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Weather & Climate in Osoyoos, BC
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Osoyoos 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 909 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 | 909 ft (277 m) |
| Area | 50.3 sq mi (130.3 km²) |
| Population Density | 28/sq mi |
| Coordinates | 49.0331°N, 119.4524°W |
| Timezone | America/Vancouver |
Precipitation & Snow
Air Quality
Earthquake History
126 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 | 81 km | 10 km |
| Aug 17, 2002 | 39 km ESE of Merritt, Canada | M4.5 | 120 km | 10 km |
| Sep 1, 2015 | 15 km N of Nespelem Community, Washington | M4.2 | 87 km | 9 km |
| Sep 10, 2016 | 23 km E of Oliver, Canada | M3.9 | 25 km | 1 km |
| Apr 15, 1991 | 4 km SE of Pateros, Washington | M3.9 | 116 km | 11 km |
| Mar 3, 1998 | 16 km NNE of Grand Forks, Canada | M3.8 | 82 km | 5 km |
| Sep 19, 1993 | 32 km ENE of Merritt, Canada | M3.8 | 143 km | 10 km |
| Jan 26, 1992 | 9 km SSE of Okanagan Falls, Canada | M3.7 | 27 km | 10 km |
| Jun 24, 1997 | 16 km NW of Malott, Washington | M3.6 | 80 km | 7 km |
| Jan 12, 1997 | 15 km N of Princeton, Canada | M3.5 | 99 km | 5 km |
| Jul 19, 2025 | 34 km W of Okanagan Falls, Canada | M3.4 | 57 km | 7 km |
| Apr 28, 2023 | 38 km SW of Princeton, Canada | M3.4 | 102 km | 5 km |
| Mar 8, 1992 | 27 km SW of Princeton, Canada | M3.4 | 98 km | 5 km |
| Jan 14, 2004 | 2 km S of Manson, Washington | M3.3 | 140 km | 1 km |
| Oct 27, 1991 | 21 km N of Castlegar, Canada | M3.3 | 144 km | 7 km |
| Mar 17, 2008 | 48 km WNW of Granite Falls, Washington | M3.3 | 147 km | 0 km |
| Apr 20, 2025 | 8 km NW of Tonasket, Washington | M3.2 | 30 km | 15 km |
| Mar 3, 1998 | 15 km NNE of Grand Forks, Canada | M3.2 | 83 km | 5 km |
| Apr 13, 2025 | 7 km NW of Tonasket, Washington | M3.2 | 31 km | 15 km |
| Feb 6, 2005 | 32 km NE of Marblemount, Washington | M3.2 | 129 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 | — | 108 km |
| 2024 | COLUMBIA RIVER VALLEY, WA | Meteorological | 14.3 m | — | 109 km |
| 1944 | COLUMBIA RIVER VALLEY, WA | Meteorological | 9.1 m | — | 108 km |
| 1953 | COLUMBIA RIVER VALLEY, WA | Meteorological | 4.8 m | — | 108 km |
| 1953 | COLUMBIA RIVER VALLEY, WA | Meteorological | — | — | 108 km |
| 1952 | COLUMBIA RIVER VALLEY, WA | Meteorological | — | — | 108 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
2 volcanoes within 200 km. Closest: Glacier Peak (159 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Glacier Peak | Stratovolcano | 3,213 m (10,541 ft) | 1700 | 159 km |
| Baker | Stratovolcano(es) | 3,285 m (10,778 ft) | 1880 | 175 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 | 95 km |
| 2015 | NORTH STAR | 218,547 | 78 km |
| 2020 | COLD SPRINGS | 187,561 | 92 km |
| 2015 | TUNK BLOCK | 180,111 | 62 km |
| 2015 | LIMEBELT | 137,098 | 61 km |
| 2017 | DIAMOND CREEK | 117,527 | 65 km |
| 2006 | TRIPOD COMPLEX (SPUR PEAK) | 115,123 | 44 km |
| 2003 | FAWN PEAK COMPLEX (FAREWELL) | 77,444 | 57 km |
| 2021 | CUB CREEK 2 | 74,601 | 65 km |
| 2021 | WHITMORE | 59,925 | 93 km |
| 2006 | TRIPOD COMPLEX (TRIPOD) | 59,712 | 68 km |
| 2021 | CEDAR CREEK | 58,591 | 93 km |
| 2015 | STICKPIN | 54,119 | 79 km |
| 2006 | TATOOSH COMPLEX | 48,862 | 84 km |
| 2001 | VIRGINIA L | 35,780 | 88 km |
| 2001 | ST MARYS | 34,914 | 81 km |
| 2022 | PARKS | 34,621 | 89 km |
| 1985 | BARKER MT | 32,839 | 37 km |
| 2021 | WALKER CREEK | 26,165 | 39 km |
| 2018 | MCLEOD | 24,738 | 76 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 |
Osoyoos 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").