All Countries
Weather & Climate in Bay City, TX
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Bay City enjoys a temperate climate with an average annual temperature of 69°F (20°C). Winters average 53°F in January while summers reach 82°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 49.1 inches (wetter than the 38-inch national average). Air quality is rated Good with a median AQI of 42. The city sits at an elevation of 50 feet.
Temperature
53°F Jan (12°C)
82°F Jul (28°C)
| Annual Average | 68.8°F |
| 27% above US avg | |
| January Average | 53°F (12°C) |
| July Average | 82°F (28°C) |
| Sunny Days | 330 days/yr |
Geography
| Elevation | 50 ft (15 m) |
| Area | 8.8 sq mi (22.8 km²) |
| Population Density | 1,922/sq mi |
| Coordinates | 28.9835°N, 95.9599°W |
| Timezone | America/Chicago |
| County | Matagorda County County |
| Nearest Airport | Bay City Regional (BBC) 6 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 42.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 80.3 / 100 |
| Social Vulnerability | 72.7 / 100 |
| Community Resilience | 55.9 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Relatively High |
| Earthquake | Very Low |
| Wildfire | Relatively Low |
| Flood | Relatively Low |
| Hail | Relatively Low |
| Strong Wind | Relatively Low |
| Heat Wave | Relatively Low |
| Winter Weather | Very Low |
| Lightning | Relatively Moderate |
| Ice Storm | Relatively Low |
| Drought | Relatively Moderate |
| Cold Wave | Relatively Low |
| Landslide | Very Low |
| Coastal Flood | Relatively Moderate |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
11 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.1.
| May 12, 2019 | 18 km N of Yorktown, Texas | M3.1 | 148 km | 5 km |
| Feb 19, 2015 | 3 km N of Hallettsville, Texas | M3.1 | 110 km | 5 km |
| Jan 1, 2024 | 18 km S of Gonzales, Texas | M3.0 | 149 km | 3 km |
| Mar 4, 2019 | 11 km SE of Cuero, Texas | M3.0 | 121 km | 5 km |
| Oct 20, 2017 | 5 km W of Flatonia, Texas | M2.9 | 140 km | 3 km |
| Jun 16, 2022 | 17 km E of Smiley, Texas | M2.8 | 149 km | 7 km |
| Jan 4, 1995 | 1 km NW of Hallettsville, Texas | M2.7 | 109 km | 5 km |
| Aug 24, 2021 | 3 km NNW of Hallettsville, Texas | M2.6 | 110 km | 5 km |
| Jul 6, 2022 | 17 km E of Smiley, Texas | M2.5 | 149 km | 7 km |
| Apr 29, 2021 | 17 km E of Smiley, Texas | M2.5 | 149 km | 8 km |
| Apr 2, 2024 | 4 km SSW of Round Top, Texas | M2.5 | 136 km | 17 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 | 32 km |
| 2021 | Nicholas | Category 1 | 75 mph | 33 km |
| 2020 | Laura | Category 4 | 150 mph | 269 km |
| 2020 | Delta | Category 3 | 121 mph | 232 km |
| 2020 | Hanna | Category 1 | 92 mph | 210 km |
| 2017 | Harvey | Category 4 | 132 mph | 132 km |
| 2008 | Ike | Category 2 | 109 mph | 127 km |
| 2007 | Humberto | Category 1 | 92 mph | 134 km |
| 2005 | Rita | Category 3 | 121 mph | 233 km |
| 2003 | Claudette | Category 1 | 92 mph | 77 km |
| 1999 | Bret | Category 4 | 138 mph | 267 km |
| 1989 | Chantal | Category 1 | 81 mph | 166 km |
| 1989 | Jerry | Category 1 | 86 mph | 94 km |
| 1986 | Bonnie | Category 1 | 86 mph | 184 km |
| 1985 | Juan | Category 1 | 86 mph | 290 km |
| 1983 | Alicia | Category 3 | 115 mph | 79 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Tornado History
475 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF3. Total: 9 fatalities, 266 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Jan 24, 2023 | EF3 | 97 km | 23.3 mi | 0 |
| Mar 8, 1976 | EF3 | 67 km | 12.7 mi | 0 |
| Dec 24, 1975 | EF3 | 53 km | 1.0 mi | 0 |
| Sep 13, 1974 | EF3 | 69 km | 3.6 mi | 0 |
| Apr 11, 1969 | EF3 | 36 km | 2.0 mi | 0 |
| Sep 20, 1967 | EF3 | 55 km | 0.1 mi | 0 |
| Sep 20, 1967 | EF3 | 40 km | 1.0 mi | 4 |
| Sep 20, 1967 | EF3 | 97 km | 19.9 mi | 0 |
| Sep 20, 1967 | EF3 | 97 km | 19.9 mi | 0 |
| Apr 18, 1966 | EF3 | 51 km | 2.0 mi | 0 |
| Mar 28, 1966 | EF3 | 63 km | 9.3 mi | 0 |
| Feb 9, 1966 | EF3 | 69 km | 2.0 mi | 0 |
| Apr 19, 1965 | EF3 | 52 km | 0.2 mi | 1 |
| Nov 22, 1961 | EF3 | 48 km | 2.0 mi | 0 |
| Dec 28, 2024 | EF2 | 72 km | 8.9 mi | 1 |
| Feb 14, 2017 | EF2 | 66 km | 0.7 mi | 0 |
| Oct 31, 2015 | EF2 | 92 km | 4.2 mi | 0 |
| Nov 17, 2003 | EF2 | 81 km | 1.0 mi | 0 |
| Nov 17, 2003 | EF2 | 78 km | 1.5 mi | 0 |
| Oct 18, 1998 | EF2 | 93 km | 1.0 mi | 1 |
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 | 93 km |
| 2017 | TXTMR FY17 RX WHARTON | 5,175 | 77 km |
| 2010 | WHARTON | 5,084 | 78 km |
| 2008 | COW TRAP 2008 | 4,335 | 42 km |
| 2017 | 2018 NORTH SARGENT WF | 3,959 | 38 km |
| 2009 | CHOCOLATE BAYOU UNIT | 3,790 | 76 km |
| 2020 | CHOCOLATE BAYOU | 3,623 | 76 km |
| 1997 | MOUND | 3,402 | 74 km |
| 2009 | ROAD PASTURE 2009 | 3,197 | 40 km |
| 2006 | UNNAMED | 3,162 | 93 km |
| 2011 | BAILEY | 3,136 | 99 km |
| 1992 | SMITH MARSH | 3,057 | 42 km |
| 2006 | CATTAILS | 3,046 | 41 km |
| 2007 | UNNAMED | 2,537 | 85 km |
| 2023 | TXBRR-FY23-RX-W | 2,511 | 70 km |
| 2017 | TXTMR FY17 RX BLUESTEM | 2,462 | 69 km |
| 2019 | TXTMR-FY19-RX-ALLIGATOR MARSH | 2,435 | 70 km |
| 2010 | 2010 G 6 | 2,423 | 90 km |
| 2020 | BLUESTEM 1 | 2,417 | 69 km |
| 2022 | HOT BLUE STEM | 2,398 | 69 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 53°F (12°C) | 3.5 in | Coldest |
| February | 57°F (14°C) | 2.8 in | |
| March | 63°F (17°C) | 2.4 in | Driest |
| April | 69°F (21°C) | 2.7 in | |
| May | 76°F (24°C) | 4.7 in | |
| June | 81°F (27°C) | 4.8 in | |
| July | 82°F (28°C) | 4.3 in | |
| August | 83°F (28°C) | 3.8 in | Warmest |
| September | 80°F (26°C) | 6.5 in | Wettest |
| October | 72°F (22°C) | 4.2 in | |
| November | 63°F (17°C) | 3.9 in | |
| December | 56°F (14°C) | 3.1 in |
Bay City has a seasonal temperature swing of 30°F / from 53°F in January to 83°F in August. Total annual precipitation is 46.6 inches, with September being the wettest month (6.5") and March the driest (2.4").