All Countries
Weather & Climate in Sliammon, BC
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Sliammon experiences four distinct seasons with an average annual temperature of 48°F (9°C). Winters average 37°F in January while summers reach 62°F in July. The area gets 247 sunny days per year, above the national average. Annual precipitation totals 48.9 inches (wetter than the 38-inch national average). The city sits at an elevation of 33 feet.
Temperature
37°F Jan (3°C)
62°F Jul (17°C)
| Annual Average | 48.2°F |
| 11% below US avg | |
| January Average | 37°F (3°C) |
| July Average | 62°F (17°C) |
| Sunny Days | 247 days/yr |
Geography
| Elevation | 33 ft (10 m) |
| Area | 3.1 sq mi (8.1 km²) |
| Population Density | 254/sq mi |
| Coordinates | 49.8972°N, 124.6079°W |
| Timezone | America/Vancouver |
Precipitation & Snow
Air Quality
Earthquake History
68 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.8.
| Jan 8, 2015 | 19 km E of Tofino, Canada | M4.8 | 110 km | 25 km |
| Feb 21, 2025 | 28 km W of Squamish, Canada | M4.8 | 80 km | 10 km |
| Aug 1, 2000 | 40 km NNW of Tofino, Canada | M4.6 | 119 km | 41 km |
| Jun 24, 1997 | 19 km SSW of Gibsons, Canada | M4.4 | 102 km | 3 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 | 120 km | 10 km |
| Feb 22, 1996 | 31 km NNE of South Pender Harbour, Canada | M4.1 | 51 km | 2 km |
| May 8, 1999 | 17 km NW of Tofino, Canada | M4.0 | 127 km | 33 km |
| Apr 7, 2001 | 36 km NNW of Neah Bay, Washington | M3.9 | 135 km | 32 km |
| Nov 20, 1994 | 26 km N of Ucluelet, Canada | M3.9 | 104 km | 38 km |
| May 16, 2001 | 35 km NE of Tofino, Canada | M3.9 | 89 km | 10 km |
| Feb 18, 2017 | 103 km NE of Campbell River, Canada | M3.9 | 99 km | 8 km |
| Jun 19, 2017 | 21 km SSW of Vernon, Canada | M3.9 | 136 km | 10 km |
| Sep 5, 2017 | 9 km NNE of Ucluelet, Canada | M3.8 | 116 km | 33 km |
| Oct 4, 2024 | 22 km NNE of Ganges, Canada | M3.6 | 129 km | 61 km |
| Aug 17, 2011 | 37 km NNW of Tofino, Canada | M3.5 | 112 km | 45 km |
| Jun 13, 1997 | 19 km SSW of Gibsons, Canada | M3.4 | 102 km | 4 km |
| Feb 15, 2015 | 30 km NNE of Sechelt, Canada | M3.4 | 75 km | 3 km |
| Oct 20, 2001 | 40 km NNW of Tofino, Canada | M3.2 | 118 km | 9 km |
| Sep 30, 1996 | 3 km SSE of Tofino, Canada | M3.2 | 127 km | 30 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tsunami History
3 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 | 23 km |
| 1958 | RIPPLE ROCK, BC | Earthquake + Landslide | 0.5 m | — | 54 km |
| 2020 | ELLIOT CREEK, BC | Meteorological | — | — | 119 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
5 volcanoes within 200 km. Closest: Cayley Volcanic Field (98 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Cayley Volcanic Field | Volcanic field | 2,375 m (7,792 ft) | Unknown | 98 km |
| Meager | Complex | 2,680 m (8,793 ft) | -410 | 113 km |
| Garibaldi Lake | Volcanic field | 2,316 m (7,598 ft) | Unknown | 115 km |
| Garibaldi | Stratovolcano | 2,678 m (8,786 ft) | -8060 | 115 km |
| Bridge River Cones | Volcanic field | 2,500 m (8,202 ft) | Unknown | 132 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 37°F (3°C) | 6.2 in | Coldest |
| February | 39°F (4°C) | 4.6 in | |
| March | 41°F (5°C) | 4.3 in | |
| April | 46°F (8°C) | 3.2 in | |
| May | 52°F (11°C) | 2.9 in | |
| June | 57°F (14°C) | 2.5 in | |
| July | 62°F (17°C) | 1.8 in | Driest |
| August | 62°F (17°C) | 2.0 in | Warmest |
| September | 57°F (14°C) | 2.3 in | |
| October | 48°F (9°C) | 5.4 in | |
| November | 41°F (5°C) | 7.2 in | Wettest |
| December | 37°F (3°C) | 6.5 in |
Sliammon has a seasonal temperature swing of 25°F / from 37°F in January to 62°F in August. Total annual precipitation is 48.9 inches, with November being the wettest month (7.2") and July the driest (1.8").