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Weather & Climate in Grand Lake, CO
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Grand Lake has a cool climate with an average annual temperature of 37°F (3°C). Winters average 17°F in January while summers reach 58°F in July. The area gets 316 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 18.6 inches (drier than the 38-inch national average). The area receives 154.9 inches of snow annually, making winter weather a significant factor for residents. Air quality is rated Good with a median AQI of 41. The city sits at an elevation of 8,589 feet.
Temperature
17°F Jan (-8°C)
58°F Jul (14°C)
| Annual Average | 36.9°F |
| 32% below US avg | |
| January Average | 17°F (-8°C) |
| July Average | 58°F (14°C) |
| Sunny Days | 316 days/yr |
Geography
| Elevation | 8,589 ft (2,618 m) |
| Area | 1.1 sq mi (2.7 km²) |
| Population Density | 307/sq mi |
| Coordinates | 40.2559°N, 105.8289°W |
| Timezone | America/Denver |
| County | Boulder County County |
| Nearest Airport | Northern Colorado Regional (FNL) 45 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 41.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Moderate |
| Risk Score | 90.7 / 100 |
| Social Vulnerability | 11.4 / 100 |
| Community Resilience | 91.2 / 100 |
Hazard Breakdown
| Tornado | Relatively High |
| Earthquake | Relatively Low |
| Wildfire | Relatively High |
| Flood | Relatively Moderate |
| Hail | Relatively High |
| Strong Wind | Relatively High |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively High |
| Lightning | Very High |
| Ice Storm | Relatively Moderate |
| Drought | Relatively Low |
| Cold Wave | Relatively Moderate |
| Landslide | Relatively Moderate |
| Volcano | Very Low |
| Avalanche | Relatively High |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
55 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.0.
| Dec 25, 1994 | 9 km NE of Larkspur, Colorado | M4.0 | 138 km | 10 km |
| Aug 9, 2001 | 11 km NNE of Chacra, Colorado | M4.0 | 148 km | 5 km |
| Mar 19, 2022 | 5 km NW of Ryan Park, Wyoming | M3.8 | 137 km | 11 km |
| Jun 2, 2023 | 9 km SSE of Saratoga, Wyoming | M3.6 | 148 km | 1 km |
| Jun 6, 2011 | 17 km NNW of Oak Creek, Colorado | M3.5 | 103 km | 5 km |
| Apr 10, 2011 | 12 km N of Oak Creek, Colorado | M3.4 | 95 km | 5 km |
| Aug 21, 2012 | 12 km SSW of Gypsum, Colorado | M3.4 | 127 km | 5 km |
| Sep 14, 2024 | 9 km SSE of Saratoga, Wyoming | M3.4 | 148 km | 10 km |
| Jan 18, 1997 | 8 km SE of Westcreek, Colorado | M3.3 | 143 km | 5 km |
| May 4, 2015 | 5 km SSW of Encampment, Wyoming | M3.3 | 131 km | 5 km |
| Mar 29, 2022 | 10 km NNW of Ryan Park, Wyoming | M3.3 | 142 km | 5 km |
| Jun 3, 2023 | 8 km SSE of Saratoga, Wyoming | M3.3 | 148 km | 12 km |
| Jan 15, 2009 | 29 km SSW of Encampment, Wyoming | M3.2 | 121 km | 5 km |
| Jun 1, 2014 | 9 km NNW of Kersey, Colorado | M3.2 | 106 km | 1 km |
| Jul 8, 1993 | 9 km ENE of Aspen, Colorado | M3.1 | 137 km | 5 km |
| Jul 22, 2001 | 6 km WNW of Woodland Park, Colorado | M3.1 | 150 km | 5 km |
| Sep 2, 2024 | 21 km NW of Steamboat Springs, Colorado | M3.1 | 109 km | 2 km |
| Sep 12, 1990 | 13 km NW of Silverthorne, Colorado | M3.0 | 70 km | 5 km |
| Feb 7, 2000 | 19 km NE of Steamboat Springs, Colorado | M3.0 | 81 km | 5 km |
| Feb 26, 2008 | 29 km WNW of Westcreek, Colorado | M2.9 | 113 km | 2 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
212 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF3. Total: 1 fatality, 143 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Jun 4, 2015 | EF3 | 64 km | 6.7 mi | 0 |
| May 22, 2008 | EF3 | 92 km | 38.7 mi | 1 |
| Jun 15, 1988 | EF3 | 96 km | 2.5 mi | 0 |
| Jun 7, 2021 | EF2 | 80 km | 7.5 mi | 0 |
| May 22, 2008 | EF2 | 95 km | 25.1 mi | 0 |
| Jun 9, 1990 | EF2 | 89 km | 23.0 mi | 0 |
| Jun 15, 1988 | EF2 | 96 km | 0.5 mi | 0 |
| Jun 5, 1988 | EF2 | 78 km | 2.0 mi | 0 |
| Jun 5, 1988 | EF2 | 73 km | 0.5 mi | 0 |
| Jun 8, 1986 | EF2 | 99 km | 1.1 mi | 0 |
| May 18, 1984 | EF2 | 100 km | 5.0 mi | 0 |
| Jun 3, 1981 | EF2 | 89 km | 0.1 mi | 0 |
| Jun 3, 1981 | EF2 | 84 km | 2.3 mi | 0 |
| Oct 15, 1980 | EF2 | 58 km | 1.5 mi | 0 |
| Jun 4, 1976 | EF2 | 73 km | 0.5 mi | 0 |
| Jun 4, 1976 | EF2 | 86 km | 1.5 mi | 0 |
| May 30, 1976 | EF2 | 95 km | 5.4 mi | 0 |
| Jun 8, 1958 | EF2 | 98 km | 7.1 mi | 0 |
| May 30, 1957 | EF2 | 80 km | 9.1 mi | 0 |
| May 30, 1957 | EF2 | 81 km | 1.3 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Wildfire History
20 wildfires (100+ acres) recorded within 100 km. Largest: CAMERON PEAK (208,910 acres, 2020).
| Year | Name | Acres Burned | Distance |
| 2020 | CAMERON PEAK | 208,910 | 47 km |
| 2020 | EAST TROUBLESOME | 188,924 | 14 km |
| 2012 | HIGH PARK | 90,769 | 60 km |
| 2016 | BEAVER CREEK | 44,221 | 97 km |
| 2020 | MIDDLE FORK | 20,886 | 90 km |
| 2018 | BADGER CREEK | 20,752 | 92 km |
| 2018 | SILVER CREEK | 20,725 | 64 km |
| 2002 | MT. ZIRKEL COMPLEX (BURN RIDGE) | 15,478 | 89 km |
| 2020 | WILLIAMS FORK | 14,679 | 49 km |
| 2000 | BOBCAT | 10,444 | 51 km |
| 2020 | CALWOOD | 9,836 | 44 km |
| 2004 | PICNIC ROCK | 9,014 | 72 km |
| 2021 | MORGAN CREEK | 7,710 | 97 km |
| 2021 | MARSHALL | 6,286 | 64 km |
| 2010 | FOURMILE CANYON | 5,865 | 44 km |
| 2021 | MUDDY SLIDE | 4,372 | 79 km |
| 2002 | BIG ELK | 4,348 | 35 km |
| 2002 | GREEN CREEK | 4,342 | 72 km |
| 2003 | OVERLAND | 3,232 | 43 km |
| 2009 | OLD STAGE | 3,160 | 50 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 17°F (-8°C) | 1.9 in | Coldest |
| February | 19°F (-8°C) | 1.7 in | |
| March | 22°F (-6°C) | 2.4 in | |
| April | 28°F (-3°C) | 2.8 in | Wettest |
| May | 37°F (3°C) | 2.5 in | |
| June | 46°F (8°C) | 2.1 in | |
| July | 58°F (14°C) | 2.3 in | Warmest |
| August | 52°F (11°C) | 2.2 in | |
| September | 45°F (7°C) | 1.9 in | |
| October | 36°F (2°C) | 1.6 in | Driest |
| November | 24°F (-4°C) | 1.8 in | |
| December | 18°F (-8°C) | 1.9 in |
Grand Lake has a seasonal temperature swing of 40°F / from 17°F in January to 58°F in July. Total annual precipitation is 24.8 inches, with April being the wettest month (2.8") and October the driest (1.6").