Grayslake and Round Lake have remarkably similar climates.
The year at a glance
Averages from 30 years of climate history, 1991-2020
| Grayslake | Metric | Round Lake |
|---|---|---|
| 181 days | Sunny daysclear or partly cloudy skies | 181 days |
| 37 in | Precipitationper year | 37 in |
| 130 days | Wet daysrain or snow per year | 130 days |
| 42 in | Snowfallper year | 41 in |
| 10 days | Hot daysabove 90 °F | 10 days |
| 135 days | Freezing nightsat or below 32 °F | 138 days |
| 72% | Humidityaverage relative | 71% |
| 48 °F | Average temperatureyear round | 48 °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.
Daily highs
Daily lows
View monthly temperatures as a table
| City | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Grayslake high | 29 | 33 | 44 | 56 | 68 | 78 | 82 | 80 | 74 | 61 | 47 | 35 |
| Round Lake high | 30 | 34 | 45 | 57 | 69 | 79 | 83 | 81 | 74 | 61 | 47 | 35 |
| Grayslake low | 14 | 17 | 26 | 36 | 47 | 58 | 63 | 61 | 54 | 42 | 31 | 21 |
| Round Lake low | 14 | 17 | 26 | 37 | 47 | 58 | 62 | 61 | 53 | 42 | 30 | 20 |
Monthly precipitation
Total rain plus melted snow for each month, in inches. Taller bars mean wetter months.
View monthly precipitation as a table
| City | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Grayslake | 2.3 | 2.1 | 2.6 | 4.4 | 4.2 | 3.6 | 3.3 | 3.6 | 2.9 | 3.3 | 2.6 | 2.4 |
| Round Lake | 2.3 | 2.1 | 2.6 | 4.4 | 4.2 | 3.6 | 3.3 | 3.6 | 2.9 | 3.3 | 2.6 | 2.4 |
Monthly sunny days
Days each month with clear or partly cloudy skies, so compare the same month between cities.
View monthly sunny days as a table
| City | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Grayslake | 11 | 11 | 14 | 14 | 15 | 17 | 20 | 20 | 19 | 16 | 13 | 11 |
| Round Lake | 11 | 11 | 14 | 14 | 15 | 17 | 20 | 20 | 19 | 16 | 13 | 11 |
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
- Grayslake vs Round Lake Park, IL
- Grayslake vs Gages Lake, IL
- Grayslake vs Round Lake Beach, IL
- Grayslake vs Grandwood Park, IL
- Grayslake vs Mundelein, IL
- Grayslake vs New York, NY
- Grayslake vs Los Angeles, CA
- Grayslake vs Chicago, IL
- Grayslake vs Houston, TX
- Grayslake vs Phoenix, AZ
- Grayslake vs Philadelphia, PA
Round Lake vs another city
- Round Lake vs Round Lake Park, IL
- Round Lake vs Round Lake Beach, IL
- Round Lake vs Volo, IL
- Round Lake vs Wauconda, IL
- Round Lake vs Lakemoor, IL
- Round Lake vs New York, NY
- Round Lake vs Los Angeles, CA
- Round Lake vs Chicago, IL
- Round Lake vs Houston, TX
- Round Lake vs Phoenix, AZ
- Round Lake vs Philadelphia, PA
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).