Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Fair Oaks experiences four distinct seasons with an average annual temperature of 50°F (10°C). Winters average 24°F in January while summers reach 73°F in July. The area gets 282 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 41. The city sits at an elevation of 691 feet.
Temperature
24°F Jan (-4°C)73°F Jul (23°C)
Annual Average
50.2°F
7% below US avg
January Average
24°F (-4°C)
July Average
73°F (23°C)
Sunny Days
282 days/yr
Geography
Elevation
691 ft (211 m)
Area
0.3 sq mi (0.7 km²)
Population Density
1,031/sq mi
Coordinates
41.0746°N, 87.2573°W
Timezone
America/Indiana/Indianapolis
County
Jasper County County
Nearest Airport
Porter County Regional (VPZ) 29 miles away
Precipitation & Snow
Wettest Month (Jun)4.33"
Driest Month (Feb)1.54"
Air Quality
AQI Median
41.0
Rating
Good
Natural Hazard Risk
Overall Risk
Very Low
Risk Score
32.8 / 100
Social Vulnerability
17.0 / 100
Community Resilience
62.6 / 100
Hazard Breakdown
Tornado
Relatively Low
Hurricane
Very Low
Earthquake
Very Low
Wildfire
Very Low
Flood
Relatively Low
Hail
Relatively Low
Strong Wind
Relatively Moderate
Heat Wave
Relatively Low
Winter Weather
Very Low
Lightning
Very Low
Ice Storm
Very Low
Drought
No Rating
Cold Wave
Relatively Moderate
Landslide
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
144 km
10 km
Jun 17, 2021
Illinois-Indiana border region
M3.8
138 km
6 km
Feb 10, 2010
2 km NW of Lily Lake, Illinois
M3.8
143 km
10 km
Nov 4, 2013
1 km SSW of Lyons, Illinois
M3.2
94 km
1 km
Dec 17, 1990
Illinois-Indiana border region
M3.2
113 km
10 km
Jul 15, 2024
2 km WNW of Somonauk, Illinois
M3.1
137 km
10 km
Jun 10, 2013
4 km NNE of Virgil, Illinois
M2.6
146 km
5 km
Mar 15, 2025
6 km W of Dwight, Illinois
M2.6
104 km
5 km
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
601 tornadoes (EF0+) recorded within 100 km since 1950.
Strongest on record: EF4. Total: 75 fatalities, 1,525 injuries.
Date
Rating
Distance
Path
Fatalities
Apr 26, 1994
EF4
71 km
14.0 mi
3
Jun 29, 1979
EF4
95 km
5.4 mi
0
Jun 13, 1976
EF4
91 km
3.3 mi
2
Mar 20, 1976
EF4
71 km
16.7 mi
0
Apr 3, 1974
EF4
65 km
108.7 mi
18
Apr 21, 1967
EF4
82 km
15.0 mi
33
Apr 11, 1965
EF4
90 km
21.8 mi
0
Apr 17, 1963
EF4
72 km
57.3 mi
1
May 27, 2019
EF3
95 km
13.7 mi
0
Jun 22, 2015
EF3
98 km
16.3 mi
0
Nov 17, 2013
EF3
89 km
37.9 mi
0
Jun 5, 2010
EF3
42 km
7.8 mi
0
Oct 18, 2007
EF3
94 km
20.3 mi
0
Oct 24, 2001
EF3
92 km
47.0 mi
1
Mar 27, 1991
EF3
90 km
15.0 mi
0
Apr 2, 1982
EF3
61 km
12.0 mi
0
Jun 25, 1978
EF3
76 km
27.4 mi
0
Mar 12, 1976
EF3
56 km
12.1 mi
0
Mar 12, 1976
EF3
74 km
12.6 mi
0
Mar 12, 1976
EF3
38 km
38.5 mi
1
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
76 km
Source: NOAA/NCEI Historical Tsunami Database.
Wildfire History
12 wildfires (100+ acres) recorded within 100 km.
Largest: UNNAMED (1,741 acres, 2019).
Year
Name
Acres Burned
Distance
2019
UNNAMED
1,741
83 km
2019
UNNAMED
1,664
79 km
2000
UNNAMED
1,602
28 km
2021
NORTHEAST PRAIRIE UNIT 3
978
72 km
2024
NORTHEAST PRAIRIE 3 RX
938
74 km
1986
OGDEN DUNS
863
59 km
2021
UNNAMED
738
75 km
2021
MIDDLE GRANT CREEK
700
82 km
2019
UNNAMED
698
74 km
2021
21-INDU TOLLESTON DUNES EAST
594
60 km
2017
UNNAMED
549
82 km
2017
17 INDU COWLES DUNES
522
65 km
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
Month
Avg Temperature
Precipitation
Summary
January
24°F (-4°C)
1.7 in
Coldest
February
27°F (-3°C)
1.5 in
Driest
March
38°F (3°C)
2.9 in
April
49°F (10°C)
3.9 in
May
61°F (16°C)
4.1 in
June
70°F (21°C)
4.3 in
Wettest
July
73°F (23°C)
4.0 in
Warmest
August
71°F (22°C)
3.6 in
September
65°F (18°C)
3.5 in
October
53°F (12°C)
2.9 in
November
41°F (5°C)
3.1 in
December
28°F (-2°C)
2.7 in
Fair Oaks has a seasonal temperature swing of 49°F / from 24°F in January to 73°F in July. Total annual precipitation is 38.2 inches, with June being the wettest month (4.3") and February the driest (1.5").