Weather & Climate in Gamō, Japan

Temperature, precipitation, air quality, natural hazards, and monthly weather data.

Gamō enjoys a temperate climate with an average annual temperature of 62°F (16°C). Winters average 39°F in January while summers reach 82°F in July. The area gets 294 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 51.7 inches (wetter than the 38-inch national average). The area receives 1.3 inches of snow annually. The city sits at an elevation of 23 feet.

Temperature

39°F Jan (4°C) 82°F Jul (28°C)

Annual Average	61.5°F
	14% above US avg
January Average	39°F (4°C)
July Average	82°F (28°C)
Sunny Days	294 days/yr

Geography

Elevation	23 ft (7 m)
Area	24.8 sq mi (64.3 km²)
Population Density	373/sq mi
Coordinates	35.8651°N, 139.8019°W
Timezone	Asia/Tokyo

Precipitation & Snow

Annual Rainfall 51.7"

36% above US avg

Snowfall 1.3"

Wettest Month (Sep) 7.72"

Driest Month (Jan) 1.38"

Air Quality

Earthquake History

2,692 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M7.9.

Mar 11, 2011	47 km E of ?arai, Japan	M7.9	126 km	43 km
Apr 11, 2011	17 km SSW of Ishikawa, Japan	M6.6	137 km	11 km
Feb 20, 1990	28 km E of Shimoda, Japan	M6.4	138 km	14 km
Jun 1, 1990	near the east coast of Honshu, Japan	M6.3	62 km	67 km
Sep 11, 1996	23 km SSE of Hasaki, Japan	M6.2	109 km	55 km
Jun 3, 2000	6 km SE of Narut?, Japan	M6.2	69 km	62 km
Apr 21, 2011	6 km WNW of T?gane, Japan	M6.2	56 km	43 km
Apr 11, 2011	23 km SE of T?gane, Japan	M6.2	86 km	15 km
May 26, 2023	12 km SE of Narutō, Japan	M6.1	76 km	42 km
Sep 15, 2011	68 km E of ?arai, Japan	M6.1	145 km	28 km
Aug 5, 1990	43 km E of ?arai, Japan	M6.1	124 km	27 km
Apr 3, 2004	37 km ESE of Hitachi, Japan	M6.0	125 km	31 km
Jul 20, 2000	31 km ESE of Hitachi, Japan	M6.0	128 km	47 km
Jan 9, 1995	48 km ENE of Hasaki, Japan	M6.0	139 km	33 km
Mar 15, 2011	6 km NNW of Fujinomiya, Japan	M6.0	129 km	9 km
Mar 11, 2011	4 km ESE of Hasaki, Japan	M6.0	98 km	48 km
May 4, 2014	31 km ESE of It?, Japan	M6.0	112 km	153 km
Aug 6, 1991	19 km E of Hasaki, Japan	M6.0	113 km	29 km
Mar 14, 2012	5 km SE of Asahi, Japan	M6.0	83 km	10 km
Apr 12, 2011	8 km WSW of Ishikawa, Japan	M5.9	147 km	11 km

Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.

Hurricane History

35 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 3.

Year	Name	Category	Max Wind	Closest
2024	Ampil	Category 3	98 mph	217 km
2024	Jebi	Category 1	75 mph	248 km
2019	Faxai	Category 3	98 mph	42 km
2019	Hagibis	Category 2	92 mph	47 km
2018	Jongdari	Category 2	86 mph	211 km
2018	Shanshan	Category 1	81 mph	167 km
2016	Lionrock	Category 1	75 mph	252 km
2016	Mindulle	Category 1	75 mph	176 km
2014	Phanfone	Category 1	81 mph	166 km
2011	Roke	Category 2	92 mph	54 km
2009	Krovanh	Category 1	69 mph	263 km
2007	Fitow	Category 1	81 mph	62 km
2005	Saola	Category 2	86 mph	276 km
2005	Mawar	Category 2	81 mph	49 km
2004	Ma-on	Category 3	92 mph	30 km
2003	Choi-wan	Category 3	81 mph	293 km
2002	Higos	Category 2	86 mph	10 km
2001	Vipa	Category 1	63 mph	267 km
2001	Danas	Category 1	81 mph	11 km
2000	Sonamu	Category 1	63 mph	296 km

Source: NOAA IBTrACS (Category 1+, 1980-2026).

Tsunami History

19 tsunamis recorded within 500 km. Highest wave on record: 13.0 m (43 ft).

Year	Location	Cause	Max Wave	Deaths	Distance
1923	SAGAMI BAY	Earthquake	13.0 m	105,385	89 km
1703	OFF SW BOSO PENINSULA	Earthquake	11.7 m	5,233	130 km
1495	KAMAKURA, SAGAMI BAY, TOKAIDO	Earthquake	5.0 m	200	89 km
1732	KUJUKURI BEACH, JAPAN	Earthquake	2.0 m	-	117 km
1670	BOSO, JAPAN	Earthquake	2.0 m	-	116 km
1433	OFF IZU-OSHIMA	Earthquake	2.0 m	-	111 km
1980	HONSHU ISLAND	Earthquake	0.6 m	-	130 km
1978	TOKAIDO	Earthquake	0.4 m	25	127 km
1923	RYUKYU ISLANDS	Earthquake	0.3 m	-	113 km
1896	KASHIMA, JAPAN	Earthquake	0.3 m	-	129 km
1990	JAPAN	Earthquake	0.2 m	-	138 km
1855	TOKAIDO	Earthquake	-	6,757	24 km
1782	ODAWARA, SAGAMI BAY	Eruption + Earthquake	-	-	86 km
1642	BOSO, JAPAN	Earthquake	-	-	103 km
1633	SAGAMI BAY	Earthquake	-	150	92 km
1602	BOSO, JAPAN	Eruption + Earthquake	-	-	106 km
1257	SAGAMI BAY, JAPAN	Earthquake	-	-	79 km
1241	KAMAKURA, SAGAMI BAY	Earthquake	-	-	82 km
818	TOKAIDO	Eruption + Earthquake	-	-	87 km

Source: NOAA/NCEI Historical Tsunami Database.

Nearby Volcanoes

15 volcanoes within 200 km. Closest: Akagisan (95 km).

Name	Type	Elevation	Last Eruption	Distance
Akagisan	Stratovolcano	1,828 m (5,997 ft)	Unknown	95 km
Hakoneyama	Complex	1,438 m (4,718 ft)	2015	100 km
Nantaisan	Stratovolcano	2,486 m (8,156 ft)	-9540	104 km
Omanago Group	Lava dome(s)	2,341 m (7,680 ft)	-3050	107 km
Harunasan	Stratovolcano	1,449 m (4,754 ft)	550	109 km
Nikko-Shiranesan	Shield	2,578 m (8,458 ft)	1952	111 km
Fujisan	Stratovolcano	3,776 m (12,388 ft)	1708	112 km
Takaharayama	Stratovolcano	1,795 m (5,889 ft)	-4570	115 km
Izu-Tobu	Pyroclastic cone(s)	1,406 m (4,613 ft)	1989	125 km
Asamayama	Complex	2,568 m (8,425 ft)	2019	130 km
Hiuchigatake	Stratovolcano	2,356 m (7,730 ft)	1544	130 km
Izu-Oshima	Stratovolcano	758 m (2,487 ft)	1990	132 km
Yokodake	Stratovolcano(es)	2,480 m (8,136 ft)	1200	136 km
Nasudake	Stratovolcano(es)	1,915 m (6,283 ft)	1963	141 km
Kusatsu-Shiranesan	Stratovolcano(es)	2,165 m (7,103 ft)	2018	142 km

Source: Smithsonian Institution Global Volcanism Program (GVP).

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	39°F (4°C)	1.4 in	Coldest, Driest
February	41°F (5°C)	2.1 in
March	46°F (8°C)	3.4 in
April	57°F (14°C)	4.3 in
May	65°F (18°C)	4.8 in
June	71°F (21°C)	6.5 in
July	82°F (28°C)	6.0 in	Warmest
August	80°F (27°C)	6.1 in
September	73°F (23°C)	7.7 in	Wettest
October	63°F (17°C)	6.3 in
November	53°F (12°C)	3.0 in
December	44°F (7°C)	1.4 in

Gamō has a seasonal temperature swing of 43°F / from 39°F in January to 82°F in July. Total annual precipitation is 53.1 inches, with September being the wettest month (7.7") and January the driest (1.4").

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