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Weather & Climate in Somerville, TX
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Somerville enjoys a temperate climate with an average annual temperature of 67°F (19°C). Winters average 49°F in January while summers reach 84°F in July. The area gets 301 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 41.0 inches. Air quality is rated Good with a median AQI of 42. The city sits at an elevation of 249 feet.
Temperature
49°F Jan (9°C)
84°F Jul (29°C)
| Annual Average | 67.0°F |
| 24% above US avg | |
| January Average | 49°F (9°C) |
| July Average | 84°F (29°C) |
| Sunny Days | 301 days/yr |
Geography
| Elevation | 249 ft (76 m) |
| Area | 3.0 sq mi (7.7 km²) |
| Population Density | 468/sq mi |
| Coordinates | 30.3454°N, 96.5309°W |
| Timezone | America/Chicago |
| County | Washington County County |
| Nearest Airport | H H Coffield Regional (RCK) 34 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 42.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 72.0 / 100 |
| Social Vulnerability | 86.3 / 100 |
| Community Resilience | 58.8 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Hurricane | Relatively Moderate |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Relatively Low |
| Hail | Relatively Low |
| Strong Wind | Relatively Moderate |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Low |
| Lightning | Relatively Moderate |
| Ice Storm | Relatively Low |
| Drought | Relatively Moderate |
| Cold Wave | Relatively Moderate |
| Landslide | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
10 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.1.
| Feb 19, 2015 | 3 km N of Hallettsville, Texas | M3.1 | 105 km | 5 km |
| Jan 1, 2024 | 18 km S of Gonzales, Texas | M3.0 | 143 km | 3 km |
| Sep 3, 2015 | 7 km NNE of Leander, Texas | M2.9 | 129 km | 5 km |
| Oct 20, 2017 | 5 km W of Flatonia, Texas | M2.9 | 96 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 | 108 km | 5 km |
| Jul 22, 2023 | 13 km ENE of Smiley, Texas | M2.6 | 150 km | 7 km |
| Aug 24, 2021 | 3 km NNW of Hallettsville, Texas | M2.6 | 105 km | 5 km |
| Jul 6, 2022 | 17 km E of Smiley, Texas | M2.5 | 148 km | 7 km |
| Apr 2, 2024 | 4 km SSW of Round Top, Texas | M2.5 | 40 km | 17 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Hurricane History
11 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 | 127 km |
| 2021 | Nicholas | Category 1 | 75 mph | 190 km |
| 2017 | Harvey | Category 4 | 132 mph | 198 km |
| 2008 | Ike | Category 2 | 109 mph | 128 km |
| 2007 | Humberto | Category 1 | 92 mph | 226 km |
| 2005 | Rita | Category 3 | 115 mph | 234 km |
| 2003 | Claudette | Category 1 | 92 mph | 197 km |
| 1989 | Chantal | Category 1 | 81 mph | 221 km |
| 1989 | Jerry | Category 1 | 86 mph | 195 km |
| 1986 | Bonnie | Category 1 | 86 mph | 220 km |
| 1983 | Alicia | Category 3 | 115 mph | 123 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Tornado History
409 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF3. Total: 16 fatalities, 151 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Apr 13, 2019 | EF3 | 62 km | 32.5 mi | 0 |
| Mar 10, 2000 | EF3 | 17 km | 21.0 mi | 0 |
| Sep 20, 1967 | EF3 | 65 km | 19.9 mi | 0 |
| Sep 20, 1967 | EF3 | 65 km | 19.9 mi | 0 |
| Sep 22, 1965 | EF3 | 78 km | 0.8 mi | 0 |
| May 10, 1959 | EF3 | 48 km | 15.8 mi | 0 |
| Oct 14, 1957 | EF3 | 57 km | 1.0 mi | 0 |
| Apr 24, 1957 | EF3 | 81 km | 14.7 mi | 0 |
| Mar 20, 1957 | EF3 | 37 km | 16.9 mi | 0 |
| Mar 20, 1957 | EF3 | 30 km | 7.2 mi | 0 |
| Apr 5, 1956 | EF3 | 40 km | 5.2 mi | 0 |
| Apr 30, 1954 | EF3 | 89 km | 139.9 mi | 0 |
| Dec 2, 1953 | EF3 | 46 km | 3.3 mi | 0 |
| Apr 28, 1953 | EF3 | 73 km | 0.5 mi | 0 |
| Jun 5, 1950 | EF3 | 22 km | 23.9 mi | 0 |
| Mar 21, 2022 | EF2 | 91 km | 12.0 mi | 0 |
| May 3, 2019 | EF2 | 64 km | 2.4 mi | 0 |
| Apr 24, 2019 | EF2 | 44 km | 1.7 mi | 0 |
| Feb 20, 2017 | EF2 | 82 km | 4.2 mi | 0 |
| Feb 20, 2017 | EF2 | 83 km | 9.4 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Wildfire History
20 wildfires (100+ acres) recorded within 100 km. Largest: BASTROP COUNTY COMPLEX (31,838 acres, 2011).
| Year | Name | Acres Burned | Distance |
| 2011 | BASTROP COUNTY COMPLEX | 31,838 | 72 km |
| 2011 | RILEY ROAD | 18,999 | 69 km |
| 2019 | UNNAMED | 6,349 | 76 km |
| 2011 | DYER MILL | 5,170 | 60 km |
| 2013 | UNNAMED | 5,033 | 93 km |
| 2020 | C-38/39/40 | 4,708 | 89 km |
| 2013 | UNNAMED | 4,218 | 82 km |
| 2017 | UNNAMED | 4,195 | 94 km |
| 2016 | UNNAMED | 4,014 | 88 km |
| 2022 | UNNAMED | 3,972 | 89 km |
| 2010 | RX BURN C 36 39 | 3,832 | 89 km |
| 2015 | HIDDEN PINES | 3,807 | 69 km |
| 2013 | UNNAMED | 3,489 | 75 km |
| 2011 | BAILEY | 3,136 | 66 km |
| 2010 | RX BURN C-61 WMA | 3,103 | 95 km |
| 2010 | RX BURN COMPARTMENT 22-23-24 | 3,012 | 84 km |
| 2011 | CRAB PRAIRIE | 2,933 | 80 km |
| 2016 | UNNAMED | 2,832 | 79 km |
| 2021 | C-8/9 | 2,722 | 74 km |
| 2019 | COMPARTMENT 8 | 2,712 | 87 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 49°F (9°C) | 3.0 in | Coldest |
| February | 53°F (12°C) | 2.8 in | |
| March | 60°F (16°C) | 2.7 in | |
| April | 67°F (20°C) | 3.4 in | |
| May | 74°F (24°C) | 5.0 in | Wettest |
| June | 81°F (27°C) | 3.9 in | |
| July | 84°F (29°C) | 1.9 in | Driest |
| August | 84°F (29°C) | 2.3 in | Warmest |
| September | 79°F (26°C) | 4.7 in | |
| October | 69°F (21°C) | 3.8 in | |
| November | 59°F (15°C) | 3.2 in | |
| December | 52°F (11°C) | 2.9 in |
Somerville has a seasonal temperature swing of 36°F / from 49°F in January to 84°F in August. Total annual precipitation is 39.6 inches, with May being the wettest month (5.0") and July the driest (1.9").