Skip to content
VSWeather

Grayslake, IL vs Round Lake Park, IL weather comparison

Grayslake

IL

Grayslake and Round Lake Park have remarkably similar climates.

The year at a glance

Averages from 30 years of climate history, 1991-2020

Annual weather statistics for Grayslake, IL and Round Lake Park, IL
GrayslakeMetricRound Lake Park
181 daysSunny daysclear or partly cloudy skies181 days
37 inPrecipitationper year37 in
130 daysWet daysrain or snow per year130 days
42 inSnowfallper year41 in
10 daysHot daysabove 90 °F10 days
135 daysFreezing nightsat or below 32 °F137 days
72%Humidityaverage relative71%
48 °FAverage temperatureyear round48 °F

Monthly temperatures

Average daily high and low for each month, in °F. The gap between the two lines is what an ordinary day feels like across the year.

GrayslakeRound Lake Park

Daily highs

406080JanMarMayJulSepNovGrayslake, Jan: 29 °FGrayslake, Feb: 33 °FGrayslake, Mar: 44 °FGrayslake, Apr: 56 °FGrayslake, May: 68 °FGrayslake, Jun: 78 °FGrayslake, Jul: 82 °FGrayslake, Aug: 80 °FGrayslake, Sep: 74 °FGrayslake, Oct: 61 °FGrayslake, Nov: 47 °FGrayslake, Dec: 35 °FRound Lake Park, Jan: 30 °FRound Lake Park, Feb: 34 °FRound Lake Park, Mar: 45 °FRound Lake Park, Apr: 57 °FRound Lake Park, May: 69 °FRound Lake Park, Jun: 78 °FRound Lake Park, Jul: 83 °FRound Lake Park, Aug: 81 °FRound Lake Park, Sep: 74 °FRound Lake Park, Oct: 61 °FRound Lake Park, Nov: 47 °FRound Lake Park, Dec: 35 °F

Daily lows

204060JanMarMayJulSepNovGrayslake, Jan: 14 °FGrayslake, Feb: 17 °FGrayslake, Mar: 26 °FGrayslake, Apr: 36 °FGrayslake, May: 47 °FGrayslake, Jun: 58 °FGrayslake, Jul: 63 °FGrayslake, Aug: 61 °FGrayslake, Sep: 54 °FGrayslake, Oct: 42 °FGrayslake, Nov: 31 °FGrayslake, Dec: 21 °FRound Lake Park, Jan: 14 °FRound Lake Park, Feb: 17 °FRound Lake Park, Mar: 26 °FRound Lake Park, Apr: 37 °FRound Lake Park, May: 47 °FRound Lake Park, Jun: 58 °FRound Lake Park, Jul: 62 °FRound Lake Park, Aug: 61 °FRound Lake Park, Sep: 53 °FRound Lake Park, Oct: 42 °FRound Lake Park, Nov: 30 °FRound Lake Park, Dec: 20 °F
View monthly temperatures as a table
Monthly temperatures (°F)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Grayslake high293344566878828074614735
Round Lake Park high303445576978838174614735
Grayslake low141726364758636154423121
Round Lake Park low141726374758626153423020

Monthly precipitation

Total rain plus melted snow for each month, in inches. Taller bars mean wetter months.

GrayslakeRound Lake Park
0.02.04.0JanMarMayJulSepNovGrayslake, Jan: 2.3 inGrayslake, Feb: 2.1 inGrayslake, Mar: 2.6 inGrayslake, Apr: 4.4 inGrayslake, May: 4.2 inGrayslake, Jun: 3.6 inGrayslake, Jul: 3.3 inGrayslake, Aug: 3.6 inGrayslake, Sep: 2.9 inGrayslake, Oct: 3.3 inGrayslake, Nov: 2.6 inGrayslake, Dec: 2.4 inRound Lake Park, Jan: 2.3 inRound Lake Park, Feb: 2.1 inRound Lake Park, Mar: 2.6 inRound Lake Park, Apr: 4.4 inRound Lake Park, May: 4.2 inRound Lake Park, Jun: 3.6 inRound Lake Park, Jul: 3.3 inRound Lake Park, Aug: 3.6 inRound Lake Park, Sep: 2.9 inRound Lake Park, Oct: 3.3 inRound Lake Park, Nov: 2.6 inRound Lake Park, Dec: 2.4 in
View monthly precipitation as a table
Monthly precipitation (inches)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Grayslake2.32.12.64.44.23.63.33.62.93.32.62.4
Round Lake Park2.32.12.64.44.23.63.33.62.93.32.62.4

Monthly sunny days

Days each month with clear or partly cloudy skies, so compare the same month between cities.

GrayslakeRound Lake Park
01020JanMarMayJulSepNovGrayslake, Jan: 11 daysGrayslake, Feb: 11 daysGrayslake, Mar: 14 daysGrayslake, Apr: 14 daysGrayslake, May: 15 daysGrayslake, Jun: 17 daysGrayslake, Jul: 20 daysGrayslake, Aug: 20 daysGrayslake, Sep: 19 daysGrayslake, Oct: 16 daysGrayslake, Nov: 13 daysGrayslake, Dec: 11 daysRound Lake Park, Jan: 11 daysRound Lake Park, Feb: 11 daysRound Lake Park, Mar: 14 daysRound Lake Park, Apr: 14 daysRound Lake Park, May: 15 daysRound Lake Park, Jun: 17 daysRound Lake Park, Jul: 20 daysRound Lake Park, Aug: 20 daysRound Lake Park, Sep: 19 daysRound Lake Park, Oct: 16 daysRound Lake Park, Nov: 13 daysRound Lake Park, Dec: 11 days
View monthly sunny days as a table
Monthly sunny days (days)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Grayslake111114141517202019161311
Round Lake Park111114141517202019161311

Keep comparing

Nearby cities and popular picks for each side of this matchup. Any two cities can be compared from the home page.

Grayslake vs another city

See the full Grayslake, IL climate profile

More Illinois cities

Round Lake Park vs another city

See the full Round Lake Park, IL climate profile

More Illinois cities

About this data

Every figure on this page is a 30 year average computed from daily climate history for 1991-2020, using each city's own coordinates. Wet days count days with measurable precipitation, calibrated against the wet day counts in NOAA's published climate normals. Sunny days count clear plus partly cloudy days, defined as average cloud cover of 63 percent or less and calibrated against NOAA's published sky cover tables. Snowfall figures are model estimates anchored to NOAA station measurements near each city.

Weather data by Open-Meteo.com (CC BY 4.0). Contains modified Copernicus Climate Change Service information (ERA5, ERA5-Land).