
55.6Bright
65.6Bright
75.6Bright
85.5Bright
95.5Bright
105.4Bright
115.4Bright
125.3Bright
135.3Bright
145.3Bright
155.2Bright
165.2Bright
175.1Bright
185.1Bright
195.0Bright
205.0Bright
215.0Bright
224.9Bright
234.9Bright
244.9Bright
254.8Bright
264.8Bright
274.8Bright
284.7Bright
294.7Bright
304.7Bright
314.6Bright
Planning a trip in August

Is August a good time to visit Superior?

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
5.3
Beach & pool
1st-best month of the year

August is a reasonable time to visit Superior for sightseeing.

What to pack for Superior in August

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

In August, Superior sees daytime highs around 73°F and nights near 64°F. Worth packing: light clothes, rain gear and sun protection. About 11 days see rain.

light clothesrain gearsun protection

Sea temperature near Superior in August

The nearest coast averages about 63°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 12 mi away) is warmest in August at about 63°F and coldest in February near 34°F.

The water stays below 68°F all year — cool enough that most swimmers want a wetsuit.

30°40°50°60°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshing
Sea temperature (°F)Comfort
Jan36Bracing
Feb34Bracing
Mar34Bracing
Apr36Bracing
May38Bracing
Jun44Bracing
Jul55Bracing
Aug63Cool
Sep58Bracing
Oct50Bracing
Nov43Bracing
Dec38Bracing

UV index in Superior 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 Superior peaks around June 17 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 11 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 17UV 8Jan 11UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar3Moderate
Apr5Moderate
May6High
Jun8Very high
Jul7High
Aug7High
Sep5High
Oct3Moderate
Nov2Low
Dec1Low
Location & terrain

Where is Superior?

Superior sits at 46.7°N, 92.1°W, 643 ft above sea level, in United States. The nearest listed city is Duluth, 4.3 mi away.

Topography around Superior

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

Within 2 miles, the terrain around Superior has only modest variations in elevation — a maximum elevation change of 118 ft around an average of 630 ft above sea level; within 10 miles, significant variations in elevation — a maximum elevation change of 912 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,322 ft.

The land around Superior is covered by artificial surfaces (33%), water (22%) and trees (21%) within 2 miles, trees (53%) and water (28%) within 10 miles, and trees (77%) within 50 miles.

2 miles
118 ft
10 miles
912 ft
50 miles
1,322 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
August weather nearby: Duluth 4.3 mi · Hibbing 63 mi · Forest Lake 108 mi · Ham Lake 116 mi · Andover 117 mi · Lino Lakes 117 mi · Ramsey 120 mi · Stillwater 120 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 Superior (46.7208°, -92.1041°, elevation 643 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).