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Weather & Climate in Okanagan-Similkameen A, BC
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Okanagan-Similkameen A has a cool climate with an average annual temperature of 44°F (7°C). Winters average 23°F in January while summers reach 64°F in July. The area gets 308 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 15.2 inches (drier than the 38-inch national average). The area receives 5.7 inches of snow annually. The city sits at an elevation of 994 feet.
Temperature
23°F Jan (-5°C)
64°F Jul (18°C)
| Annual Average | 44.0°F |
| 19% below US avg | |
| January Average | 23°F (-5°C) |
| July Average | 64°F (18°C) |
| Sunny Days | 308 days/yr |
Geography
| Elevation | 994 ft (303 m) |
| Area | 99.6 sq mi (258.0 km²) |
| Population Density | 22/sq mi |
| Coordinates | 49.0003°N, 119.4628°W |
| Timezone | America/Vancouver |
Precipitation & Snow
Air Quality
Earthquake History
131 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 | 77 km | 10 km |
| Aug 17, 2002 | 39 km ESE of Merritt, Canada | M4.5 | 122 km | 10 km |
| Sep 1, 2015 | 15 km N of Nespelem Community, Washington | M4.2 | 84 km | 9 km |
| Apr 15, 1991 | 4 km SE of Pateros, Washington | M3.9 | 112 km | 11 km |
| Sep 10, 2016 | 23 km E of Oliver, Canada | M3.9 | 28 km | 1 km |
| Mar 3, 1998 | 16 km NNE of Grand Forks, Canada | M3.8 | 83 km | 5 km |
| Sep 19, 1993 | 32 km ENE of Merritt, Canada | M3.8 | 146 km | 10 km |
| Jan 26, 1992 | 9 km SSE of Okanagan Falls, Canada | M3.7 | 30 km | 10 km |
| Jul 4, 1997 | 8 km NNE of Waterville, Washington | M3.7 | 149 km | 7 km |
| Jun 24, 1997 | 16 km NW of Malott, Washington | M3.6 | 76 km | 7 km |
| Jan 12, 1997 | 15 km N of Princeton, Canada | M3.5 | 101 km | 5 km |
| Apr 28, 2023 | 38 km SW of Princeton, Canada | M3.4 | 102 km | 5 km |
| Jul 19, 2025 | 34 km W of Okanagan Falls, Canada | M3.4 | 59 km | 7 km |
| Mar 8, 1992 | 27 km SW of Princeton, Canada | M3.4 | 99 km | 5 km |
| Jul 24, 2017 | Washington | M3.3 | 150 km | 2 km |
| Oct 27, 1991 | 21 km N of Castlegar, Canada | M3.3 | 146 km | 7 km |
| Mar 17, 2008 | 48 km WNW of Granite Falls, Washington | M3.3 | 143 km | 0 km |
| Jan 14, 2004 | 2 km S of Manson, Washington | M3.3 | 137 km | 1 km |
| Apr 20, 2025 | 8 km NW of Tonasket, Washington | M3.2 | 26 km | 15 km |
| Feb 28, 2001 | 6 km SSW of Chelan Falls, Washington | M3.2 | 145 km | -1 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 | — | 107 km |
| 2024 | COLUMBIA RIVER VALLEY, WA | Meteorological | 14.3 m | — | 108 km |
| 1944 | COLUMBIA RIVER VALLEY, WA | Meteorological | 9.1 m | — | 107 km |
| 1953 | COLUMBIA RIVER VALLEY, WA | Meteorological | 4.8 m | — | 107 km |
| 1953 | COLUMBIA RIVER VALLEY, WA | Meteorological | — | — | 107 km |
| 1952 | COLUMBIA RIVER VALLEY, WA | Meteorological | — | — | 107 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
2 volcanoes within 200 km. Closest: Glacier Peak (157 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Glacier Peak | Stratovolcano | 3,213 m (10,541 ft) | 1700 | 157 km |
| Baker | Stratovolcano(es) | 3,285 m (10,778 ft) | 1880 | 174 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Wildfire History
20 wildfires (100+ acres) recorded within 100 km. Largest: CARLTON COMPLEX (276,249 acres, 2014).
| Year | Name | Acres Burned | Distance |
| 2014 | CARLTON COMPLEX | 276,249 | 91 km |
| 2015 | NORTH STAR | 218,547 | 76 km |
| 2020 | COLD SPRINGS | 187,561 | 88 km |
| 2015 | TUNK BLOCK | 180,111 | 59 km |
| 2015 | LIMEBELT | 137,098 | 57 km |
| 2017 | DIAMOND CREEK | 117,527 | 64 km |
| 2006 | TRIPOD COMPLEX (SPUR PEAK) | 115,123 | 42 km |
| 2003 | FAWN PEAK COMPLEX (FAREWELL) | 77,444 | 55 km |
| 2021 | CUB CREEK 2 | 74,601 | 63 km |
| 2021 | WHITMORE | 59,925 | 89 km |
| 2006 | TRIPOD COMPLEX (TRIPOD) | 59,712 | 65 km |
| 2021 | CEDAR CREEK | 58,591 | 90 km |
| 2015 | STICKPIN | 54,119 | 79 km |
| 2018 | CRESCENT MOUNTAIN | 53,258 | 100 km |
| 2006 | TATOOSH COMPLEX | 48,862 | 83 km |
| 2001 | VIRGINIA L | 35,780 | 84 km |
| 2001 | ST MARYS | 34,914 | 77 km |
| 2022 | PARKS | 34,621 | 89 km |
| 1985 | BARKER MT | 32,839 | 34 km |
| 2021 | WALKER CREEK | 26,165 | 37 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 23°F (-5°C) | 1.4 in | Coldest |
| February | 29°F (-2°C) | 1.1 in | |
| March | 36°F (2°C) | 0.9 in | |
| April | 44°F (7°C) | 1.0 in | |
| May | 52°F (11°C) | 1.7 in | |
| June | 59°F (15°C) | 1.8 in | Wettest |
| July | 64°F (18°C) | 1.2 in | |
| August | 64°F (18°C) | 1.2 in | Warmest |
| September | 56°F (13°C) | 0.9 in | Driest |
| October | 44°F (7°C) | 0.9 in | |
| November | 32°F (0°C) | 1.4 in | |
| December | 24°F (-5°C) | 1.7 in |
Okanagan-Similkameen A has a seasonal temperature swing of 41°F / from 23°F in January to 64°F in August. Total annual precipitation is 15.2 inches, with June being the wettest month (1.8") and September the driest (0.9").