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Weather & Climate in Hollister, ID
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Hollister experiences four distinct seasons with an average annual temperature of 49°F (10°C). Winters average 29°F in January while summers reach 73°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 10.3 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 4,525 feet.
Temperature
29°F Jan (-2°C)
73°F Jul (23°C)
| Annual Average | 49.1°F |
| 9% below US avg | |
| January Average | 29°F (-2°C) |
| July Average | 73°F (23°C) |
| Sunny Days | 302 days/yr |
Geography
| Elevation | 4,525 ft (1,379 m) |
| Area | 1.1 sq mi (2.8 km²) |
| Population Density | 330/sq mi |
| Coordinates | 42.3529°N, 114.5838°W |
| Timezone | America/Boise |
| County | Twin Falls County County |
| Nearest Airport | Joslin Field/Magic Valley Regional (TWF) 10 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
315 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M5.9.
| Feb 21, 2008 | 8 km ENE of Wells, Nevada | M5.9 | 137 km | 8 km |
| Feb 21, 2008 | 10 km ENE of Wells, Nevada | M5.1 | 137 km | 0 km |
| Feb 22, 2008 | 4 km ENE of Wells, Nevada | M4.8 | 139 km | 11 km |
| Nov 4, 1992 | 67 km ENE of Montello, Nevada | M4.7 | 131 km | 9 km |
| Feb 21, 2008 | 5 km E of Wells, Nevada | M4.6 | 140 km | 7 km |
| Feb 21, 2008 | 4 km NE of Wells, Nevada | M4.6 | 137 km | 13 km |
| Feb 23, 2008 | 9 km NE of Wells, Nevada | M4.3 | 135 km | 11 km |
| Feb 22, 2008 | 5 km E of Wells, Nevada | M4.3 | 140 km | 12 km |
| Feb 21, 2008 | 5 km ENE of Wells, Nevada | M4.1 | 138 km | 5 km |
| Feb 25, 2008 | 6 km ESE of Wells, Nevada | M4.1 | 142 km | 8 km |
| Feb 24, 2008 | 6 km E of Wells, Nevada | M4.1 | 139 km | 0 km |
| Feb 27, 2008 | 6 km ESE of Wells, Nevada | M4.1 | 142 km | 9 km |
| Apr 1, 2008 | 16 km NE of Wells, Nevada | M4.1 | 127 km | 10 km |
| Feb 27, 2008 | 13 km NE of Wells, Nevada | M4.1 | 131 km | 9 km |
| Feb 26, 2008 | 11 km NE of Wells, Nevada | M4.0 | 131 km | 5 km |
| Feb 25, 2008 | 4 km ENE of Wells, Nevada | M4.0 | 139 km | 9 km |
| Feb 28, 2008 | 5 km NE of Wells, Nevada | M4.0 | 136 km | 8 km |
| Feb 21, 2008 | 13 km ENE of Wells, Nevada | M3.9 | 132 km | 3 km |
| Feb 21, 2008 | 13 km NE of Wells, Nevada | M3.9 | 130 km | 4 km |
| Feb 22, 2008 | 6 km NNE of Wells, Nevada | M3.9 | 136 km | 12 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
45 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF2.
| Date | Rating | Distance | Path | Fatalities |
| May 18, 1991 | EF2 | 81 km | 0.2 mi | 0 |
| Jun 9, 1990 | EF2 | 43 km | 0.2 mi | 0 |
| Sep 11, 1968 | EF2 | 68 km | 0.5 mi | 0 |
| Jun 10, 1990 | EF1 | 50 km | 0.2 mi | 0 |
| Apr 20, 1988 | EF1 | 71 km | 1.0 mi | 0 |
| Apr 20, 1988 | EF1 | 40 km | 1.0 mi | 0 |
| Jul 21, 1987 | EF1 | 92 km | 0.2 mi | 0 |
| Aug 10, 1986 | EF1 | 89 km | 2.0 mi | 0 |
| Jun 24, 1986 | EF1 | 34 km | 0.5 mi | 0 |
| Sep 8, 1985 | EF1 | 32 km | 0.2 mi | 0 |
| May 2, 1985 | EF1 | 64 km | 0.1 mi | 0 |
| Jun 7, 1972 | EF1 | 83 km | 0.5 mi | 0 |
| Jun 5, 1957 | EF1 | 29 km | 0.1 mi | 0 |
| Jun 3, 1956 | EF1 | 63 km | 0.1 mi | 0 |
| Jul 25, 2024 | EF0 | 89 km | 0.6 mi | 0 |
| May 26, 2023 | EF0 | 94 km | 0.2 mi | 0 |
| Aug 2, 2019 | EF0 | 90 km | 1.0 mi | 0 |
| May 7, 2019 | EF0 | 18 km | 1.5 mi | 0 |
| Jun 30, 2016 | EF0 | 48 km | 1.5 mi | 0 |
| May 8, 2013 | EF0 | 52 km | 1.0 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 (94 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Black Butte Crater Lava Field | Shield | 1,478 m (4,849 ft) | -8400 | 94 km |
| Wapi Lava Field | Shield | 1,604 m (5,262 ft) | -300 | 126 km |
| Craters of the Moon | Pyroclastic cone(s) | 2,005 m (6,578 ft) | -130 | 148 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 | 64 km |
| 2010 | LONG BUTTE | 302,546 | 60 km |
| 2005 | CLOVER | 199,023 | 60 km |
| 1996 | RICHFIELDS | 178,385 | 94 km |
| 2012 | KINYON ROAD | 171,409 | 56 km |
| 2007 | WINECUP COMPLEX (WEST FORK) | 159,805 | 74 km |
| 2018 | GOOSE CREEK | 131,432 | 93 km |
| 2012 | FLAT TOP 2 | 102,340 | 93 km |
| 2018 | BRUNEAU | 87,679 | 89 km |
| 2020 | BADGER | 86,836 | 36 km |
| 2012 | CAVE CANYON | 84,780 | 39 km |
| 1995 | TUANA COMPLEX | 80,638 | 70 km |
| 1990 | THORN CREEK | 70,365 | 94 km |
| 2019 | POT HOLE | 67,826 | 76 km |
| 1987 | BROWNS CRK | 66,024 | 91 km |
| 2007 | HIGHWAY 93 COMPLEX (WEST BASIN) | 63,143 | 51 km |
| 1985 | CROWS NEST | 62,780 | 68 km |
| 2006 | SAILOR CAP | 62,699 | 64 km |
| 1986 | BLUE BUTTE | 62,445 | 68 km |
| 2007 | MURPHY COMPLEX (SCOTT CREEK) | 59,642 | 52 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 29°F (-2°C) | 1.0 in | |
| February | 32°F (0°C) | 0.6 in | |
| March | 39°F (4°C) | 0.8 in | |
| April | 46°F (8°C) | 0.8 in | |
| May | 53°F (12°C) | 1.3 in | Wettest |
| June | 62°F (17°C) | 0.9 in | |
| July | 73°F (23°C) | 0.4 in | Warmest, Driest |
| August | 69°F (21°C) | 0.4 in | |
| September | 60°F (15°C) | 0.7 in | |
| October | 49°F (10°C) | 0.8 in | |
| November | 37°F (3°C) | 1.0 in | |
| December | 28°F (-2°C) | 0.8 in | Coldest |
Hollister has a seasonal temperature swing of 45°F / from 28°F in December to 73°F in July. Total annual precipitation is 9.6 inches, with May being the wettest month (1.3") and July the driest (0.4").