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Weather & Climate in Castleford, ID
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Castleford experiences four distinct seasons with an average annual temperature of 48°F (9°C). Winters average 28°F in January while summers reach 71°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 10.7 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 3,874 feet.
Temperature
28°F Jan (-2°C)
71°F Jul (22°C)
| Annual Average | 48.1°F |
| 11% below US avg | |
| January Average | 28°F (-2°C) |
| July Average | 71°F (22°C) |
| Sunny Days | 302 days/yr |
Geography
| Elevation | 3,874 ft (1,181 m) |
| Area | 0.1 sq mi (0.2 km²) |
| Population Density | 1,660/sq mi |
| Coordinates | 42.5206°N, 114.8718°W |
| Timezone | America/Boise |
| County | Twin Falls County County |
| Nearest Airport | Joslin Field/Magic Valley Regional (TWF) 20 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 33.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 47.0 / 100 |
| Social Vulnerability | 24.9 / 100 |
| Community Resilience | 47.1 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Earthquake | Relatively Low |
| Wildfire | Relatively Moderate |
| Flood | Relatively Low |
| Hail | Very Low |
| Strong Wind | Relatively Low |
| Heat Wave | Relatively Moderate |
| Winter Weather | Relatively High |
| Lightning | Relatively Low |
| Ice Storm | Relatively Low |
| Drought | Very Low |
| Cold Wave | Relatively Low |
| Landslide | Relatively Moderate |
| Volcano | Very Low |
| Avalanche | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
126 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.1.
| Feb 27, 2008 | 13 km NE of Wells, Nevada | M4.1 | 148 km | 9 km |
| Apr 1, 2008 | 16 km NE of Wells, Nevada | M4.1 | 144 km | 10 km |
| Feb 26, 2008 | 11 km NE of Wells, Nevada | M4.0 | 147 km | 5 km |
| Feb 21, 2008 | 13 km NE of Wells, Nevada | M3.9 | 146 km | 4 km |
| Feb 21, 2008 | 13 km ENE of Wells, Nevada | M3.9 | 150 km | 3 km |
| Apr 22, 2008 | 17 km NE of Wells, Nevada | M3.8 | 145 km | 8 km |
| Jan 13, 1999 | 60 km NW of Wells, Nevada | M3.8 | 117 km | 5 km |
| Feb 18, 2009 | 13 km NNE of Wells, Nevada | M3.8 | 145 km | 10 km |
| Feb 21, 2008 | 14 km NE of Wells, Nevada | M3.6 | 147 km | 1 km |
| Feb 22, 2008 | 8 km NNE of Wells, Nevada | M3.6 | 149 km | 8 km |
| Mar 3, 2008 | 14 km NE of Wells, Nevada | M3.5 | 146 km | 6 km |
| Nov 4, 2002 | 37 km NE of Mountain Home, Idaho | M3.5 | 109 km | 5 km |
| Feb 29, 2008 | 20 km NE of Wells, Nevada | M3.5 | 144 km | 5 km |
| Mar 4, 2008 | 14 km NE of Wells, Nevada | M3.4 | 145 km | 4 km |
| Feb 26, 2008 | 12 km NE of Wells, Nevada | M3.4 | 149 km | 7 km |
| Feb 22, 2008 | 7 km NNE of Wells, Nevada | M3.4 | 150 km | 11 km |
| Feb 21, 2008 | 15 km NE of Wells, Nevada | M3.3 | 147 km | 3 km |
| Jul 23, 2000 | 64 km ESE of Owyhee, Nevada | M3.3 | 107 km | 0 km |
| Feb 28, 2008 | 10 km NNE of Wells, Nevada | M3.3 | 148 km | 6 km |
| Feb 23, 2008 | 20 km NNE of Wells, Nevada | M3.3 | 139 km | 8 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
47 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF2.
| Date | Rating | Distance | Path | Fatalities |
| May 18, 1991 | EF2 | 99 km | 0.2 mi | 0 |
| Jun 9, 1990 | EF2 | 40 km | 0.2 mi | 0 |
| Sep 11, 1968 | EF2 | 82 km | 0.5 mi | 0 |
| Jun 10, 1990 | EF1 | 28 km | 0.2 mi | 0 |
| Apr 20, 1988 | EF1 | 38 km | 1.0 mi | 0 |
| Apr 20, 1988 | EF1 | 52 km | 1.0 mi | 0 |
| Jul 21, 1987 | EF1 | 88 km | 0.2 mi | 0 |
| Aug 10, 1986 | EF1 | 60 km | 2.0 mi | 0 |
| Jun 24, 1986 | EF1 | 10 km | 0.5 mi | 0 |
| Sep 8, 1985 | EF1 | 41 km | 0.2 mi | 0 |
| May 2, 1985 | EF1 | 51 km | 0.1 mi | 0 |
| Jun 7, 1972 | EF1 | 98 km | 0.5 mi | 0 |
| Jul 5, 1961 | EF1 | 76 km | 5.1 mi | 0 |
| Jun 2, 1961 | EF1 | 93 km | 0.1 mi | 0 |
| Jun 5, 1957 | EF1 | 47 km | 0.1 mi | 0 |
| Jun 3, 1956 | EF1 | 43 km | 0.1 mi | 0 |
| Jul 25, 2024 | EF0 | 59 km | 0.6 mi | 0 |
| May 27, 2019 | EF0 | 80 km | 0.5 mi | 0 |
| May 7, 2019 | EF0 | 38 km | 1.5 mi | 0 |
| Jun 30, 2016 | EF0 | 45 km | 1.5 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Nearby Volcanoes
3 volcanoes within 200 km. Closest: Black Butte Crater Lava Field (85 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Black Butte Crater Lava Field | Shield | 1,478 m (4,849 ft) | -8400 | 85 km |
| Wapi Lava Field | Shield | 1,604 m (5,262 ft) | -300 | 141 km |
| Craters of the Moon | Pyroclastic cone(s) | 2,005 m (6,578 ft) | -130 | 150 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Wildfire History
20 wildfires (100+ acres) recorded within 100 km. Largest: MURPHY COMPLEX (567,409 acres, 2007).
| Year | Name | Acres Burned | Distance |
| 2007 | MURPHY COMPLEX | 567,409 | 55 km |
| 2010 | LONG BUTTE | 302,546 | 31 km |
| 2005 | CLOVER | 199,023 | 31 km |
| 1996 | RICHFIELDS | 178,385 | 96 km |
| 2012 | KINYON ROAD | 171,409 | 27 km |
| 2012 | FLAT TOP 2 | 102,340 | 97 km |
| 2018 | BRUNEAU | 87,679 | 76 km |
| 2020 | BADGER | 86,836 | 65 km |
| 2012 | CAVE CANYON | 84,780 | 67 km |
| 1995 | TUANA COMPLEX | 80,638 | 47 km |
| 1990 | THORN CREEK | 70,365 | 80 km |
| 2019 | POT HOLE | 67,826 | 48 km |
| 1987 | BROWNS CRK | 66,024 | 61 km |
| 2011 | BIG HILL | 65,416 | 75 km |
| 2007 | HIGHWAY 93 COMPLEX (WEST BASIN) | 63,143 | 76 km |
| 1985 | CROWS NEST | 62,780 | 40 km |
| 2006 | SAILOR CAP | 62,699 | 36 km |
| 1986 | BLUE BUTTE | 62,445 | 38 km |
| 2007 | MURPHY COMPLEX (SCOTT CREEK) | 59,642 | 65 km |
| 2000 | WEST BASIN | 56,396 | 76 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 28°F (-2°C) | 1.1 in | Coldest |
| February | 34°F (1°C) | 0.8 in | |
| March | 41°F (5°C) | 0.9 in | |
| April | 48°F (9°C) | 0.8 in | |
| May | 56°F (13°C) | 1.0 in | |
| June | 64°F (18°C) | 0.8 in | |
| July | 71°F (22°C) | 0.3 in | Warmest, Driest |
| August | 71°F (21°C) | 0.4 in | |
| September | 61°F (16°C) | 0.6 in | |
| October | 50°F (10°C) | 0.7 in | |
| November | 38°F (3°C) | 1.2 in | Wettest |
| December | 29°F (-2°C) | 1.0 in |
Castleford has a seasonal temperature swing of 43°F / from 28°F in January to 71°F in July. Total annual precipitation is 9.6 inches, with November being the wettest month (1.2") and July the driest (0.3").