Caledonia weather in May

In May, Caledonia sees average daytime highs of 62°F and overnight lows near 49°F, with 3.8 in of rain across 11.6 wet days and about 14.4 hours of daylight. It is the 5th-warmest and 2nd-wettest month of the year here.

Highs climb over the month, from about 56°F in the first days to 67°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 13 h 48 min at the start of May to 14 h 54 min by month's end. Set against the rest of the year, May is Caledonia's 6th-clearest and 8th-windiest month. For the whole year in context, see Caledonia's year-round climate.

Daytime high
62°
5th warmest
Overnight low
49°
8th coldest
Rainfall
3.8 in
11.6 wet days
Daylight
14 h 24 min
4:35 AM – 7:01 PM
Cloud cover
64%
6th clearest
Wind
10 mph
8th windiest
Solar energy
5.84 kWh/m²
Travel score
4.9
out of 10

Caledonia is village in Racine County, Wisconsin, United States.

Density
196/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 56°F in the first days to 67°F by the end.

A typical May day in Caledonia reaches about 62°F in the afternoon and slips back to 49°F overnight — a 13°F spread between the day's warmth and the night's chill. On most days the high lands between 51°F and 73°F. Set against its neighbours, May runs about 11°F warmer than April and about 12°F cooler than June.

40°60°80°151015202531
Avg high (°F)Avg low (°F)
15643
25644
35644
45744
55745
65845
75846
85846
95946
105947
115947
126047
136048
146148
156148
166149
176249
186249
196350
206350
216351
226451
236452
246552
256552
266553
276653
286654
296754
306755
316755

How May really feels in Caledonia

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.

Caledonia 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
Jan29° / 18°2.18.76.89.20.0
Feb31° / 20°1.97.15.410.30.0
Mar40° / 28°2.49.23.611.60.3
Apr51° / 38°4.212.51.613.12.2
May62° / 49°3.811.6014.44.9
Jun73° / 61°3.510.9015.16.6
Jul79° / 67°3.19.8014.86.8
Aug78° / 66°3.610.7013.76.8
Sep71° / 58°3.09.3012.36.8
Oct58° / 46°3.29.20.210.84.5
Nov45° / 35°2.58.71.59.61.1
Dec35° / 25°2.38.758.90.0

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 16% of May, with mostly cloudy or overcast conditions the remaining 58%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13862
23862
33862
43961
53961
63862
73862
83862
94060
104159
114159
124159
134258
144159
154258
164258
174357
184357
194357
204357
214555
224456
234456
244555
254555
264555
274654
284654
294555
304555
314753

Chance of precipitation in May

Any precipitation

Caledonia gets around 3.8 in of rain over 11.6 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 37% and peaks near 38% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
138
238
338
438
538
638
737
837
937
1037
1137
1237
1337
1437
1537
1637
1737
1838
1938
2037
2137
2237
2337
2437
2537
2637
2737
2837
2937
3036
3136

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 85% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
197210
297210
396310
496310
596310
694420
794420
894420
993520
1092530
1191630
1291630
1390730
1489740
1588840
1687841
1786941
1885951
19841051
20811162
21811162
22791272
23761383
24751483
25741493
26731593
277116103
286916114
296817114
306618124
316519124

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
189light breeze
199light breeze
209light breeze
219light breeze
229light breeze
239light breeze
249light breeze
259light breeze
269light breeze
279light breeze
289light breeze
299light breeze
309light breeze
319light breeze

Sunrise & sunset in May

DaylightNight

Daylight runs from about 13 h 48 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 66 minutes over May. Sunrise moves from 4:53 AM to 4:23 AM, and sunset from 6:44 PM to 7:16 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.84:536:44
213.94:526:45
313.94:516:47
414.04:496:48
514.04:486:49
614.14:476:50
714.14:456:51
814.14:446:52
914.24:436:53
1014.24:426:55
1114.34:406:56
1214.34:396:57
1314.34:386:58
1414.44:376:59
1514.44:367:00
1614.44:357:01
1714.54:347:02
1814.54:337:03
1914.54:327:04
2014.64:317:05
2114.64:307:06
2214.64:297:07
2314.74:287:08
2414.74:277:09
2514.74:277:10
2614.84:267:11
2714.84:257:12
2814.84:247:13
2914.84:247:14
3014.94:237:15
3114.94:237:16

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.84 kWh/m².

For context, solar energy here swings from a low near 1.51 kWh/m² to a high of 6.42 kWh/m² in June across the year — May's 5.84 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.4Bright
25.5Bright
35.5Bright
45.5Bright
55.5Bright
65.5Bright
75.6Bright
85.6Bright
95.6Bright
105.7Bright
115.7Bright
125.7Bright
135.8Bright
145.8Bright
155.8Bright
165.9Bright
175.9Bright
185.9Bright
196.0Bright
206.0Bright
216.0Intense
226.0Intense
236.1Intense
246.1Intense
256.1Intense
266.1Intense
276.1Intense
286.2Intense
296.2Intense
306.2Intense
316.2Intense
Planning a trip in May

Is May a good time to visit Caledonia?

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

4.9
Sightseeing
5th-best month of the year
1.1
Beach & pool
5th-best month of the year

May is a reasonable time to visit Caledonia for sightseeing.

What to pack for Caledonia in May

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

In May, Caledonia sees daytime highs around 62°F and nights near 49°F. Worth packing: a warm layer, rain gear and sun protection. About 12 days see rain.

a warm layerrain gearsun protection

Sea temperature near Caledonia in May

The nearest coast averages about 43°F in May — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in August at about 70°F and coldest in March near 36°F.

It's comfortable for a long swim from Jul 24 to Sep 2 — about 1.3 months when the water holds above 68°F.

30°40°50°60°70°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarm
Sea temperature (°F)Comfort
Jan38Bracing
Feb36Bracing
Mar36Bracing
Apr38Bracing
May43Bracing
Jun55Bracing
Jul67Cool
Aug70Refreshing
Sep66Cool
Oct56Bracing
Nov47Bracing
Dec41Bracing

UV index in Caledonia in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 8 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Caledonia peaks around June 22 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 highHighModerateLowJun 22UV 9Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb2Moderate
Mar4Moderate
Apr6High
May8Very high
Jun9Very high
Jul9Very high
Aug8Very high
Sep6High
Oct3Moderate
Nov2Moderate
Dec1Low

Air quality in Caledonia 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 Caledonia is worst in July — around 17 µg/m³ PM2.5 (moderate), about 1.8× the cleanest month (October, 9 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1017 µg/m³Oct 249 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb13Moderate
Mar15Moderate
Apr15Moderate
May16Moderate
Jun17Moderate
Jul17Moderate
Aug16Moderate
Sep13Moderate
Oct9Good
Nov9Good
Dec10Good
Location & terrain

Where is Caledonia?

Caledonia sits at 42.8°N, 87.9°W, 722 ft above sea level, in United States. The nearest listed city is Oak Creek, 6.2 mi away.

Topography around Caledonia

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

Within 2 miles, the terrain around Caledonia has only modest variations in elevation — a maximum elevation change of 171 ft around an average of 735 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 505 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 840 ft.

The land around Caledonia is covered by cropland (49%), grassland (23%) and trees (20%) within 2 miles, cropland (26%), trees (22%) and grassland (22%) within 10 miles, and water (45%) within 50 miles.

2 miles
171 ft
10 miles
505 ft
50 miles
840 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
May weather nearby: Oak Creek 6.2 mi · South Milwaukee 8.1 mi · Franklin 8.1 mi · Mount Pleasant 8.1 mi · Racine 9.3 mi · Cudahy 11 mi · Greenfield 12 mi · Muskego 13 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 Caledonia (42.8078°, -87.9243°, elevation 722 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).