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Weather & Climate in Saku, Japan
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Saku experiences four distinct seasons with an average annual temperature of 51°F (11°C). Winters average 29°F in January while summers reach 72°F in July. The area gets 257 sunny days per year, above the national average. Annual precipitation totals 43.4 inches. The area receives 4.1 inches of snow annually. The city sits at an elevation of 2,244 feet.
Temperature
29°F Jan (-2°C)
72°F Jul (22°C)
| Annual Average | 50.9°F |
| 6% below US avg | |
| January Average | 29°F (-2°C) |
| July Average | 72°F (22°C) |
| Sunny Days | 257 days/yr |
Geography
| Elevation | 2,244 ft (684 m) |
| Area | 163.5 sq mi (423.5 km²) |
| Population Density | 606/sq mi |
| Coordinates | 36.2167°N, 138.4833°W |
| Timezone | Asia/Tokyo |
Precipitation & Snow
Air Quality
Earthquake History
848 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M6.6.
| Jul 16, 2007 | 20 km NNW of Kashiwazaki, Japan | M6.6 | 147 km | 12 km |
| Mar 11, 2011 | 13 km E of Arai, Japan | M6.2 | 89 km | 9 km |
| Mar 15, 2011 | 6 km NNW of Fujinomiya, Japan | M6.0 | 105 km | 9 km |
| Jan 15, 2007 | 15 km WSW of Heda, Japan | M5.9 | 148 km | 170 km |
| Feb 25, 2013 | 29 km NE of Numata, Japan | M5.8 | 98 km | 10 km |
| Apr 16, 2011 | 6 km ENE of Tanuma, Japan | M5.8 | 106 km | 77 km |
| Mar 11, 2011 | eastern Honshu, Japan | M5.7 | 82 km | 12 km |
| Jul 16, 2007 | 16 km NNW of Kashiwazaki, Japan | M5.7 | 143 km | 15 km |
| Mar 6, 1996 | 13 km NNE of Gotenba, Japan | M5.6 | 98 km | 33 km |
| Nov 9, 2013 | 3 km WSW of Moriya, Japan | M5.6 | 138 km | 64 km |
| Mar 15, 2012 | 3 km ENE of ?me, Japan | M5.5 | 85 km | 104 km |
| Apr 11, 2011 | 8 km WSW of Iiyama, Japan | M5.5 | 68 km | 17 km |
| Feb 15, 2005 | 2 km NNW of Iwatsuki, Japan | M5.5 | 111 km | 46 km |
| Aug 15, 1998 | 22 km WSW of Hotaka, Japan | M5.5 | 76 km | 10 km |
| Dec 21, 1996 | 3 km E of Sugito, Japan | M5.5 | 117 km | 45 km |
| Jul 15, 2011 | 5 km NE of Sakai, Japan | M5.5 | 123 km | 89 km |
| Aug 28, 1998 | 14 km E of Kawasaki, Japan | M5.4 | 148 km | 76 km |
| May 16, 2016 | 6 km NE of Kasukabe, Japan | M5.4 | 121 km | 45 km |
| Jan 4, 2001 | 20 km WSW of Shiozawa, Japan | M5.3 | 86 km | 21 km |
| Oct 5, 2011 | 24 km W of ?machi, Japan | M5.3 | 85 km | 10 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Hurricane History
30 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 3.
| Year | Name | Category | Max Wind | Closest |
| 2019 | Faxai | Category 3 | 98 mph | 150 km |
| 2019 | Hagibis | Category 2 | 92 mph | 107 km |
| 2018 | Jebi | Category 1 | 86 mph | 207 km |
| 2018 | Shanshan | Category 1 | 75 mph | 284 km |
| 2018 | Jongdari | Category 1 | 81 mph | 225 km |
| 2016 | Mindulle | Category 1 | 75 mph | 232 km |
| 2014 | Phanfone | Category 1 | 81 mph | 147 km |
| 2011 | Roke | Category 2 | 92 mph | 73 km |
| 2007 | Fitow | Category 1 | 81 mph | 94 km |
| 2005 | Mawar | Category 2 | 81 mph | 154 km |
| 2004 | Ma-on | Category 3 | 92 mph | 135 km |
| 2004 | Chaba | Category 1 | 69 mph | 252 km |
| 2003 | Etau | Category 1 | 58 mph | 217 km |
| 2002 | Higos | Category 2 | 86 mph | 132 km |
| 2001 | Danas | Category 1 | 81 mph | 136 km |
| 2000 | Kirogi | Category 1 | 86 mph | 225 km |
| 1998 | Vicki | Category 2 | 86 mph | 103 km |
| 1998 | Zeb | Category 1 | 58 mph | 251 km |
| 1998 | Stella | Category 1 | 69 mph | 109 km |
| 1996 | Violet | Category 1 | 81 mph | 257 km |
Source: NOAA IBTrACS (Category 1+, 1980-2026).
Tsunami History
11 tsunamis recorded within 500 km. Highest wave on record: 0.2 m (1 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1987 | HONSHU ISLAND | Earthquake | 0.2 m | - | 148 km |
| 1855 | TOKAIDO | Earthquake | - | 6,757 | 134 km |
| 1751 | NW. HONSHU ISLAND | Eruption + Earthquake | - | 2,100 | 115 km |
| 1633 | SAGAMI BAY | Earthquake | - | 150 | 130 km |
| 1614 | NIIGATA PREFECTURE | Earthquake | - | - | 149 km |
| 1448 | SADO, JAPAN | Earthquake | - | - | 145 km |
| 1257 | SAGAMI BAY, JAPAN | Earthquake | - | - | 146 km |
| 1241 | KAMAKURA, SAGAMI BAY | Earthquake | - | - | 140 km |
| 887 | NIIGATA | Earthquake | - | 2,000 | 147 km |
| 863 | NW. HONSHU ISLAND | Eruption + Earthquake | - | - | 107 km |
| 818 | TOKAIDO | Eruption + Earthquake | - | - | 135 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
15 volcanoes within 200 km. Closest: Yokodake (21 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Yokodake | Stratovolcano(es) | 2,480 m (8,136 ft) | 1200 | 21 km |
| Asamayama | Complex | 2,568 m (8,425 ft) | 2019 | 21 km |
| Harunasan | Stratovolcano | 1,449 m (4,754 ft) | 550 | 44 km |
| Kusatsu-Shiranesan | Stratovolcano(es) | 2,165 m (7,103 ft) | 2018 | 45 km |
| Shiga | Shield(s) | 2,041 m (6,696 ft) | Unknown | 53 km |
| Akagisan | Stratovolcano | 1,828 m (5,997 ft) | Unknown | 74 km |
| Yakedake | Stratovolcano(es) | 2,455 m (8,054 ft) | 1995 | 80 km |
| Myokosan | Stratovolcano | 2,454 m (8,051 ft) | -750 | 82 km |
| Washiba-Kumonotaira | Shield(s) | 2,924 m (9,593 ft) | Unknown | 83 km |
| Norikuradake | Stratovolcano(es) | 3,026 m (9,928 ft) | -50 | 84 km |
| Niigata-Yakeyama | Lava dome | 2,400 m (7,874 ft) | 1998 | 88 km |
| Midagahara | Stratovolcano | 2,621 m (8,599 ft) | 1839 | 89 km |
| Ontakesan | Complex | 3,067 m (10,062 ft) | 2014 | 97 km |
| Fujisan | Stratovolcano | 3,776 m (12,388 ft) | 1708 | 98 km |
| Nikko-Shiranesan | Shield | 2,578 m (8,458 ft) | 1952 | 103 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 29°F (-2°C) | 1.3 in | Coldest |
| February | 30°F (-1°C) | 1.8 in | |
| March | 37°F (3°C) | 2.6 in | |
| April | 49°F (9°C) | 3.2 in | |
| May | 58°F (14°C) | 3.8 in | |
| June | 65°F (18°C) | 6.3 in | |
| July | 72°F (22°C) | 6.0 in | |
| August | 74°F (23°C) | 5.2 in | Warmest |
| September | 65°F (19°C) | 6.4 in | Wettest |
| October | 54°F (12°C) | 3.9 in | |
| November | 44°F (7°C) | 1.9 in | |
| December | 35°F (1°C) | 1.0 in | Driest |
Saku has a seasonal temperature swing of 45°F / from 29°F in January to 74°F in August. Total annual precipitation is 43.4 inches, with September being the wettest month (6.4") and December the driest (1.0").