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Weather & Climate in Okanagan-Similkameen G, BC
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Okanagan-Similkameen G has a cool climate with an average annual temperature of 38°F (3°C). Winters average 20°F in January while summers reach 57°F in July. The area gets 300 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 19.9 inches (drier than the 38-inch national average). The area receives 8.4 inches of snow annually. The city sits at an elevation of 1,722 feet.
Temperature
20°F Jan (-7°C)
57°F Jul (14°C)
| Annual Average | 38.2°F |
| 29% below US avg | |
| January Average | 20°F (-7°C) |
| July Average | 57°F (14°C) |
| Sunny Days | 300 days/yr |
Geography
| Elevation | 1,722 ft (525 m) |
| Area | 814.9 sq mi (2,110.7 km²) |
| Population Density | 3/sq mi |
| Coordinates | 49.3576°N, 120.0766°W |
| Timezone | America/Vancouver |
Precipitation & Snow
Air Quality
Earthquake History
115 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 | 111 km | 10 km |
| Aug 17, 2002 | 39 km ESE of Merritt, Canada | M4.5 | 69 km | 10 km |
| Sep 1, 2015 | 15 km N of Nespelem Community, Washington | M4.2 | 140 km | 9 km |
| Apr 15, 1991 | 4 km SE of Pateros, Washington | M3.9 | 149 km | 11 km |
| Sep 10, 2016 | 23 km E of Oliver, Canada | M3.9 | 63 km | 1 km |
| Mar 3, 1998 | 16 km NNE of Grand Forks, Canada | M3.8 | 127 km | 5 km |
| Sep 19, 1993 | 32 km ENE of Merritt, Canada | M3.8 | 94 km | 10 km |
| Jan 26, 1992 | 9 km SSE of Okanagan Falls, Canada | M3.7 | 41 km | 10 km |
| Jun 24, 1997 | 16 km NW of Malott, Washington | M3.6 | 110 km | 7 km |
| Jan 12, 1997 | 15 km N of Princeton, Canada | M3.5 | 41 km | 5 km |
| Apr 28, 2023 | 38 km SW of Princeton, Canada | M3.4 | 58 km | 5 km |
| Mar 8, 1992 | 27 km SW of Princeton, Canada | M3.4 | 50 km | 5 km |
| Jul 19, 2025 | 34 km W of Okanagan Falls, Canada | M3.4 | 4 km | 7 km |
| Apr 20, 2025 | 8 km NW of Tonasket, Washington | M3.2 | 77 km | 15 km |
| Apr 13, 2025 | 7 km NW of Tonasket, Washington | M3.2 | 79 km | 15 km |
| Feb 6, 2005 | 32 km NE of Marblemount, Washington | M3.2 | 104 km | -1 km |
| Aug 20, 2003 | 39 km ESE of Merritt, Canada | M3.2 | 69 km | 10 km |
| Mar 3, 1998 | 15 km NNE of Grand Forks, Canada | M3.2 | 129 km | 5 km |
| May 28, 2022 | 55 km NE of Marblemount, Washington | M3.2 | 82 km | 0 km |
| May 15, 2025 | 9 km NW of Tonasket, Washington | M3.1 | 77 km | 15 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
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 | — | 140 km |
| 1905 | THOMPSON RIVER | Meteorological | 6.0 m | 15 | 149 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
2 volcanoes within 200 km. Closest: Baker (142 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Baker | Stratovolcano(es) | 3,285 m (10,778 ft) | 1880 | 142 km |
| Glacier Peak | Stratovolcano | 3,213 m (10,541 ft) | 1700 | 158 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Wildfire History
20 wildfires (100+ acres) recorded within 100 km. Largest: LIMEBELT (137,098 acres, 2015).
| Year | Name | Acres Burned | Distance |
| 2015 | LIMEBELT | 137,098 | 99 km |
| 2017 | DIAMOND CREEK | 117,527 | 50 km |
| 2006 | TRIPOD COMPLEX (SPUR PEAK) | 115,123 | 58 km |
| 2003 | FAWN PEAK COMPLEX (FAREWELL) | 77,444 | 58 km |
| 2021 | CUB CREEK 2 | 74,601 | 77 km |
| 2006 | TRIPOD COMPLEX (TRIPOD) | 59,712 | 92 km |
| 2021 | CEDAR CREEK | 58,591 | 98 km |
| 2006 | TATOOSH COMPLEX | 48,862 | 57 km |
| 2022 | PARKS | 34,621 | 59 km |
| 1985 | BARKER MT | 32,839 | 91 km |
| 2021 | WALKER CREEK | 26,165 | 97 km |
| 2018 | MCLEOD | 24,738 | 76 km |
| 2003 | NEEDLES | 21,458 | 86 km |
| 2020 | PALMER | 18,015 | 65 km |
| 2023 | EAGLE BLUFF | 16,499 | 60 km |
| 2007 | TUNK GRADE | 15,007 | 95 km |
| 2021 | MUCKAMUCK | 14,426 | 88 km |
| 1994 | THUNDER | 10,720 | 63 km |
| 2000 | ROCKY HULL | 9,927 | 77 km |
| 2001 | THIRTY MILE | 9,120 | 60 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 20°F (-7°C) | 1.9 in | |
| February | 25°F (-4°C) | 1.3 in | |
| March | 30°F (-1°C) | 1.2 in | |
| April | 37°F (3°C) | 1.1 in | Driest |
| May | 45°F (7°C) | 2.1 in | |
| June | 51°F (11°C) | 2.2 in | Wettest |
| July | 57°F (14°C) | 1.8 in | |
| August | 58°F (14°C) | 1.7 in | Warmest |
| September | 50°F (10°C) | 1.3 in | |
| October | 40°F (4°C) | 1.3 in | |
| November | 28°F (-3°C) | 2.0 in | |
| December | 19°F (-7°C) | 2.0 in | Coldest |
Okanagan-Similkameen G has a seasonal temperature swing of 38°F / from 19°F in December to 58°F in August. Total annual precipitation is 19.9 inches, with June being the wettest month (2.2") and April the driest (1.1").