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Weather & Climate in Port Mansfield, TX
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Port Mansfield has a warm climate with an average annual temperature of 73°F (23°C). Winters average 59°F in January while summers reach 84°F in July. The area gets 312 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 25.3 inches (drier than the 38-inch national average). Air quality is rated Good with a median AQI of 42. The city sits at an elevation of 3 feet.
Temperature
59°F Jan (15°C)
84°F Jul (29°C)
| Annual Average | 73.4°F |
| 36% above US avg | |
| January Average | 59°F (15°C) |
| July Average | 84°F (29°C) |
| Sunny Days | 312 days/yr |
Geography
| Elevation | 3 ft (1 m) |
| Area | 6.4 sq mi (16.5 km²) |
| Population Density | 32/sq mi |
| Coordinates | 26.5694°N, 97.4424°W |
| Timezone | America/Chicago |
| County | Willacy County County |
| Nearest Airport | Valley International (HRL) 27 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 42.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 77.5 / 100 |
| Social Vulnerability | 95.0 / 100 |
| Community Resilience | 3.7 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Hurricane | Relatively Moderate |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Very Low |
| Hail | Relatively 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 High |
| Landslide | Very Low |
| Coastal Flood | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
3 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.9.
| Apr 25, 2010 | 10 km WNW of Driscoll, Texas | M3.9 | 133 km | 5 km |
| Mar 24, 1997 | 4 km SSE of Alice, Texas | M3.8 | 141 km | 5 km |
| Jun 28, 2021 | 96 km E of South Padre Island, Texas | M2.7 | 133 km | 10 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Hurricane History
14 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 5.
| Year | Name | Category | Max Wind | Closest |
| 2024 | Beryl | Category 1 | 92 mph | 206 km |
| 2024 | Francine | Category 1 | 75 mph | 281 km |
| 2021 | Nicholas | Category 1 | 75 mph | 201 km |
| 2020 | Hanna | Category 1 | 92 mph | 16 km |
| 2017 | Harvey | Category 4 | 132 mph | 128 km |
| 2010 | Alex | Category 2 | 109 mph | 250 km |
| 2008 | Dolly | Category 2 | 98 mph | 19 km |
| 2005 | Emily | Category 3 | 127 mph | 197 km |
| 2003 | Claudette | Category 1 | 92 mph | 228 km |
| 2003 | Erika | Category 1 | 75 mph | 141 km |
| 1999 | Bret | Category 4 | 144 mph | 37 km |
| 1988 | Gilbert | Category 4 | 132 mph | 253 km |
| 1983 | Barry | Category 1 | 81 mph | 130 km |
| 1980 | Allen | Category 5 | 161 mph | 25 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Tornado History
135 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF3. Total: 1 fatality, 18 injuries.
| Date | Rating | Distance | Path | Fatalities |
| May 12, 1969 | EF3 | 55 km | 0.1 mi | 0 |
| May 12, 1969 | EF3 | 46 km | 0.1 mi | 0 |
| Jun 5, 1965 | EF3 | 79 km | 1.0 mi | 0 |
| Apr 19, 1965 | EF3 | 89 km | 1.5 mi | 0 |
| Aug 9, 1980 | EF2 | 68 km | 4.6 mi | 0 |
| May 24, 1970 | EF2 | 34 km | 25.5 mi | 0 |
| May 12, 1969 | EF2 | 77 km | 0.1 mi | 0 |
| Jun 1, 1962 | EF2 | 35 km | 1.0 mi | 0 |
| Jan 26, 1950 | EF2 | 76 km | 4.7 mi | 0 |
| May 13, 2023 | EF1 | 57 km | 0.5 mi | 1 |
| Oct 30, 2015 | EF1 | 32 km | 0.7 mi | 0 |
| Jun 30, 2011 | EF1 | 90 km | 0.4 mi | 0 |
| Jul 16, 2007 | EF1 | 89 km | 1.0 mi | 0 |
| May 21, 2001 | EF1 | 96 km | 0.1 mi | 0 |
| May 21, 2001 | EF1 | 96 km | 0.2 mi | 0 |
| Apr 4, 1997 | EF1 | 67 km | 0.5 mi | 0 |
| Jun 14, 1994 | EF1 | 96 km | 0.5 mi | 0 |
| Sep 16, 1988 | EF1 | 50 km | 0.5 mi | 0 |
| Aug 29, 1981 | EF1 | 99 km | 2.0 mi | 0 |
| Apr 21, 1977 | EF1 | 59 km | 0.1 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Wildfire History
20 wildfires (100+ acres) recorded within 100 km. Largest: BURNS RANCH FIRE (58,395 acres, 2008).
| Year | Name | Acres Burned | Distance |
| 2008 | BURNS RANCH FIRE | 58,395 | 80 km |
| 2020 | SHOOTING RANGE | 15,389 | 93 km |
| 2012 | 6 MILE | 12,272 | 91 km |
| 2024 | LAGUNA 24 | 12,147 | 92 km |
| 2022 | HAYFIELD SOUTH | 11,038 | 30 km |
| 2005 | DAISY | 10,556 | 89 km |
| 2021 | KING | 9,793 | 72 km |
| 2017 | CANE | 8,802 | 50 km |
| 2022 | VIB | 7,817 | 73 km |
| 2018 | TRUST | 6,648 | 57 km |
| 2022 | POLO | 5,571 | 40 km |
| 2009 | TURTLE | 5,457 | 60 km |
| 1986 | FIREWORKS | 4,733 | 90 km |
| 2018 | LIGHTNING14 | 4,241 | 78 km |
| 2008 | ENCINO | 3,979 | 76 km |
| 2023 | LAGUNA LARGA | 3,850 | 100 km |
| 2014 | 28 MILE | 3,719 | 59 km |
| 2009 | FLACA | 3,366 | 94 km |
| 2021 | BAFFIN | 3,223 | 58 km |
| 2011 | KING RANCH | 3,075 | 40 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 59°F (15°C) | 1.7 in | Coldest |
| February | 61°F (16°C) | 1.6 in | |
| March | 67°F (20°C) | 0.7 in | Driest |
| April | 73°F (23°C) | 1.5 in | |
| May | 78°F (26°C) | 3.0 in | |
| June | 82°F (28°C) | 3.0 in | |
| July | 84°F (29°C) | 1.5 in | Warmest |
| August | 83°F (29°C) | 2.2 in | |
| September | 80°F (27°C) | 5.7 in | Wettest |
| October | 75°F (24°C) | 2.6 in | |
| November | 67°F (19°C) | 1.9 in | |
| December | 60°F (16°C) | 1.5 in |
Port Mansfield has a seasonal temperature swing of 25°F / from 59°F in January to 84°F in July. Total annual precipitation is 26.8 inches, with September being the wettest month (5.7") and March the driest (0.7").