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Weather & Climate in Cowichan Valley B, BC
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Cowichan Valley B experiences four distinct seasons with an average annual temperature of 49°F (9°C). Winters average 40°F in January while summers reach 59°F in July / relatively mild seasonal variation. The area gets 140 sunny days per year, below the national average of 205. Annual precipitation totals 126.0 inches (wetter than the 38-inch national average).
Temperature
40°F Jan (4°C)
59°F Jul (15°C)
| Annual Average | 48.8°F |
| 10% below US avg | |
| January Average | 40°F (4°C) |
| July Average | 59°F (15°C) |
| Sunny Days | 140 days/yr |
Geography
| Area | 118.2 sq mi (306.1 km²) |
| Population Density | 76/sq mi |
| Coordinates | 49.0487°N, 125.7367°W |
| Timezone | America/Vancouver |
Precipitation & Snow
Air Quality
Earthquake History
127 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M6.4.
| Jul 19, 2004 | 62 km SW of Vernon, Canada | M6.4 | 110 km | 24 km |
| Sep 9, 2011 | 66 km SW of Vernon, Canada | M6.4 | 100 km | 22 km |
| Jul 15, 2004 | 51 km SW of Vernon, Canada | M5.9 | 108 km | 19 km |
| Jan 3, 1994 | 44 km SW of Vernon, Canada | M5.7 | 106 km | 19 km |
| Aug 4, 2013 | 86 km WSW of Vernon, Canada | M5.5 | 140 km | 10 km |
| Feb 16, 1990 | 131 km W of Tofino, Canada | M5.4 | 144 km | 10 km |
| Jan 8, 2015 | 19 km E of Tofino, Canada | M4.8 | 15 km | 25 km |
| Mar 18, 1996 | 39 km WSW of Vernon, Canada | M4.8 | 125 km | 10 km |
| Feb 4, 2012 | 128 km WSW of Tofino, Canada | M4.8 | 139 km | 14 km |
| May 10, 2020 | 106 km WSW of Vernon, Canada | M4.8 | 148 km | 10 km |
| Feb 16, 2012 | 124 km W of Tofino, Canada | M4.7 | 137 km | 10 km |
| May 2, 2001 | 50 km W of Tofino, Canada | M4.7 | 64 km | 10 km |
| Feb 23, 1991 | 67 km SSW of Vernon, Canada | M4.6 | 91 km | 34 km |
| Aug 1, 2000 | 40 km NNW of Tofino, Canada | M4.6 | 57 km | 41 km |
| Jan 24, 2020 | 46 km WNW of Neah Bay, Washington | M4.5 | 69 km | 10 km |
| Jul 20, 2004 | 89 km SW of Vernon, Canada | M4.5 | 118 km | 27 km |
| Oct 8, 1996 | 137 km W of Tofino, Canada | M4.4 | 149 km | 10 km |
| Feb 18, 1990 | 66 km WSW of Tofino, Canada | M4.4 | 75 km | 33 km |
| Sep 1, 1998 | 136 km W of Tofino, Canada | M4.4 | 149 km | 10 km |
| Oct 29, 2012 | 136 km W of Tofino, Canada | M4.4 | 149 km | 10 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 | 109 km |
| 1958 | RIPPLE ROCK, BC | Earthquake + Landslide | 0.5 m | — | 119 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 40°F (4°C) | 17.7 in | Coldest |
| February | 41°F (5°C) | 13.7 in | |
| March | 43°F (6°C) | 13.1 in | |
| April | 46°F (8°C) | 9.9 in | |
| May | 51°F (11°C) | 6.0 in | |
| June | 55°F (13°C) | 4.8 in | |
| July | 59°F (15°C) | 2.8 in | Driest |
| August | 60°F (16°C) | 3.4 in | Warmest |
| September | 57°F (14°C) | 5.2 in | |
| October | 50°F (10°C) | 14.1 in | |
| November | 44°F (7°C) | 18.4 in | Wettest |
| December | 40°F (4°C) | 17.1 in |
Cowichan Valley B has a seasonal temperature swing of 20°F / from 40°F in January to 60°F in August. Total annual precipitation is 126.0 inches, with November being the wettest month (18.4") and July the driest (2.8").