Weather & Climate in San Joaquin, CA

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

San Joaquin enjoys a temperate climate with an average annual temperature of 62°F (17°C). Winters average 46°F in January while summers reach 80°F in July. 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 11.3 inches (drier than the 38-inch national average). Air quality is rated Moderate with a median AQI of 51. 49% of days have good air quality. The city sits at an elevation of 169 feet.

Temperature

46°F Jan (8°C) 80°F Jul (27°C)

Annual Average	62.4°F
	16% above US avg
January Average	46°F (8°C)
July Average	80°F (27°C)
Sunny Days	330 days/yr

Geography

Elevation	169 ft (52 m)
Area	1.2 sq mi (3.0 km²)
Population Density	3,191/sq mi
Coordinates	36.6056°N, 120.1899°W
Timezone	America/Los_Angeles
County	Fresno County County
Nearest Airport	Fresno Yosemite International (FAT) 29 miles away

Precipitation & Snow

Annual Rainfall 11.3"

70% below US avg

Snowfall 0.0"

Wettest Month (Feb) 1.38"

Driest Month (Jun) 0.04"

Air Quality

AQI Median	51.0
Rating	Moderate
Good Days %	48.6%
Unhealthy Days	11

Natural Hazard Risk

Overall Risk	Relatively High
Risk Score	99.3 / 100
Social Vulnerability	60.3 / 100
Community Resilience	16.6 / 100

Hazard Breakdown

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

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

Earthquake History

4,859 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M6.0.

Sep 28, 2004	2004 Parkfield, California Earthquake	M6.0	89 km	8 km
Apr 18, 1990	5 km NNW of Aromas, California	M5.4	136 km	5 km
Oct 21, 2012	24 km NE of San Lucas, California	M5.3	68 km	9 km
Sep 17, 1991	22 km NW of San Simeon, California	M5.2	136 km	9 km
Apr 18, 1990	4 km E of Interlaken, California	M5.1	139 km	7 km
Aug 12, 1998	10 km SW of Ridgemark, California	M5.1	115 km	9 km
Sep 29, 2004	8 km NW of Parkfield, California	M5.0	78 km	11 km
Jan 16, 1993	9 km E of Gilroy, California	M4.9	122 km	7 km
May 14, 2002	5 km SSW of Gilroy, California	M4.9	132 km	7 km
Apr 19, 1996	2 km E of Aromas, California	M4.9	131 km	5 km
Apr 18, 1990	4 km NNW of Aromas, California	M4.9	136 km	6 km
Apr 23, 1995	22 km NNE of Soledad, California	M4.9	90 km	7 km
Dec 20, 1994	3 km NW of Parkfield, California	M4.9	80 km	8 km
Sep 30, 2004	13 km NW of Parkfield, California	M4.9	75 km	10 km
Feb 24, 2016	6km SSW of Wasco, CA	M4.9	139 km	22 km
Nov 14, 1993	8 km NW of Parkfield, California	M4.8	78 km	11 km
Sep 28, 2004	12 km SE of Parkfield, California	M4.7	90 km	6 km
Apr 18, 1990	4 km N of Aromas, California	M4.7	134 km	4 km
Feb 4, 1991	33 km SE of Big Sur, California	M4.7	139 km	9 km
Aug 27, 2011	21 km NE of Soledad, California	M4.6	89 km	8 km

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

Tornado History

76 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF2. Total: 5 injuries.

Date	Rating	Distance	Path	Fatalities
Apr 5, 1980	EF2	51 km	15.0 mi	0
Mar 22, 1962	EF2	41 km	0.5 mi	0
Jan 17, 2019	EF1	62 km	0.3 mi	0
Dec 16, 2002	EF1	86 km	1.3 mi	0
May 20, 2002	EF1	37 km	2.7 mi	0
Feb 14, 1998	EF1	39 km	3.0 mi	0
Nov 22, 1996	EF1	84 km	0.2 mi	0
Nov 22, 1996	EF1	39 km	0.8 mi	0
Jan 14, 1995	EF1	58 km	1.0 mi	0
Feb 28, 1991	EF1	72 km	0.2 mi	0
Mar 8, 1986	EF1	49 km	4.0 mi	0
Mar 28, 1982	EF1	51 km	5.0 mi	0
Feb 19, 1980	EF1	46 km	1.7 mi	0
Mar 14, 1979	EF1	46 km	2.0 mi	0
Apr 22, 1967	EF1	74 km	1.0 mi	0
Apr 22, 1967	EF1	44 km	0.1 mi	0
Apr 21, 1967	EF1	42 km	0.1 mi	0
May 19, 1957	EF1	34 km	0.1 mi	0
Mar 1, 2024	EF0	48 km	0.4 mi	0
May 19, 2019	EF0	49 km	0.4 mi	0

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

Tsunami History

1 tsunami recorded within 500 km.

Year	Location	Cause	Max Wave	Deaths	Distance
1901	MONTEREY BAY, N. CALIFORNIA	Eruption + Earthquake	—	—	73 km

Source: NOAA/NCEI Historical Tsunami Database.

Nearby Volcanoes

4 volcanoes within 200 km. Closest: Mammoth Mountain (153 km).

Name	Type	Elevation	Last Eruption	Distance
Mammoth Mountain	Lava dome(s)	3,369 m (11,053 ft)	1260	153 km
Mono-Inyo Craters	Lava dome(s)	2,796 m (9,173 ft)	1380	168 km
Golden Trout Creek	Volcanic field	2,886 m (9,469 ft)	-5550	169 km
Mono Lake Volcanic Field	Pyroclastic cone(s)	2,121 m (6,959 ft)	1790	186 km

Source: Smithsonian Institution Global Volcanism Program (GVP).

Wildfire History

20 wildfires (100+ acres) recorded within 100 km. Largest: GARZA (48,404 acres, 2017).

Year	Name	Acres Burned	Distance
2017	GARZA	48,404	73 km
2020	MINERAL	29,901	59 km
1993	ORCHARD	22,309	97 km
1996	SKYLINE	21,694	69 km
1985	LOSGATOSIV	20,357	43 km
2024	BOONE	17,701	60 km
1996	MERCY	16,993	63 km
1996	PANOCHE II	14,760	39 km
1984	BONANZA	12,105	69 km
2006	RICO	11,807	77 km
1989	POWERHOUSE	11,532	86 km
2017	ELM 2	10,765	62 km
2021	RIVER	10,183	87 km
2006	THREE ROCKS	9,336	30 km
1985	PONOCHE 2	7,508	53 km
2016	MINERAL	6,852	59 km
2009	GLORIA	6,686	100 km
1984	FLAT TOP	6,661	79 km
2015	WILLOW	5,990	98 km
1996	TRIMMER	5,694	82 km

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

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	46°F (8°C)	1.3 in	Coldest
February	51°F (11°C)	1.4 in	Wettest
March	56°F (13°C)	1.1 in
April	61°F (16°C)	0.5 in
May	67°F (20°C)	0.2 in
June	74°F (23°C)	0.0 in
July	80°F (27°C)	0.0 in	Warmest, Driest
August	78°F (25°C)	0.0 in
September	74°F (23°C)	0.2 in
October	66°F (19°C)	0.4 in
November	54°F (12°C)	0.9 in
December	46°F (8°C)	1.0 in

San Joaquin has a seasonal temperature swing of 34°F / from 46°F in January to 80°F in July. Total annual precipitation is 7.2 inches, with February being the wettest month (1.4") and July the driest (0.0").

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