Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Horikoshi enjoys a temperate climate with an average annual temperature of 59°F (15°C). Winters average 40°F in January while summers reach 78°F in July. The area gets 232 sunny days per year, above the national average. Annual precipitation totals 57.4 inches (wetter than the 38-inch national average). The city sits at an elevation of 36 feet.
Temperature
40°F Jan (4°C)78°F Jul (25°C)
Annual Average
58.5°F
8% above US avg
January Average
40°F (4°C)
July Average
78°F (25°C)
Sunny Days
232 days/yr
Geography
Elevation
36 ft (11 m)
Area
313.6 sq mi (812.1 km²)
Population Density
44/sq mi
Coordinates
34.4575°N, 134.3013°W
Timezone
Asia/Tokyo
Precipitation & Snow
Annual Rainfall57.4"
51% above US avg
Snowfall0.0"
Wettest Month (Sep)9.33"
Driest Month (Dec)1.22"
Air Quality
Earthquake History
231 earthquakes (M2.5+) recorded within 150 km since 1990.
Strongest on record: M6.9.
Jan 16, 1995
8 km S of Akashi, Japan
M6.9
67 km
22 km
Apr 12, 2013
6 km WNW of Sumoto, Japan
M5.8
49 km
14 km
Aug 20, 1999
22 km SE of Kainan, Japan
M5.7
112 km
66 km
Aug 28, 1991
9 km SSW of Yasugich?, Japan
M5.5
140 km
13 km
Jun 17, 2018
near the south coast of western Honshu, Japan
M5.5
129 km
10 km
Oct 8, 2000
32 km N of Sh?bara, Japan
M5.4
138 km
10 km
Sep 24, 2003
5 km WNW of Ayabe, Japan
M5.4
126 km
372 km
Jan 11, 2001
15 km E of Tottori, Japan
M5.3
114 km
33 km
Sep 3, 1997
21 km S of Yasugich?, Japan
M5.3
131 km
10 km
Sep 16, 2002
24 km SW of Kurayoshi, Japan
M5.3
107 km
10 km
Oct 8, 2000
8 km SSW of Yonago, Japan
M5.2
135 km
10 km
Mar 13, 2019
22 km ESE of Anan, Japan
M5.2
88 km
37 km
Apr 14, 2000
10 km SSW of Tanabe, Japan
M5.1
129 km
35 km
Apr 26, 2007
15 km ESE of Niihama, Japan
M5.1
100 km
50 km
Jan 16, 1995
20 km SW of Akashi, Japan
M5.0
49 km
10 km
Jul 5, 2011
12 km NNW of Gob?, Japan
M5.0
93 km
16 km
Oct 13, 1995
10 km ESE of Akashi, Japan
M4.9
76 km
18 km
Aug 22, 1994
39 km S of Anan, Japan
M4.9
103 km
38 km
Sep 28, 1990
24 km NNW of Kariya, Japan
M4.9
54 km
26 km
Jun 16, 2022
5 km S of Komatsushimach?, Japan
M4.9
62 km
40 km
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Hurricane History
47 hurricanes (Category 1+) recorded within 500 km since 1980.
Strongest on record: Category 3.
Year
Name
Category
Max Wind
Closest
2023
Lan
Category 2
81 mph
154 km
2018
Jebi
Category 3
98 mph
58 km
2018
Trami
Category 1
92 mph
132 km
2018
Cimaron
Category 1
92 mph
40 km
2018
Jongdari
Category 1
75 mph
257 km
2017
Lan
Category 2
104 mph
292 km
2017
Noru
Category 1
69 mph
89 km
2016
Malakas
Category 1
86 mph
199 km
2015
Nangka
Category 1
81 mph
162 km
2014
Phanfone
Category 2
92 mph
191 km
2014
Halong
Category 1
81 mph
187 km
2012
Jelawat
Category 1
92 mph
214 km
2011
Roke
Category 3
98 mph
226 km
2011
Ma-on
Category 1
86 mph
99 km
2009
Melor
Category 1
86 mph
217 km
2008
Sinlaku
Category 1
75 mph
193 km
2007
Usagi
Category 2
92 mph
254 km
2007
Man-yi
Category 1
81 mph
240 km
2005
Nabi
Category 1
75 mph
283 km
2004
Songda
Category 2
86 mph
213 km
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Tsunami History
10 tsunamis recorded within 500 km.
Highest wave on record: 25.7 m (84 ft).
Year
Location
Cause
Max Wave
Deaths
Distance
1707
NANKAIDO
Earthquake
25.7 m
5,000
147 km
1927
SW. HONSHU ISLAND
Eruption + Earthquake
11.3 m
3,022
146 km
1711
SEIONAIKAI, JAPAN
Earthquake
2.0 m
1,000
33 km
1510
OSAKA BAY
Earthquake
2.0 m
—
102 km
1808
E. AWA, TOKUSHIMA PREFECTURE
Earthquake
1.5 m
—
77 km
1995
KOBE, JAPAN
Earthquake
0.3 m
6,434
72 km
1791
OASAKA BAY
Earthquake
—
—
101 km
1498
NANKAIDO
Earthquake
—
—
135 km
1331
OFF TANABE, WAKAYAMA PREFECTURE
Earthquake
—
—
118 km
745
OSAKA BAY, JAPAN
Earthquake
—
—
93 km
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
1 volcano within 200 km.
Closest: Sanbesan (171 km).
Name
Type
Elevation
Last Eruption
Distance
Sanbesan
Stratovolcano
1,126 m (3,694 ft)
650
171 km
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
Month
Avg Temperature
Precipitation
Summary
January
40°F (4°C)
1.5 in
Coldest
February
40°F (4°C)
2.1 in
March
45°F (7°C)
3.5 in
April
55°F (13°C)
5.6 in
May
63°F (17°C)
5.8 in
June
70°F (21°C)
8.8 in
July
78°F (25°C)
7.2 in
August
80°F (27°C)
4.8 in
Warmest
September
73°F (23°C)
9.3 in
Wettest
October
63°F (17°C)
4.6 in
November
53°F (12°C)
3.0 in
December
44°F (7°C)
1.2 in
Driest
Horikoshi has a seasonal temperature swing of 40°F / from 40°F in January to 80°F in August. Total annual precipitation is 57.4 inches, with September being the wettest month (9.3") and December the driest (1.2").