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Weather & Climate in East Porterville, CA

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

East Porterville enjoys a temperate climate with an average annual temperature of 63°F (17°C). Winters average 47°F in January while summers reach 81°F in July. The area gets 323 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 22.5 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 492 feet.

Temperature

47°F Jan (8°C) 81°F Jul (27°C)
Annual Average62.5°F
16% above US avg
January Average47°F (8°C)
July Average81°F (27°C)
Sunny Days323 days/yr

Geography

Elevation492 ft (150 m)
Area3.0 sq mi (7.8 km²)
Population Density2,154/sq mi
Coordinates36.0582°N, 118.9749°W
TimezoneAmerica/Los_Angeles
CountyTulare County County
Nearest AirportFresno Yosemite International (FAT)
65 miles away

Precipitation & Snow

Annual Rainfall 22.5"
41% below US avg
Snowfall 0.0"
Wettest Month (Jan) 2.20"
Driest Month (Jul) 0.04"

Air Quality

AQI Median48.0
RatingGood

Natural Hazard Risk

Overall RiskRelatively High
Risk Score97.0 / 100
Social Vulnerability61.9 / 100
Community Resilience8.0 / 100

Hazard Breakdown

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

Earthquake History

7,200 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M7.1.

Jul 6, 2019 Ridgecrest Earthquake Sequence M7.1 128 km 8 km
Jul 4, 2019 Ridgecrest Earthquake Sequence M6.4 138 km 11 km
Sep 28, 2004 2004 Parkfield, California Earthquake M6.0 128 km 8 km
Jun 24, 2020 18km SSE of Lone Pine, CA M5.8 100 km 5 km
Sep 20, 1995 16km NNE of Ridgecrest, California M5.8 125 km 5 km
Jul 11, 1992 12km NW of California City, California M5.7 125 km 10 km
Jun 4, 2020 17km S of Searles Valley, CA M5.5 148 km 8 km
Jul 6, 2019 15km ESE of Little Lake, CA M5.5 112 km 5 km
Jul 6, 2019 20km E of Little Lake, CA M5.4 117 km 7 km
Jul 5, 2019 16km W of Searles Valley, CA M5.4 130 km 7 km
Aug 17, 1995 17km N of Ridgecrest, California M5.4 122 km 5 km
Nov 27, 1996 27km E of Coso Junction, California M5.3 119 km 0 km
Mar 6, 1998 28km E of Coso Junction, California M5.2 120 km 0 km
Aug 7, 2024 24 km SW of Lamont, CA M5.2 106 km 12 km
Oct 3, 2009 18km NE of Olancha, CA M5.2 107 km -2 km
May 28, 1993 21km SW of Lamont, California M5.2 102 km 21 km
Jan 7, 1996 16km N of Ridgecrest, California M5.2 124 km 3 km
Jul 17, 2001 7km ESE of Coso Junction, CA M5.2 99 km 2 km
Mar 7, 1998 30km E of Coso Junction, California M5.0 122 km 0 km
Sep 29, 2004 25km SSW of Bodfish, California M5.0 81 km 3 km
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.

Tornado History

39 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF2. Total: 3 injuries.

Date Rating Distance Path Fatalities
Apr 5, 1980 EF2 74 km 15.0 mi 0
Nov 22, 1996 EF1 91 km 0.8 mi 0
Feb 28, 1991 EF1 54 km 0.2 mi 0
Mar 8, 1986 EF1 82 km 4.0 mi 0
Mar 28, 1982 EF1 81 km 5.0 mi 0
Mar 14, 1979 EF1 87 km 2.0 mi 0
Nov 1, 1964 EF1 53 km 1.0 mi 0
Feb 19, 1962 EF1 45 km 0.6 mi 0
Jun 2, 2019 EF0 84 km 0.2 mi 0
May 19, 2019 EF0 93 km 0.4 mi 0
Mar 22, 2018 EF0 54 km 1.2 mi 0
Feb 12, 2018 EF0 83 km 0.3 mi 0
Feb 23, 2015 EF0 98 km 0.5 mi 0
Nov 9, 2012 EF0 29 km 0.3 mi 0
Feb 27, 2010 EF0 88 km 0.5 mi 0
Jan 27, 2008 EF0 46 km 2.0 mi 0
May 9, 2005 EF0 90 km — 0
Oct 20, 2004 EF0 56 km 0.5 mi 0
Jul 7, 2004 EF0 85 km — 0
Feb 27, 2000 EF0 97 km 0.2 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 — — 137 km
Source: NOAA/NCEI Historical Tsunami Database.

Nearby Volcanoes

4 volcanoes within 200 km. Closest: Golden Trout Creek (68 km).

Name Type Elevation Last Eruption Distance
Golden Trout Creek Volcanic field 2,886 m (9,469 ft) -5550 68 km
Ubehebe Craters Maar(s) 752 m (2,467 ft) -150 173 km
Mammoth Mountain Lava dome(s) 3,369 m (11,053 ft) 1260 175 km
Mono-Inyo Craters Lava dome(s) 2,796 m (9,173 ft) 1380 194 km
Source: Smithsonian Institution Global Volcanism Program (GVP).

Wildfire History

20 wildfires (100+ acres) recorded within 100 km. Largest: CASTLE (174,424 acres, 2020).

Year Name Acres Burned Distance
2020 CASTLE 174,424 41 km
2002 MCNALLY 146,540 52 km
2015 ROUGH 146,369 89 km
2021 WINDY 97,831 35 km
2021 KNP COMPLEX 89,960 60 km
2000 MANTER 76,158 73 km
2016 ERSKINE 48,066 79 km
1997 LOKERN 46,139 95 km
2017 PIER 36,626 25 km
2008 PIUTE 36,251 85 km
2016 CEDAR 29,191 47 km
2021 FRENCH 27,331 55 km
2011 BRECKENRIDGE COMPLEX 27,229 78 km
1984 BODFISH 23,189 75 km
1990 STORMY 23,157 49 km
1996 SKYLINE 21,694 96 km
2017 LION 18,576 52 km
2011 LION 17,671 48 km
2010 BULL 17,238 55 km
2017 SCHAEFFER 16,100 55 km
Source: NIFC/IRWIN Wildfire Records (100+ acres).

Monthly Weather

Month Avg Temperature Precipitation Summary
January 47°F (8°C) 2.2 in Coldest, Wettest
February 52°F (11°C) 2.1 in
March 56°F (13°C) 2.1 in
April 61°F (16°C) 1.1 in
May 69°F (21°C) 0.4 in
June 77°F (25°C) 0.1 in
July 81°F (27°C) 0.0 in Warmest, Driest
August 81°F (27°C) 0.0 in
September 76°F (24°C) 0.4 in
October 67°F (19°C) 0.6 in
November 55°F (13°C) 1.6 in
December 48°F (9°C) 1.7 in

East Porterville has a seasonal temperature swing of 34°F / from 47°F in January to 81°F in July. Total annual precipitation is 12.4 inches, with January being the wettest month (2.2") and July the driest (0.0").

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