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Weather & Climate in Grand Forks, BC
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Grand Forks has a cool climate with an average annual temperature of 43°F (6°C). Winters average 22°F in January while summers reach 64°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 10.3 inches of snow annually. The city sits at an elevation of 1,686 feet.
Temperature
22°F Jan (-5°C)
64°F Jul (18°C)
| Annual Average | 43.4°F |
| 20% below US avg | |
| January Average | 22°F (-5°C) |
| July Average | 64°F (18°C) |
| Sunny Days | 296 days/yr |
Geography
| Elevation | 1,686 ft (514 m) |
| Area | 4.0 sq mi (10.4 km²) |
| Population Density | 1,027/sq mi |
| Coordinates | 49.0331°N, 118.4356°W |
| Timezone | America/Vancouver |
Precipitation & Snow
Air Quality
Earthquake History
96 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 | 130 km | 10 km |
| Sep 1, 2015 | 15 km N of Nespelem Community, Washington | M4.2 | 91 km | 9 km |
| Sep 10, 2016 | 23 km E of Oliver, Canada | M3.9 | 61 km | 1 km |
| Mar 3, 1998 | 16 km NNE of Grand Forks, Canada | M3.8 | 16 km | 5 km |
| Jan 26, 1992 | 9 km SSE of Okanagan Falls, Canada | M3.7 | 84 km | 10 km |
| Jun 24, 1997 | 16 km NW of Malott, Washington | M3.6 | 129 km | 7 km |
| Jul 19, 2025 | 34 km W of Okanagan Falls, Canada | M3.4 | 122 km | 7 km |
| Oct 27, 1991 | 21 km N of Castlegar, Canada | M3.3 | 80 km | 7 km |
| Aug 20, 1990 | 23 km NW of Nelson, Canada | M3.3 | 92 km | -1 km |
| Apr 20, 2025 | 8 km NW of Tonasket, Washington | M3.2 | 84 km | 15 km |
| Feb 15, 2020 | 37 km ESE of Nelson, Canada | M3.2 | 125 km | 10 km |
| Apr 13, 2025 | 7 km NW of Tonasket, Washington | M3.2 | 84 km | 15 km |
| Mar 3, 1998 | 15 km NNE of Grand Forks, Canada | M3.2 | 15 km | 5 km |
| May 15, 2025 | 9 km NW of Tonasket, Washington | M3.1 | 84 km | 15 km |
| Apr 13, 2025 | 6 km NW of Tonasket, Washington | M3.1 | 83 km | 15 km |
| Jan 31, 1999 | 22 km N of Keller, Washington | M3.1 | 86 km | 10 km |
| Nov 25, 2000 | 13 km SSE of Oroville, Washington | M3.1 | 70 km | 1 km |
| Apr 16, 2025 | 9 km NW of Tonasket, Washington | M3.1 | 85 km | 15 km |
| Mar 19, 1998 | 31 km SSW of Nakusp, Canada | M3.0 | 111 km | 0 km |
| Nov 12, 1998 | 22 km WSW of Nespelem Community, Washington | M3.0 | 120 km | 6 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 | — | 56 km |
| 1949 | COLUMBIA RIVER VALLEY, WA | Meteorological | 19.8 m | — | 135 km |
| 2024 | COLUMBIA RIVER VALLEY, WA | Meteorological | 14.3 m | — | 56 km |
| 1944 | COLUMBIA RIVER VALLEY, WA | Meteorological | 9.1 m | — | 56 km |
| 2009 | COLUMBIA RIVER VALLEY, WA | Meteorological | 9.0 m | — | 140 km |
| 1953 | COLUMBIA RIVER VALLEY, WA | Meteorological | 4.8 m | — | 56 km |
| 2009 | COLUMBIA RIVER VALLEY, WA | Meteorological | 3.6 m | — | 128 km |
| 1953 | COLUMBIA RIVER VALLEY, WA | Meteorological | — | — | 56 km |
| 1952 | COLUMBIA RIVER VALLEY, WA | Meteorological | — | — | 56 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 | 78 km |
| 2015 | TUNK BLOCK | 180,111 | 91 km |
| 2021 | SUMMIT TRAIL | 54,855 | 74 km |
| 2015 | STICKPIN | 54,119 | 21 km |
| 1985 | BARKER MT | 32,839 | 72 km |
| 2021 | WALKER CREEK | 26,165 | 54 km |
| 2014 | DEVILS ELBOW COMPLEX | 25,988 | 87 km |
| 1988 | WHITE MOUNTAIN | 21,855 | 53 km |
| 2020 | PALMER | 18,015 | 86 km |
| 1996 | TIMBERLINE COMPLEX | 17,009 | 97 km |
| 2023 | EAGLE BLUFF | 16,499 | 82 km |
| 2007 | TUNK GRADE | 15,007 | 87 km |
| 2015 | RENNER | 13,975 | 35 km |
| 2020 | KEWA FIELD | 11,811 | 96 km |
| 2000 | ROCKY HULL | 9,927 | 71 km |
| 1994 | COPPER BUTTE | 9,068 | 34 km |
| 2015 | GRAVES MOUNTAIN | 8,559 | 45 km |
| 1994 | UNNAMED | 8,385 | 85 km |
| 1988 | S.17MILE1 | 8,089 | 67 km |
| 2021 | BULLDOG MOUNTAIN | 8,049 | 30 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 22°F (-5°C) | 2.2 in | Coldest |
| February | 28°F (-2°C) | 1.6 in | |
| March | 36°F (2°C) | 1.6 in | |
| April | 44°F (6°C) | 1.7 in | |
| May | 52°F (11°C) | 2.2 in | |
| June | 58°F (15°C) | 2.4 in | |
| July | 64°F (18°C) | 1.5 in | |
| August | 64°F (18°C) | 1.5 in | Warmest |
| September | 55°F (13°C) | 1.3 in | Driest |
| October | 43°F (6°C) | 1.4 in | |
| November | 32°F (-0°C) | 2.3 in | |
| December | 23°F (-5°C) | 2.6 in | Wettest |
Grand Forks has a seasonal temperature swing of 42°F / from 22°F in January to 64°F in August. Total annual precipitation is 22.3 inches, with December being the wettest month (2.6") and September the driest (1.3").