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Weather & Climate in Cowichan Valley I, BC
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Cowichan Valley I has a cool climate with an average annual temperature of 44°F (7°C). Winters average 34°F in January while summers reach 57°F in July. The area gets 191 sunny days per year. Annual precipitation totals 80.4 inches (wetter than the 38-inch national average). The area receives 33.9 inches of snow annually, a moderate snowfall amount. The city sits at an elevation of 823 feet.
Temperature
34°F Jan (1°C)
57°F Jul (14°C)
| Annual Average | 44.3°F |
| 18% below US avg | |
| January Average | 34°F (1°C) |
| July Average | 57°F (14°C) |
| Sunny Days | 191 days/yr |
Geography
| Elevation | 823 ft (251 m) |
| Area | 195.2 sq mi (505.5 km²) |
| Population Density | 7/sq mi |
| Coordinates | 48.8425°N, 124.0831°W |
| Timezone | America/Vancouver |
Precipitation & Snow
Air Quality
Earthquake History
337 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M5.0.
| Apr 14, 1990 | 4 km ENE of Deming, Washington | M5.0 | 141 km | 12 km |
| Apr 25, 2003 | 26 km W of Brinnon, Washington | M4.8 | 144 km | 51 km |
| Feb 21, 2025 | 28 km W of Squamish, Canada | M4.8 | 102 km | 10 km |
| Jan 8, 2015 | 19 km E of Tofino, Canada | M4.8 | 120 km | 25 km |
| Jan 24, 2020 | 46 km WNW of Neah Bay, Washington | M4.5 | 87 km | 10 km |
| Mar 3, 2025 | 2025 Orcas Island, Washington | M4.5 | 97 km | 16 km |
| Jun 24, 1997 | 19 km SSW of Gibsons, Canada | M4.4 | 55 km | 3 km |
| Apr 2, 1990 | 2 km ENE of Deming, Washington | M4.3 | 139 km | 0 km |
| Feb 19, 1991 | 31 km E of Squamish, Canada | M4.3 | 137 km | 5 km |
| Jan 23, 2001 | 9 km NNW of Ucluelet, Canada | M4.3 | 111 km | 10 km |
| Feb 22, 1996 | 31 km NNE of South Pender Harbour, Canada | M4.1 | 118 km | 2 km |
| Sep 21, 2002 | 9 km SW of Friday Harbor, Washington | M4.1 | 81 km | 23 km |
| Dec 25, 1999 | 40 km SW of Ucluelet, Canada | M4.0 | 133 km | 30 km |
| Apr 3, 1990 | 3 km ENE of Deming, Washington | M4.0 | 140 km | 1 km |
| Apr 14, 1990 | 2 km ESE of Deming, Washington | M4.0 | 139 km | 3 km |
| Dec 27, 2012 | 12 km E of North Saanich, Canada | M4.0 | 65 km | 54 km |
| Sep 26, 2024 | 12 km E of Saanichton, Canada | M4.0 | 68 km | 52 km |
| Jul 1, 2009 | 4 km SE of Coupeville, Washington | M4.0 | 128 km | 58 km |
| Apr 7, 2001 | 36 km NNW of Neah Bay, Washington | M3.9 | 51 km | 32 km |
| Nov 20, 1994 | 26 km N of Ucluelet, Canada | M3.9 | 112 km | 38 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tsunami History
2 tsunamis recorded within 500 km. Highest wave on record: 9.0 m (30 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1946 | BRITISH COLUMBIA | Eruption + Earthquake | 9.0 m | 1 | 129 km |
| 1891 | WASHINGTON | Eruption + Earthquake | 2.4 m | — | 103 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
4 volcanoes within 200 km. Closest: Garibaldi (137 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Garibaldi | Stratovolcano | 2,678 m (8,786 ft) | -8060 | 137 km |
| Garibaldi Lake | Volcanic field | 2,316 m (7,598 ft) | Unknown | 144 km |
| Cayley Volcanic Field | Volcanic field | 2,375 m (7,792 ft) | Unknown | 153 km |
| Baker | Stratovolcano(es) | 3,285 m (10,778 ft) | 1880 | 166 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 34°F (1°C) | 12.6 in | |
| February | 36°F (2°C) | 8.9 in | |
| March | 37°F (3°C) | 8.0 in | |
| April | 41°F (5°C) | 5.4 in | |
| May | 47°F (8°C) | 3.5 in | |
| June | 52°F (11°C) | 2.7 in | |
| July | 57°F (14°C) | 1.7 in | Driest |
| August | 58°F (15°C) | 2.2 in | Warmest |
| September | 54°F (12°C) | 2.4 in | |
| October | 46°F (8°C) | 7.7 in | |
| November | 38°F (3°C) | 13.0 in | Wettest |
| December | 33°F (1°C) | 12.4 in | Coldest |
Cowichan Valley I has a seasonal temperature swing of 25°F / from 33°F in December to 58°F in August. Total annual precipitation is 80.4 inches, with November being the wettest month (13.0") and July the driest (1.7").