Weather & Climate in Rohnert Park, CA

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

Rohnert Park enjoys a temperate climate with an average annual temperature of 59°F (15°C). Winters average 49°F in January while summers reach 67°F in July / relatively mild seasonal variation. The area gets 302 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 31.5 inches. Air quality is rated Good with a median AQI of 48. The city sits at an elevation of 108 feet.

Temperature

49°F Jan (10°C) 67°F Jul (19°C)

Annual Average	59.0°F
	9% above US avg
January Average	49°F (10°C)
July Average	67°F (19°C)
Sunny Days	302 days/yr

Geography

Elevation	108 ft (33 m)
Area	7.0 sq mi (18.2 km²)
Population Density	6,099/sq mi
Coordinates	38.3476°N, 122.7009°W
Timezone	America/Los_Angeles
County	Sonoma County County
Nearest Airport	Metro Oakland International (OAK) 51 miles away

Precipitation & Snow

Annual Rainfall 31.5"

17% below US avg

Snowfall 0.0"

Wettest Month (Jan) 7.20"

Driest Month (Jul) 0.08"

Air Quality

AQI Median	48.0
Rating	Good

Natural Hazard Risk

Overall Risk	Relatively High
Risk Score	99.1 / 100
Social Vulnerability	29.8 / 100
Community Resilience	66.2 / 100

Hazard Breakdown

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

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

Earthquake History

4,185 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M6.0.

Aug 24, 2014	The 2014 South Napa, California Earthquake	M6.0	37 km	11 km
Aug 10, 2016	20 km NNE of Upper Lake, California	M5.1	110 km	14 km
Sep 3, 2000	5 km WSW of Yountville, California	M4.9	25 km	9 km
Sep 4, 1995	13 km SW of Middletown, California	M4.8	38 km	7 km
Apr 18, 2007	15 km N of Potter Valley, California	M4.8	129 km	5 km
May 12, 2006	7 km W of Cobb, California	M4.7	53 km	4 km
May 21, 1996	8 km ESE of East Foothills, California	M4.7	140 km	8 km
Aug 11, 1993	14 km ESE of Alum Rock, California	M4.7	146 km	9 km
Jan 2, 2025	4 km NW of Cobb, CA	M4.7	56 km	1 km
Aug 18, 1999	0 km S of Bolinas, California	M4.6	49 km	8 km
Jan 11, 2000	6 km N of Geyserville, California	M4.6	50 km	6 km
Feb 18, 2004	4 km WNW of Cobb, California	M4.6	55 km	3 km
Jan 12, 2014	8 km W of Cobb, California	M4.5	53 km	2 km
Sep 25, 2012	3 km N of Talmage, California	M4.5	100 km	11 km
Aug 3, 2006	5 km W of Glen Ellen, California	M4.5	10 km	9 km
Jun 8, 2024	7 km NW of The Geysers, CA	M4.5	53 km	4 km
Sep 19, 1992	7 km NW of Cobb, California	M4.5	58 km	3 km
Apr 24, 2007	7 km WSW of Cobb, California	M4.5	50 km	2 km
Jun 3, 2023	2km NW of The Geysers, CA	M4.5	50 km	4 km
Mar 14, 2013	5 km W of Cobb, California	M4.4	52 km	1 km

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

Tornado History

33 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF2. Total: 1 injury.

Date	Rating	Distance	Path	Fatalities
Jun 1, 1958	EF2	26 km	15.0 mi	0
Mar 18, 2011	EF1	12 km	0.1 mi	0
Jan 23, 2010	EF1	95 km	1.6 mi	0
Mar 20, 2005	EF1	81 km	3.0 mi	0
Jan 27, 2005	EF1	47 km	0.5 mi	0
Dec 5, 1998	EF1	11 km	1.5 mi	0
Dec 23, 1996	EF1	23 km	6.0 mi	0
Feb 22, 1996	EF1	23 km	1.0 mi	0
Dec 2, 1992	EF1	25 km	3.0 mi	0
Dec 2, 1992	EF1	13 km	1.0 mi	0
Dec 2, 1992	EF1	18 km	7.5 mi	0
Feb 27, 1983	EF1	11 km	0.8 mi	0
Nov 10, 1964	EF1	22 km	1.0 mi	0
Feb 17, 1959	EF1	52 km	0.5 mi	0
Apr 1, 1958	EF1	87 km	0.2 mi	0
Sep 28, 2019	EF0	87 km	1.7 mi	0
Apr 27, 2016	EF0	54 km	0.2 mi	0
Feb 28, 2014	EF0	92 km	0.7 mi	0
Apr 7, 2011	EF0	52 km	0.1 mi	0
Mar 23, 2011	EF0	100 km	1.1 mi	0

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

Tsunami History

4 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	89 km
1856	N. CALIFORNIA	Eruption + Earthquake	0.6 m	-	101 km
1906	N. CALIFORNIA	Eruption + Earthquake	0.1 m	-	74 km
1865	N. CALIFORNIA	Eruption + Earthquake	-	-	146 km

Source: NOAA/NCEI Historical Tsunami Database.

Nearby Volcanoes

1 volcano within 200 km. Closest: Clear Lake (70 km).

Name	Type	Elevation	Last Eruption	Distance
Clear Lake	Volcanic field	1,439 m (4,721 ft)	Unknown	70 km

Source: Smithsonian Institution Global Volcanism Program (GVP).

Wildfire History

20 wildfires (100+ acres) recorded within 100 km. Largest: HENNESSEY (314,241 acres, 2020).

Year	Name	Acres Burned	Distance
2020	HENNESSEY	314,241	48 km
2015	ROCKY	96,125	66 km
2018	COUNTY	92,450	60 km
1996	FORK	83,209	95 km
2019	KINCADE	77,780	37 km
2015	VALLEY	77,507	50 km
2020	GLASS	68,020	26 km
2017	NUNS	56,883	17 km
2020	WALLBRIDGE	55,194	40 km
2017	ATLAS	51,664	41 km
2018	RIVER	48,920	83 km
2004	RUMSEY	39,335	59 km
1999	SIXTEEN	37,162	60 km
2017	TUBBS	36,981	25 km
1988	MILLER	35,750	54 km
2017	POCKET	18,691	50 km
2012	SIXTEEN COMPLEX	18,191	81 km
2006	ZAM ASSIST	14,404	83 km
2008	WALKER	12,441	82 km
2004	GEYSERS	12,075	43 km

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

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	49°F (10°C)	7.2 in	Wettest
February	51°F (11°C)	6.3 in
March	53°F (12°C)	5.0 in
April	56°F (14°C)	1.8 in
May	61°F (16°C)	0.8 in
June	66°F (19°C)	0.2 in
July	67°F (19°C)	0.1 in	Driest
August	68°F (20°C)	0.1 in	Warmest
September	67°F (19°C)	0.5 in
October	62°F (16°C)	2.0 in
November	53°F (12°C)	5.0 in
December	47°F (9°C)	5.3 in	Coldest

Rohnert Park has a seasonal temperature swing of 21°F / from 47°F in December to 68°F in August. Total annual precipitation is 34.2 inches, with January being the wettest month (7.2") and July the driest (0.1").

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