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Weather & Climate in Alderpoint, CA

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

Alderpoint enjoys a temperate climate with an average annual temperature of 56°F (13°C). Winters average 44°F in January while summers reach 70°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 65.4 inches (wetter than the 38-inch national average). Air quality is rated Good with a median AQI of 48. The city sits at an elevation of 1,090 feet.

Temperature

44°F Jan (7°C) 70°F Jul (21°C)
Annual Average56.1°F
4% above US avg
January Average44°F (7°C)
July Average70°F (21°C)
Sunny Days269 days/yr

Geography

Elevation1,090 ft (332 m)
Area2.4 sq mi (6.3 km²)
Population Density26/sq mi
Coordinates40.1613°N, 123.6157°W
TimezoneAmerica/Los_Angeles
CountyHumboldt County County
Nearest AirportRedding Regional (RDD)
73 miles away

Precipitation & Snow

Annual Rainfall 65.4"
72% above US avg
Snowfall 0.2"
Wettest Month (Jan) 10.94"
Driest Month (Jul) 0.12"

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

5,358 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M7.2.

Apr 25, 1992 The 1992 Petrolia, California Earthquake M7.2 56 km 10 km
Mar 10, 2014 77 km WNW of Indianola, California M6.8 148 km 16 km
Apr 26, 1992 32 km SW of Ferndale, California M6.6 83 km 22 km
Jan 10, 2010 The 2010 Eureka, California Earthquake M6.5 106 km 29 km
Apr 26, 1992 30 km WSW of Ferndale, California M6.5 86 km 19 km
Aug 17, 1991 30 km SSW of Scotia, California M6.0 58 km 8 km
Feb 4, 2010 61 km WSW of Ferndale, California M5.9 118 km 23 km
Mar 9, 2020 69km W of Petrolia, CA M5.8 128 km 3 km
Jan 28, 2015 40 km SW of Ferndale, California M5.7 86 km 17 km
Mar 16, 2000 85 km WSW of Ferndale, California M5.7 140 km 5 km
Jan 22, 1997 33 km SW of Scotia, California M5.6 66 km 23 km
Feb 13, 2012 26 km NNW of Willow Creek, California M5.6 110 km 27 km
Jun 23, 2019 6km SSW of Petrolia, CA M5.6 60 km 9 km
Jan 16, 1990 30 km NW of Shelter Cove, California M5.4 59 km 4 km
Feb 26, 2007 52km W of Ferndale, CA M5.4 119 km 5 km
Apr 30, 2008 3 km NNW of Burnt Ranch, California M5.4 76 km 28 km
Dec 26, 1994 7 km WNW of Fields Landing, California M5.4 87 km 23 km
Feb 26, 2007 51 km W of Ferndale, California M5.4 118 km -1 km
Jan 1, 2023 15km SE of Rio Dell, CA M5.4 41 km 31 km
Mar 8, 1992 27 km NW of Shelter Cove, California M5.3 56 km 9 km
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.

Tornado History

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

Date Rating Distance Path Fatalities
Mar 29, 1958 EF2 97 km 2.0 mi 0
Dec 5, 1998 EF1 84 km 1.7 mi 0
Jan 25, 2018 EF0 86 km 0.0 mi 0
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).

Tsunami History

2 tsunamis recorded within 500 km. Highest wave on record: 1.8 m (6 ft).

Year Location Cause Max Wave Deaths Distance
1992 CAPE MENDOCINO, N. CALIFORNIA Earthquake 1.8 m — 64 km
2024 CAPE MENDOCINO, N. CALIFORNIA Earthquake 0.1 m — 122 km
Source: NOAA/NCEI Historical Tsunami Database.

Nearby Volcanoes

3 volcanoes within 200 km. Closest: Clear Lake (151 km).

Name Type Elevation Last Eruption Distance
Clear Lake Volcanic field 1,439 m (4,721 ft) Unknown 151 km
Lassen Volcanic Center Stratovolcano 3,187 m (10,456 ft) 1917 182 km
Shasta Stratovolcano 4,317 m (14,163 ft) 1250 183 km
Source: Smithsonian Institution Global Volcanism Program (GVP).

Wildfire History

20 wildfires (100+ acres) recorded within 100 km. Largest: AUGUST COMPLEX (1,068,802 acres, 2020).

Year Name Acres Burned Distance
2020 AUGUST COMPLEX 1,068,802 56 km
2021 MONUMENT 226,125 69 km
1999 MEGRAM- ORLEANS 125,337 98 km
2021 MCFARLAND 121,554 61 km
2006 PIGEON 100,962 95 km
2008 YOLLA BOLLY COMPLEX (IRON) 94,888 55 km
2015 RIVER COMPLEX 78,531 86 km
2020 ZOGG 56,941 89 km
1987 MENDENHALL 54,162 85 km
2012 NORTH PASS 43,689 57 km
2017 REDWOOD VALLEY INCIDENT 36,545 98 km
2008 SHU LIGHTNING COMPLEX (MOON) 36,514 91 km
2015 ROUTE COMPLEX 35,444 49 km
2008 IRON AND ALPS COMPLEXES (EAGLE) 32,397 73 km
2015 PATTISON 31,129 62 km
2022 CAMPBELL 30,392 88 km
2008 IRON AND ALPS COMPLEXES (BUCKHORN) 29,446 81 km
2008 LIME COMPLEX (LIME) 27,234 41 km
2008 LIME COMPLEX (MINERS) 25,680 61 km
2008 IRON AND ALPS COMPLEXES (CEDAR) 25,277 69 km
Source: NIFC/IRWIN Wildfire Records (100+ acres).

Monthly Weather

Month Avg Temperature Precipitation Summary
January 44°F (7°C) 10.9 in Wettest
February 45°F (7°C) 8.7 in
March 47°F (8°C) 8.4 in
April 50°F (10°C) 3.7 in
May 56°F (13°C) 1.5 in
June 62°F (17°C) 0.4 in
July 70°F (21°C) 0.1 in Warmest, Driest
August 69°F (20°C) 0.6 in
September 65°F (18°C) 1.1 in
October 57°F (14°C) 3.8 in
November 48°F (9°C) 9.6 in
December 43°F (6°C) 10.9 in Coldest

Alderpoint has a seasonal temperature swing of 27°F / from 43°F in December to 70°F in July. Total annual precipitation is 59.8 inches, with January being the wettest month (10.9") and July the driest (0.1").

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