Mount Prospect weather in April

In April, Mount Prospect sees average daytime highs of 57°F and overnight lows near 40°F, with 4.3 in of precipitation across 12.3 wet days and about 13.1 hours of daylight. It is the 7th-warmest and 2nd-wettest month of the year here.

Highs climb over the month, from about 53°F in the first days to 61°F by the end. The sky is clear or mostly clear about 24% 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 Mount Prospect's 9th-clearest and 2nd-windiest month. For the whole year in context, see Mount Prospect's year-round climate.

Daytime high
57°
7th warmest
Overnight low
40°
6th coldest
Precipitation
4.3 in
12.3 wet days
Daylight
13 h 06 min
5:18 AM – 6:26 PM
Cloud cover
67%
9th clearest
Wind
9 mph
2nd windiest
Solar energy
5.03 kWh/m²
Travel score
3.8
out of 10

Mount Prospect is village in Elk Grove and Wheeling Townships in Cook County, Illinois, United States.

Density
2,038/km²
people per km²

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 53°F in the first days to 61°F by the end.

A typical April day in Mount Prospect reaches about 57°F in the afternoon and slips back to 40°F overnight — a 18°F spread between the day's warmth and the night's chill. On most days the high lands between 43°F and 72°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)
15235
25335
35336
45336
55436
65437
75537
85537
95538
105638
115638
125639
135739
145739
155840
165840
175840
185841
195941
205941
215942
226042
236042
246042
256043
266143
276144
286244
296244
306245

How April really feels in Mount Prospect

Once humidity and wind are folded in, April averages 0 days that feel above 90°F and 11 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
11
wind chill below the day's low

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

Mount Prospect weather by month

How April compares with the rest of the year at a glance. April is the 7th-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan31° / 18°2.18.16.19.30.0
Feb35° / 20°1.96.94.810.30.0
Mar46° / 30°2.59.73.211.71.2
Apr57° / 40°4.312.3113.13.8
May68° / 50°4.312.5014.35.9
Jun78° / 61°3.9120156.3
Jul82° / 66°3.611.4014.76.0
Aug80° / 64°3.710.5013.76.5
Sep74° / 56°2.98.5012.37.1
Oct61° / 44°3.19.10.110.85.2
Nov47° / 33°2.48.11.39.61.6
Dec36° / 24°2.18.24.390.0

Cloud cover in April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 24% 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 64%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13268
23268
33268
43367
53367
63367
73466
83367
93565
103565
113565
123664
133763
143763
153664
163763
173862
183862
193961
203862
213862
223862
233862
243763
253763
263763
273862
283862
293763
303664

Chance of precipitation in April

Any precipitationSnow

Mount Prospect gets around 4.3 in of rain and snow over 12.3 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 1 day brings snow.

0%10%20%30%40%50%151015202530
Rain chance (%)Snow chance (%)
1364
2374
3374
4384
5385
6395
7395
8395
9405
10405
11415
12415
13425
14424
15424
16424
17424
18423
19423
20423
21422
22422
23422
24421
25421
26421
27411
28411
29411
30410

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 96% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
19820
29820
39820
49820
59820
69820
79820
89721
99721
109721
119721
129721
139721
149721
159721
169721
179721
189631
199631
209631
219631
229541
239640
249640
259550
269550
279460
289361
299271
309271

Wind in April

Winds average 9 mph in April.

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 6:09 PM to 6:42 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.45:446:09
212.55:426:10
312.55:406:11
412.65:386:13
512.65:376:14
612.75:356:15
712.75:336:16
812.85:316:17
912.85:306:18
1012.95:286:19
1112.95:266:20
1212.95:256:22
1313.05:236:23
1413.05:216:24
1513.15:206:25
1613.15:186:26
1713.25:166:27
1813.25:156:28
1913.35:136:29
2013.35:116:31
2113.45:106:32
2213.45:086:33
2313.55:076:34
2413.55:056:35
2513.55:046:36
2613.65:026:37
2713.65:016:38
2813.74:596:40
2913.74:586:41
3013.84:566:42

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 5.03 kWh/m².

For context, solar energy here swings from a low near 1.61 kWh/m² to a high of 6.43 kWh/m² in June across the year — April's 5.03 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
14.5Bright
24.6Bright
34.6Bright
44.6Bright
54.7Bright
64.7Bright
74.7Bright
84.8Bright
94.8Bright
104.8Bright
114.9Bright
124.9Bright
135.0Bright
145.0Bright
155.0Bright
165.1Bright
175.1Bright
185.1Bright
195.2Bright
205.2Bright
215.2Bright
225.3Bright
235.3Bright
245.3Bright
255.3Bright
265.3Bright
275.3Bright
285.4Bright
295.4Bright
305.4Bright
Planning a trip in April

Is April a good time to visit Mount Prospect?

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

3.8
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 Mount Prospect.

What to pack for Mount Prospect in April

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

In April, Mount Prospect sees daytime highs around 57°F and nights near 40°F. Worth packing: a warm layer, rain gear and sun protection. About 12 days see rain.

a warm layerrain gearsun protection

Sea temperature near Mount Prospect in April

The nearest coast averages about 39°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 17 mi away) is warmest in August at about 72°F and coldest in February near 36°F.

It's comfortable for a long swim from Jul 14 to Sep 14 — about 2.1 months when the water holds above 68°F.

30°40°50°60°70°80°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°F)Comfort
Jan38Bracing
Feb36Bracing
Mar36Bracing
Apr39Bracing
May44Bracing
Jun56Bracing
Jul69Refreshing
Aug72Refreshing
Sep68Refreshing
Oct58Bracing
Nov48Bracing
Dec42Bracing

UV index in Mount Prospect 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 Mount Prospect peaks around June 23 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJun 23UV 9Dec 22UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar4Moderate
Apr6High
May7Very high
Jun9Very high
Jul9Very high
Aug8Very high
Sep6High
Oct3Moderate
Nov2Moderate
Dec2Low

Air quality in Mount Prospect 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 Mount Prospect is worst in July — around 21 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (October, 10 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodJul 921 µg/m³Oct 2410 µg/m³
PM2.5 (µg/m³)Level
Jan12Moderate
Feb15Moderate
Mar18Moderate
Apr19Moderate
May20Moderate
Jun21Moderate
Jul21Moderate
Aug18Moderate
Sep15Moderate
Oct10Good
Nov10Good
Dec11Good
Location & terrain

Where is Mount Prospect?

Mount Prospect sits at 42.1°N, 87.9°W, 669 ft above sea level, in United States. The nearest listed city is Prospect Heights, 1.9 mi away.

Topography around Mount Prospect

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

Within 2 miles, the terrain around Mount Prospect has only modest variations in elevation — a maximum elevation change of 85 ft around an average of 673 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 374 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 892 ft.

The land around Mount Prospect is covered by artificial surfaces (47%) and trees (40%) within 2 miles, artificial surfaces (45%) and trees (37%) within 10 miles, and water (32%) and cropland (25%) within 50 miles.

2 miles
85 ft
10 miles
374 ft
50 miles
892 ft
treesgrasslandcroplandartificial surfaceswater
April weather nearby: Prospect Heights 1.9 mi · Arlington Heights 2.5 mi · Des Plaines 3.7 mi · Rolling Meadows 4.3 mi · Elk Grove Village 4.3 mi · Wheeling 5.0 mi · Palatine 5.6 mi · Buffalo Grove 6.2 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 Mount Prospect (42.0664°, -87.9373°, elevation 669 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).