Temperature, precipitation, air quality, natural hazards, and monthly weather data.
North Bay 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 260 sunny days per year, above the national average. Annual precipitation totals 31.8 inches. Air quality is rated Good with a median AQI of 38. The city sits at an elevation of 611 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
260 days/yr
Geography
Elevation
611 ft (186 m)
Area
0.1 sq mi (0.3 km²)
Population Density
2,164/sq mi
Coordinates
42.7642°N, 87.7806°W
Timezone
America/Chicago
County
Racine County County
Nearest Airport
Batten International (RAC) 2 miles away
Precipitation & Snow
Annual Rainfall31.8"
16% below US avg
Wettest Month (Aug)3.86"
Driest Month (Feb)1.38"
Air Quality
AQI Median
38.0
Rating
Good
Natural Hazard Risk
Overall Risk
Relatively Moderate
Risk Score
85.4 / 100
Social Vulnerability
26.8 / 100
Community Resilience
98.8 / 100
Hazard Breakdown
Tornado
Relatively High
Hurricane
Very Low
Earthquake
Relatively Low
Wildfire
Very Low
Flood
Relatively Moderate
Hail
Relatively Moderate
Strong Wind
Relatively High
Heat Wave
Relatively Moderate
Winter Weather
Relatively Moderate
Lightning
Relatively High
Ice Storm
Relatively Low
Drought
Relatively Low
Cold Wave
Relatively High
Landslide
Very Low
Coastal Flood
Very Low
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
5 earthquakes (M2.5+) recorded within 150 km since 1990.
Strongest on record: M3.8.
Feb 10, 2010
2 km NW of Lily Lake, Illinois
M3.8
106 km
10 km
Nov 4, 2013
1 km SSW of Lyons, Illinois
M3.2
107 km
1 km
Jul 15, 2024
2 km WNW of Somonauk, Illinois
M3.1
146 km
10 km
Mar 25, 2015
3 km WNW of Lake in the Hills, Illinois
M2.9
80 km
6 km
Jun 10, 2013
4 km NNE of Virgil, Illinois
M2.6
105 km
5 km
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
297 tornadoes (EF0+) recorded within 100 km since 1950.
Strongest on record: EF4. Total: 18 fatalities, 798 injuries.
Date
Rating
Distance
Path
Fatalities
Apr 27, 1984
EF4
54 km
6.5 mi
1
Apr 4, 1981
EF4
82 km
1.8 mi
3
Sep 28, 1972
EF4
54 km
5.2 mi
0
Apr 21, 1967
EF4
79 km
8.8 mi
1
Apr 11, 1965
EF4
78 km
9.1 mi
6
Aug 22, 1964
EF4
69 km
2.2 mi
0
Jan 7, 2008
EF3
96 km
13.2 mi
0
Jan 7, 2008
EF3
51 km
10.8 mi
0
Jun 5, 1980
EF3
90 km
10.7 mi
0
Jul 19, 1963
EF3
44 km
10.6 mi
0
Jul 22, 2010
EF2
36 km
1.0 mi
0
Jun 21, 2010
EF2
60 km
5.2 mi
0
Jun 1, 2000
EF2
99 km
17.0 mi
0
May 18, 1997
EF2
44 km
6.0 mi
0
Apr 19, 1996
EF2
35 km
2.0 mi
0
Sep 28, 1986
EF2
78 km
9.0 mi
0
Jun 15, 1981
EF2
95 km
28.7 mi
0
Aug 4, 1980
EF2
49 km
0.1 mi
0
Jul 16, 1980
EF2
94 km
1.4 mi
0
Jun 6, 1980
EF2
65 km
0.3 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
140 km
Source: NOAA/NCEI Historical Tsunami Database.
Wildfire History
2 wildfires (100+ acres) recorded within 100 km.
Largest: IBSP SOUTH F1 RX (690 acres, 2024).
Year
Name
Acres Burned
Distance
2024
IBSP SOUTH F1 RX
690
40 km
2024
RX-HWY Y - SOUTH
553
82 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
27°F (-3°C)
1.4 in
Driest
March
34°F (1°C)
2.3 in
April
44°F (7°C)
3.8 in
May
54°F (12°C)
3.2 in
June
64°F (18°C)
3.6 in
July
72°F (22°C)
3.5 in
Warmest
August
70°F (21°C)
3.9 in
Wettest
September
63°F (17°C)
3.7 in
October
52°F (11°C)
2.4 in
November
40°F (5°C)
2.7 in
December
29°F (-2°C)
2.1 in
North Bay has a seasonal temperature swing of 49°F / from 23°F in January to 72°F in July. Total annual precipitation is 34.2 inches, with August being the wettest month (3.9") and February the driest (1.4").
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