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Weather & Climate in Okanagan-Similkameen H, BC
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Okanagan-Similkameen H has a cool climate with an average annual temperature of 40°F (4°C). Winters average 21°F in January while summers reach 58°F in July. The area gets 295 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 22.7 inches (drier than the 38-inch national average). The area receives 11.8 inches of snow annually. The city sits at an elevation of 2,569 feet.
Temperature
21°F Jan (-6°C)
58°F Jul (14°C)
| Annual Average | 39.6°F |
| 27% below US avg | |
| January Average | 21°F (-6°C) |
| July Average | 58°F (14°C) |
| Sunny Days | 295 days/yr |
Geography
| Elevation | 2,569 ft (783 m) |
| Area | 1,836.8 sq mi (4,757.2 km²) |
| Population Density | 1/sq mi |
| Coordinates | 49.5453°N, 120.7595°W |
| Timezone | America/Vancouver |
Precipitation & Snow
Air Quality
Earthquake History
176 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M5.0.
| Apr 14, 1990 | 4 km ENE of Deming, Washington | M5.0 | 128 km | 12 km |
| Jun 24, 1997 | 16 km WNW of Malott, Washington | M4.6 | 146 km | 10 km |
| Aug 17, 2002 | 39 km ESE of Merritt, Canada | M4.5 | 57 km | 10 km |
| Apr 2, 1990 | 2 km ENE of Deming, Washington | M4.3 | 131 km | 0 km |
| Feb 19, 1991 | 31 km E of Squamish, Canada | M4.3 | 143 km | 5 km |
| Apr 14, 1990 | 2 km ESE of Deming, Washington | M4.0 | 131 km | 3 km |
| Apr 3, 1990 | 3 km ENE of Deming, Washington | M4.0 | 130 km | 1 km |
| Sep 10, 2016 | 23 km E of Oliver, Canada | M3.9 | 117 km | 1 km |
| Sep 19, 1993 | 32 km ENE of Merritt, Canada | M3.8 | 76 km | 10 km |
| Jan 26, 1992 | 9 km SSE of Okanagan Falls, Canada | M3.7 | 94 km | 10 km |
| Jun 21, 1990 | 4 km ENE of Deming, Washington | M3.6 | 128 km | 1 km |
| May 23, 1990 | 1 km E of Deming, Washington | M3.6 | 131 km | 1 km |
| Jun 24, 1997 | 16 km NW of Malott, Washington | M3.6 | 145 km | 7 km |
| Apr 14, 1990 | 2 km E of Deming, Washington | M3.6 | 130 km | 2 km |
| Jan 12, 1997 | 15 km N of Princeton, Canada | M3.5 | 20 km | 5 km |
| Jul 31, 1990 | 3 km E of Deming, Washington | M3.5 | 130 km | 1 km |
| Mar 8, 1992 | 27 km SW of Princeton, Canada | M3.4 | 30 km | 5 km |
| Jul 19, 2025 | 34 km W of Okanagan Falls, Canada | M3.4 | 56 km | 7 km |
| Apr 28, 2023 | 38 km SW of Princeton, Canada | M3.4 | 40 km | 5 km |
| Jul 5, 2015 | 7 km ENE of Sumas, Washington | M3.3 | 118 km | 8 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 | — | 91 km |
| 1905 | THOMPSON RIVER | Meteorological | 6.0 m | 15 | 106 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
5 volcanoes within 200 km. Closest: Baker (115 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Baker | Stratovolcano(es) | 3,285 m (10,778 ft) | 1880 | 115 km |
| Glacier Peak | Stratovolcano | 3,213 m (10,541 ft) | 1700 | 162 km |
| Garibaldi | Stratovolcano | 2,678 m (8,786 ft) | -8060 | 165 km |
| Garibaldi Lake | Volcanic field | 2,316 m (7,598 ft) | Unknown | 167 km |
| Cayley Volcanic Field | Volcanic field | 2,375 m (7,792 ft) | Unknown | 192 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 | 74 km |
| 2006 | TRIPOD COMPLEX (SPUR PEAK) | 115,123 | 97 km |
| 2003 | FAWN PEAK COMPLEX (FAREWELL) | 77,444 | 90 km |
| 2006 | TATOOSH COMPLEX | 48,862 | 64 km |
| 2022 | PARKS | 34,621 | 61 km |
| 2018 | MCLEOD | 24,738 | 98 km |
| 2003 | NEEDLES | 21,458 | 99 km |
| 2001 | THIRTY MILE | 9,120 | 97 km |
| 2014 | UPPER FALLS | 8,846 | 96 km |
| 2002 | QUARTZ MT. COMPLEX (MIDDLE MOUNTAIN) | 8,173 | 75 km |
| 2023 | SOURDOUGH | 7,517 | 94 km |
| 2015 | NEWBY LAKE | 5,794 | 90 km |
| 2022 | KID | 5,188 | 72 km |
| 2023 | CRATER CREEK | 4,837 | 87 km |
| 2002 | QUARTZ MT. COMPLEX (QUARTZ MOUNTAIN) | 4,716 | 68 km |
| 2022 | COPPER LAKE | 3,825 | 82 km |
| 1996 | ELBOW BASIN | 3,650 | 71 km |
| 1986 | EUREKA | 3,476 | 95 km |
| 2022 | BRUSH CREEK 2 | 3,186 | 85 km |
| 2022 | SILESIA | 2,737 | 87 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 21°F (-6°C) | 2.9 in | |
| February | 26°F (-3°C) | 1.8 in | |
| March | 32°F (-0°C) | 1.4 in | |
| April | 38°F (4°C) | 1.1 in | Driest |
| May | 46°F (8°C) | 1.6 in | |
| June | 53°F (12°C) | 1.9 in | |
| July | 58°F (14°C) | 1.6 in | |
| August | 59°F (15°C) | 1.4 in | Warmest |
| September | 51°F (11°C) | 1.4 in | |
| October | 41°F (5°C) | 1.8 in | |
| November | 29°F (-2°C) | 3.0 in | Wettest |
| December | 21°F (-6°C) | 2.7 in | Coldest |
Okanagan-Similkameen H has a seasonal temperature swing of 38°F / from 21°F in December to 59°F in August. Total annual precipitation is 22.7 inches, with November being the wettest month (3.0") and April the driest (1.1").