Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Winter Harbor experiences four distinct seasons with an average annual temperature of 47°F (9°C). Winters average 24°F in January while summers reach 70°F in July. The area gets 234 sunny days per year, above the national average. Annual precipitation totals 55.5 inches (wetter than the 38-inch national average). Air quality is rated Good with a median AQI of 34. The city sits at an elevation of 40 feet.
Temperature
24°F Jan (-5°C)70°F Jul (21°C)
Annual Average
47.3°F
12% below US avg
January Average
24°F (-5°C)
July Average
70°F (21°C)
Sunny Days
234 days/yr
Geography
Elevation
40 ft (12 m)
Area
2.2 sq mi (5.6 km²)
Population Density
148/sq mi
Coordinates
44.3928°N, 68.0917°W
Timezone
America/New_York
County
Hancock County County
Nearest Airport
Bangor International (BGR) 46 miles away
Precipitation & Snow
Annual Rainfall55.5"
46% above US avg
Wettest Month (Nov)5.75"
Driest Month (Aug)2.95"
Air Quality
AQI Median
34.0
Rating
Good
Natural Hazard Risk
Overall Risk
Relatively Low
Risk Score
55.0 / 100
Social Vulnerability
30.2 / 100
Community Resilience
97.5 / 100
Hazard Breakdown
Tornado
Very Low
Hurricane
Relatively Moderate
Earthquake
Very Low
Wildfire
Very Low
Flood
Relatively Low
Hail
Very Low
Strong Wind
Relatively Low
Heat Wave
Very Low
Winter Weather
Relatively High
Lightning
Relatively Moderate
Ice Storm
Relatively High
Drought
Relatively Low
Cold Wave
Relatively Moderate
Landslide
Relatively Low
Coastal Flood
Relatively Moderate
Avalanche
Very Low
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
45 earthquakes (M2.5+) recorded within 150 km since 1990.
Strongest on record: M3.8.
Feb 26, 1999
0 km NW of China, Maine
M3.8
114 km
3 km
Sep 16, 1994
9 km SE of Lee, Maine
M3.6
101 km
5 km
Sep 16, 1994
7 km SE of Lee, Maine
M3.6
102 km
5 km
Feb 2, 2016
8 km E of Lubec, Maine
M3.6
110 km
5 km
Sep 16, 1994
9 km SE of Lee, Maine
M3.3
101 km
5 km
Jan 14, 2023
7 km ESE of Dedham, Maine
M3.3
49 km
10 km
Sep 16, 1994
9 km SE of Lee, Maine
M3.3
101 km
5 km
Oct 25, 2001
4 km S of Howland, Maine
M3.3
101 km
9 km
Feb 9, 2016
7 km NE of Vanceboro, Maine
M3.3
147 km
1 km
Sep 7, 2000
7 km WSW of Liberty, Maine
M3.2
103 km
5 km
Jul 25, 2010
35 km S of Fundy Bay, Canada
M3.2
99 km
5 km
Sep 5, 1994
13 km NNE of Monhegan, Maine
M3.1
109 km
5 km
Oct 15, 2003
11 km E of Saint Andrews, Canada
M3.1
121 km
18 km
Mar 30, 2010
7 km WSW of Dedham, Maine
M3.0
61 km
4 km
Dec 25, 1999
4 km NE of Saint Albans, Maine
M3.0
118 km
5 km
Aug 17, 2022
3 km SE of Centerville, Maine
M3.0
48 km
5 km
Jan 17, 2021
4 km ESE of Centerville, Maine
M2.9
49 km
5 km
Jul 28, 2024
6 km W of Gardiner, Maine
M2.8
142 km
8 km
Aug 11, 2022
Maine
M2.8
50 km
4 km
Aug 11, 2022
4 km E of Centerville, Maine
M2.8
51 km
6 km
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Hurricane History
3 hurricanes (Category 1+) recorded within 500 km since 1980.
Strongest on record: Category 1.
Year
Name
Category
Max Wind
Closest
2010
Earl
Category 1
75 mph
247 km
2008
Kyle
Category 1
75 mph
165 km
1991
Bob
Category 1
—
278 km
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Tornado History
10 tornadoes (EF0+) recorded within 100 km since 1950.
Strongest on record: EF2. Total: 7 injuries.
Date
Rating
Distance
Path
Fatalities
Sep 15, 1961
EF2
41 km
19.1 mi
0
Aug 16, 1959
EF2
83 km
2.0 mi
0
Aug 14, 1977
EF1
47 km
0.3 mi
0
Aug 8, 1969
EF1
92 km
1.0 mi
0
Jul 1, 1968
EF1
65 km
0.3 mi
0
Jun 10, 1965
EF1
40 km
1.0 mi
0
Aug 17, 1959
EF1
54 km
0.8 mi
0
Jul 2, 1958
EF1
48 km
8.9 mi
0
Jul 2, 1958
EF1
71 km
2.7 mi
0
May 29, 1961
EF0
98 km
4.7 mi
0
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Tsunami History
1 tsunami recorded within 500 km.
Highest wave on record: 3.6 m (12 ft).
Year
Location
Cause
Max Wave
Deaths
Distance
2008
MAINE
Avalanche
3.6 m
—
144 km
Source: NOAA/NCEI Historical Tsunami Database.
Wildfire History
4 wildfires (100+ acres) recorded within 100 km.
Largest: SUNKEN STR (1,201 acres, 1985).
Year
Name
Acres Burned
Distance
1985
SUNKEN STR
1,201
86 km
1984
UNNAMED
901
44 km
2006
CENTERVILLE FIRE
705
45 km
2001
UNNAMED
627
39 km
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
Month
Avg Temperature
Precipitation
Summary
January
24°F (-5°C)
4.9 in
February
23°F (-5°C)
3.9 in
Coldest
March
31°F (-0°C)
4.4 in
April
42°F (5°C)
4.7 in
May
52°F (11°C)
4.3 in
June
60°F (16°C)
3.7 in
July
70°F (21°C)
3.4 in
Warmest
August
66°F (19°C)
3.0 in
Driest
September
58°F (14°C)
4.2 in
October
48°F (9°C)
4.6 in
November
39°F (4°C)
5.8 in
Wettest
December
27°F (-3°C)
5.4 in
Winter Harbor has a seasonal temperature swing of 47°F / from 23°F in February to 70°F in July. Total annual precipitation is 52.2 inches, with November being the wettest month (5.8") and August the driest (3.0").
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