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Weather & Climate in Port O'Connor, TX
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Port O'Connor has a warm climate with an average annual temperature of 72°F (22°C). Winters average 56°F in January while summers reach 84°F in July. The area gets 319 sunny days per year, well above the U.S. average of 205 / making it one of the sunnier locations in the country. Air quality is rated Good with a median AQI of 42. The city sits at an elevation of 7 feet.
Temperature
56°F Jan (13°C)
84°F Jul (29°C)
| Annual Average | 71.5°F |
| 32% above US avg | |
| January Average | 56°F (13°C) |
| July Average | 84°F (29°C) |
| Sunny Days | 319 days/yr |
Geography
| Elevation | 7 ft (2 m) |
| Area | 6.3 sq mi (16.4 km²) |
| Population Density | 175/sq mi |
| Coordinates | 28.4460°N, 96.4201°W |
| Timezone | America/Chicago |
| County | Calhoun County County |
| Nearest Airport | Victoria Regional (VCT) 41 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 42.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 66.3 / 100 |
| Social Vulnerability | 63.2 / 100 |
| Community Resilience | 73.9 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Relatively Moderate |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Relatively Low |
| Hail | Very Low |
| Strong Wind | Very Low |
| Heat Wave | Relatively Low |
| Winter Weather | Very Low |
| Lightning | Relatively Moderate |
| Ice Storm | Relatively Low |
| Drought | Relatively High |
| Cold Wave | Relatively Moderate |
| Landslide | Very Low |
| Coastal Flood | Relatively Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
48 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.4.
| Apr 10, 2021 | 10 km SSE of Smiley, Texas | M3.4 | 142 km | 5 km |
| Feb 7, 2021 | 8 km ESE of Smiley, Texas | M3.2 | 141 km | 6 km |
| May 14, 2019 | 1 km SSE of Smiley, Texas | M3.1 | 148 km | 5 km |
| Feb 19, 2015 | 3 km N of Hallettsville, Texas | M3.1 | 125 km | 5 km |
| May 12, 2019 | 18 km N of Yorktown, Texas | M3.1 | 129 km | 5 km |
| Feb 3, 2019 | 13 km ESE of Smiley, Texas | M3.0 | 137 km | 5 km |
| Jan 1, 2024 | 18 km S of Gonzales, Texas | M3.0 | 140 km | 3 km |
| Mar 4, 2019 | 11 km SE of Cuero, Texas | M3.0 | 100 km | 5 km |
| Aug 19, 2022 | 11 km E of Smiley, Texas | M2.9 | 142 km | 7 km |
| Sep 1, 2023 | 1 km NNW of Nordheim, Texas | M2.9 | 129 km | 7 km |
| Jul 21, 2021 | 11 km S of Smiley, Texas | M2.9 | 142 km | 5 km |
| Aug 18, 2023 | 3 km NNW of Nordheim, Texas | M2.9 | 130 km | 4 km |
| May 22, 2023 | 16 km S of Smiley, Texas | M2.9 | 142 km | 5 km |
| May 17, 2019 | 12 km ESE of Smiley, Texas | M2.9 | 138 km | 7 km |
| Jul 12, 2022 | 12 km WNW of Yorktown, Texas | M2.8 | 133 km | 7 km |
| Jun 16, 2022 | 17 km E of Smiley, Texas | M2.8 | 137 km | 7 km |
| May 14, 2017 | 16 km NNW of Yorktown, Texas | M2.8 | 133 km | 2 km |
| Apr 8, 2021 | 9 km SSE of Smiley, Texas | M2.8 | 142 km | 8 km |
| May 4, 2023 | 17 km S of Nixon, Texas | M2.7 | 148 km | 7 km |
| Jan 4, 1995 | 1 km NW of Hallettsville, Texas | M2.7 | 123 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Hurricane History
16 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 4.
| Year | Name | Category | Max Wind | Closest |
| 2024 | Beryl | Category 1 | 92 mph | 45 km |
| 2021 | Nicholas | Category 1 | 75 mph | 53 km |
| 2020 | Delta | Category 3 | 121 mph | 260 km |
| 2020 | Hanna | Category 1 | 92 mph | 155 km |
| 2017 | Harvey | Category 4 | 132 mph | 68 km |
| 2008 | Dolly | Category 2 | 98 mph | 240 km |
| 2008 | Ike | Category 2 | 109 mph | 192 km |
| 2007 | Humberto | Category 1 | 92 mph | 196 km |
| 2005 | Rita | Category 3 | 115 mph | 294 km |
| 2003 | Claudette | Category 1 | 92 mph | 27 km |
| 1999 | Bret | Category 4 | 144 mph | 195 km |
| 1989 | Chantal | Category 1 | 81 mph | 235 km |
| 1989 | Jerry | Category 1 | 86 mph | 156 km |
| 1986 | Bonnie | Category 1 | 86 mph | 250 km |
| 1983 | Alicia | Category 3 | 115 mph | 148 km |
| 1980 | Allen | Category 3 | 127 mph | 255 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Tornado History
250 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF3. Total: 4 fatalities, 57 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Dec 24, 1975 | EF3 | 64 km | 1.0 mi | 0 |
| Apr 11, 1969 | EF3 | 85 km | 2.0 mi | 0 |
| Nov 5, 1968 | EF3 | 69 km | 14.4 mi | 0 |
| Sep 20, 1967 | EF3 | 70 km | 0.1 mi | 0 |
| Sep 20, 1967 | EF3 | 75 km | 1.5 mi | 0 |
| Sep 20, 1967 | EF3 | 34 km | 1.0 mi | 4 |
| Feb 9, 1966 | EF3 | 63 km | 2.0 mi | 0 |
| Jun 2, 2010 | EF2 | 82 km | 3.8 mi | 0 |
| Oct 29, 1972 | EF2 | 39 km | 10.8 mi | 0 |
| May 7, 1972 | EF2 | 28 km | 0.1 mi | 0 |
| Aug 3, 1970 | EF2 | 6 km | 0.1 mi | 0 |
| Sep 20, 1967 | EF2 | 32 km | 15.4 mi | 0 |
| Apr 14, 1966 | EF2 | 100 km | 1.0 mi | 0 |
| May 18, 1965 | EF2 | 85 km | 11.2 mi | 0 |
| Jun 15, 1964 | EF2 | 100 km | 1.5 mi | 0 |
| Nov 2, 1961 | EF2 | 28 km | 0.3 mi | 0 |
| Sep 11, 1961 | EF2 | 80 km | 0.4 mi | 0 |
| May 18, 1955 | EF2 | 34 km | 2.5 mi | 0 |
| Dec 2, 1953 | EF2 | 92 km | 1.5 mi | 0 |
| Oct 23, 1953 | EF2 | 94 km | 4.1 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Wildfire History
20 wildfires (100+ acres) recorded within 100 km. Largest: MATAGORDA B5 (7,817 acres, 2012).
| Year | Name | Acres Burned | Distance |
| 2012 | MATAGORDA B5 | 7,817 | 18 km |
| 1988 | UNNAMED | 6,236 | 52 km |
| 1999 | UNNAMED | 4,966 | 53 km |
| 2008 | UNNAMED | 4,589 | 65 km |
| 2008 | COW TRAP 2008 | 4,335 | 94 km |
| 2017 | 2018 NORTH SARGENT WF | 3,959 | 88 km |
| 2001 | SAVANNAH S | 3,866 | 47 km |
| 1996 | UNNAMED | 3,320 | 59 km |
| 2009 | ROAD PASTURE 2009 | 3,197 | 98 km |
| 2006 | UNNAMED | 3,162 | 19 km |
| 1992 | SMITH MARSH | 3,057 | 92 km |
| 2006 | CATTAILS | 3,046 | 95 km |
| 2018 | TXMAR-FY18-RX-MATAGORDA ISLAND WUI | 3,024 | 45 km |
| 2019 | TXARR-FY19-RX-MATAGORDA G5 | 2,924 | 55 km |
| 2009 | 2009 MI A 5 | 2,844 | 47 km |
| 2020 | T-10 UNIT | 2,821 | 58 km |
| 2016 | MATAGORDA ISLAND WUI FY 2016 | 2,794 | 55 km |
| 2019 | TXARR-FY19-RX-TATTON SOUTH | 2,641 | 54 km |
| 2008 | 2009 MI B 7 | 2,608 | 32 km |
| 1985 | UNIT 32 | 2,553 | 57 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 56°F (13°C) | 3.0 in | Coldest |
| February | 58°F (15°C) | 2.6 in | |
| March | 65°F (18°C) | 1.7 in | Driest |
| April | 70°F (21°C) | 2.1 in | |
| May | 77°F (25°C) | 4.1 in | |
| June | 82°F (28°C) | 4.1 in | |
| July | 84°F (29°C) | 3.7 in | Warmest |
| August | 84°F (29°C) | 3.4 in | |
| September | 80°F (27°C) | 6.3 in | Wettest |
| October | 73°F (23°C) | 4.2 in | |
| November | 65°F (18°C) | 2.9 in | |
| December | 58°F (14°C) | 2.5 in |
Port O'Connor has a seasonal temperature swing of 28°F / from 56°F in January to 84°F in July. Total annual precipitation is 40.4 inches, with September being the wettest month (6.3") and March the driest (1.7").