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Weather & Climate in Okanagan-Similkameen E, BC
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Okanagan-Similkameen E experiences four distinct seasons with an average annual temperature of 46°F (8°C). Winters average 25°F in January while summers reach 66°F in July. The area gets 311 sunny days per year, well above the U.S. average of 205 / making it one of the sunnier locations in the country. Annual precipitation totals 14.0 inches (drier than the 38-inch national average). The area receives 4.9 inches of snow annually. The city sits at an elevation of 1,148 feet.
Temperature
25°F Jan (-4°C)
66°F Jul (19°C)
| Annual Average | 45.9°F |
| 15% below US avg | |
| January Average | 25°F (-4°C) |
| July Average | 66°F (19°C) |
| Sunny Days | 311 days/yr |
Geography
| Elevation | 1,148 ft (350 m) |
| Area | 189.9 sq mi (491.9 km²) |
| Population Density | 11/sq mi |
| Coordinates | 49.4988°N, 119.5921°W |
| Timezone | America/Vancouver |
Precipitation & Snow
Air Quality
Earthquake History
101 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.6.
| Jun 24, 1997 | 16 km WNW of Malott, Washington | M4.6 | 128 km | 10 km |
| Aug 17, 2002 | 39 km ESE of Merritt, Canada | M4.5 | 72 km | 10 km |
| Sep 1, 2015 | 15 km N of Nespelem Community, Washington | M4.2 | 139 km | 9 km |
| Sep 10, 2016 | 23 km E of Oliver, Canada | M3.9 | 42 km | 1 km |
| Sep 19, 1993 | 32 km ENE of Merritt, Canada | M3.8 | 93 km | 10 km |
| Mar 3, 1998 | 16 km NNE of Grand Forks, Canada | M3.8 | 97 km | 5 km |
| Jan 26, 1992 | 9 km SSE of Okanagan Falls, Canada | M3.7 | 26 km | 10 km |
| Jun 24, 1997 | 16 km NW of Malott, Washington | M3.6 | 127 km | 7 km |
| Jan 12, 1997 | 15 km N of Princeton, Canada | M3.5 | 67 km | 5 km |
| Apr 28, 2023 | 38 km SW of Princeton, Canada | M3.4 | 97 km | 5 km |
| Jul 19, 2025 | 34 km W of Okanagan Falls, Canada | M3.4 | 35 km | 7 km |
| Mar 8, 1992 | 27 km SW of Princeton, Canada | M3.4 | 88 km | 5 km |
| Aug 20, 1990 | 23 km NW of Nelson, Canada | M3.3 | 148 km | -1 km |
| Oct 27, 1991 | 21 km N of Castlegar, Canada | M3.3 | 143 km | 7 km |
| Apr 20, 2025 | 8 km NW of Tonasket, Washington | M3.2 | 82 km | 15 km |
| Apr 13, 2025 | 7 km NW of Tonasket, Washington | M3.2 | 83 km | 15 km |
| Aug 20, 2003 | 39 km ESE of Merritt, Canada | M3.2 | 72 km | 10 km |
| Feb 6, 2005 | 32 km NE of Marblemount, Washington | M3.2 | 141 km | -1 km |
| Mar 3, 1998 | 15 km NNE of Grand Forks, Canada | M3.2 | 100 km | 5 km |
| May 28, 2022 | 55 km NE of Marblemount, Washington | M3.2 | 118 km | 0 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tsunami History
6 tsunamis recorded within 500 km. Highest wave on record: 19.8 m (65 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1952 | COLUMBIA RIVER VALLEY, WA | Meteorological | 19.8 m | — | 147 km |
| 2024 | COLUMBIA RIVER VALLEY, WA | Meteorological | 14.3 m | — | 148 km |
| 1944 | COLUMBIA RIVER VALLEY, WA | Meteorological | 9.1 m | — | 147 km |
| 1953 | COLUMBIA RIVER VALLEY, WA | Meteorological | 4.8 m | — | 147 km |
| 1953 | COLUMBIA RIVER VALLEY, WA | Meteorological | — | — | 147 km |
| 1952 | COLUMBIA RIVER VALLEY, WA | Meteorological | — | — | 147 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
2 volcanoes within 200 km. Closest: Baker (180 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Baker | Stratovolcano(es) | 3,285 m (10,778 ft) | 1880 | 180 km |
| Glacier Peak | Stratovolcano | 3,213 m (10,541 ft) | 1700 | 190 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Wildfire History
20 wildfires (100+ acres) recorded within 100 km. Largest: DIAMOND CREEK (117,527 acres, 2017).
| Year | Name | Acres Burned | Distance |
| 2017 | DIAMOND CREEK | 117,527 | 82 km |
| 2006 | TRIPOD COMPLEX (SPUR PEAK) | 115,123 | 79 km |
| 2003 | FAWN PEAK COMPLEX (FAREWELL) | 77,444 | 85 km |
| 2006 | TATOOSH COMPLEX | 48,862 | 93 km |
| 2022 | PARKS | 34,621 | 96 km |
| 1985 | BARKER MT | 32,839 | 90 km |
| 2021 | WALKER CREEK | 26,165 | 88 km |
| 2020 | PALMER | 18,015 | 70 km |
| 2023 | EAGLE BLUFF | 16,499 | 62 km |
| 2007 | TUNK GRADE | 15,007 | 99 km |
| 1994 | THUNDER | 10,720 | 83 km |
| 2000 | ROCKY HULL | 9,927 | 75 km |
| 2001 | THIRTY MILE | 9,120 | 82 km |
| 2014 | UPPER FALLS | 8,846 | 96 km |
| 1994 | UNNAMED | 8,385 | 53 km |
| 2002 | QUARTZ MT. COMPLEX (MIDDLE MOUNTAIN) | 8,173 | 94 km |
| 2021 | CHICKADEE CREEK | 7,003 | 82 km |
| 2015 | NEWBY LAKE | 5,794 | 62 km |
| 2000 | UNNAMED | 5,698 | 86 km |
| 2003 | ISABEL | 5,617 | 95 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 25°F (-4°C) | 1.3 in | Coldest |
| February | 31°F (-1°C) | 0.9 in | |
| March | 38°F (3°C) | 0.9 in | |
| April | 46°F (8°C) | 1.0 in | |
| May | 54°F (12°C) | 1.5 in | |
| June | 61°F (16°C) | 1.7 in | Wettest |
| July | 66°F (19°C) | 1.3 in | Warmest |
| August | 66°F (19°C) | 1.2 in | |
| September | 57°F (14°C) | 0.9 in | |
| October | 46°F (8°C) | 0.8 in | Driest |
| November | 35°F (1°C) | 1.2 in | |
| December | 27°F (-3°C) | 1.5 in |
Okanagan-Similkameen E has a seasonal temperature swing of 41°F / from 25°F in January to 66°F in July. Total annual precipitation is 14.0 inches, with June being the wettest month (1.7") and October the driest (0.8").