Willmar weather in May

In May, Willmar sees average daytime highs of 68°F and overnight lows near 48°F, with 4.1 in of precipitation across 12.1 wet days and about 14.6 hours of daylight. It is the 5th-warmest and 2nd-wettest month of the year here.

Highs climb over the month, from about 63°F in the first days to 72°F by the end. The sky is clear or mostly clear about 26% of the time in May, and the air most often feels dry.

Daylight stretches from about 14 hours at the start of May to 15 h 06 min by month's end. Set against the rest of the year, May is Willmar's 6th-clearest and 6th-windiest month. For the whole year in context, see Willmar's year-round climate.

Daytime high
68°
5th warmest
Overnight low
48°
8th coldest
Precipitation
4.1 in
12.1 wet days
Daylight
14 h 42 min
4:57 AM – 7:36 PM
Cloud cover
63%
6th clearest
Wind
10 mph
6th windiest
Solar energy
5.64 kWh/m²
Travel score
5.9
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 May

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 63°F in the first days to 72°F by the end.

A typical May day in Willmar reaches about 68°F in the afternoon and slips back to 48°F overnight — a 20°F spread between the day's warmth and the night's chill. On most days the high lands between 55°F and 81°F. Set against its neighbours, May runs about 13°F warmer than April and about 9°F cooler than June.

40°60°80°151015202531
Avg high (°F)Avg low (°F)
16242
26242
36343
46343
56444
66444
76444
86545
96545
106646
116646
126646
136747
146747
156748
166848
176849
186949
196949
206950
217050
227051
237051
247151
257152
267152
277253
287253
297353
307354
317354

How May really feels in Willmar

Once humidity and wind are folded in, May 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

May 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 May compares with the rest of the year at a glance. May is the 5th-warmest and 2nd-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 May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 26% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 15% of May, with mostly cloudy or overcast conditions the remaining 59%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14258
24159
34159
44159
54060
64060
74159
84159
94159
104159
114258
124258
134258
144258
154258
164258
174258
184258
194159
204159
214159
224060
234060
244060
254060
264159
274060
284159
294159
304159
314159

Chance of precipitation in May

Any precipitationSnow

Willmar gets around 4.1 in of rain and snow over 12.1 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 39% and peaks near 41% on the wettest days, and about 0 day brings snow.

0%10%20%30%40%50%151015202531
Rain chance (%)Snow chance (%)
1362
2362
3371
4381
5381
6381
7381
8381
9380
10380
11390
12390
13390
14390
15390
16390
17390
18390
19390
20390
21390
22400
23400
24400
25400
26410
27410
28410
29410
30410
31410

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the dry band about 86% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
197300
297300
397300
496400
595410
695410
794510
894510
993520
1092620
1192620
1291720
1390730
1490730
1589830
1688831
1786941
1886941
19841051
20841051
21821161
22811162
23801172
24791272
25791272
26771382
27751483
28751483
29731593
30721693
317017103

Wind in May

Winds average 10 mph in May.

Across May, 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
110light breeze
210light breeze
310light breeze
410light breeze
510light breeze
610light breeze
710light breeze
810light breeze
910light breeze
1010light breeze
1110light breeze
1210light breeze
1310light breeze
1410light breeze
1510light breeze
1610light breeze
1710light breeze
1810light breeze
1910light breeze
2010light breeze
2110light breeze
2210light breeze
2310light breeze
2410light breeze
259light breeze
269light breeze
279light breeze
289light breeze
299light breeze
309light breeze
319light breeze

Sunrise & sunset in May

DaylightNight

Daylight runs from about 14 hours at the start of May to 15 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 66 minutes over May. Sunrise moves from 5:17 AM to 4:43 AM, and sunset from 7:18 PM to 7:52 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.05:177:18
214.15:167:19
314.15:147:20
414.15:137:21
514.25:117:23
614.25:107:24
714.35:087:25
814.35:077:26
914.45:067:28
1014.45:047:29
1114.55:037:30
1214.55:027:31
1314.55:007:32
1414.64:597:34
1514.64:587:35
1614.74:577:36
1714.74:567:37
1814.74:557:38
1914.84:547:39
2014.84:527:41
2114.84:517:42
2214.94:517:43
2314.94:507:44
2414.94:497:45
2515.04:487:46
2615.04:477:47
2715.04:467:48
2815.14:457:49
2915.14:457:50
3015.14:447:51
3115.14:437:52

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.64 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 — May's 5.64 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.4Bright
25.4Bright
35.4Bright
45.4Bright
55.4Bright
65.5Bright
75.5Bright
85.5Bright
95.5Bright
105.5Bright
115.5Bright
125.5Bright
135.6Bright
145.6Bright
155.6Bright
165.6Bright
175.7Bright
185.7Bright
195.7Bright
205.7Bright
215.7Bright
225.8Bright
235.8Bright
245.8Bright
255.8Bright
265.8Bright
275.8Bright
285.9Bright
295.9Bright
305.9Bright
315.9Bright
Planning a trip in May

Hazard calendar for Willmar

In seasonPeak

In May, 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 May a good time to visit Willmar?

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

5.9
Sightseeing
5th-best month of the year
3.0
Beach & pool
5th-best month of the year

May is a reasonable time to visit Willmar for sightseeing.

What to pack for Willmar in May

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

In May, Willmar sees daytime highs around 68°F and nights near 48°F. Worth packing: rain gear and sun protection. About 12 days see rain.

rain gearsun protection

UV index in Willmar in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 6 — 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
May 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).