Winona weather in August

In August, Winona sees average daytime highs of 78°F and overnight lows near 60°F, with 3.7 in of rain across 9.3 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 78°F through the month. The sky is clear or mostly clear about 38% 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 Winona's 3rd-clearest and 12th-windiest month. For the whole year in context, see Winona's year-round climate.

Daytime high
78°
2nd warmest
Overnight low
60°
11th coldest
Rainfall
3.7 in
9.3 wet days
Daylight
13 h 48 min
5:15 AM – 7:06 PM
Cloud cover
54%
3rd clearest
Wind
6 mph
12th windiest
Solar energy
5.39 kWh/m²
Travel score
6.9
out of 10

Winona is city and the county seat of Winona County, Minnesota, United States.

Density
433/km²
people per km²
Founded
1805

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 78°F through the month.

A typical August day in Winona reaches about 78°F in the afternoon and slips back to 60°F overnight — a 18°F spread between the day's warmth and the night's chill. On most days the high lands between 70°F and 86°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)
18062
27962
37962
47962
57962
67962
77961
87961
97861
107861
117861
127861
137861
147861
157861
167860
177860
187860
197860
207860
217860
227860
237860
247860
257760
267760
277759
287759
297759
307759
317658

How August really feels in Winona

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.

Winona 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
Jan25° / 10°1.26.76.39.10.0
Feb29° / 13°1.26.15.210.20.0
Mar42° / 25°2.394.311.60.6
Apr56° / 37°3.711.6213.23.5
May67° / 49°4.513.10.114.55.7
Jun76° / 59°5.112.4015.26.3
Jul80° / 63°4.110.60156.6
Aug78° / 60°3.79.3013.86.9
Sep71° / 52°3.39.3012.36.8
Oct57° / 40°2.98.90.510.84.2
Nov42° / 28°2.06.93.39.40.6
Dec29° / 16°1.57.368.80.0

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 38% 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 (%)
15743
25842
35743
45644
55644
65545
75446
85446
95347
105347
115347
125347
135347
145446
155446
165446
175446
185545
195545
205644
215644
225743
235743
245842
255842
265842
276040
286040
296040
306040
316139

Chance of precipitation in August

Any precipitation

Winona gets around 3.7 in of rain over 9.3 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 30% and peaks near 32% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
129
229
329
429
529
630
730
830
931
1031
1131
1231
1331
1432
1532
1632
1732
1832
1931
2031
2131
2231
2330
2430
2529
2629
2729
2828
2928
3028
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 27% of days. Sticky, muggy-or-worse air turns up on roughly 25% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
11426312181
21427312071
31427312071
41427312071
51527312071
61527312061
71627302061
81627302061
91728292060
101728292050
111829292050
121829282050
131829282050
141829282040
151929282040
161929272040
171929272140
181929272140
191929272130
202028272130
212028272230
222128272130
232128262130
242227262130
252327252130
262527252040
272626242040
282826241940
292925231840
303125231740
313325221640

Wind in August

Winds average 6 mph in August, the calmest month.

Across August, daily wind ranges from about 6 mph on the calmest days to 7 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (mph)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm
317calm

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 4:58 AM to 5:33 AM, and sunset from 7:27 PM to 6:40 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.54:587:27
214.44:597:26
314.45:017:24
414.45:027:23
514.35:037:22
614.35:047:21
714.25:057:19
814.25:067:18
914.25:077:16
1014.15:087:15
1114.15:107:14
1214.05:117:12
1314.05:127:11
1413.95:137:09
1513.95:147:07
1613.85:157:06
1713.85:177:04
1813.75:187:03
1913.75:197:01
2013.75:206:59
2113.65:216:58
2213.65:226:56
2313.55:246:54
2413.55:256:53
2513.45:266:51
2613.45:276:49
2713.35:286:47
2813.35:306:46
2913.25:316:44
3013.25:326:42
3113.15:336:40

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.39 kWh/m².

For context, solar energy here swings from a low near 1.49 kWh/m² to a high of 6.26 kWh/m² in July across the year — August's 5.39 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.9Bright
25.9Bright
35.8Bright
45.8Bright
55.8Bright
65.7Bright
75.7Bright
85.7Bright
95.6Bright
105.6Bright
115.5Bright
125.5Bright
135.5Bright
145.4Bright
155.4Bright
165.4Bright
175.3Bright
185.3Bright
195.3Bright
205.3Bright
215.2Bright
225.2Bright
235.2Bright
245.2Bright
255.1Bright
265.1Bright
275.1Bright
285.0Bright
295.0Bright
305.0Bright
315.0Bright
Planning a trip in August

Is August a good time to visit Winona?

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
6.5
Beach & pool
2nd-best month of the year

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

What to pack for Winona in August

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

In August, Winona sees daytime highs around 78°F and nights near 60°F. Worth packing: light clothes, rain gear and sun protection. About 9 days see rain.

light clothesrain gearsun protection

UV index in Winona 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 Winona peaks around June 14 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 12 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 highVery highHighModerateLowJun 14UV 9Jan 12UV 1
UV index (midday)Level
Jan1Low
Feb2Moderate
Mar3Moderate
Apr5High
May8Very high
Jun9Very high
Jul7High
Aug7Very high
Sep6High
Oct3Moderate
Nov2Low
Dec2Low
Location & terrain

Where is Winona?

Winona sits at 44.0°N, 91.6°W, 666 ft above sea level, in United States. The nearest listed city is Onalaska, 23 mi away.

Topography around Winona

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

Within 2 miles, the terrain around Winona has only modest variations in elevation — a maximum elevation change of 610 ft around an average of 722 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 725 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 833 ft.

The land around Winona is covered by trees (42%) and artificial surfaces (26%) within 2 miles, trees (52%) and cropland (27%) within 10 miles, and trees (46%) and cropland (42%) within 50 miles.

2 miles
610 ft
10 miles
725 ft
50 miles
833 ft
treesgrasslandcroplandartificial surfaceswaterwetland
August weather nearby: Onalaska 23 mi · North La Crosse 24 mi · La Crosse 26 mi · Rochester 41 mi · Eau Claire 53 mi · Red Wing 57 mi · Menomonie 58 mi · Austin 71 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 Winona (44.05°, -91.6393°, elevation 666 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. 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).