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Siska Flat, BC

Full City Profile · British Columbia

2.7 /5.0
C+ Fair
101 Population 421/sq mi density
$76,768 Median Income $46,858 per capita
$560,468 Home Value
$1,072 Median Rent 27.8% income on rent
42°F Avg Temperature 284 sunny days/yr
C+
Overall
2.7 / 5.0
Fair overall score based on economy, affordability, safety and education
B+
Economy
3.6 / 5.0
$76,768 median income, 5.1% unemployment
C+
Affordability
2.5 / 5.0
$560,468 home value, $1,072/mo rent
C+
Safety
2.5 / 5.0
C
Education
2.2 / 5.0
0.0% bachelor's degree or higher
Siska Flat has a cool climate with an average annual temperature of 42°F (6°C). Winters average 24°F in January while summers reach 60°F in July. The area gets 284 sunny days per year. Annual precipitation totals 28.8 inches. The area receives 16.1 inches of snow annually.

Temperature

24°F Jan (-5°C) 60°F Jul (15°C)
Annual Average41.9°F
22% below US avg
January Average24°F (-5°C)
July Average60°F (15°C)
Sunny Days284 days/yr

Geography

Elevation656 ft (200 m)
Area0.2 sq mi (0.6 km²)
Population Density421/sq mi
Coordinates50.1355°N, 121.5713°W
TimezoneAmerica/Vancouver

Precipitation & Snow

Annual Rainfall 28.8"
24% below US avg
Snowfall 16.1"
Wettest Month (Nov) 4.06"
Driest Month (Aug) 1.42"

Air Quality

Earthquake History

56 earthquakes (M2.5+) within 150 km since 1990. Strongest: M5.0. Most recent: M2.6 on Aug 10, 2025.

Apr 14, 1990 4 km ENE of Deming, Washington M5.0 150 km
Feb 21, 2025 28 km W of Squamish, Canada M4.8 150 km
Aug 17, 2002 39 km ESE of Merritt, Canada M4.5 94 km
Feb 19, 1991 31 km E of Squamish, Canada M4.3 96 km
Sep 19, 1993 32 km ENE of Merritt, Canada M3.8 87 km
Jan 12, 1997 15 km N of Princeton, Canada M3.5 97 km
Mar 8, 1992 27 km SW of Princeton, Canada M3.4 113 km
Jul 19, 2025 34 km W of Okanagan Falls, Canada M3.4 139 km
Apr 28, 2023 38 km SW of Princeton, Canada M3.4 118 km
Aug 12, 2011 38 km NNE of Maple Ridge, Canada M3.3 89 km
Jul 5, 2015 7 km ENE of Sumas, Washington M3.3 132 km
Aug 20, 2003 39 km ESE of Merritt, Canada M3.2 94 km
Aug 19, 2017 23 km WNW of Princeton, Canada M3.1 86 km
Jan 26, 2024 36 km WNW of Squamish, Canada M3.1 148 km
Jul 3, 1991 6 km ENE of Maple Ridge, Canada M3.0 121 km
Oct 6, 2001 8 km E of Deming, Washington M3.0 149 km
Aug 15, 2016 43 km S of Princeton, Canada M3.0 139 km
Apr 15, 1990 3 km NE of Deming, Washington M3.0 150 km
Feb 13, 2010 36 km NNE of Princeton, Canada M3.0 104 km
May 18, 2011 18 km NNE of Princeton, Canada M3.0 98 km
Source: USGS (M2.5+, 1990–2025)

Tsunami History

2 tsunamis recorded within 500 km. Highest wave on record: 38.0 m (125 ft).

Year Location Cause Max Wave Deaths Distance
2007 CHEHALIS LAKE, CHILLIWACK Meteorological 38.0 m 81 km
1905 THOMPSON RIVER Meteorological 6.0 m 15 35 km
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.

Nearby Volcanoes

6 volcanoes within 200 km. Closest: Garibaldi Lake (105 km).

Name Type Elevation Last Eruption Distance
Garibaldi Lake Volcanic field 2,316 m (7,598 ft) Unknown 105 km
Garibaldi Stratovolcano 2,678 m (8,786 ft) -8060 107 km
Cayley Volcanic Field Volcanic field 2,375 m (7,792 ft) Unknown 122 km
Meager Complex 2,680 m (8,793 ft) -410 147 km
Bridge River Cones Volcanic field 2,500 m (8,202 ft) Unknown 149 km
Baker Stratovolcano(es) 3,285 m (10,778 ft) 1880 152 km
Source: Smithsonian Institution Global Volcanism Program (GVP). Sorted by distance.

Monthly Weather

Month Avg Temperature Precipitation Summary
January 24°F (-5°C) 3.7 in Coldest
February 29°F (-2°C) 2.4 in
March 34°F (1°C) 2.2 in
April 40°F (5°C) 1.6 in
May 48°F (9°C) 1.9 in
June 55°F (13°C) 1.9 in
July 60°F (15°C) 1.5 in
August 61°F (16°C) 1.4 in Warmest, Driest
September 53°F (12°C) 1.6 in
October 43°F (6°C) 2.8 in
November 32°F (0°C) 4.1 in Wettest
December 25°F (-4°C) 3.7 in

Siska Flat has a seasonal temperature swing of 37°F / from 24°F in January to 61°F in August. Total annual precipitation is 28.8 inches, with November being the wettest month (4.1") and August the driest (1.4").

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