Waukesha weather in April

In April, Waukesha sees average daytime highs of 55°F and overnight lows near 38°F, with 4.0 in of precipitation across 12.1 wet days and about 13.1 hours of daylight. It is the 7th-warmest and 1st-wettest month of the year here.

Highs climb over the month, from about 51°F in the first days to 60°F by the end. The sky is clear or mostly clear about 22% of the time in April, and the air most often feels dry.

Daylight stretches from about 12 h 24 min at the start of April to 13 h 48 min by month's end. Set against the rest of the year, April is Waukesha's 10th-clearest and 1st-windiest month. For the whole year in context, see Waukesha's year-round climate.

Daytime high
55°
7th warmest
Overnight low
38°
6th coldest
Precipitation
4.0 in
12.1 wet days
Daylight
13 h 12 min
5:18 AM – 6:28 PM
Cloud cover
67%
10th clearest
Wind
9 mph
1st windiest
Solar energy
4.96 kWh/m²
Travel score
3.4
out of 10

Waukesha is city in and county seat of Waukesha County, Wisconsin, United States.

Density
1,109/km²
people per km²
Founded
1839

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in April

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 51°F in the first days to 60°F by the end.

A typical April day in Waukesha reaches about 55°F in the afternoon and slips back to 38°F overnight — a 17°F spread between the day's warmth and the night's chill. On most days the high lands between 42°F and 70°F. Set against its neighbours, April runs about 12°F warmer than March and about 11°F cooler than May.

20°40°60°80°151015202530
Avg high (°F)Avg low (°F)
15033
25034
35134
45134
55135
65235
75235
85235
95336
105336
115437
125437
135537
145538
155538
165638
175638
185639
195739
205739
215840
225840
235840
245841
255941
265942
276042
286042
296043
306143

How April really feels in Waukesha

Once humidity and wind are folded in, April averages 0 days that feel above 90°F and 16 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
16
wind chill below the day's low

The story in April is cold — wind chill drags the overnight "feels like" below the raw low.

Waukesha weather by month

How April compares with the rest of the year at a glance. April is the 7th-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan28° / 15°1.88.36.89.20.0
Feb32° / 18°1.775.610.20.0
Mar43° / 28°2.39.34.111.60.8
Apr55° / 38°4.012.11.713.13.4
May67° / 49°3.811.7014.45.8
Jun77° / 59°3.811.2015.16.5
Jul81° / 64°3.410.1014.86.5
Aug79° / 62°3.610.3013.86.7
Sep72° / 54°3.08.7012.36.9
Oct59° / 43°2.98.90.310.84.7
Nov45° / 32°2.28.11.99.51.1
Dec33° / 21°2.07.85.18.90.0

Cloud cover in April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 22% of the time in April.

Beyond those clear spells, partly cloudy skies cover about 13% of April, with mostly cloudy or overcast conditions the remaining 65%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13268
23169
33169
43169
53070
63070
73169
83169
93169
103268
113367
123367
133466
143466
153466
163565
173664
183763
193763
203763
213862
223862
233862
243961
253961
263961
274060
283961
293961
303961

Chance of precipitation in April

Any precipitationSnow

Waukesha gets around 4.0 in of rain and snow over 12.1 wet days in April, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 40% and peaks near 41% on the wettest days, and about 2 days bring snow.

0%10%20%30%40%50%151015202530
Rain chance (%)Snow chance (%)
1377
2387
3397
4408
5408
6408
7418
8418
9418
10418
11418
12418
13417
14417
15417
16416
17416
18416
19405
20405
21404
22404
23403
24403
25402
26392
27392
28381
29381
30381

Humidity in April

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, April lands in the dry band about 98% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
19910
29910
39910
49910
59910
69910
79910
89910
99910
109820
119820
129820
139820
149820
159820
169820
179820
189730
199730
209730
219730
229730
239730
249730
259640
269640
279640
289640
299550
309451

Wind in April

Winds average 9 mph in April, the windiest month of the year.

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

051015151015202530
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
279light breeze
289light breeze
299light breeze
309light breeze

Sunrise & sunset in April

DaylightNight

Daylight runs from about 12 h 24 min at the start of April to 13 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 84 minutes over April. Sunrise moves from 5:44 AM to 4:56 AM, and sunset from 6:11 PM to 6:45 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.45:446:11
212.55:436:12
312.55:416:13
412.65:396:14
512.65:376:15
612.75:356:17
712.75:346:18
812.85:326:19
912.85:306:20
1012.95:286:21
1112.95:276:22
1213.05:256:24
1313.05:236:25
1413.15:216:26
1513.15:206:27
1613.25:186:28
1713.25:166:30
1813.35:156:31
1913.35:136:32
2013.45:116:33
2113.45:106:34
2213.55:086:35
2313.55:066:37
2413.55:056:38
2513.65:036:39
2613.65:026:40
2713.75:006:41
2813.74:596:42
2913.84:576:44
3013.84:566:45

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 4.96 kWh/m².

For context, solar energy here swings from a low near 1.55 kWh/m² to a high of 6.36 kWh/m² in June across the year — April's 4.96 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
14.5Bright
24.5Bright
34.5Bright
44.6Bright
54.6Bright
64.6Bright
74.7Bright
84.7Bright
94.7Bright
104.8Bright
114.8Bright
124.8Bright
134.9Bright
144.9Bright
155.0Bright
165.0Bright
175.0Bright
185.1Bright
195.1Bright
205.1Bright
215.2Bright
225.2Bright
235.2Bright
245.3Bright
255.3Bright
265.3Bright
275.3Bright
285.3Bright
295.4Bright
305.4Bright
Planning a trip in April

Is April a good time to visit Waukesha?

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

3.4
Sightseeing
7th-best month of the year
0.1
Beach & pool
7th-best month of the year

April is a weaker month for outdoor sightseeing in Waukesha.

What to pack for Waukesha in April

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

In April, Waukesha sees daytime highs around 55°F and nights near 38°F. Worth packing: a warm layer, rain gear and sun protection. About 12 days see rain.

a warm layerrain gearsun protection

Sea temperature near Waukesha in April

The nearest coast averages about 38°F in April — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 20 mi away) is warmest in August at about 70°F and coldest in March near 36°F.

It's comfortable for a long swim from Jul 29 to Aug 30 — about 1.1 months when the water holds above 68°F.

30°40°50°60°70°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarm
Sea temperature (°F)Comfort
Jan38Bracing
Feb36Bracing
Mar36Bracing
Apr38Bracing
May42Bracing
Jun54Bracing
Jul67Cool
Aug70Refreshing
Sep66Cool
Oct56Bracing
Nov46Bracing
Dec41Bracing

UV index in Waukesha in April

LowModerateHighVery highExtreme

Clear-sky midday UV in April 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 Waukesha peaks around June 20 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 20UV 9Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb2Moderate
Mar4Moderate
Apr6High
May8Very high
Jun9Very high
Jul8Very high
Aug8Very high
Sep6High
Oct3Moderate
Nov2Low
Dec1Low

Air quality in Waukesha in April

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Waukesha is worst in July — around 17 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (October, 9 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodJul 1616 µg/m³Oct 239 µg/m³
PM2.5 (µg/m³)Level
Jan12Good
Feb14Moderate
Mar15Moderate
Apr13Moderate
May15Moderate
Jun16Moderate
Jul17Moderate
Aug15Moderate
Sep12Moderate
Oct9Good
Nov9Good
Dec10Good
Location & terrain

Where is Waukesha?

Waukesha sits at 43.0°N, 88.2°W, 814 ft above sea level, in United States. The nearest listed city is New Berlin, 6.8 mi away.

Topography around Waukesha

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

Within 2 miles, the terrain around Waukesha has only modest variations in elevation — a maximum elevation change of 285 ft around an average of 883 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 561 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 846 ft.

The land around Waukesha is covered by artificial surfaces (49%) and trees (33%) within 2 miles, trees (46%) and grassland (28%) within 10 miles, and cropland (34%), water (27%) and trees (21%) within 50 miles.

2 miles
285 ft
10 miles
561 ft
50 miles
846 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
April weather nearby: New Berlin 6.8 mi · Brookfield 7.5 mi · Muskego 8.7 mi · West Allis 11 mi · Greenfield 12 mi · Wauwatosa 12 mi · Menomonee Falls 13 mi · Franklin 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 Waukesha (43.0117°, -88.2315°, elevation 814 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).