Allendale weather in May

In May, Allendale sees average daytime highs of 64°F and overnight lows near 49°F, with 4.3 in of rain across 11.7 wet days and about 14.4 hours of daylight. It is the 5th-warmest and 1st-wettest month of the year here.

Highs climb over the month, from about 59°F in the first days to 68°F by the end. The sky is clear or mostly clear about 31% of the time in May, and the air most often feels dry.

Daylight stretches from about 13 h 54 min at the start of May to 14 h 54 min by month's end. Set against the rest of the year, May is Allendale's 5th-clearest and 8th-windiest month. For the whole year in context, see Allendale's year-round climate.

Daytime high
64°
5th warmest
Overnight low
49°
8th coldest
Rainfall
4.3 in
11.7 wet days
Daylight
14 h 30 min
5:26 AM – 7:54 PM
Cloud cover
61%
5th clearest
Wind
9 mph
8th windiest
Solar energy
6.07 kWh/m²
Travel score
5.3
out of 10

Allendale is census designated place in Ottawa County, Michigan, United States.

Density
287/km²
people per km²

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 59°F in the first days to 68°F by the end.

A typical May day in Allendale reaches about 64°F in the afternoon and slips back to 49°F overnight — a 14°F spread between the day's warmth and the night's chill. On most days the high lands between 53°F and 74°F. Set against its neighbours, May runs about 11°F warmer than April and about 10°F cooler than June.

40°60°80°151015202531
Avg high (°F)Avg low (°F)
15844
25844
35945
45945
55946
66046
76046
86047
96147
106147
116248
126248
136248
146349
156349
166349
176450
186450
196450
206551
216551
226652
236652
246653
256753
266753
276854
286854
296855
306955
316955

How May really feels in Allendale

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.

Allendale weather by month

How May compares with the rest of the year at a glance. May is the 5th-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan31° / 21°2.611.7119.20.0
Feb32° / 20°2.08.46.910.20.0
Mar41° / 28°2.69.54.211.60.4
Apr52° / 38°4.1121.613.12.7
May64° / 49°4.311.7014.45.3
Jun74° / 61°3.610.9015.16.7
Jul78° / 66°3.910.7014.86.7
Aug77° / 64°3.810.3013.86.9
Sep71° / 57°3.310.1012.36.6
Oct58° / 46°3.8120.210.84.2
Nov46° / 36°3.111.63.29.51.1
Dec36° / 28°2.712.19.38.90.0

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 31% 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 55%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14456
24357
34357
44357
54258
64258
74258
84357
94357
104456
114456
124456
134555
144555
154555
164555
174753
184753
194753
204753
214753
224852
234753
244753
254852
264852
274753
284753
294852
304852
314852

Chance of precipitation in May

Any precipitation

Allendale gets around 4.3 in of rain over 11.7 wet days in May, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 38% and peaks near 38% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
138
238
338
438
538
638
738
838
937
1037
1137
1237
1338
1438
1538
1638
1738
1838
1937
2037
2137
2237
2337
2437
2538
2638
2738
2838
2938
3038
3138

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 84% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
196310
296310
396310
496310
595410
695410
794420
893520
993520
1092620
1191630
1290730
1389830
1489830
1587940
1686941
17851041
18841051
19821161
20811162
21801172
22781282
23761293
24751393
257413103
267214113
277114114
286915124
296915124
306716134
316517144

Wind in May

Winds average 9 mph in May.

Across May, daily wind ranges from about 8 mph on the calmest days to 9 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
199light breeze
209light breeze
219light breeze
229light breeze
239light breeze
249light breeze
259light breeze
269light breeze
278light breeze
288light breeze
298light breeze
308light breeze
318light breeze

Sunrise & sunset in May

DaylightNight

Daylight runs from about 13 h 54 min at the start of May to 14 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 60 minutes over May. Sunrise moves from 5:45 AM to 5:14 AM, and sunset from 7:37 PM to 8:08 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.95:457:37
213.95:447:38
313.95:427:39
414.05:417:40
514.05:407:41
614.15:387:43
714.15:377:44
814.25:367:45
914.25:347:46
1014.25:337:47
1114.35:327:48
1214.35:317:49
1314.35:307:50
1414.45:297:52
1514.45:287:53
1614.55:267:54
1714.55:257:55
1814.55:247:56
1914.65:237:57
2014.65:227:58
2114.65:227:59
2214.75:218:00
2314.75:208:01
2414.75:198:02
2514.75:188:03
2614.85:178:04
2714.85:178:05
2814.85:168:06
2914.95:158:07
3014.95:158:07
3114.95:148:08

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 6.07 kWh/m².

For context, solar energy here swings from a low near 1.27 kWh/m² to a high of 6.65 kWh/m² in June across the year — May's 6.07 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.7Bright
25.7Bright
35.7Bright
45.8Bright
55.8Bright
65.8Bright
75.8Bright
85.8Bright
95.9Bright
105.9Bright
115.9Bright
126.0Bright
136.0Bright
146.0Intense
156.0Intense
166.1Intense
176.1Intense
186.1Intense
196.2Intense
206.2Intense
216.2Intense
226.2Intense
236.3Intense
246.3Intense
256.3Intense
266.3Intense
276.3Intense
286.4Intense
296.4Intense
306.4Intense
316.4Intense
Planning a trip in May

Is May a good time to visit Allendale?

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

5.3
Sightseeing
5th-best month of the year
1.6
Beach & pool
5th-best month of the year

May is a reasonable time to visit Allendale for sightseeing.

What to pack for Allendale in May

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

In May, Allendale sees daytime highs around 64°F and nights near 49°F. Pack sun protection. Worth having: rain gear. About 12 days see rain.

sun protectionrain gear

Sea temperature near Allendale in May

The nearest coast averages about 44°F in May — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 22 mi away) is warmest in August at about 71°F and coldest in March near 36°F.

It's comfortable for a long swim from Jul 20 to Sep 8 — about 1.7 months when the water holds above 68°F.

30°40°50°60°70°80°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°F)Comfort
Jan39Bracing
Feb37Bracing
Mar36Bracing
Apr38Bracing
May44Bracing
Jun56Bracing
Jul68Cool
Aug71Refreshing
Sep67Cool
Oct58Bracing
Nov49Bracing
Dec43Bracing

UV index in Allendale in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May 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 Allendale peaks around June 21 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 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 21UV 9Dec 21UV 1
UV index (midday)Level
Jan2Low
Feb2Moderate
Mar4Moderate
Apr6High
May7Very high
Jun9Very high
Jul9Very high
Aug7Very high
Sep6High
Oct3Moderate
Nov2Moderate
Dec1Low

Air quality in Allendale in May

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where May falls, not just the annual average.

Air quality in Allendale is worst in June — around 16 µg/m³ PM2.5 (moderate), about 2.4× the cleanest month (November, 7 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJun 2216 µg/m³Nov 137 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb10Good
Mar12Moderate
Apr13Moderate
May15Moderate
Jun16Moderate
Jul16Moderate
Aug14Moderate
Sep11Good
Oct7Good
Nov7Good
Dec7Good
Location & terrain

Where is Allendale?

Allendale sits at 43.0°N, 86.0°W, 653 ft above sea level, in United States. The nearest listed city is Jenison, 9.3 mi away.

Topography around Allendale

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

Within 2 miles, the terrain around Allendale has only modest variations in elevation — a maximum elevation change of 125 ft around an average of 650 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 279 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 692 ft.

The land around Allendale is covered by trees (34%), grassland (29%) and cropland (27%) within 2 miles, trees (38%), cropland (29%) and grassland (27%) within 10 miles, and trees (41%) and water (29%) within 50 miles.

2 miles
125 ft
10 miles
279 ft
50 miles
692 ft
treesgrasslandcroplandartificial surfaceswater
May weather nearby: Jenison 9.3 mi · Walker 9.3 mi · Grandville 11 mi · Wyoming 13 mi · Grand Rapids 14 mi · Holland 15 mi · Kentwood 17 mi · Norton Shores 21 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 Allendale (42.9723°, -85.9536°, elevation 653 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. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).