Weather & Climate in Ukiah, CA

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

Ukiah enjoys a temperate climate with an average annual temperature of 59°F (15°C). Winters average 47°F in January while summers reach 73°F in July. 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 38.9 inches. Air quality is rated Good with a median AQI of 48. The city sits at an elevation of 646 feet.

Temperature

47°F Jan (8°C) 73°F Jul (23°C)

Annual Average	58.9°F
	9% above US avg
January Average	47°F (8°C)
July Average	73°F (23°C)
Sunny Days	302 days/yr

Geography

Elevation	646 ft (197 m)
Area	4.7 sq mi (12.2 km²)
Population Density	2,991/sq mi
Coordinates	39.1466°N, 123.2103°W
Timezone	America/Los_Angeles
County	Mendocino County County
Nearest Airport	Chico Regional (CIC) 83 miles away

Precipitation & Snow

Annual Rainfall 38.9"

2% above US avg

Snowfall 0.0"

Wettest Month (Jan) 9.29"

Driest Month (Jul) 0.08"

Air Quality

AQI Median	48.0
Rating	Good

Natural Hazard Risk

Overall Risk	Relatively High
Risk Score	94.3 / 100
Social Vulnerability	76.8 / 100
Community Resilience	39.0 / 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 Low
Winter Weather	Very Low
Lightning	Relatively Low
Drought	Relatively High
Cold Wave	No Rating
Landslide	Relatively High
Coastal Flood	Relatively Low
Tsunami	Very Low
Volcano	Very Low
Avalanche	Very Low

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

Earthquake History

3,694 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	130 km	11 km
Aug 10, 2016	20 km NNE of Upper Lake, California	M5.1	41 km	14 km
Sep 3, 2000	5 km WSW of Yountville, California	M4.9	110 km	9 km
Sep 4, 1995	13 km SW of Middletown, California	M4.8	66 km	7 km
Apr 18, 2007	15 km N of Potter Valley, California	M4.8	36 km	5 km
May 12, 2006	7 km W of Cobb, California	M4.7	50 km	4 km
Jan 19, 2008	31 km NW of Rancho Tehama Reserve, California	M4.7	123 km	2 km
Jan 2, 2025	4 km NW of Cobb, CA	M4.7	52 km	1 km
Aug 18, 1999	0 km S of Bolinas, California	M4.6	145 km	8 km
Jan 11, 2000	6 km N of Geyserville, California	M4.6	49 km	6 km
Feb 18, 2004	4 km WNW of Cobb, California	M4.6	52 km	3 km
Jan 12, 2014	8 km W of Cobb, California	M4.5	50 km	2 km
Sep 25, 2012	3 km N of Talmage, California	M4.5	5 km	11 km
Jan 19, 2008	34 km WNW of Rancho Tehama Reserve, California	M4.5	120 km	10 km
Aug 3, 2006	5 km W of Glen Ellen, California	M4.5	102 km	9 km
Aug 28, 2016	8 km ESE of Mad River, California	M4.5	144 km	36 km
Jun 8, 2024	7 km NW of The Geysers, CA	M4.5	50 km	4 km
Sep 19, 1992	7 km NW of Cobb, California	M4.5	48 km	3 km
Apr 24, 2007	7 km WSW of Cobb, California	M4.5	53 km	2 km
Jun 3, 2023	2km NW of The Geysers, CA	M4.5	54 km	4 km

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

Tornado History

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

Date	Rating	Distance	Path	Fatalities
Jun 1, 1958	EF2	98 km	15.0 mi	0
May 25, 2011	EF1	96 km	26.4 mi	0
Mar 18, 2011	EF1	89 km	0.1 mi	0
Jan 27, 2005	EF1	59 km	0.5 mi	0
Dec 5, 1998	EF1	61 km	1.7 mi	0
Dec 5, 1998	EF1	89 km	1.5 mi	0
Feb 22, 1996	EF1	78 km	1.0 mi	0
Dec 2, 1992	EF1	87 km	7.5 mi	0
Dec 2, 1992	EF1	75 km	3.0 mi	0
Dec 2, 1992	EF1	89 km	1.0 mi	0
Feb 27, 1983	EF1	89 km	0.8 mi	0
Nov 10, 1964	EF1	77 km	1.0 mi	0
Feb 17, 1959	EF1	70 km	0.5 mi	0
Feb 19, 2013	EF0	83 km	0.3 mi	0
Mar 23, 2011	EF0	90 km	1.1 mi	0
Mar 21, 2011	EF0	85 km	0.3 mi	0
Mar 8, 2010	EF0	86 km	0.3 mi	0
Dec 29, 2004	EF0	89 km	0.2 mi	0
Jul 5, 2000	EF0	98 km	0.2 mi	0
Dec 11, 1983	EF0	1 km	2.0 mi	0

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

Nearby Volcanoes

1 volcano within 200 km. Closest: Clear Lake (43 km).

Name	Type	Elevation	Last Eruption	Distance
Clear Lake	Volcanic field	1,439 m (4,721 ft)	Unknown	43 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	90 km
2018	RANCH	427,048	40 km
2020	HENNESSEY	314,241	99 km
2015	ROCKY	96,125	71 km
1996	FORK	83,209	41 km
2019	KINCADE	77,780	65 km
2015	VALLEY	77,507	65 km
2020	GLASS	68,020	88 km
2020	WALLBRIDGE	55,194	61 km
1987	MENDENHALL	54,162	46 km
2018	RIVER	48,920	19 km
2012	NORTH PASS	43,689	84 km
2004	RUMSEY	39,335	92 km
1999	SIXTEEN	37,162	85 km
2017	TUBBS	36,981	79 km
2017	REDWOOD VALLEY INCIDENT	36,545	21 km
2012	MILL	29,924	54 km
2001	TROUGH	25,270	52 km
2017	POCKET	18,691	51 km
2012	SIXTEEN COMPLEX	18,191	80 km

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

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	47°F (8°C)	9.3 in	Wettest
February	47°F (8°C)	7.1 in
March	48°F (9°C)	6.5 in
April	51°F (11°C)	2.9 in
May	56°F (13°C)	0.9 in
June	62°F (17°C)	0.3 in
July	73°F (23°C)	0.1 in	Warmest, Driest
August	68°F (20°C)	0.3 in
September	66°F (19°C)	0.8 in
October	59°F (15°C)	2.7 in
November	50°F (10°C)	7.1 in
December	45°F (7°C)	7.9 in	Coldest

Ukiah has a seasonal temperature swing of 28°F / from 45°F in December to 73°F in July. Total annual precipitation is 45.7 inches, with January being the wettest month (9.3") and July the driest (0.1").

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