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Weather & Climate in Rupert, ID

Temperature, precipitation, air quality, natural hazards, and monthly weather data.

Rupert experiences four distinct seasons with an average annual temperature of 47°F (8°C). Winters average 26°F in January while summers reach 70°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 10.8 inches (drier than the 38-inch national average). Air quality is rated Good with a median AQI of 33. The city sits at an elevation of 4,158 feet.

Temperature

26°F Jan (-3°C) 70°F Jul (21°C)
Annual Average47.0°F
13% below US avg
January Average26°F (-3°C)
July Average70°F (21°C)
Sunny Days302 days/yr

Geography

Elevation4,158 ft (1,267 m)
Area2.1 sq mi (5.3 km²)
Population Density2,989/sq mi
Coordinates42.6189°N, 113.6740°W
TimezoneAmerica/Boise
CountyMinidoka County County
Nearest AirportJoslin Field/Magic Valley Regional (TWF)
42 miles away

Precipitation & Snow

Annual Rainfall 10.8"
72% below US avg
Wettest Month (May) 1.14"
Driest Month (Jul) 0.39"

Air Quality

AQI Median33.0
RatingGood

Natural Hazard Risk

Overall RiskVery Low
Risk Score20.5 / 100
Social Vulnerability31.7 / 100
Community Resilience5.6 / 100

Hazard Breakdown

Tornado Very Low
Earthquake Relatively Low
Wildfire Very Low
Flood Very Low
Hail Very Low
Strong Wind Relatively Low
Heat Wave Relatively Low
Winter Weather Relatively Moderate
Lightning Relatively Low
Ice Storm Very Low
Drought Very Low
Cold Wave Relatively Low
Landslide Very Low
Volcano Very Low
Source: FEMA National Risk Index v1.20 (Dec 2025)

Earthquake History

78 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.7.

Nov 4, 1992 67 km ENE of Montello, Nevada M4.7 123 km 9 km
Sep 24, 2019 5 km ENE of Howell, Utah M3.9 138 km 7 km
Jun 28, 1990 11 km NNE of Howell, Utah M3.8 132 km 6 km
Aug 30, 2000 9 km ENE of Snowville, Utah M3.6 111 km 7 km
Jul 3, 1993 7 km SSW of Malad City, Idaho M3.6 126 km 9 km
Nov 4, 1992 49 km SW of Snowville, Utah M3.6 123 km 13 km
Feb 1, 2008 6 km WNW of Riverside, Utah M3.5 150 km 9 km
Apr 24, 1998 10 km NE of Howell, Utah M3.5 138 km 11 km
May 6, 2013 2 km NNE of Lava Hot Springs, Idaho M3.5 137 km 5 km
Jan 24, 1990 14 km WSW of Howell, Utah M3.5 129 km 6 km
Apr 6, 2021 47 km SW of Howell, Utah M3.5 140 km 11 km
Jul 5, 1996 7 km WNW of Thatcher, Utah M3.4 146 km 4 km
Sep 23, 1993 7 km SSW of Malad City, Idaho M3.2 126 km 6 km
Feb 1, 2003 7 km NW of Riverside, Utah M3.2 149 km 4 km
May 29, 2013 11 km ENE of Howell, Utah M3.1 141 km 1 km
Dec 17, 1992 30 km WSW of Mackay, Idaho M3.1 135 km 5 km
May 3, 2020 17 km W of Portage, Utah M3.1 124 km 7 km
Jun 15, 2008 15 km WSW of Howell, Utah M3.1 132 km 9 km
May 6, 1994 5 km E of Howell, Utah M3.1 141 km 2 km
Jan 24, 2020 7 km E of Howell, UT M3.1 142 km 7 km
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.

Tornado History

71 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF2.

Date Rating Distance Path Fatalities
May 18, 1991 EF2 0 km 0.2 mi 0
Aug 17, 1990 EF2 71 km 4.0 mi 0
Jun 9, 1990 EF2 67 km 0.2 mi 0
Sep 11, 1968 EF2 21 km 0.5 mi 0
Jul 20, 1999 EF1 88 km 2.5 mi 0
Jun 10, 1990 EF1 95 km 0.2 mi 0
Apr 20, 1988 EF1 98 km 1.0 mi 0
Apr 20, 1988 EF1 67 km 1.0 mi 0
Jul 21, 1987 EF1 69 km 0.2 mi 0
Jul 18, 1987 EF1 95 km 1.0 mi 0
Aug 24, 1986 EF1 56 km 0.5 mi 0
Jun 24, 1986 EF1 94 km 0.5 mi 0
Sep 8, 1985 EF1 58 km 0.2 mi 0
May 2, 1985 EF1 82 km 0.1 mi 0
Jul 17, 1981 EF1 65 km 0.8 mi 0
Jun 7, 1972 EF1 11 km 0.5 mi 0
May 26, 1964 EF1 93 km 0.5 mi 0
Jun 5, 1957 EF1 53 km 0.1 mi 0
Jun 3, 1956 EF1 97 km 0.1 mi 0
May 26, 2023 EF0 60 km 0.2 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 — 121 km
Source: NOAA/NCEI Historical Tsunami Database.

Nearby Volcanoes

4 volcanoes within 200 km. Closest: Wapi Lava Field (47 km).

Name Type Elevation Last Eruption Distance
Wapi Lava Field Shield 1,604 m (5,262 ft) -300 47 km
Black Butte Crater Lava Field Shield 1,478 m (4,849 ft) -8400 84 km
Craters of the Moon Pyroclastic cone(s) 2,005 m (6,578 ft) -130 90 km
Hell's Half Acre Shield 1,631 m (5,351 ft) -3250 140 km
Source: Smithsonian Institution Global Volcanism Program (GVP).

Wildfire History

20 wildfires (100+ acres) recorded within 100 km. Largest: COXS WELL (219,424 acres, 1996).

Year Name Acres Burned Distance
1996 COXS WELL 219,424 78 km
2006 CRYSTAL 218,581 68 km
1996 RICHFIELDS 178,385 52 km
1992 BLACK RIDGE 147,833 54 km
1999 MULE BUTTE 138,102 58 km
2012 FLAT TOP 2 102,340 47 km
2020 BADGER 86,836 58 km
2012 CAVE CANYON 84,780 51 km
2000 COFFEE POINT 73,480 95 km
1990 THORN CREEK 70,365 94 km
2007 BLACK PINE 2 69,897 59 km
2000 FLATTOP 56,792 63 km
2000 WEST BASIN 56,396 87 km
2017 POWERLINE 54,378 88 km
2006 STONE 2 50,677 92 km
2017 MAMMOTH CAVE 50,391 73 km
2005 RUPERT 45,361 40 km
2007 RED BRIDGE 44,096 60 km
2016 LAIDLAW 40,551 62 km
2017 SHOESTRING 35,543 79 km
Source: NIFC/IRWIN Wildfire Records (100+ acres).

Monthly Weather

Month Avg Temperature Precipitation Summary
January 26°F (-3°C) 1.0 in Coldest
February 32°F (0°C) 0.7 in
March 39°F (4°C) 0.9 in
April 47°F (8°C) 0.9 in
May 55°F (13°C) 1.1 in Wettest
June 63°F (17°C) 0.9 in
July 70°F (21°C) 0.4 in Warmest, Driest
August 69°F (20°C) 0.5 in
September 59°F (15°C) 0.6 in
October 49°F (9°C) 0.6 in
November 36°F (2°C) 1.1 in
December 28°F (-2°C) 1.0 in

Rupert has a seasonal temperature swing of 44°F / from 26°F in January to 70°F in July. Total annual precipitation is 9.8 inches, with May being the wettest month (1.1") and July the driest (0.4").

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