Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Hanamaulu has a warm climate with an average annual temperature of 76°F (25°C). Winters average 72°F in January while summers reach 80°F in July / relatively mild seasonal variation. The area gets 330 sunny days per year, well above the U.S. average of 205 / making it one of the sunnier locations in the country. Annual precipitation totals 36.2 inches. Air quality is rated Good with a median AQI of 24 / among the cleanest air in the country. The city sits at an elevation of 107 feet.
Temperature
72°F Jan (22°C)80°F Jul (26°C)
Annual Average
76.3°F
41% above US avg
January Average
72°F (22°C)
July Average
80°F (26°C)
Sunny Days
330 days/yr
Geography
Elevation
107 ft (33 m)
Area
1.5 sq mi (3.8 km²)
Population Density
3,433/sq mi
Coordinates
21.9969°N, 159.3471°W
Timezone
Pacific/Honolulu
County
Kauai County County
Nearest Airport
Daniel K Inouye International (HNL) 103 miles away
Precipitation & Snow
Annual Rainfall36.2"
5% below US avg
Snowfall0.0"
Wettest Month (Dec)8.78"
Driest Month (Jun)2.09"
Air Quality
AQI Median
24.0
Rating
Good
Natural Hazard Risk
Overall Risk
Relatively Moderate
Risk Score
84.5 / 100
Social Vulnerability
22.6 / 100
Community Resilience
85.1 / 100
Hazard Breakdown
Tornado
Very Low
Hurricane
Relatively Low
Earthquake
Very Low
Wildfire
Relatively Moderate
Flood
Relatively Moderate
Hail
No Rating
Strong Wind
Very Low
Heat Wave
No Rating
Lightning
Relatively High
Drought
Very Low
Cold Wave
No Rating
Landslide
Relatively Moderate
Coastal Flood
Relatively Low
Tsunami
Relatively Moderate
Volcano
No Rating
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
4 earthquakes (M2.5+) recorded within 150 km since 1990.
Strongest on record: M4.0.
May 29, 2022
70 km WSW of Kekaha, Hawaii
M4.0
107 km
16 km
Jun 15, 2013
122 km WSW of Ko Olina, Hawaii
M3.6
142 km
17 km
Aug 22, 2013
17 km W of M?kaha, Hawaii
M2.6
117 km
35 km
Mar 7, 2012
11 km NW of M?kaha, Hawaii
M2.5
120 km
33 km
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Hurricane History
4 hurricanes (Category 1+) recorded within 500 km since 1980.
Strongest on record: Category 4.
Year
Name
Category
Max Wind
Closest
2020
Douglas
Category 1
92 mph
72 km
2014
Ana
Category 1
81 mph
155 km
1992
Iniki
Category 4
144 mph
72 km
1982
Iwa
Category 1
92 mph
90 km
Source: NOAA IBTrACS (Category 1+, 1980-2026).
Tornado History
8 tornadoes (EF0+) recorded within 100 km since 1950.
Strongest on record: EF1.
Date
Rating
Distance
Path
Fatalities
Dec 17, 1967
EF1
34 km
2.5 mi
0
Dec 13, 2008
EF0
33 km
0.9 mi
0
Dec 4, 2005
EF0
80 km
0.1 mi
0
Jan 9, 2005
EF0
35 km
5.0 mi
0
Feb 7, 2004
EF0
82 km
1.0 mi
0
Mar 24, 2002
EF0
15 km
1.0 mi
0
Dec 31, 1971
EF0
35 km
0.1 mi
0
Dec 18, 1971
EF0
34 km
2.5 mi
0
Source: NOAA Storm Prediction Center (EF0+, 1950-2024, US only).
Wildfire History
2 wildfires (100+ acres) recorded within 100 km.
Largest: POKII RIDGE (2,027 acres, 2012).
Year
Name
Acres Burned
Distance
2012
POKII RIDGE
2,027
36 km
2024
KEKAHA FIRE
1,302
36 km
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
Month
Avg Temperature
Precipitation
Summary
January
72°F (22°C)
8.4 in
February
69°F (21°C)
6.8 in
Coldest
March
70°F (21°C)
7.6 in
April
71°F (22°C)
7.5 in
May
73°F (23°C)
3.3 in
June
75°F (24°C)
2.1 in
Driest
July
80°F (26°C)
3.9 in
Warmest
August
77°F (25°C)
2.3 in
September
76°F (25°C)
2.1 in
October
75°F (24°C)
5.1 in
November
74°F (23°C)
7.8 in
December
71°F (22°C)
8.8 in
Wettest
Hanamaulu has a seasonal temperature swing of 10°F / from 69°F in February to 80°F in July. Total annual precipitation is 65.7 inches, with December being the wettest month (8.8") and June the driest (2.1").
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