Mankato weather in August

In August, Mankato sees average daytime highs of 79°F and overnight lows near 61°F, with 4.2 in of rain across 9.7 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 79°F through the month. The sky is clear or mostly clear about 43% of the time in August, and the air most often feels humid.

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 Mankato's 3rd-clearest and 12th-windiest month. For the whole year in context, see Mankato's year-round climate.

Daytime high
79°
2nd warmest
Overnight low
61°
11th coldest
Rainfall
4.2 in
9.7 wet days
Daylight
13 h 48 min
5:25 AM – 7:16 PM
Cloud cover
49%
3rd clearest
Wind
8 mph
12th windiest
Solar energy
5.55 kWh/m²
Travel score
6.9
out of 10

Mankato is city in Blue Earth County, Minnesota, USA.

Density
868/km²
people per km²
Founded
1852

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 79°F through the month.

A typical August day in Mankato reaches about 79°F in the afternoon and slips back to 61°F overnight — a 18°F spread between the day's warmth and the night's chill. On most days the high lands between 71°F and 87°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)
18063
28063
38063
48063
58062
68062
78062
88062
97962
107962
117962
127962
137962
147961
157961
167961
177961
187961
197961
207961
217961
227961
237961
247861
257860
267860
277860
287860
297860
307859
317859

How August really feels in Mankato

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.

Mankato 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
Jan23° / 1.06.15.99.10.0
Feb27° / 12°1.05.14.710.20.0
Mar41° / 24°2.27.93.911.60.6
Apr56° / 37°3.610.71.813.23.7
May69° / 50°4.712.60.114.55.9
Jun78° / 60°5.112.4015.26.4
Jul81° / 64°4.09.90156.6
Aug79° / 61°4.29.7013.86.9
Sep72° / 53°3.38.7012.37.0
Oct58° / 40°2.48.40.510.84.6
Nov42° / 27°1.86.23.29.40.7
Dec28° / 14°1.46.75.98.70.0

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 43% 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 38%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16337
26337
36337
46238
56238
66139
76040
86040
96040
105941
115941
125941
136040
146040
156040
166139
176139
186238
196238
206238
216337
226337
236337
246436
256436
266436
276535
286535
296535
306436
316436

Chance of precipitation in August

Any precipitation

Mankato gets around 4.2 in of rain over 9.7 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 31% and peaks near 33% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
130
230
330
430
530
631
731
831
932
1032
1132
1233
1333
1433
1533
1633
1733
1833
1933
2033
2132
2232
2331
2431
2530
2630
2729
2829
2929
3028
3128

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 28% of days. Sticky, muggy-or-worse air turns up on roughly 30% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
112233122102
212233122102
31223322292
41223322292
51224322292
61324322281
71324322281
81324312281
91424312271
101425312371
111425312371
121425302371
131426302360
141526302360
151526292460
161526292460
171526282460
181526282560
191527272560
201527272560
211528262560
221628252560
231628252560
241729242560
251829232560
261929232460
272029222450
282229212350
292328212250
302528202150
312828202050

Wind in August

Winds average 8 mph in August, the calmest month.

Across August, daily wind ranges from about 7 mph on the calmest days to 9 mph at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (mph)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137light 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
319light 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 5:07 AM to 5:42 AM, and sunset from 7:37 PM to 6:50 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.55:077:37
214.45:097:35
314.45:107:34
414.45:117:33
514.35:127:32
614.35:137:30
714.25:147:29
814.25:157:28
914.25:177:26
1014.15:187:25
1114.15:197:23
1214.05:207:22
1314.05:217:20
1413.95:227:19
1513.95:247:17
1613.85:257:16
1713.85:267:14
1813.85:277:12
1913.75:287:11
2013.75:297:09
2113.65:317:07
2213.65:327:06
2313.55:337:04
2413.55:347:02
2513.45:357:01
2613.45:366:59
2713.35:386:57
2813.35:396:55
2913.25:406:53
3013.25:416:52
3113.15:426:50

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.55 kWh/m².

For context, solar energy here swings from a low near 1.56 kWh/m² to a high of 6.38 kWh/m² in July across the year — August's 5.55 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
16.0Intense
26.0Intense
36.0Bright
45.9Bright
55.9Bright
65.9Bright
75.8Bright
85.8Bright
95.8Bright
105.7Bright
115.7Bright
125.7Bright
135.6Bright
145.6Bright
155.5Bright
165.5Bright
175.5Bright
185.5Bright
195.4Bright
205.4Bright
215.4Bright
225.4Bright
235.3Bright
245.3Bright
255.3Bright
265.3Bright
275.2Bright
285.2Bright
295.2Bright
305.1Bright
315.1Bright
Planning a trip in August

Hazard calendar for Mankato

In seasonPeak

In August, Mankato sits inside its rainy season season. The full year is below, with each hazard's peak months called out.

Mankato's rainy season runs April–October, when most of the year's rain falls.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is August a good time to visit Mankato?

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

6.9
Sightseeing
2nd-best month of the year
6.6
Beach & pool
2nd-best month of the year

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

What to pack for Mankato in August

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

In August, Mankato sees daytime highs around 79°F and nights near 61°F. Worth packing: light clothes, rain gear and sun protection. About 10 days see rain.

light clothesrain gearsun protection

UV index in Mankato 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 Mankato peaks around June 15 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 highHighHighModerateLowJun 15UV 9Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb2Moderate
Mar4Moderate
Apr5High
May7High
Jun9Very high
Jul6High
Aug7Very high
Sep6High
Oct4Moderate
Nov2Moderate
Dec1Low
Location & terrain

Where is Mankato?

Mankato sits at 44.2°N, 94.0°W, 830 ft above sea level, in United States. The nearest listed city is Faribault, 38 mi away.

Topography around Mankato

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

Within 2 miles, the terrain around Mankato has only modest variations in elevation — a maximum elevation change of 302 ft around an average of 899 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 374 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 732 ft.

The land around Mankato is covered by trees (53%) and artificial surfaces (27%) within 2 miles, cropland (58%) and trees (23%) within 10 miles, and cropland (80%) within 50 miles.

2 miles
302 ft
10 miles
374 ft
50 miles
732 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
August weather nearby: Faribault 38 mi · Owatonna 39 mi · Northfield 47 mi · Albert Lea 48 mi · Chaska 48 mi · Prior Lake 48 mi · Shakopee 50 mi · Lakeville 51 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 Mankato (44.1591°, -94.0092°, elevation 830 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).