Weather & Climate in Hyampom, CA

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

Hyampom enjoys a temperate climate with an average annual temperature of 57°F (14°C). Winters average 42°F in January while summers reach 75°F in July. The area gets 275 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 35.8 inches. The area receives 2.7 inches of snow annually. Air quality is rated Good with a median AQI of 48. The city sits at an elevation of 1,268 feet.

Temperature

42°F Jan (6°C) 75°F Jul (24°C)

Annual Average	56.8°F
	5% above US avg
January Average	42°F (6°C)
July Average	75°F (24°C)
Sunny Days	275 days/yr

Geography

Elevation	1,268 ft (386 m)
Area	20.3 sq mi (52.5 km²)
Population Density	1/sq mi
Coordinates	40.6262°N, 123.4688°W
Timezone	America/Los_Angeles
County	Trinity County County
Nearest Airport	Redding Regional (RDD) 62 miles away

Precipitation & Snow

Annual Rainfall 35.8"

6% below US avg

Snowfall 2.7"

Wettest Month (Dec) 9.21"

Driest Month (Jul) 0.20"

Air Quality

AQI Median	48.0
Rating	Good

Natural Hazard Risk

Overall Risk	Relatively Low
Risk Score	79.5 / 100
Social Vulnerability	82.6 / 100
Community Resilience	37.0 / 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	Very Low
Lightning	Very Low
Drought	No Rating
Cold Wave	No Rating
Landslide	Relatively High
Volcano	Very Low
Avalanche	Very Low

Source: FEMA National Risk Index v1.20 (Dec 2025)

Earthquake History

5,008 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M7.2.

Apr 25, 1992	The 1992 Petrolia, California Earthquake	M7.2	72 km	10 km
Mar 10, 2014	77 km WNW of Indianola, California	M6.8	142 km	16 km
Apr 26, 1992	32 km SW of Ferndale, California	M6.6	96 km	22 km
Jan 10, 2010	The 2010 Eureka, California Earthquake	M6.5	103 km	29 km
Apr 26, 1992	30 km WSW of Ferndale, California	M6.5	95 km	19 km
Aug 17, 1991	30 km SSW of Scotia, California	M6.0	81 km	8 km
Feb 4, 2010	61 km WSW of Ferndale, California	M5.9	128 km	23 km
Mar 9, 2020	69km W of Petrolia, CA	M5.8	140 km	3 km
Jan 28, 2015	40 km SW of Ferndale, California	M5.7	102 km	17 km
Jan 22, 1997	33 km SW of Scotia, California	M5.6	86 km	23 km
Feb 13, 2012	26 km NNW of Willow Creek, California	M5.6	64 km	27 km
Jun 23, 2019	6km SSW of Petrolia, CA	M5.6	81 km	9 km
Feb 26, 2007	52km W of Ferndale, CA	M5.4	118 km	5 km
Feb 26, 2007	51 km W of Ferndale, California	M5.4	118 km	-1 km
Jan 16, 1990	30 km NW of Shelter Cove, California	M5.4	82 km	4 km
Apr 30, 2008	3 km NNW of Burnt Ranch, California	M5.4	23 km	28 km
Dec 26, 1994	7 km WNW of Fields Landing, California	M5.4	71 km	23 km
Jan 1, 2023	15km SE of Rio Dell, CA	M5.4	49 km	31 km
Mar 8, 1992	27 km NW of Shelter Cove, California	M5.3	80 km	9 km
Mar 18, 2020	15km W of Petrolia, CA	M5.2	89 km	29 km

Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.

Tornado History

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

Date	Rating	Distance	Path	Fatalities
Mar 29, 1958	EF2	64 km	2.0 mi	0
Jan 25, 2018	EF0	62 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	—	77 km
2024	CAPE MENDOCINO, N. CALIFORNIA	Earthquake	0.1 m	—	134 km

Source: NOAA/NCEI Historical Tsunami Database.

Nearby Volcanoes

4 volcanoes within 200 km. Closest: Shasta (138 km).

Name	Type	Elevation	Last Eruption	Distance
Shasta	Stratovolcano	4,317 m (14,163 ft)	1250	138 km
Lassen Volcanic Center	Stratovolcano	3,187 m (10,456 ft)	1917	166 km
Clear Lake	Volcanic field	1,439 m (4,721 ft)	Unknown	194 km
Medicine Lake	Shield	2,412 m (7,913 ft)	1060	194 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	85 km
2018	CARR	233,710	75 km
2021	MONUMENT	226,125	20 km
2021	HAYPRESS	204,549	68 km
2020	RED SALMON COMPLEX	147,535	55 km
1999	MEGRAM- ORLEANS	125,337	45 km
2021	MCFARLAND	121,554	61 km
2006	PIGEON	100,962	43 km
2008	YOLLA BOLLY COMPLEX (IRON)	94,888	72 km
2015	RIVER COMPLEX	78,531	33 km
2018	DELTA	63,732	95 km
2017	ISLAND	62,931	93 km
2020	ZOGG	56,941	75 km
1987	YELLOW 2	53,626	88 km
2012	NORTH PASS	43,689	89 km
2008	BEAR WALLOW COMPLEX (UKONOM)	40,029	82 km
2008	SHU LIGHTNING COMPLEX (MOON)	36,514	69 km
2023	MOSQUITO	36,111	95 km
2015	ROUTE COMPLEX	35,444	7 km
2014	WHITES	34,506	85 km

Source: NIFC/IRWIN Wildfire Records (100+ acres).

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	42°F (6°C)	8.8 in
February	42°F (5°C)	7.3 in
March	43°F (6°C)	7.0 in
April	47°F (8°C)	3.2 in
May	53°F (11°C)	1.5 in
June	59°F (15°C)	0.6 in
July	75°F (24°C)	0.2 in	Warmest, Driest
August	67°F (19°C)	0.7 in
September	62°F (17°C)	1.2 in
October	54°F (12°C)	3.5 in
November	44°F (7°C)	8.4 in
December	39°F (4°C)	9.2 in	Coldest, Wettest

Hyampom has a seasonal temperature swing of 36°F / from 39°F in December to 75°F in July. Total annual precipitation is 51.5 inches, with December being the wettest month (9.2") and July the driest (0.2").

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