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Weather & Climate in Hiroo, Japan
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Hiroo has a cool climate with an average annual temperature of 42°F (5°C). Winters average 17°F in January while summers reach 62°F in July. The area gets 255 sunny days per year, above the national average. Annual precipitation totals 44.8 inches. The area receives 9.0 inches of snow annually. The city sits at an elevation of 197 feet.
Temperature
17°F Jan (-8°C)
62°F Jul (17°C)
| Annual Average | 41.6°F |
| 23% below US avg | |
| January Average | 17°F (-8°C) |
| July Average | 62°F (17°C) |
| Sunny Days | 255 days/yr |
Geography
| Elevation | 197 ft (60 m) |
| Area | 476.0 sq mi (1,232.8 km²) |
| Population Density | 15/sq mi |
| Coordinates | 42.2823°N, 143.2977°W |
| Timezone | Asia/Tokyo |
Precipitation & Snow
Air Quality
Earthquake History
1,655 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M8.2.
| Sep 25, 2003 | 2003 Tokachi-Oki Earthquake | M8.2 | 73 km | 27 km |
| Jan 15, 1993 | 52 km NE of Otofuke, Japan | M7.6 | 118 km | 102 km |
| Sep 25, 2003 | 119 km ESE of Shizunai-furukawach?, Japan | M7.4 | 62 km | 33 km |
| Feb 2, 2013 | 18 km SSW of Obihiro, Japan | M6.9 | 57 km | 107 km |
| Jan 14, 2016 | 52 km SE of Shizunai-furukawach?, Japan | M6.7 | 55 km | 46 km |
| Oct 8, 2003 | 39 km SSE of Kushiro, Japan | M6.7 | 112 km | 32 km |
| Sep 29, 2003 | 58 km S of Kushiro, Japan | M6.5 | 91 km | 25 km |
| Nov 26, 1991 | 33 km SSE of Shizunai-furukawach?, Japan | M6.4 | 69 km | 56 km |
| Jun 5, 2009 | 105 km ESE of Shizunai-furukawach?, Japan | M6.4 | 52 km | 29 km |
| Jan 24, 2018 | 99 km ENE of Misawa, Japan | M6.3 | 150 km | 31 km |
| Jan 18, 2005 | 40 km E of Kushiro, Japan | M6.3 | 148 km | 42 km |
| Jul 12, 1992 | 70 km ENE of Mutsu, Japan | M6.2 | 139 km | 64 km |
| Jun 11, 2023 | 20 km WSW of Biratori, Japan | M6.2 | 118 km | 121 km |
| May 12, 1999 | 44 km W of Kushiro, Japan | M6.2 | 94 km | 103 km |
| Jun 8, 2015 | 74 km ENE of Mutsu, Japan | M6.1 | 132 km | 42 km |
| Apr 11, 2004 | 38 km E of Kushiro, Japan | M6.1 | 144 km | 42 km |
| Jan 15, 1993 | 17 km W of Kushiro, Japan | M6.1 | 105 km | 112 km |
| Mar 25, 1993 | 108 km ESE of Shizunai-furukawach?, Japan | M6.0 | 55 km | 34 km |
| Feb 20, 1997 | 61 km SSE of Shizunai-furukawach?, Japan | M6.0 | 66 km | 33 km |
| Sep 26, 2003 | 110 km S of Kushiro, Japan | M6.0 | 110 km | 33 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 |
| 2002 | Higos | Category 1 | 69 mph | 254 km |
| 2000 | Sonamu | Category 1 | 58 mph | 260 km |
| 1998 | Vicki | Category 1 | 58 mph | 286 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Tsunami History
10 tsunamis recorded within 500 km. Highest wave on record: 6.5 m (21 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1952 | SE. HOKKAIDO ISLAND | Earthquake | 6.5 m | 33 | 48 km |
| 2003 | HOKKAIDO ISLAND | Earthquake | 4.4 m | 2 | 73 km |
| 1982 | HOKKAIDO ISLAND | Earthquake | 1.3 m | 110 | 78 km |
| 1943 | SE. HOKKAIDO ISLAND | Earthquake | 0.6 m | — | 120 km |
| 1968 | OFF COAST OF HONSHU ISLAND | Earthquake | 0.6 m | — | 100 km |
| 1971 | JAPAN TRENCH | Earthquake | 0.5 m | — | 100 km |
| 1931 | SANRIKU | Earthquake | 0.4 m | — | 137 km |
| 1952 | SE. HOKKAIDO ISLAND | Earthquake | 0.3 m | — | 69 km |
| 1962 | SE. HOKKAIDO ISLAND | Earthquake | 0.1 m | — | 50 km |
| 2008 | HOKKAIDO ISLAND | Earthquake | 0.1 m | 6 | 58 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
9 volcanoes within 200 km. Closest: Maruyama (128 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Maruyama | Stratovolcano(es) | 2,013 m (6,604 ft) | 1898 | 128 km |
| Akan | Caldera | 1,499 m (4,918 ft) | 2008 | 136 km |
| Tokachidake | Stratovolcano(es) | 2,077 m (6,814 ft) | 2004 | 136 km |
| Taisetsuzan | Stratovolcano(es) | 2,291 m (7,516 ft) | 1739 | 158 km |
| Shikotsu | Caldera | 1,320 m (4,331 ft) | 1979 | 164 km |
| Kussharo | Caldera | 574 m (1,883 ft) | 1320 | 174 km |
| Mashu | Caldera | 857 m (2,812 ft) | 1080 | 177 km |
| Kuttara | Stratovolcano(es) | 549 m (1,801 ft) | 1820 | 177 km |
| Esan | Lava dome(s) | 618 m (2,028 ft) | 1874 | 184 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 17°F (-8°C) | 2.1 in | Coldest |
| February | 19°F (-8°C) | 1.6 in | Driest |
| March | 27°F (-3°C) | 2.9 in | |
| April | 39°F (4°C) | 3.4 in | |
| May | 48°F (9°C) | 3.8 in | |
| June | 55°F (13°C) | 3.9 in | |
| July | 62°F (17°C) | 4.8 in | |
| August | 65°F (19°C) | 4.9 in | Warmest |
| September | 59°F (15°C) | 6.7 in | Wettest |
| October | 48°F (9°C) | 4.9 in | |
| November | 36°F (2°C) | 3.5 in | |
| December | 24°F (-4°C) | 2.4 in |
Hiroo has a seasonal temperature swing of 49°F / from 17°F in January to 65°F in August. Total annual precipitation is 44.8 inches, with September being the wettest month (6.7") and February the driest (1.6").