Weather & Climate in Castroville, CA

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

Castroville enjoys a temperate climate with an average annual temperature of 58°F (14°C). Winters average 52°F in January while summers reach 62°F in July / relatively mild seasonal variation. The area gets 330 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 15.4 inches (drier than the 38-inch national average). Air quality is rated Good with a median AQI of 48. The city sits at an elevation of 28 feet.

Temperature

52°F Jan (11°C) 62°F Jul (17°C)

Annual Average	57.8°F
	7% above US avg
January Average	52°F (11°C)
July Average	62°F (17°C)
Sunny Days	330 days/yr

Geography

Elevation	28 ft (9 m)
Area	1.0 sq mi (2.6 km²)
Population Density	6,735/sq mi
Coordinates	36.7648°N, 121.7534°W
Timezone	America/Los_Angeles
County	San Benito County County
Nearest Airport	Monterey Regional (MRY) 13 miles away

Precipitation & Snow

Annual Rainfall 15.4"

60% below US avg

Snowfall 0.0"

Wettest Month (Jan) 4.09"

Driest Month (Aug) 0.08"

Air Quality

AQI Median	48.0
Rating	Good

Natural Hazard Risk

Overall Risk	Relatively Moderate
Risk Score	85.2 / 100
Social Vulnerability	10.6 / 100
Community Resilience	56.0 / 100

Hazard Breakdown

Tornado	Very Low
Earthquake	Relatively Moderate
Wildfire	Relatively Moderate
Flood	Relatively Low
Hail	Very Low
Strong Wind	Very Low
Heat Wave	Relatively Low
Winter Weather	Very Low
Lightning	Very Low
Drought	Relatively High
Cold Wave	No Rating
Landslide	Relatively Moderate
Avalanche	Very Low

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

Earthquake History

5,024 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M5.4.

Apr 18, 1990	5 km NNW of Aromas, California	M5.4	21 km	5 km
Oct 21, 2012	24 km NE of San Lucas, California	M5.3	95 km	9 km
Sep 17, 1991	22 km NW of San Simeon, California	M5.2	113 km	9 km
Aug 12, 1998	10 km SW of Ridgemark, California	M5.1	26 km	9 km
Apr 18, 1990	4 km E of Interlaken, California	M5.1	22 km	7 km
Sep 29, 2004	8 km NW of Parkfield, California	M5.0	144 km	11 km
Jan 16, 1993	9 km E of Gilroy, California	M4.9	38 km	7 km
Apr 19, 1996	2 km E of Aromas, California	M4.9	18 km	5 km
Apr 18, 1990	4 km NNW of Aromas, California	M4.9	20 km	6 km
Apr 23, 1995	22 km NNE of Soledad, California	M4.9	53 km	7 km
Dec 20, 1994	3 km NW of Parkfield, California	M4.9	149 km	8 km
May 14, 2002	5 km SSW of Gilroy, California	M4.9	26 km	7 km
Sep 30, 2004	13 km NW of Parkfield, California	M4.9	139 km	10 km
Nov 14, 1993	8 km NW of Parkfield, California	M4.8	144 km	11 km
Feb 4, 1991	33 km SE of Big Sur, California	M4.7	83 km	9 km
May 21, 1996	8 km ESE of East Foothills, California	M4.7	66 km	8 km
Apr 18, 1990	4 km N of Aromas, California	M4.7	21 km	4 km
Aug 11, 1993	14 km ESE of Alum Rock, California	M4.7	61 km	9 km
Aug 27, 2011	21 km NE of Soledad, California	M4.6	55 km	8 km
Mar 24, 1991	1 km NNE of Interlaken, California	M4.6	22 km	15 km

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

Tornado History

29 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF2. Total: 10 injuries.

Date	Rating	Distance	Path	Fatalities
May 5, 1998	EF2	72 km	0.6 mi	0
Mar 11, 1985	EF2	33 km	0.5 mi	0
Jan 11, 1951	EF2	75 km	5.7 mi	0
Dec 14, 2024	EF1	40 km	0.3 mi	0
Dec 20, 2001	EF1	23 km	0.5 mi	0
May 5, 1998	EF1	76 km	0.3 mi	0
Dec 6, 1992	EF1	28 km	7.0 mi	0
Dec 6, 1992	EF1	22 km	1.0 mi	0
Jan 14, 1980	EF1	80 km	0.3 mi	0
Apr 22, 1967	EF1	97 km	1.0 mi	0
Apr 22, 1967	EF1	97 km	0.1 mi	0
Apr 1, 1965	EF1	24 km	0.1 mi	0
Jan 6, 2019	EF0	34 km	0.1 mi	0
Jan 6, 2019	EF0	32 km	0.5 mi	0
Apr 22, 2016	EF0	65 km	0.2 mi	0
Jan 6, 2016	EF0	38 km	0.6 mi	0
Dec 22, 2012	EF0	15 km	1.1 mi	0
Apr 14, 2007	EF0	30 km	0.2 mi	0
Dec 5, 1998	EF0	34 km	1.0 mi	0
Feb 14, 1998	EF0	94 km	0.1 mi	0

Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).

Tsunami History

6 tsunamis recorded within 500 km. Highest wave on record: 4.5 m (15 ft).

Year	Location	Cause	Max Wave	Deaths	Distance
1868	N. CALIFORNIA	Eruption + Earthquake	4.5 m	30	108 km
1989	N. CALIFORNIA	Earthquake	1.0 m	62	32 km
1856	N. CALIFORNIA	Eruption + Earthquake	0.6 m	—	95 km
1906	N. CALIFORNIA	Eruption + Earthquake	0.1 m	—	123 km
1901	MONTEREY BAY, N. CALIFORNIA	Eruption + Earthquake	—	—	141 km
1865	N. CALIFORNIA	Eruption + Earthquake	—	—	50 km

Source: NOAA/NCEI Historical Tsunami Database.

Wildfire History

20 wildfires (100+ acres) recorded within 100 km. Largest: SCU LIGHTNING COMPLEX (405,787 acres, 2020).

Year	Name	Acres Burned	Distance
2020	SCU LIGHTNING COMPLEX	405,787	84 km
2008	BASIN COMPLEX	164,537	63 km
2016	SOBERANES	131,921	49 km
2020	DOLAN	124,382	81 km
2020	CZU AUG LIGHTNING	85,894	59 km
2008	BASIN COMPLEX (INDIANS)	59,095	78 km
1985	GORDA-RAT	52,474	82 km
2020	RIVER	51,582	35 km
2007	LICK	47,424	59 km
1999	KIRK COMPLEX (HARE)	43,054	83 km
1985	CHERRY	41,654	94 km
2006	CANYON	36,851	75 km
1999	KIRK COMPLEX (FIVE)	36,162	55 km
1996	WILD	24,439	95 km
2003	ANNIE	17,383	69 km
1996	MERCY	16,993	84 km
2008	CHALK	15,420	87 km
1984	BONANZA	12,105	73 km
2009	CORRAL	12,006	95 km
1985	LEXINGTON	11,550	45 km

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

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	52°F (11°C)	4.1 in	Wettest
February	53°F (11°C)	3.5 in
March	54°F (12°C)	3.2 in
April	56°F (13°C)	1.5 in
May	58°F (15°C)	0.3 in
June	61°F (16°C)	0.2 in
July	62°F (17°C)	0.1 in
August	63°F (17°C)	0.1 in	Driest
September	63°F (17°C)	0.3 in	Warmest
October	60°F (16°C)	1.0 in
November	55°F (13°C)	3.0 in
December	50°F (10°C)	3.2 in	Coldest

Castroville has a seasonal temperature swing of 13°F / from 50°F in December to 63°F in September. Total annual precipitation is 20.5 inches, with January being the wettest month (4.1") and August the driest (0.1").

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