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Weather & Climate in Macpherson-Grizzly Valley, YT
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Macpherson-Grizzly Valley has a cool climate with an average annual temperature of 27°F (-3°C). Winters average -0°F in January while summers reach 53°F in July. The area gets 317 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 10.7 inches (drier than the 38-inch national average). The area receives 3.9 inches of snow annually. The city sits at an elevation of 5,098 feet.
Temperature
-0°F Jan (-18°C)
53°F Jul (12°C)
| Annual Average | 26.9°F |
| 50% below US avg | |
| January Average | -0°F (-18°C) |
| July Average | 53°F (12°C) |
| Sunny Days | 317 days/yr |
Geography
| Elevation | 5,098 ft (1,554 m) |
| Area | 708.2 sq mi (1,834.3 km²) |
| Population Density | 2/sq mi |
| Coordinates | 61.0041°N, 135.4498°W |
| Timezone | America/Whitehorse |
Precipitation & Snow
Air Quality
Earthquake History
228 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M6.3.
| May 1, 2017 | 48 km NW of Mosquito Lake, Alaska | M6.3 | 148 km | 3 km |
| May 1, 2017 | 47 km NW of Mosquito Lake, Alaska | M6.2 | 149 km | 10 km |
| May 1, 2017 | 57 km NW of Mosquito Lake, Alaska | M5.0 | 147 km | 8 km |
| Sep 16, 2017 | 54 km NW of Mosquito Lake, Alaska | M5.0 | 147 km | 7 km |
| May 1, 2017 | 43 km NW of Mosquito Lake, Alaska | M5.0 | 150 km | 12 km |
| Mar 9, 1992 | 38 km WNW of Haines Junction, Canada | M4.7 | 144 km | 10 km |
| May 4, 2017 | 45 km NW of Mosquito Lake, Alaska | M4.7 | 150 km | 10 km |
| Sep 11, 1999 | 56 km SSE of Haines Junction, Canada | M4.6 | 115 km | 10 km |
| Apr 4, 1990 | 83 km NW of Whitehorse, Canada | M4.6 | 44 km | 10 km |
| Aug 3, 2000 | 58 km SE of Haines Junction, Canada | M4.3 | 93 km | 10 km |
| May 1, 2017 | 49 km NW of Mosquito Lake, Alaska | M4.3 | 144 km | 5 km |
| May 1, 2017 | Southeastern Alaska | M4.1 | 146 km | 10 km |
| May 1, 2017 | 48 km NW of Mosquito Lake, Alaska | M4.1 | 142 km | 10 km |
| Jan 12, 2004 | 48 km NW of Haines Junction, Canada | M4.0 | 141 km | 1 km |
| Jun 22, 2017 | 38 km NW of Mosquito Lake, Alaska | M4.0 | 149 km | 3 km |
| Jul 21, 2017 | 49 km NW of Mosquito Lake, Alaska | M3.9 | 145 km | 8 km |
| May 2, 2017 | 48 km NW of Mosquito Lake, Alaska | M3.9 | 149 km | 7 km |
| Apr 3, 2018 | 44 km SSW of Haines Junction, Canada | M3.9 | 147 km | 5 km |
| May 5, 2017 | 42 km NW of Mosquito Lake, Alaska | M3.9 | 149 km | 4 km |
| May 1, 2017 | 49 km NW of Mosquito Lake, Alaska | M3.9 | 145 km | 4 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tsunami History
2 tsunamis recorded within 500 km. Highest wave on record: 2.5 m (8 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 2024 | WHITEHORSE, YUKON | Meteorological | 2.5 m | — | 16 km |
| 2017 | SKAGWAY, AK | Earthquake | 0.1 m | — | 149 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
2 volcanoes within 200 km. Closest: Alligator Lake (65 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Alligator Lake | Volcanic field | 2,217 m (7,274 ft) | Unknown | 65 km |
| Atlin Volcanic Field | Pyroclastic cone(s) | 1,880 m (6,168 ft) | Unknown | 188 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | -0°F (-18°C) | 0.7 in | Coldest |
| February | 5°F (-15°C) | 0.5 in | |
| March | 13°F (-10°C) | 0.4 in | |
| April | 27°F (-3°C) | 0.2 in | Driest |
| May | 39°F (4°C) | 0.7 in | |
| June | 49°F (9°C) | 1.4 in | |
| July | 53°F (12°C) | 2.0 in | Warmest, Wettest |
| August | 50°F (10°C) | 1.6 in | |
| September | 41°F (5°C) | 1.2 in | |
| October | 29°F (-2°C) | 0.7 in | |
| November | 12°F (-11°C) | 0.7 in | |
| December | 4°F (-16°C) | 0.8 in |
Macpherson-Grizzly Valley has a seasonal temperature swing of 53°F / from -0°F in January to 53°F in July. Total annual precipitation is 10.7 inches, with July being the wettest month (2.0") and April the driest (0.2").