Sun Prairie weather in April

In April, Sun Prairie sees average daytime highs of 56°F and overnight lows near 38°F, with 3.9 in of precipitation across 12.4 wet days and about 13.1 hours of daylight. It is the 7th-warmest and 3rd-wettest month of the year here.

Highs climb over the month, from about 51°F in the first days to 61°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 Sun Prairie's 10th-clearest and 1st-windiest month. For the whole year in context, see Sun Prairie's year-round climate.

Daytime high
56°
7th warmest
Overnight low
38°
6th coldest
Precipitation
3.9 in
12.4 wet days
Daylight
13 h 12 min
5:22 AM – 6:33 PM
Cloud cover
68%
10th clearest
Wind
9 mph
1st windiest
Solar energy
4.9 kWh/m²
Travel score
3.5
out of 10

Sun Prairie is third-class city in Dane County, Wisconsin, United States.

Density
1,038/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 61°F by the end.

A typical April day in Sun Prairie reaches about 56°F in the afternoon and slips back to 38°F overnight — a 19°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 13°F warmer than March and about 12°F cooler than May.

20°40°60°80°151015202530
Avg high (°F)Avg low (°F)
15133
25133
35133
45234
55234
65234
75335
85335
95435
105436
115436
125536
135537
145637
155637
165638
175738
185738
195839
205839
215840
225940
235940
246041
256041
266041
276142
286142
296143
306243

How April really feels in Sun Prairie

Once humidity and wind are folded in, April averages 0 days that feel above 90°F and 17 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
17
wind chill below the day's low

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

Sun Prairie weather by month

How April compares with the rest of the year at a glance. April is the 7th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan27° / 13°1.67.66.69.20.0
Feb31° / 16°1.56.75.510.20.0
Mar43° / 26°2.48.93.611.60.8
Apr56° / 38°3.912.41.913.13.5
May68° / 49°3.912.30.114.45.8
Jun77° / 59°4.311.8015.16.4
Jul81° / 63°3.49.9014.96.5
Aug79° / 61°3.710.3013.86.7
Sep72° / 53°3.19012.36.9
Oct59° / 41°2.98.90.310.84.5
Nov44° / 30°2.27.92.29.50.9
Dec32° / 19°1.97.55.28.90.0

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 12% of April, with mostly cloudy or overcast conditions the remaining 66%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13169
23169
33169
43169
53169
63268
73268
83268
93268
103169
113268
123268
133268
143268
153268
163367
173466
183466
193565
203565
213664
223664
233664
243664
253664
263763
273664
283664
293763
303664

Chance of precipitation in April

Any precipitationSnow

Sun Prairie gets around 3.9 in of rain and snow over 12.4 wet days in April. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 41% and peaks near 42% on the wettest days, and about 2 days bring snow.

0%10%20%30%40%50%151015202530
Rain chance (%)Snow chance (%)
1368
2378
3378
4388
5398
6398
7409
8409
9419
10419
11429
12429
13428
14428
15428
16427
17427
18426
19426
20425
21425
22424
23424
24423
25423
26413
27413
28412
29412
30412

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
109910
119910
129910
139910
149820
159820
169820
179820
189820
199820
209820
219820
229820
239730
249730
259730
269730
279640
289541
299541
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 5:48 AM to 4:59 AM, and sunset from 6:15 PM to 6:49 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.45:486:15
212.55:466:16
312.55:456:17
412.65:436:18
512.65:416:19
612.75:396:21
712.75:376:22
812.85:366:23
912.85:346:24
1012.95:326:25
1112.95:306:27
1213.05:296:28
1313.05:276:29
1413.15:256:30
1513.15:236:31
1613.25:226:33
1713.25:206:34
1813.35:186:35
1913.35:176:36
2013.45:156:37
2113.45:136:38
2213.55:126:40
2313.55:106:41
2413.65:086:42
2513.65:076:43
2613.75:056:44
2713.75:046:46
2813.75:026:47
2913.85:016:48
3013.84:596:49

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 4.9 kWh/m².

For context, solar energy here swings from a low near 1.57 kWh/m² to a high of 6.28 kWh/m² in June across the year — April's 4.9 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
14.5Bright
24.5Bright
34.5Bright
44.5Bright
54.5Bright
64.6Bright
74.6Bright
84.6Bright
94.7Bright
104.7Bright
114.7Bright
124.8Bright
134.8Bright
144.8Bright
154.9Bright
164.9Bright
174.9Bright
185.0Bright
195.0Bright
205.0Bright
215.1Bright
225.1Bright
235.1Bright
245.2Bright
255.2Bright
265.2Bright
275.2Bright
285.3Bright
295.3Bright
305.3Bright
Planning a trip in April

Is April a good time to visit Sun Prairie?

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

3.5
Sightseeing
7th-best month of the year
0.2
Beach & pool
7th-best month of the year

April is a weaker month for outdoor sightseeing in Sun Prairie.

What to pack for Sun Prairie in April

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

In April, Sun Prairie sees daytime highs around 56°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

UV index in Sun Prairie 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 Sun Prairie peaks around June 18 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 18UV 9Dec 21UV 1
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar4Moderate
Apr6High
May8Very high
Jun9Very high
Jul8Very high
Aug8Very high
Sep6High
Oct3Moderate
Nov2Moderate
Dec1Low

Air quality in Sun Prairie 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 Sun Prairie is worst in July — around 15 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (October, 8 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateModerateGoodJul 1715 µg/m³Oct 248 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb13Moderate
Mar13Moderate
Apr12Good
May13Moderate
Jun14Moderate
Jul15Moderate
Aug14Moderate
Sep11Good
Oct8Good
Nov8Good
Dec9Good
Location & terrain

Where is Sun Prairie?

Sun Prairie sits at 43.2°N, 89.2°W, 958 ft above sea level, in United States. The nearest listed city is Madison, 12 mi away.

Topography around Sun Prairie

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

Within 2 miles, the terrain around Sun Prairie has only modest variations in elevation — a maximum elevation change of 154 ft around an average of 971 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 269 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,043 ft.

The land around Sun Prairie is covered by cropland (32%), artificial surfaces (28%) and grassland (21%) within 2 miles, cropland (53%) within 10 miles, and cropland (48%) and trees (30%) within 50 miles.

2 miles
154 ft
10 miles
269 ft
50 miles
1,043 ft
treesgrasslandcroplandartificial surfaceswater
April weather nearby: Madison 12 mi · Middleton 16 mi · Fitchburg 20 mi · Watertown 24 mi · Beaver Dam 27 mi · Janesville 36 mi · Oconomowoc 37 mi · Beloit 48 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 Sun Prairie (43.1836°, -89.2137°, elevation 958 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. 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).