Willmar weather in August

In August, Willmar sees average daytime highs of 79°F and overnight lows near 60°F, with 3.8 in of rain across 9.3 wet days and about 13.9 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 44% of the time in August, and the air most often feels humid.

Daylight stretches from about 14 h 36 min at the start of August to 13 h 12 min by month's end. Set against the rest of the year, August is Willmar's 3rd-clearest and 12th-windiest month. For the whole year in context, see Willmar's year-round climate.

Daytime high
79°
2nd warmest
Overnight low
60°
11th coldest
Rainfall
3.8 in
9.3 wet days
Daylight
13 h 54 min
5:27 AM – 7:22 PM
Cloud cover
49%
3rd clearest
Wind
8 mph
12th windiest
Solar energy
5.56 kWh/m²
Travel score
7.0
out of 10

Willmar is city in Minnesota, USA.

Density
475/km²
people per km²
Founded
1871

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 Willmar reaches about 79°F in the afternoon and slips back to 60°F overnight — a 19°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.

40°60°80°151015202531
Avg high (°F)Avg low (°F)
18062
28062
38061
48061
58061
68061
77961
87961
97961
107960
117960
127960
137960
147960
157960
167960
177860
187860
197860
207860
217860
227859
237859
247859
257859
267859
277859
287858
297858
307758
317758

How August really feels in Willmar

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.

Willmar 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
Jan21° / 0.95.25.490.0
Feb26° / 10°0.954.410.10.0
Mar39° / 22°1.87.24.111.60.3
Apr55° / 35°3.19.92.513.23.4
May68° / 48°4.112.10.114.65.9
Jun77° / 59°5.412.6015.46.3
Jul81° / 63°3.79.7015.16.7
Aug79° / 60°3.89.3013.97.0
Sep71° / 51°3.38.8012.36.9
Oct57° / 39°2.58.10.710.74.3
Nov40° / 25°1.65.73.59.30.5
Dec26° / 12°1.15.55.58.60.0

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 44% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 18% of August, with mostly cloudy or overcast conditions the remaining 38%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16436
26337
36238
46139
56139
66040
75941
85842
95842
105842
115842
125842
135941
145941
156040
166139
176139
186238
196238
206238
216337
226337
236436
246436
256535
266535
276535
286535
296535
306535
316535

Chance of precipitation in August

Any precipitation

Willmar gets around 3.8 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 (%)
131
231
331
431
531
631
731
831
932
1032
1132
1232
1331
1431
1531
1631
1730
1830
1930
2030
2129
2229
2329
2428
2528
2628
2728
2828
2928
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 29% of days. Sticky, muggy-or-worse air turns up on roughly 23% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
11725301971
21825311971
31825311971
41825311871
51825321861
61825321861
71925321861
81925321861
91925321850
102025321850
112025321850
122025321850
132026321850
142126311840
152126311840
162126311840
172226301940
182225301930
192225292030
202325292030
212325282030
222425282030
232426282020
242525272020
252625262020
262725262020
272925252020
283024241920
293224241920
303423231820
313623221720

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
18light breeze
27light breeze
37light breeze
47light breeze
57light breeze
67light breeze
77light breeze
87light 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
279light breeze
289light breeze
299light breeze
309light breeze
319light breeze

Sunrise & sunset in August

DaylightNight

Daylight runs from about 14 h 36 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 84 minutes over August. Sunrise moves from 5:09 AM to 5:45 AM, and sunset from 7:43 PM to 6:55 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.65:097:43
214.55:107:42
314.55:117:41
414.55:127:40
514.45:147:38
614.45:157:37
714.35:167:35
814.35:177:34
914.25:187:33
1014.25:207:31
1114.15:217:30
1214.15:227:28
1314.15:237:26
1414.05:247:25
1514.05:267:23
1613.95:277:22
1713.95:287:20
1813.85:297:18
1913.85:317:17
2013.75:327:15
2113.75:337:13
2213.65:347:11
2313.65:357:10
2413.55:377:08
2513.55:387:06
2613.45:397:04
2713.45:407:02
2813.35:427:01
2913.35:436:59
3013.25:446:57
3113.25:456:55

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.56 kWh/m².

For context, solar energy here swings from a low near 1.53 kWh/m² to a high of 6.44 kWh/m² in July across the year — August's 5.56 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
16.1Intense
26.0Intense
36.0Intense
46.0Bright
55.9Bright
65.9Bright
75.8Bright
85.8Bright
95.8Bright
105.7Bright
115.7Bright
125.7Bright
135.6Bright
145.6Bright
155.6Bright
165.5Bright
175.5Bright
185.5Bright
195.5Bright
205.4Bright
215.4Bright
225.4Bright
235.4Bright
245.3Bright
255.3Bright
265.3Bright
275.2Bright
285.2Bright
295.2Bright
305.1Bright
315.1Bright
Planning a trip in August

Hazard calendar for Willmar

In seasonPeak

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

Willmar'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 Willmar?

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

7.0
Sightseeing
1st-best month of the year
6.6
Beach & pool
2nd-best month of the year

August is one of the better times to visit Willmar for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Willmar in August

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

In August, Willmar sees daytime highs around 79°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 Willmar 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 Willmar peaks around June 20 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 20UV 8Jan 11UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar3Moderate
Apr5Moderate
May6High
Jun9Very high
Jul8Very high
Aug7High
Sep5High
Oct4Moderate
Nov2Low
Dec1Low
Location & terrain

Where is Willmar?

Willmar sits at 45.1°N, 95.0°W, 1,142 ft above sea level, in United States. The nearest listed city is Saint Cloud, 52 mi away.

Topography around Willmar

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

Within 2 miles, the terrain around Willmar has only modest variations in elevation — a maximum elevation change of 105 ft around an average of 1,132 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 230 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 692 ft.

The land around Willmar is covered by trees (23%), grassland (22%) and artificial surfaces (22%) within 2 miles, cropland (62%) within 10 miles, and cropland (74%) within 50 miles.

2 miles
105 ft
10 miles
230 ft
50 miles
692 ft
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
August weather nearby: Saint Cloud 52 mi · Sartell 53 mi · Buffalo 57 mi · Saint Michael 67 mi · Otsego 71 mi · Elk River 73 mi · Chaska 74 mi · Chanhassen 76 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 Willmar (45.1219°, -95.0433°, elevation 1,142 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).