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Weather & Climate in Westhaven-Moonstone, CA

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

Westhaven-Moonstone experiences four distinct seasons with an average annual temperature of 51°F (11°C). Winters average 44°F in January while summers reach 58°F in July / relatively mild seasonal variation. The area gets 282 sunny days per year, well above the U.S. average of 205 / making it one of the sunnier locations in the country. Air quality is rated Good with a median AQI of 48. The city sits at an elevation of 599 feet.

Temperature

44°F Jan (7°C) 58°F Jul (15°C)
Annual Average50.9°F
6% below US avg
January Average44°F (7°C)
July Average58°F (15°C)
Sunny Days282 days/yr

Geography

Elevation599 ft (183 m)
Area8.1 sq mi (21.0 km²)
Population Density170/sq mi
Coordinates41.0361°N, 124.0908°W
TimezoneAmerica/Los_Angeles
CountyHumboldt County County
Nearest AirportRedding Regional (RDD)
101 miles away

Precipitation & Snow

Wettest Month (Dec) 9.92"
Driest Month (Jul) 0.24"

Air Quality

AQI Median48.0
RatingGood

Natural Hazard Risk

Overall RiskRelatively High
Risk Score96.8 / 100
Social Vulnerability74.7 / 100
Community Resilience56.4 / 100

Hazard Breakdown

Tornado Very Low
Earthquake Relatively High
Wildfire Relatively Moderate
Flood Relatively High
Hail Very Low
Strong Wind Very Low
Heat Wave Relatively Low
Winter Weather Very Low
Lightning Relatively Low
Drought Relatively Moderate
Cold Wave No Rating
Landslide Relatively High
Coastal Flood Relatively High
Tsunami Relatively High
Volcano No Rating
Avalanche Very Low
Source: FEMA National Risk Index v1.20 (Dec 2025)

Earthquake History

5,119 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M7.2.

Apr 25, 1992 The 1992 Petrolia, California Earthquake M7.2 79 km 10 km
Mar 10, 2014 77 km WNW of Indianola, California M6.8 91 km 16 km
Feb 19, 1995 126 km W of Ferndale, California M6.6 149 km 5 km
Apr 26, 1992 32 km SW of Ferndale, California M6.6 83 km 22 km
Jan 10, 2010 The 2010 Eureka, California Earthquake M6.5 66 km 29 km
Apr 26, 1992 30 km WSW of Ferndale, California M6.5 78 km 19 km
Aug 17, 1991 30 km SSW of Scotia, California M6.0 89 km 8 km
Feb 4, 2010 61 km WSW of Ferndale, California M5.9 101 km 23 km
Mar 9, 2020 69km W of Petrolia, CA M5.8 111 km 3 km
Jan 28, 2015 40 km SW of Ferndale, California M5.7 91 km 17 km
Mar 16, 2000 85 km WSW of Ferndale, California M5.7 121 km 5 km
Jan 22, 1997 33 km SW of Scotia, California M5.6 88 km 23 km
Feb 13, 2012 26 km NNW of Willow Creek, California M5.6 28 km 27 km
Jun 23, 2019 6km SSW of Petrolia, CA M5.6 87 km 9 km
May 21, 2023 108km W of Petrolia, CA M5.6 144 km 10 km
Oct 4, 1997 100 km WNW of Samoa, California M5.5 105 km 7 km
Jan 16, 1990 30 km NW of Shelter Cove, California M5.4 90 km 4 km
Dec 26, 1994 7 km WNW of Fields Landing, California M5.4 38 km 23 km
Jan 13, 2001 off the coast of Northern California M5.4 102 km 2 km
Feb 26, 2007 51 km W of Ferndale, California M5.4 78 km -1 km
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.

Tornado History

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

Date Rating Distance Path Fatalities
Mar 29, 1958 EF2 10 km 2.0 mi 0
Dec 30, 1992 EF1 80 km 0.2 mi 0
Dec 11, 1992 EF1 80 km 0.2 mi 0
Jan 25, 2018 EF0 26 km 0.0 mi 0
Jan 20, 1996 EF0 80 km 0.1 mi 0
May 13, 1960 EF0 58 km 0.1 mi 0
Jan 10, 1958 EF0 80 km 0.8 mi 0
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).

Tsunami History

3 tsunamis recorded within 500 km. Highest wave on record: 3.1 m (10 ft).

Year Location Cause Max Wave Deaths Distance
1873 N. CALIFORNIA Eruption + Earthquake 3.1 m — 107 km
1992 CAPE MENDOCINO, N. CALIFORNIA Earthquake 1.8 m — 77 km
2024 CAPE MENDOCINO, N. CALIFORNIA Earthquake 0.1 m — 108 km
Source: NOAA/NCEI Historical Tsunami Database.

Nearby Volcanoes

1 volcano within 200 km. Closest: Shasta (164 km).

Name Type Elevation Last Eruption Distance
Shasta Stratovolcano 4,317 m (14,163 ft) 1250 164 km
Source: Smithsonian Institution Global Volcanism Program (GVP).

Wildfire History

20 wildfires (100+ acres) recorded within 100 km. Largest: MONUMENT (226,125 acres, 2021).

Year Name Acres Burned Distance
2021 MONUMENT 226,125 78 km
2021 HAYPRESS 204,549 93 km
2020 RED SALMON COMPLEX 147,535 58 km
1999 MEGRAM- ORLEANS 125,337 55 km
2006 PIGEON 100,962 75 km
2008 SISKIYOU-BLUE 2 COMPLEX (BLUE 2) 100,823 74 km
2021 MCCASH 95,762 85 km
2017 OAK 95,692 90 km
2023 KELLY 90,267 99 km
2015 RIVER COMPLEX 78,531 63 km
2008 PANTHER 71,448 82 km
1987 KING TITUS 71,390 89 km
2017 ISLAND 62,931 91 km
1987 YELLOW 2 53,626 77 km
2008 BEAR WALLOW COMPLEX (UKONOM) 40,029 74 km
2023 MOSQUITO 36,111 60 km
2015 ROUTE COMPLEX 35,444 67 km
2014 WHITES 34,506 94 km
2008 IRON AND ALPS COMPLEXES (EAGLE) 32,397 86 km
2015 PATTISON 31,129 68 km
Source: NIFC/IRWIN Wildfire Records (100+ acres).

Monthly Weather

Month Avg Temperature Precipitation Summary
January 44°F (7°C) 9.0 in Coldest
February 47°F (8°C) 7.7 in
March 48°F (9°C) 7.8 in
April 50°F (10°C) 4.2 in
May 53°F (12°C) 2.2 in
June 56°F (13°C) 0.9 in
July 58°F (15°C) 0.2 in Driest
August 60°F (15°C) 0.7 in Warmest
September 59°F (15°C) 1.4 in
October 55°F (13°C) 4.0 in
November 49°F (10°C) 9.3 in
December 46°F (8°C) 9.9 in Wettest

Westhaven-Moonstone has a seasonal temperature swing of 16°F / from 44°F in January to 60°F in August. Total annual precipitation is 57.4 inches, with December being the wettest month (9.9") and July the driest (0.2").

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