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Weather & Climate in Tranquillity, CA
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Tranquillity 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 Good with a median AQI of 48. The city sits at an elevation of 156 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 | 156 ft (48 m) |
| Area | 0.6 sq mi (1.6 km²) |
| Population Density | 1,140/sq mi |
| Coordinates | 36.6480°N, 120.2525°W |
| Timezone | America/Los_Angeles |
| County | Fresno County County |
| Nearest Airport | Fresno Yosemite International (FAT) 31 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 48.0 |
| Rating | Good |
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
4,917 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M6.0.
| Sep 28, 2004 | 2004 Parkfield, California Earthquake | M6.0 | 93 km | 8 km |
| Apr 18, 1990 | 5 km NNW of Aromas, California | M5.4 | 129 km | 5 km |
| Oct 21, 2012 | 24 km NE of San Lucas, California | M5.3 | 66 km | 9 km |
| Sep 17, 1991 | 22 km NW of San Simeon, California | M5.2 | 135 km | 9 km |
| Aug 12, 1998 | 10 km SW of Ridgemark, California | M5.1 | 108 km | 9 km |
| Apr 18, 1990 | 4 km E of Interlaken, California | M5.1 | 132 km | 7 km |
| Sep 29, 2004 | 8 km NW of Parkfield, California | M5.0 | 80 km | 11 km |
| Jan 16, 1993 | 9 km E of Gilroy, California | M4.9 | 115 km | 7 km |
| Dec 20, 1994 | 3 km NW of Parkfield, California | M4.9 | 83 km | 8 km |
| Apr 23, 1995 | 22 km NNE of Soledad, California | M4.9 | 85 km | 7 km |
| Apr 18, 1990 | 4 km NNW of Aromas, California | M4.9 | 129 km | 6 km |
| May 14, 2002 | 5 km SSW of Gilroy, California | M4.9 | 125 km | 7 km |
| Apr 19, 1996 | 2 km E of Aromas, California | M4.9 | 124 km | 5 km |
| Sep 30, 2004 | 13 km NW of Parkfield, California | M4.9 | 78 km | 10 km |
| Feb 24, 2016 | 6km SSW of Wasco, CA | M4.9 | 146 km | 22 km |
| Nov 14, 1993 | 8 km NW of Parkfield, California | M4.8 | 80 km | 11 km |
| Sep 28, 2004 | 12 km SE of Parkfield, California | M4.7 | 94 km | 6 km |
| Feb 4, 1991 | 33 km SE of Big Sur, California | M4.7 | 136 km | 9 km |
| Apr 18, 1990 | 4 km N of Aromas, California | M4.7 | 128 km | 4 km |
| Aug 11, 1993 | 14 km ESE of Alum Rock, California | M4.7 | 147 km | 9 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
75 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF2. Total: 5 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Apr 5, 1980 | EF2 | 58 km | 15.0 mi | 0 |
| Mar 22, 1962 | EF2 | 44 km | 0.5 mi | 0 |
| Jan 17, 2019 | EF1 | 65 km | 0.3 mi | 0 |
| Dec 16, 2002 | EF1 | 80 km | 1.3 mi | 0 |
| May 20, 2002 | EF1 | 34 km | 2.7 mi | 0 |
| Feb 14, 1998 | EF1 | 32 km | 3.0 mi | 0 |
| Nov 22, 1996 | EF1 | 46 km | 0.8 mi | 0 |
| Nov 22, 1996 | EF1 | 78 km | 0.2 mi | 0 |
| Jan 14, 1995 | EF1 | 53 km | 1.0 mi | 0 |
| Feb 28, 1991 | EF1 | 79 km | 0.2 mi | 0 |
| Mar 8, 1986 | EF1 | 55 km | 4.0 mi | 0 |
| Mar 28, 1982 | EF1 | 57 km | 5.0 mi | 0 |
| Feb 19, 1980 | EF1 | 49 km | 1.7 mi | 0 |
| Mar 14, 1979 | EF1 | 52 km | 2.0 mi | 0 |
| Apr 22, 1967 | EF1 | 67 km | 1.0 mi | 0 |
| Apr 22, 1967 | EF1 | 38 km | 0.1 mi | 0 |
| Apr 21, 1967 | EF1 | 39 km | 0.1 mi | 0 |
| May 19, 1957 | EF1 | 38 km | 0.1 mi | 0 |
| Mar 1, 2024 | EF0 | 45 km | 0.4 mi | 0 |
| May 19, 2019 | EF0 | 55 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 | — | — | 75 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
4 volcanoes within 200 km. Closest: Mammoth Mountain (154 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Mammoth Mountain | Lava dome(s) | 3,369 m (11,053 ft) | 1260 | 154 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 | 176 km |
| Mono Lake Volcanic Field | Pyroclastic cone(s) | 2,121 m (6,959 ft) | 1790 | 185 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 | 77 km |
| 2020 | MINERAL | 29,901 | 60 km |
| 1996 | SKYLINE | 21,694 | 75 km |
| 1985 | LOSGATOSIV | 20,357 | 42 km |
| 2024 | BOONE | 17,701 | 60 km |
| 1996 | MERCY | 16,993 | 56 km |
| 1996 | PANOCHE II | 14,760 | 34 km |
| 1984 | BONANZA | 12,105 | 62 km |
| 2006 | RICO | 11,807 | 77 km |
| 1989 | POWERHOUSE | 11,532 | 87 km |
| 2017 | ELM 2 | 10,765 | 65 km |
| 2021 | RIVER | 10,183 | 85 km |
| 2006 | THREE ROCKS | 9,336 | 28 km |
| 1985 | PONOCHE 2 | 7,508 | 47 km |
| 2016 | MINERAL | 6,852 | 61 km |
| 2009 | GLORIA | 6,686 | 95 km |
| 1984 | FLAT TOP | 6,661 | 84 km |
| 2015 | WILLOW | 5,990 | 99 km |
| 1996 | TRIMMER | 5,694 | 85 km |
| 1993 | PGE 4 | 5,594 | 61 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 |
Tranquillity 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").