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Weather & Climate in Kootenay Boundary D / Rural Grand Forks, BC
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Kootenay Boundary D / Rural Grand Forks has a cool climate with an average annual temperature of 41°F (5°C). Winters average 21°F in January while summers reach 61°F in July. The area gets 296 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 22.3 inches (drier than the 38-inch national average). The area receives 10.2 inches of snow annually. The city sits at an elevation of 1,775 feet.
Temperature
21°F Jan (-6°C)
61°F Jul (16°C)
| Annual Average | 41.1°F |
| 24% below US avg | |
| January Average | 21°F (-6°C) |
| July Average | 61°F (16°C) |
| Sunny Days | 296 days/yr |
Geography
| Elevation | 1,775 ft (541 m) |
| Area | 817.7 sq mi (2,117.9 km²) |
| Population Density | 4/sq mi |
| Coordinates | 49.0002°N, 118.5034°W |
| Timezone | America/Vancouver |
Precipitation & Snow
Air Quality
Earthquake History
99 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 | 124 km | 10 km |
| Sep 1, 2015 | 15 km N of Nespelem Community, Washington | M4.2 | 86 km | 9 km |
| Apr 15, 1991 | 4 km SE of Pateros, Washington | M3.9 | 147 km | 11 km |
| Sep 10, 2016 | 23 km E of Oliver, Canada | M3.9 | 58 km | 1 km |
| Mar 3, 1998 | 16 km NNE of Grand Forks, Canada | M3.8 | 22 km | 5 km |
| Jan 26, 1992 | 9 km SSE of Okanagan Falls, Canada | M3.7 | 80 km | 10 km |
| Jun 24, 1997 | 16 km NW of Malott, Washington | M3.6 | 123 km | 7 km |
| Jul 19, 2025 | 34 km W of Okanagan Falls, Canada | M3.4 | 119 km | 7 km |
| Aug 20, 1990 | 23 km NW of Nelson, Canada | M3.3 | 98 km | -1 km |
| Oct 27, 1991 | 21 km N of Castlegar, Canada | M3.3 | 86 km | 7 km |
| Apr 20, 2025 | 8 km NW of Tonasket, Washington | M3.2 | 78 km | 15 km |
| Mar 3, 1998 | 15 km NNE of Grand Forks, Canada | M3.2 | 21 km | 5 km |
| Feb 15, 2020 | 37 km ESE of Nelson, Canada | M3.2 | 131 km | 10 km |
| Apr 13, 2025 | 7 km NW of Tonasket, Washington | M3.2 | 78 km | 15 km |
| May 15, 2025 | 9 km NW of Tonasket, Washington | M3.1 | 78 km | 15 km |
| Apr 13, 2025 | 6 km NW of Tonasket, Washington | M3.1 | 78 km | 15 km |
| Jan 31, 1999 | 22 km N of Keller, Washington | M3.1 | 81 km | 10 km |
| Nov 25, 2000 | 13 km SSE of Oroville, Washington | M3.1 | 64 km | 1 km |
| Apr 16, 2025 | 9 km NW of Tonasket, Washington | M3.1 | 79 km | 15 km |
| Mar 19, 1998 | 31 km SSW of Nakusp, Canada | M3.0 | 116 km | 0 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tsunami History
9 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 | — | 54 km |
| 1949 | COLUMBIA RIVER VALLEY, WA | Meteorological | 19.8 m | — | 132 km |
| 2024 | COLUMBIA RIVER VALLEY, WA | Meteorological | 14.3 m | — | 55 km |
| 1944 | COLUMBIA RIVER VALLEY, WA | Meteorological | 9.1 m | — | 54 km |
| 2009 | COLUMBIA RIVER VALLEY, WA | Meteorological | 9.0 m | — | 137 km |
| 1953 | COLUMBIA RIVER VALLEY, WA | Meteorological | 4.8 m | — | 54 km |
| 2009 | COLUMBIA RIVER VALLEY, WA | Meteorological | 3.6 m | — | 125 km |
| 1953 | COLUMBIA RIVER VALLEY, WA | Meteorological | — | — | 54 km |
| 1952 | COLUMBIA RIVER VALLEY, WA | Meteorological | — | — | 54 km |
Source: NOAA/NCEI Historical Tsunami Database.
Wildfire History
20 wildfires (100+ acres) recorded within 100 km. Largest: NORTH STAR (218,547 acres, 2015).
| Year | Name | Acres Burned | Distance |
| 2015 | NORTH STAR | 218,547 | 73 km |
| 2015 | TUNK BLOCK | 180,111 | 84 km |
| 2021 | SUMMIT TRAIL | 54,855 | 70 km |
| 2015 | STICKPIN | 54,119 | 19 km |
| 2021 | CHUWEAH CREEK FIRE | 37,393 | 99 km |
| 2001 | ST MARYS | 34,914 | 99 km |
| 1985 | BARKER MT | 32,839 | 66 km |
| 2021 | WALKER CREEK | 26,165 | 48 km |
| 2014 | DEVILS ELBOW COMPLEX | 25,988 | 83 km |
| 1988 | WHITE MOUNTAIN | 21,855 | 50 km |
| 2020 | PALMER | 18,015 | 80 km |
| 1996 | TIMBERLINE COMPLEX | 17,009 | 91 km |
| 2023 | EAGLE BLUFF | 16,499 | 77 km |
| 2007 | TUNK GRADE | 15,007 | 81 km |
| 2015 | RENNER | 13,975 | 35 km |
| 2020 | KEWA FIELD | 11,811 | 93 km |
| 2000 | ROCKY HULL | 9,927 | 65 km |
| 1994 | COPPER BUTTE | 9,068 | 30 km |
| 2015 | GRAVES MOUNTAIN | 8,559 | 43 km |
| 1994 | UNNAMED | 8,385 | 80 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 21°F (-6°C) | 2.2 in | Coldest |
| February | 27°F (-3°C) | 1.6 in | |
| March | 33°F (0°C) | 1.5 in | |
| April | 41°F (5°C) | 1.7 in | |
| May | 49°F (9°C) | 2.2 in | |
| June | 55°F (13°C) | 2.5 in | |
| July | 61°F (16°C) | 1.5 in | |
| August | 61°F (16°C) | 1.6 in | Warmest |
| September | 53°F (12°C) | 1.3 in | Driest |
| October | 42°F (5°C) | 1.3 in | |
| November | 30°F (-1°C) | 2.2 in | |
| December | 22°F (-6°C) | 2.6 in | Wettest |
Kootenay Boundary D / Rural Grand Forks has a seasonal temperature swing of 40°F / from 21°F in January to 61°F in August. Total annual precipitation is 22.3 inches, with December being the wettest month (2.6") and September the driest (1.3").