Round Lake Beach weather in April

In April, Round Lake Beach sees average daytime highs of 53°F and overnight lows near 40°F, with 4.4 in of precipitation across 12.2 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 49°F in the first days to 57°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 Round Lake Beach's 9th-clearest and 5th-windiest month. For the whole year in context, see Round Lake Beach's year-round climate.

Daytime high
53°
7th warmest
Overnight low
40°
6th coldest
Precipitation
4.4 in
12.2 wet days
Daylight
13 h 06 min
5:18 AM – 6:27 PM
Cloud cover
66%
9th clearest
Wind
10 mph
5th windiest
Solar energy
5 kWh/m²
Travel score
2.9
out of 10

Round Lake Beach is village in Lake County, Illinois, United States of America.

Density
2,061/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 49°F in the first days to 57°F by the end.

A typical April day in Round Lake Beach reaches about 53°F in the afternoon and slips back to 40°F overnight — a 14°F spread between the day's warmth and the night's chill. On most days the high lands between 41°F and 66°F. Set against its neighbours, April runs about 11°F warmer than March and about 11°F cooler than May.

20°40°60°80°151015202530
Avg high (°F)Avg low (°F)
14835
24935
34935
44936
55036
65036
75037
85137
95137
105138
115238
125238
135339
145339
155339
165440
175440
185440
195541
205541
215541
225542
235642
245642
255643
265643
275743
285744
295844
305845

How April really feels in Round Lake Beach

Once humidity and wind are folded in, April averages 0 days that feel above 90°F and 13 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
13
wind chill below the day's low

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

Round Lake Beach 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
Jan30° / 19°2.39.16.49.30.0
Feb33° / 20°2.07.25.310.30.0
Mar42° / 29°2.69.73.211.60.6
Apr53° / 40°4.412.21.213.12.9
May64° / 51°4.112.3014.45.3
Jun76° / 62°3.611.40156.5
Jul80° / 67°3.310.8014.86.4
Aug79° / 66°3.610.7013.76.7
Sep72° / 58°2.99012.36.9
Oct60° / 46°3.39.50.110.84.8
Nov46° / 35°2.68.51.49.61.4
Dec35° / 25°2.48.84.590.0

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 13% of April, with mostly cloudy or overcast conditions the remaining 63%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13565
23466
33466
43565
53565
63466
73565
83565
93664
103664
113664
123664
133862
143862
153763
163862
173862
183862
193961
203961
213961
223961
233862
243862
253862
263763
273862
283862
293862
303664

Chance of precipitation in April

Any precipitationSnow

Round Lake Beach gets around 4.4 in of rain and snow over 12.2 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 1 day brings snow.

0%10%20%30%40%50%151015202530
Rain chance (%)Snow chance (%)
1365
2375
3375
4386
5386
6386
7396
8396
9396
10406
11406
12406
13406
14415
15415
16414
17414
18414
19413
20413
21412
22412
23412
24412
25411
26411
27411
28411
29401
30401

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
99820
109820
119820
129820
139820
149820
159820
169820
179730
189730
199730
209730
219730
229730
239730
249730
259730
269730
279730
289541
299541
309541

Wind in April

Winds average 10 mph in April.

Across April, daily wind ranges from about 10 mph on the calmest days to 10 mph at its breeziest. It stays fairly steady from day to day.

051015151015202530
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
1810light breeze
1910light breeze
2010light breeze
2110light breeze
2210light breeze
2310light breeze
2410light breeze
2510light breeze
2610light breeze
2710light breeze
2810light breeze
2910light breeze
3010light 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 6:10 PM to 6:43 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.45:446:10
212.55:426:11
312.55:416:12
412.65:396:13
512.65:376:14
612.75:356:16
712.75:346:17
812.85:326:18
912.85:306:19
1012.95:286:20
1112.95:276:21
1213.05:256:22
1313.05:236:24
1413.15:216:25
1513.15:206:26
1613.15:186:27
1713.25:166:28
1813.25:156:29
1913.35:136:30
2013.35:126:32
2113.45:106:33
2213.45:086:34
2313.55:076:35
2413.55:056:36
2513.65:046:37
2613.65:026:38
2713.65:016:40
2813.74:596:41
2913.74:586:42
3013.84:566:43

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 5 kWh/m².

For context, solar energy here swings from a low near 1.56 kWh/m² to a high of 6.4 kWh/m² in June across the year — April's 5 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
114.8Bright
124.9Bright
134.9Bright
145.0Bright
155.0Bright
165.0Bright
175.1Bright
185.1Bright
195.2Bright
205.2Bright
215.2Bright
225.2Bright
235.3Bright
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 Round Lake Beach?

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

2.9
Sightseeing
7th-best month of the year
0.0
Beach & pool
7th-best month of the year

April is a weaker month for outdoor sightseeing in Round Lake Beach.

What to pack for Round Lake Beach in April

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

In April, Round Lake Beach sees daytime highs around 53°F and nights near 40°F. Pack a warm layer. Worth having: rain gear and sun protection. About 12 days see rain.

a warm layerrain gearsun protection

Sea temperature near Round Lake Beach 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 11 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 18 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
Jan38Bracing
Feb36Bracing
Mar36Bracing
Apr38Bracing
May43Bracing
Jun55Bracing
Jul68Refreshing
Aug71Refreshing
Sep67Cool
Oct57Bracing
Nov47Bracing
Dec42Bracing

UV index in Round Lake Beach 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 Round Lake Beach 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
May7Very high
Jun9Very high
Jul9Very high
Aug8Very high
Sep6High
Oct3Moderate
Nov2Moderate
Dec1Low

Air quality in Round Lake Beach 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 Round Lake Beach 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 Round Lake Beach?

Round Lake Beach sits at 42.4°N, 88.1°W, 764 ft above sea level, in United States. The nearest listed city is Round Lake, 1.2 mi away.

Topography around Round Lake Beach

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

Within 2 miles, the terrain around Round Lake Beach has only modest variations in elevation — a maximum elevation change of 151 ft around an average of 784 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 318 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 827 ft.

The land around Round Lake Beach is covered by trees (34%), artificial surfaces (33%) and grassland (22%) within 2 miles, trees (36%) and grassland (29%) within 10 miles, and water (30%), cropland (26%) and trees (20%) within 50 miles.

2 miles
151 ft
10 miles
318 ft
50 miles
827 ft
treesgrasslandcroplandartificial surfaceswater
April weather nearby: Round Lake 1.2 mi · Grayslake 3.1 mi · Mundelein 8.7 mi · Libertyville 9.3 mi · McHenry 9.3 mi · Gurnee 9.3 mi · Vernon Hills 12 mi · Lake Zurich 12 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 Round Lake Beach (42.3717°, -88.0901°, elevation 764 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).