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Weather & Climate in Floriston, CA
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Floriston has a cool climate with an average annual temperature of 44°F (7°C). Winters average 29°F in January while summers reach 63°F in July. The area gets 326 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 22.5 inches (drier than the 38-inch national average). The area receives 98.4 inches of snow annually, making winter weather a significant factor for residents. Air quality is rated Good with a median AQI of 48. The city sits at an elevation of 6,422 feet.
Temperature
29°F Jan (-2°C)
63°F Jul (17°C)
| Annual Average | 44.3°F |
| 18% below US avg | |
| January Average | 29°F (-2°C) |
| July Average | 63°F (17°C) |
| Sunny Days | 326 days/yr |
Geography
| Elevation | 6,422 ft (1,957 m) |
| Area | 1.0 sq mi (2.5 km²) |
| Population Density | 23/sq mi |
| Coordinates | 39.3929°N, 120.0151°W |
| Timezone | America/Los_Angeles |
| County | Sierra County County |
| Nearest Airport | Reno/Tahoe International (RNO) 15 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 48.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 31.5 / 100 |
| Social Vulnerability | 63.2 / 100 |
| Community Resilience | 31.4 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Earthquake | Relatively Low |
| Wildfire | Relatively Moderate |
| Flood | Relatively Low |
| Hail | Very Low |
| Strong Wind | Very Low |
| Heat Wave | Very Low |
| Winter Weather | Relatively Low |
| Lightning | Relatively Moderate |
| Drought | Relatively Low |
| Cold Wave | No Rating |
| Landslide | Relatively Moderate |
| Volcano | Very Low |
| Avalanche | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
2,849 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M6.1.
| Sep 12, 1994 | 4 km S of Carter Springs, Nevada | M6.1 | 71 km | 14 km |
| Jul 8, 2021 | Antelope Valley, CA | M6.0 | 108 km | 7 km |
| May 24, 2013 | 2 km NNE of Canyondam, California | M5.7 | 126 km | 8 km |
| May 11, 2023 | Lake Almanor Earthquake | M5.5 | 130 km | 6 km |
| Aug 10, 2001 | 3 km N of Blairsden, California | M5.2 | 69 km | 5 km |
| May 12, 2023 | 4km NW of Canyondam, CA | M5.2 | 129 km | 6 km |
| Apr 26, 2008 | 1 km NW of Mogul, Nevada | M5.1 | 16 km | 3 km |
| Sep 12, 1994 | 8 km ESE of Mesa Vista, California | M5.1 | 74 km | -1 km |
| Jul 8, 2021 | 32km SE of Markleeville, CA | M5.0 | 108 km | 7 km |
| May 24, 2013 | 1km NNW of Canyondam, CA | M4.9 | 126 km | 4 km |
| Dec 22, 1995 | California-Nevada border region | M4.9 | 82 km | 4 km |
| Apr 26, 2008 | 0 km N of Mogul, Nevada | M4.8 | 16 km | 3 km |
| Oct 30, 1998 | 4 km N of Tahoe Vista, California | M4.8 | 12 km | 1 km |
| Dec 28, 1995 | 9 km WNW of Topaz Lake, Nevada | M4.8 | 82 km | -1 km |
| Feb 10, 1993 | 28 km SW of Empire, Nevada | M4.8 | 120 km | 5 km |
| Oct 1, 2011 | 7 km SSE of Schurz, Nevada | M4.8 | 121 km | 4 km |
| Jun 26, 2005 | 8 km NNW of Tahoe Vista, California | M4.8 | 12 km | -2 km |
| Apr 26, 2008 | 27km SE of Smith Valley, NV | M4.7 | 116 km | 4 km |
| Dec 23, 1995 | 8 km WNW of Topaz Lake, Nevada | M4.7 | 81 km | -1 km |
| Mar 9, 2007 | 13 km SE of Walker, California | M4.7 | 121 km | 7 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
24 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF1. Total: 2 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Aug 15, 2020 | EF1 | 38 km | 0.1 mi | 0 |
| Aug 14, 2020 | EF1 | 39 km | 0.4 mi | 0 |
| Nov 3, 1973 | EF1 | 89 km | 25.9 mi | 0 |
| Jul 16, 1973 | EF1 | 31 km | 1.0 mi | 0 |
| May 26, 1964 | EF1 | 83 km | 2.0 mi | 0 |
| Sep 21, 2017 | EF0 | 39 km | 0.4 mi | 0 |
| Sep 13, 2017 | EF0 | 24 km | 2.0 mi | 0 |
| Jul 20, 2015 | EF0 | 61 km | 3.2 mi | 0 |
| Jul 8, 2015 | EF0 | 47 km | 2.7 mi | 0 |
| Apr 27, 2005 | EF0 | 32 km | 0.2 mi | 0 |
| Jul 24, 2004 | EF0 | 31 km | 0.1 mi | 0 |
| Aug 2, 2003 | EF0 | 14 km | 0.1 mi | 0 |
| Aug 2, 2003 | EF0 | 19 km | 0.1 mi | 0 |
| Aug 1, 2002 | EF0 | 36 km | 0.1 mi | 0 |
| Feb 10, 2000 | EF0 | 27 km | 0.5 mi | 0 |
| Jul 13, 1999 | EF0 | 27 km | 0.1 mi | 0 |
| Jul 30, 1998 | EF0 | 28 km | 2.0 mi | 0 |
| Jun 11, 1998 | EF0 | 67 km | 0.1 mi | 0 |
| Jun 11, 1998 | EF0 | 70 km | 0.1 mi | 0 |
| Jun 9, 1997 | EF0 | 58 km | 0.1 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Nearby Volcanoes
4 volcanoes within 200 km. Closest: Soda Lakes (100 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Soda Lakes | Maar(s) | 1,251 m (4,104 ft) | Unknown | 100 km |
| Lassen Volcanic Center | Stratovolcano | 3,187 m (10,456 ft) | 1917 | 176 km |
| Mono Lake Volcanic Field | Pyroclastic cone(s) | 2,121 m (6,959 ft) | 1790 | 177 km |
| Mono-Inyo Craters | Lava dome(s) | 2,796 m (9,173 ft) | 1380 | 196 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Wildfire History
20 wildfires (100+ acres) recorded within 100 km. Largest: CALDOR (226,583 acres, 2021).
| Year | Name | Acres Burned | Distance |
| 2021 | CALDOR | 226,583 | 78 km |
| 2021 | SUGAR | 108,368 | 64 km |
| 2014 | KING | 99,070 | 69 km |
| 2017 | TRUCKEE | 98,411 | 82 km |
| 2017 | LONG VALLEY | 80,456 | 67 km |
| 2022 | MOSQUITO | 77,858 | 70 km |
| 2021 | TAMARACK | 70,171 | 81 km |
| 2019 | WALKER | 58,747 | 92 km |
| 2018 | PERRY | 53,734 | 64 km |
| 1994 | COTTONWOOD | 47,912 | 28 km |
| 1999 | FISH COMPLEX (FISH SPRINGS) | 47,030 | 73 km |
| 2020 | LOYALTON | 45,484 | 36 km |
| 1987 | CLARK | 39,194 | 83 km |
| 2016 | TULE | 35,341 | 74 km |
| 2017 | EARTHSTONE | 35,305 | 48 km |
| 2020 | NORTH | 34,120 | 51 km |
| 1985 | GOOSEBERRY | 29,290 | 55 km |
| 2013 | AMERICAN | 27,938 | 57 km |
| 2013 | BISON | 23,611 | 69 km |
| 2007 | ANTELOPE COMPLEX (WHEELER) | 23,108 | 96 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 29°F (-2°C) | 4.2 in | Wettest |
| February | 30°F (-1°C) | 3.8 in | |
| March | 35°F (2°C) | 3.4 in | |
| April | 40°F (4°C) | 1.4 in | |
| May | 48°F (9°C) | 1.2 in | |
| June | 55°F (13°C) | 0.8 in | |
| July | 63°F (17°C) | 0.4 in | Warmest, Driest |
| August | 62°F (17°C) | 0.5 in | |
| September | 55°F (13°C) | 0.8 in | |
| October | 47°F (8°C) | 1.5 in | |
| November | 36°F (2°C) | 3.3 in | |
| December | 28°F (-2°C) | 3.5 in | Coldest |
Floriston has a seasonal temperature swing of 34°F / from 28°F in December to 63°F in July. Total annual precipitation is 24.8 inches, with January being the wettest month (4.2") and July the driest (0.4").