Round Lake weather in March

In March, Round Lake sees average daytime highs of 42°F and overnight lows near 29°F, with 2.6 in of precipitation across 9.7 wet days and about 11.6 hours of daylight. It is the 9th-warmest and 9th-wettest month of the year here.

Highs climb over the month, from about 37°F in the first days to 47°F by the end. The sky is clear or mostly clear about 23% of the time in March, and the air most often feels dry.

Daylight stretches from about 10 h 54 min at the start of March to 12 h 24 min by month's end. Set against the rest of the year, March is Round Lake's 8th-clearest and 7th-windiest month. For the whole year in context, see Round Lake's year-round climate.

Daytime high
42°
9th warmest
Overnight low
29°
4th coldest
Precipitation
2.6 in
9.7 wet days
Daylight
11 h 36 min
6:13 AM – 5:51 PM
Cloud cover
66%
8th clearest
Wind
10 mph
7th windiest
Solar energy
4.06 kWh/m²
Travel score
0.6
out of 10

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

Founded
1908

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

Temperature in March

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 37°F in the first days to 47°F by the end.

A typical March day in Round Lake reaches about 42°F in the afternoon and slips back to 29°F overnight — a 13°F spread between the day's warmth and the night's chill. On most days the high lands between 30°F and 57°F. Set against its neighbours, March runs about 10°F warmer than February and about 11°F cooler than April.

20°40°60°151015202531
Avg high (°F)Avg low (°F)
13724
23724
33725
43825
53825
63826
73926
83926
94027
104027
114128
124128
134128
144229
154229
164330
174330
184330
194431
204431
214431
224532
234532
244632
254633
264633
274733
284734
294734
304834
314835

How March really feels in Round Lake

Once humidity and wind are folded in, March averages 0 days that feel above 90°F and 31 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
31
1 feel bitter (≤ 14°F)

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

Round Lake weather by month

How March compares with the rest of the year at a glance. March is the 9th-warmest and 9th-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 March

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 23% of the time in March.

Beyond those clear spells, partly cloudy skies cover about 14% of March, with mostly cloudy or overcast conditions the remaining 63%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13565
23664
33664
43664
53862
63862
73862
83862
93862
103961
113961
123961
134060
144060
153961
163961
174060
183961
193862
203862
213763
223763
233664
243664
253664
263565
273565
283565
293466
303565
313565

Chance of precipitation in March

Any precipitationSnow

Round Lake gets around 2.6 in of rain and snow over 9.7 wet days in March. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 31% and peaks near 36% on the wettest days, and about 3 days bring snow.

0%10%20%30%40%50%151015202531
Rain chance (%)Snow chance (%)
13118
23118
33117
43117
53116
63115
73115
83114
93014
103013
113012
123012
133011
143011
153010
163010
173010
18309
19309
20308
21318
22317
23327
24327
25336
26336
27346
28345
29355
30355
31365

Humidity in March

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, March lands in the dry band about 100% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)
11000
21000
31000
41000
51000
61000
71000
81000
91000
101000
111000
121000
131000
141000
151000
161000
17991
18991
19991
20991
21991
22991
23991
24991
25991
26991
27991
28991
29991
30991
31991

Wind in March

Winds average 10 mph in March.

Across March, 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.

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
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
3110light breeze

Sunrise & sunset in March

DaylightNight

Daylight runs from about 10 h 54 min at the start of March to 12 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 90 minutes over March. Sunrise moves from 6:38 AM to 5:46 AM, and sunset from 5:33 PM to 6:09 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
110.96:385:33
211.06:365:35
311.06:355:36
411.16:335:37
511.16:315:38
611.26:305:39
711.26:285:41
811.36:265:42
911.36:255:43
1011.46:235:44
1111.46:215:45
1211.56:205:47
1311.56:185:48
1411.56:165:49
1511.66:145:50
1611.66:135:51
1711.76:115:53
1811.76:095:54
1911.86:075:55
2011.86:065:56
2111.96:045:57
2211.96:025:58
2312.06:006:00
2412.05:586:01
2512.15:576:02
2612.15:556:03
2712.25:536:04
2812.25:516:05
2912.35:506:06
3012.35:486:08
3112.45:466:09

Solar energy in March

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in March, about 4.06 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 — March's 4.06 kWh/m² falls in the middle.

012345151015202531
Solar energy (kWh/m²)Level
13.5Moderate
23.5Moderate
33.6Moderate
43.6Moderate
53.7Moderate
63.7Moderate
73.8Moderate
83.8Moderate
93.9Moderate
103.9Moderate
113.9Moderate
124.0Moderate
134.0Bright
144.0Bright
154.1Bright
164.1Bright
174.1Bright
184.2Bright
194.2Bright
204.2Bright
214.2Bright
224.3Bright
234.3Bright
244.3Bright
254.3Bright
264.4Bright
274.4Bright
284.4Bright
294.4Bright
304.5Bright
314.5Bright
Planning a trip in March

Is March a good time to visit Round Lake?

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

0.6
Sightseeing
9th-best month of the year
0.0
Beach & pool
9th-best month of the year

March is a weaker month for outdoor sightseeing in Round Lake.

What to pack for Round Lake in March

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

In March, Round Lake sees daytime highs around 42°F and nights near 29°F. Pack a warm layer. Worth having: a heavy coat and rain gear. About 10 days see rain.

a warm layera heavy coatrain gear

Sea temperature near Round Lake in March

The nearest coast averages about 36°F in March — 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 in March

LowModerateHighVery highExtreme

Clear-sky midday UV in March peaks around 4 — 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 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 in March

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Round Lake 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?

Round Lake sits at 42.4°N, 88.1°W, 797 ft above sea level, in United States. The nearest listed city is Round Lake Beach, 1.2 mi away.

Topography around Round Lake

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

Within 2 miles, the terrain around Round Lake has only modest variations in elevation — a maximum elevation change of 125 ft around an average of 784 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 302 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 827 ft.

The land around Round Lake is covered by trees (31%), grassland (29%) and artificial surfaces (28%) within 2 miles, trees (37%) and grassland (29%) within 10 miles, and water (30%), cropland (26%) and trees (20%) within 50 miles.

2 miles
125 ft
10 miles
302 ft
50 miles
827 ft
treesgrasslandcroplandartificial surfaceswater
March weather nearby: Round Lake Beach 1.2 mi · Grayslake 2.5 mi · Mundelein 7.5 mi · Libertyville 8.7 mi · McHenry 8.7 mi · Gurnee 9.9 mi · Lake Zurich 11 mi · Vernon Hills 11 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 (42.3534°, -88.0934°, elevation 797 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).