Weather & Climate in St. Charles, ID
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
St. Charles has a cool climate with an average annual temperature of 41°F (5°C). Winters average 18°F in January while summers reach 66°F in July. Annual precipitation totals 11.3 inches (drier than the 38-inch national average). The area receives 37.4 inches of snow annually, a moderate snowfall amount. The city sits at an elevation of 5,963 feet.
Temperature
18°F Jan (-8°C)
66°F Jul (19°C)
| Annual Average | 41.0°F |
| 24% below US avg | |
| January Average | 18°F (-8°C) |
| July Average | 66°F (19°C) |
Geography
| Elevation | 5,963 ft (1,818 m) |
| Area | 0.6 sq mi (1.6 km²) |
| Population Density | 230/sq mi |
| Coordinates | 42.1118°N, 111.3903°W |
| Timezone | America/Boise |
| County | Bear Lake County County |
| Nearest Airport | Brigham City Regional (BMC) 52 miles away |
Precipitation & Snow
Air Quality
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 6.6 / 100 |
| Social Vulnerability | 10.6 / 100 |
| Community Resilience | 42.9 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Earthquake | Relatively Low |
| Wildfire | Relatively Low |
| Flood | Very Low |
| Hail | Very Low |
| Strong Wind | Very Low |
| Heat Wave | Very Low |
| Winter Weather | Relatively Low |
| Lightning | Relatively Low |
| Ice Storm | Very Low |
| Drought | Very Low |
| Cold Wave | Very Low |
| Landslide | Relatively Low |
| Volcano | Very Low |
| Avalanche | Relatively Moderate |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
1,342 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M5.8.
| Feb 3, 1994 | 4 km SSE of Auburn, Wyoming | M5.8 | 80 km | 8 km |
| Sep 2, 2017 | 12 km E of Soda Springs, Idaho | M5.3 | 60 km | 10 km |
| Apr 21, 2001 | 29 km WSW of Freedom, Idaho | M5.3 | 90 km | 1 km |
| Sep 10, 2017 | 9 km NNW of Georgetown, Idaho | M5.0 | 50 km | 10 km |
| Apr 15, 2010 | 9 km NE of Randolph, Utah | M4.9 | 51 km | 10 km |
| Aug 27, 2016 | 4 km ENE of Bondurant, Wyoming | M4.8 | 150 km | 12 km |
| Feb 11, 1994 | 3 km SSE of Auburn, Wyoming | M4.8 | 79 km | 5 km |
| Sep 10, 2017 | 12 km ESE of Soda Springs, Idaho | M4.7 | 56 km | 5 km |
| Sep 3, 2017 | 15 km ESE of Soda Springs, Idaho | M4.7 | 56 km | 10 km |
| Sep 11, 2017 | 9 km NW of Georgetown, Idaho | M4.7 | 49 km | 8 km |
| Sep 3, 2017 | 10 km E of Soda Springs, Idaho | M4.7 | 59 km | 8 km |
| Feb 4, 1994 | 4 km WNW of Fairview, Wyoming | M4.7 | 73 km | 5 km |
| Sep 6, 2017 | 11 km NNW of Georgetown, Idaho | M4.6 | 51 km | 10 km |
| Feb 7, 1994 | 4 km SW of Fairview, Wyoming | M4.5 | 68 km | 5 km |
| Sep 4, 2017 | 13 km ESE of Soda Springs, Idaho | M4.5 | 57 km | 6 km |
| Feb 3, 1994 | 0 km NNE of Auburn, Wyoming | M4.4 | 83 km | 5 km |
| Feb 3, 1994 | 13 km WSW of Auburn, Wyoming | M4.4 | 72 km | 5 km |
| Jan 26, 2018 | 5 km NNW of Georgetown, Idaho | M4.4 | 47 km | 10 km |
| Feb 10, 1994 | 3 km WSW of Auburn, Wyoming | M4.4 | 80 km | 5 km |
| Feb 3, 1994 | 2 km SW of Auburn, Wyoming | M4.4 | 80 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Tornado History
29 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF1. Total: 6 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Aug 20, 1998 | EF1 | 99 km | 0.1 mi | 0 |
| Sep 17, 1989 | EF1 | 49 km | 0.2 mi | 0 |
| May 29, 1987 | EF1 | 41 km | 0.2 mi | 0 |
| May 21, 1986 | EF1 | 44 km | 0.5 mi | 0 |
| May 21, 1986 | EF1 | 78 km | 5.0 mi | 0 |
| Aug 18, 1983 | EF1 | 97 km | 2.5 mi | 0 |
| Jun 30, 1982 | EF1 | 40 km | 1.2 mi | 0 |
| May 6, 1981 | EF1 | 57 km | 0.5 mi | 0 |
| Jul 24, 1980 | EF1 | 79 km | 0.1 mi | 0 |
| Jun 23, 1965 | EF1 | 71 km | 0.6 mi | 0 |
| May 25, 1954 | EF1 | 33 km | 0.5 mi | 0 |
| Jun 23, 2023 | EF0 | 65 km | 0.2 mi | 0 |
| Jul 31, 2016 | EF0 | 67 km | 1.7 mi | 0 |
| Jul 7, 2013 | EF0 | 15 km | 1.0 mi | 0 |
| May 3, 2009 | EF0 | 95 km | 1.0 mi | 0 |
| Sep 5, 2007 | EF0 | 76 km | 7.5 mi | 0 |
| Jul 25, 2007 | EF0 | 67 km | 0.3 mi | 0 |
| May 29, 2005 | EF0 | 92 km | 0.5 mi | 0 |
| Jun 10, 1998 | EF0 | 24 km | 0.1 mi | 0 |
| May 5, 1995 | EF0 | 32 km | 0.1 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950-2024, US only).
Tsunami History
1 tsunami recorded within 500 km. Highest wave on record: 3.6 m (12 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1909 | UTAH | Earthquake | 3.6 m | - | 114 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
2 volcanoes within 200 km. Closest: Wapi Lava Field (173 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Wapi Lava Field | Shield | 1,604 m (5,262 ft) | -300 | 173 km |
| Hell's Half Acre | Shield | 1,631 m (5,351 ft) | -3250 | 177 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Wildfire History
20 wildfires (100+ acres) recorded within 100 km. Largest: FONTENELLE (58,125 acres, 2012).
| Year | Name | Acres Burned | Distance |
| 2012 | FONTENELLE | 58,125 | 86 km |
| 1994 | ELEVATOR | 31,854 | 82 km |
| 2013 | STATE | 31,011 | 79 km |
| 2016 | BROAD MOUTH | 21,009 | 80 km |
| 2007 | CLEVELAND | 16,172 | 38 km |
| 1999 | BRIDGER BA | 15,227 | 62 km |
| 2000 | FONTENELLE | 14,894 | 67 km |
| 2018 | GORING | 14,538 | 85 km |
| 2018 | NORTH EDEN | 14,398 | 32 km |
| 2007 | RED CANYON RX BURN-H | 13,464 | 69 km |
| 2000 | TAYLOR | 12,633 | 98 km |
| 1988 | METCALF | 11,946 | 88 km |
| 1994 | DRY CANYON 2 | 10,927 | 52 km |
| 1994 | HANSEL VALLEY MT. | 8,695 | 99 km |
| 1998 | POCATELLO VALLEY | 8,483 | 96 km |
| 1994 | JOHNSON CANYON | 8,244 | 80 km |
| 2010 | POLE CREEK STANDS | 6,900 | 57 km |
| 1991 | HANSEL MOUNTAIN | 6,389 | 97 km |
| 2018 | MARTEN CREEK | 6,383 | 92 km |
| 2006 | BASIN | 6,103 | 98 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 18°F (-8°C) | 0.8 in | Coldest |
| February | 20°F (-7°C) | 0.8 in | |
| March | 29°F (-2°C) | 0.8 in | |
| April | 40°F (4°C) | 1.1 in | |
| May | 49°F (10°C) | 1.8 in | Wettest |
| June | 58°F (15°C) | 0.9 in | |
| July | 66°F (19°C) | 0.6 in | Warmest, Driest |
| August | 64°F (18°C) | 0.8 in | |
| September | 55°F (13°C) | 1.1 in | |
| October | 43°F (6°C) | 1.1 in | |
| November | 31°F (-1°C) | 0.8 in | |
| December | 20°F (-6°C) | 0.8 in |
St. Charles has a seasonal temperature swing of 48°F / from 18°F in January to 66°F in July. Total annual precipitation is 11.3 inches, with May being the wettest month (1.8") and July the driest (0.6").