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Weather & Climate in Castella, CA
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Castella experiences four distinct seasons with an average annual temperature of 54°F (12°C). Winters average 39°F in January while summers reach 72°F in July. The area gets 269 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 63.3 inches (wetter than the 38-inch national average). The area receives 26.7 inches of snow annually, a moderate snowfall amount. Air quality is rated Good with a median AQI of 48. The city sits at an elevation of 2,151 feet.
Temperature
39°F Jan (4°C)
72°F Jul (22°C)
| Annual Average | 53.9°F |
| 0% below US avg | |
| January Average | 39°F (4°C) |
| July Average | 72°F (22°C) |
| Sunny Days | 269 days/yr |
Geography
| Elevation | 2,151 ft (656 m) |
| Area | 1.1 sq mi (2.9 km²) |
| Population Density | 256/sq mi |
| Coordinates | 41.1772°N, 122.2872°W |
| Timezone | America/Los_Angeles |
| County | Siskiyou County County |
| Nearest Airport | Redding Regional (RDD) 47 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 48.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Moderate |
| Risk Score | 89.0 / 100 |
| Social Vulnerability | 79.4 / 100 |
| Community Resilience | 44.8 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Earthquake | Relatively Low |
| Wildfire | Relatively High |
| Flood | Relatively Moderate |
| Hail | Very Low |
| Strong Wind | Very Low |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Moderate |
| Lightning | Relatively Low |
| Drought | Relatively High |
| Cold Wave | Very Low |
| Landslide | Relatively Moderate |
| Volcano | Relatively High |
| Avalanche | Relatively Moderate |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
1,301 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M6.0.
| Sep 21, 1993 | 27 km WNW of Klamath Falls, Oregon | M6.0 | 133 km | 9 km |
| Sep 21, 1993 | 22 km WNW of Klamath Falls, Oregon | M5.9 | 129 km | 9 km |
| Feb 13, 2012 | 26 km NNW of Willow Creek, California | M5.6 | 126 km | 27 km |
| May 11, 2023 | Lake Almanor Earthquake | M5.5 | 147 km | 6 km |
| Apr 30, 2008 | 3 km NNW of Burnt Ranch, California | M5.4 | 108 km | 28 km |
| May 12, 2023 | 4km NW of Canyondam, CA | M5.2 | 148 km | 6 km |
| Dec 4, 1993 | 20 km WNW of Klamath Falls, Oregon | M5.1 | 126 km | 5 km |
| Nov 26, 1998 | 7km NW of Redding, CA | M5.1 | 62 km | 25 km |
| Sep 8, 2023 | 12 km NE of Burney, CA | M5.0 | 66 km | 16 km |
| Jan 18, 1990 | 27 km ESE of Orick, California | M4.9 | 124 km | 35 km |
| Jul 21, 2016 | 19km SSE of Blue Lake, CA | M4.8 | 144 km | 26 km |
| Jan 19, 2008 | 31 km NW of Rancho Tehama Reserve, California | M4.7 | 117 km | 2 km |
| Nov 26, 1998 | 5km NNW of Redding, CA | M4.6 | 63 km | 25 km |
| Jul 21, 1998 | 4 km NNW of Redding, California | M4.5 | 62 km | 23 km |
| Jan 19, 2008 | 34 km WNW of Rancho Tehama Reserve, California | M4.5 | 119 km | 10 km |
| Aug 28, 2016 | 8 km ESE of Mad River, California | M4.5 | 125 km | 36 km |
| May 10, 2005 | 10 km NW of Burney, California | M4.4 | 51 km | 17 km |
| Mar 9, 1992 | 8 km SE of Hyampom, California | M4.4 | 113 km | 33 km |
| Mar 27, 1997 | 14km SW of Manton, CA | M4.4 | 98 km | 8 km |
| Jun 14, 1991 | 8 km SW of Hat Creek, California | M4.4 | 72 km | 11 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
1 tornado (EF0+) recorded within 100 km since 1950. Strongest on record: EF0.
| Date | Rating | Distance | Path | Fatalities |
| Mar 5, 1978 | EF0 | 95 km | 0.1 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Nearby Volcanoes
4 volcanoes within 200 km. Closest: Shasta (27 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Shasta | Stratovolcano | 4,317 m (14,163 ft) | 1250 | 27 km |
| Medicine Lake | Shield | 2,412 m (7,913 ft) | 1060 | 78 km |
| Lassen Volcanic Center | Stratovolcano | 3,187 m (10,456 ft) | 1917 | 101 km |
| Crater Lake | Caldera | 2,487 m (8,159 ft) | -2850 | 195 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Wildfire History
20 wildfires (100+ acres) recorded within 100 km. Largest: CARR (233,710 acres, 2018).
| Year | Name | Acres Burned | Distance |
| 2018 | CARR | 233,710 | 58 km |
| 2021 | MONUMENT | 226,125 | 96 km |
| 2021 | HAYPRESS | 204,549 | 59 km |
| 2020 | RED SALMON COMPLEX | 147,535 | 94 km |
| 2021 | ANTELOPE | 141,960 | 67 km |
| 1999 | MEGRAM- ORLEANS | 125,337 | 97 km |
| 2014 | HAPPY CAMP COMPLEX | 118,491 | 96 km |
| 2006 | PIGEON | 100,962 | 81 km |
| 2021 | MCCASH | 95,762 | 98 km |
| 2020 | CALDWELL | 81,870 | 93 km |
| 2015 | RIVER COMPLEX | 78,531 | 95 km |
| 2008 | PANTHER | 71,448 | 100 km |
| 2018 | DELTA | 63,732 | 24 km |
| 2017 | ISLAND | 62,931 | 76 km |
| 1992 | FOUNTAIN | 62,340 | 52 km |
| 2022 | MCKINNEY | 60,592 | 84 km |
| 2020 | ZOGG | 56,941 | 89 km |
| 1987 | YELLOW 2 | 53,626 | 90 km |
| 2012 | BAGLEY | 47,731 | 25 km |
| 2018 | HIRZ | 46,700 | 22 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 39°F (4°C) | 6.9 in | Wettest |
| February | 37°F (3°C) | 5.8 in | |
| March | 40°F (4°C) | 5.6 in | |
| April | 44°F (7°C) | 2.8 in | |
| May | 52°F (11°C) | 1.9 in | |
| June | 59°F (15°C) | 1.0 in | |
| July | 72°F (22°C) | 0.4 in | Warmest, Driest |
| August | 65°F (18°C) | 0.6 in | |
| September | 59°F (15°C) | 1.0 in | |
| October | 51°F (11°C) | 2.5 in | |
| November | 40°F (4°C) | 5.7 in | |
| December | 34°F (1°C) | 5.9 in | Coldest |
Castella has a seasonal temperature swing of 38°F / from 34°F in December to 72°F in July. Total annual precipitation is 39.9 inches, with January being the wettest month (6.9") and July the driest (0.4").