Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Green Oaks experiences four distinct seasons with an average annual temperature of 48°F (9°C). Winters average 23°F in January while summers reach 72°F in July. The area gets 261 sunny days per year, well above the U.S. average of 205 / making it one of the sunnier locations in the country. Air quality is rated Good with a median AQI of 43. The city sits at an elevation of 709 feet.
Temperature
23°F Jan (-5°C)72°F Jul (22°C)
Annual Average
48.4°F
10% below US avg
January Average
23°F (-5°C)
July Average
72°F (22°C)
Sunny Days
261 days/yr
Geography
Elevation
709 ft (216 m)
Area
1.6 sq mi (4.1 km²)
Population Density
1,024/sq mi
Coordinates
42.3000°N, 87.9110°W
Timezone
America/Chicago
County
Lake County County
Nearest Airport
Kenosha Regional (ENW) 20 miles away
Precipitation & Snow
Wettest Month (Aug)4.06"
Driest Month (Feb)1.30"
Air Quality
AQI Median
43.0
Rating
Good
Natural Hazard Risk
Overall Risk
Relatively High
Risk Score
96.0 / 100
Social Vulnerability
14.1 / 100
Community Resilience
78.1 / 100
Hazard Breakdown
Tornado
Very High
Hurricane
Very Low
Earthquake
Relatively Low
Wildfire
Very Low
Flood
Relatively High
Hail
Relatively Moderate
Strong Wind
Very High
Heat Wave
Relatively Moderate
Winter Weather
Relatively Moderate
Lightning
Relatively High
Ice Storm
Relatively Moderate
Drought
Relatively Low
Cold Wave
Very High
Landslide
Very Low
Coastal Flood
Very Low
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
8 earthquakes (M2.5+) recorded within 150 km since 1990.
Strongest on record: M4.2.
Jun 28, 2004
12 km NW of Dayton, Illinois
M4.2
124 km
10 km
Feb 10, 2010
2 km NW of Lily Lake, Illinois
M3.8
61 km
10 km
Sep 2, 1999
8 km W of Amboy, Illinois
M3.5
141 km
5 km
Nov 4, 2013
1 km SSW of Lyons, Illinois
M3.2
56 km
1 km
Jul 15, 2024
2 km WNW of Somonauk, Illinois
M3.1
98 km
10 km
Mar 25, 2015
3 km WNW of Lake in the Hills, Illinois
M2.9
40 km
6 km
Jun 10, 2013
4 km NNE of Virgil, Illinois
M2.6
60 km
5 km
Mar 15, 2025
6 km W of Dwight, Illinois
M2.6
144 km
5 km
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
465 tornadoes (EF0+) recorded within 100 km since 1950.
Strongest on record: EF5. Total: 102 fatalities, 2,131 injuries.
Date
Rating
Distance
Path
Fatalities
Aug 28, 1990
EF5
78 km
16.4 mi
29
Apr 27, 1984
EF4
84 km
6.5 mi
1
Jun 29, 1979
EF4
91 km
5.4 mi
0
Jun 13, 1976
EF4
70 km
3.3 mi
2
Sep 28, 1972
EF4
4 km
5.2 mi
0
Apr 21, 1967
EF4
84 km
25.5 mi
24
Apr 21, 1967
EF4
34 km
8.8 mi
1
Apr 21, 1967
EF4
70 km
15.0 mi
33
Apr 11, 1965
EF4
40 km
9.1 mi
6
Jun 20, 2021
EF3
66 km
17.6 mi
0
Jan 7, 2008
EF3
76 km
13.2 mi
0
Jan 7, 2008
EF3
44 km
10.8 mi
0
Mar 27, 1991
EF3
82 km
15.0 mi
0
Apr 27, 1984
EF3
90 km
9.0 mi
1
Mar 12, 1976
EF3
83 km
22.6 mi
0
Nov 12, 1965
EF3
91 km
4.1 mi
0
Jul 19, 1963
EF3
42 km
10.6 mi
0
Nov 17, 2013
EF2
99 km
5.2 mi
0
Nov 22, 2010
EF2
87 km
18.1 mi
0
Jul 22, 2010
EF2
67 km
1.0 mi
0
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Tsunami History
1 tsunami recorded within 500 km.
Highest wave on record: 3.0 m (10 ft).
Year
Location
Cause
Max Wave
Deaths
Distance
1954
MICHIGAN CITY, IN (LAKE MICHIGAN)
Avalanche
3.0 m
7
108 km
Source: NOAA/NCEI Historical Tsunami Database.
Wildfire History
4 wildfires (100+ acres) recorded within 100 km.
Largest: OGDEN DUNS (863 acres, 1986).
Year
Name
Acres Burned
Distance
1986
OGDEN DUNS
863
96 km
2024
IBSP SOUTH F1 RX
690
14 km
2021
21-INDU TOLLESTON DUNES EAST
594
96 km
2017
17 INDU COWLES DUNES
522
99 km
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
Month
Avg Temperature
Precipitation
Summary
January
23°F (-5°C)
1.7 in
Coldest
February
26°F (-3°C)
1.3 in
Driest
March
36°F (2°C)
2.5 in
April
47°F (8°C)
3.5 in
May
58°F (14°C)
3.4 in
June
67°F (20°C)
3.7 in
July
72°F (22°C)
3.7 in
Warmest
August
71°F (22°C)
4.1 in
Wettest
September
63°F (17°C)
3.7 in
October
52°F (11°C)
2.4 in
November
39°F (4°C)
2.6 in
December
27°F (-3°C)
2.2 in
Green Oaks has a seasonal temperature swing of 50°F / from 23°F in January to 72°F in July. Total annual precipitation is 34.8 inches, with August being the wettest month (4.1") and February the driest (1.3").
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