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. The area gets 302 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 11.3 inches (drier than the 38-inch national average). The area receives 37.4 inches of snow annually, a moderate snowfall amount. Air quality is rated Good with a median AQI of 33. 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)
Sunny Days	302 days/yr

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

Annual Rainfall 11.3"

70% below US avg

Snowfall 37.4"

Wettest Month (May) 1.69"

Driest Month (Dec) 0.98"

Air Quality

AQI Median	33.0
Rating	Good

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)	1.1 in	Coldest
February	22°F (-6°C)	1.0 in
March	29°F (-2°C)	1.0 in
April	38°F (3°C)	1.2 in
May	47°F (8°C)	1.7 in	Wettest
June	55°F (13°C)	1.2 in
July	66°F (19°C)	1.1 in	Warmest
August	61°F (16°C)	1.1 in
September	53°F (11°C)	1.3 in
October	42°F (6°C)	1.3 in
November	30°F (-1°C)	1.2 in
December	21°F (-6°C)	1.0 in	Driest

St. Charles has a seasonal temperature swing of 48°F / from 18°F in January to 66°F in July. Total annual precipitation is 14.2 inches, with May being the wettest month (1.7") and December the driest (1.0").

View full profile of St. Charles, ID →