Weather & Climate in Norris Canyon, CA

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

Norris Canyon enjoys a temperate climate with an average annual temperature of 60°F (15°C). Winters average 51°F in January while summers reach 66°F in July / relatively mild seasonal variation. Annual precipitation totals 16.0 inches (drier than the 38-inch national average). Air quality is rated Good with a median AQI of 49. 53% of days have good air quality. The city sits at an elevation of 1,136 feet.

Temperature

51°F Jan (11°C) 66°F Jul (19°C)
Annual Average59.7°F
11% above US avg
January Average51°F (11°C)
July Average66°F (19°C)

Geography

Elevation1,136 ft (346 m)
Area3.5 sq mi (9.2 km²)
Population Density234/sq mi
Coordinates37.7458°N, 121.9881°W
TimezoneAmerica/Los_Angeles
CountyAlameda County County
Nearest AirportMetro Oakland International (OAK)
13 miles away

Precipitation & Snow

Annual Rainfall 16.0"
58% below US avg
Snowfall 0.7"
Wettest Month (Dec) 3.20"
Driest Month (Sep) 0.08"

Air Quality

AQI Median49.0
RatingGood
Good Days %53.0%
Unhealthy Days1

Natural Hazard Risk

Overall RiskVery High
Risk Score99.8 / 100
Social Vulnerability27.5 / 100
Community Resilience91.2 / 100

Hazard Breakdown

Tornado Relatively Moderate
Earthquake Very High
Wildfire Relatively High
Flood Very High
Hail Relatively Low
Strong Wind Very Low
Heat Wave Relatively High
Winter Weather Very Low
Lightning Relatively Low
Drought Relatively Moderate
Cold Wave No Rating
Landslide Relatively High
Coastal Flood Relatively High
Tsunami Relatively Low
Volcano Very Low
Avalanche Very Low
Source: FEMA National Risk Index v1.20 (Dec 2025)

Earthquake History

6,017 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 59 km 11 km
Apr 18, 1990 5 km NNW of Aromas, California M5.4 95 km 5 km
Aug 12, 1998 10 km SW of Ridgemark, California M5.1 120 km 9 km
Apr 18, 1990 4 km E of Interlaken, California M5.1 92 km 7 km
Jan 16, 1993 9 km E of Gilroy, California M4.9 93 km 7 km
Apr 23, 1995 22 km NNE of Soledad, California M4.9 145 km 7 km
May 14, 2002 5 km SSW of Gilroy, California M4.9 93 km 7 km
Apr 18, 1990 4 km NNW of Aromas, California M4.9 95 km 6 km
Sep 3, 2000 5 km WSW of Yountville, California M4.9 80 km 9 km
Apr 19, 1996 2 km E of Aromas, California M4.9 101 km 5 km
Sep 4, 1995 13 km SW of Middletown, California M4.8 123 km 7 km
May 12, 2006 7 km W of Cobb, California M4.7 139 km 4 km
May 21, 1996 8 km ESE of East Foothills, California M4.7 49 km 8 km
Apr 18, 1990 4 km N of Aromas, California M4.7 96 km 4 km
Aug 11, 1993 14 km ESE of Alum Rock, California M4.7 55 km 9 km
Jan 2, 2025 4 km NW of Cobb, CA M4.7 140 km 1 km
Aug 27, 2011 21 km NE of Soledad, California M4.6 148 km 8 km
Mar 24, 1991 1 km NNE of Interlaken, California M4.6 90 km 15 km
Aug 18, 1999 0 km S of Bolinas, California M4.6 64 km 8 km
Jan 11, 2000 6 km N of Geyserville, California M4.6 140 km 6 km
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.

Tornado History

63 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF2. Total: 9 injuries.

Date Rating Distance Path Fatalities
May 5, 1998 EF2 42 km 0.6 mi 0
Apr 27, 1953 EF2 88 km 0.1 mi 0
Jan 11, 1951 EF2 43 km 5.7 mi 0
Dec 14, 2024 EF1 78 km 0.3 mi 0
Jan 23, 2010 EF1 27 km 1.6 mi 0
Apr 14, 2006 EF1 88 km 0.5 mi 0
Mar 20, 2005 EF1 40 km 3.0 mi 0
Dec 20, 2001 EF1 88 km 0.5 mi 0
May 5, 1998 EF1 42 km 0.3 mi 0
Dec 23, 1996 EF1 100 km 6.0 mi 0
Apr 19, 1988 EF1 87 km 0.2 mi 0
Jan 14, 1980 EF1 31 km 0.3 mi 0
Mar 1, 1978 EF1 94 km 1.5 mi 0
May 31, 1967 EF1 65 km 0.1 mi 0
Apr 1, 1965 EF1 87 km 0.1 mi 0
Apr 1, 1958 EF1 35 km 0.2 mi 0
Jan 14, 2023 EF0 98 km 0.3 mi 0
Nov 8, 2022 EF0 87 km 0.8 mi 0
Sep 28, 2019 EF0 95 km 1.7 mi 0
Jan 6, 2019 EF0 88 km 0.1 mi 0
Source: NOAA Storm Prediction Center (EF0+, 1950-2024, US only).

Tsunami History

5 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 11 km
1989 N. CALIFORNIA Earthquake 1.0 m 62 80 km
1856 N. CALIFORNIA Eruption + Earthquake 0.6 m - 39 km
1906 N. CALIFORNIA Eruption + Earthquake 0.1 m - 45 km
1865 N. CALIFORNIA Eruption + Earthquake - - 61 km
Source: NOAA/NCEI Historical Tsunami Database.

Nearby Volcanoes

1 volcano within 200 km. Closest: Clear Lake (152 km).

Name Type Elevation Last Eruption Distance
Clear Lake Volcanic field 1,439 m (4,721 ft) Unknown 152 km
Source: Smithsonian Institution Global Volcanism Program (GVP).

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 51 km
2020 CZU AUG LIGHTNING 85,894 70 km
2017 NUNS 56,883 81 km
2017 ATLAS 51,664 72 km
2007 LICK 47,424 76 km
2006 CANYON 36,851 71 km
1988 MILLER 35,750 77 km
2003 ANNIE 17,383 87 km
2024 CORRAL 16,138 48 km
2009 CORRAL 12,006 47 km
1995 VISION 11,931 84 km
1985 LEXINGTON 11,550 67 km
2015 WRAGG 8,455 82 km
2009 LOCKHEED 8,287 77 km
2003 BIRD 7,727 61 km
2014 MONTICELLO 6,984 88 km
1984 SITE 300 3 6,911 46 km
2005 TESLA 6,638 38 km
2003 DEL PUERTO 6,441 62 km
2016 COLD 6,289 88 km
Source: NIFC/IRWIN Wildfire Records (100+ acres).

Monthly Weather

Month Avg Temperature Precipitation Summary
January 51°F (11°C) 2.9 in Coldest
February 54°F (12°C) 3.1 in
March 56°F (13°C) 2.4 in
April 58°F (15°C) 1.2 in
May 61°F (16°C) 0.6 in
June 65°F (18°C) 0.2 in
July 66°F (19°C) 0.0 in Driest
August 67°F (20°C) 0.1 in Warmest
September 67°F (20°C) 0.1 in
October 64°F (18°C) 0.8 in
November 56°F (13°C) 1.5 in
December 51°F (11°C) 3.2 in Wettest

Norris Canyon has a seasonal temperature swing of 16°F / from 51°F in January to 67°F in August. Total annual precipitation is 16.0 inches, with December being the wettest month (3.2") and July the driest (0.0").

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