Weather & Climate in Lake Bryan, TX
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Lake Bryan enjoys a temperate climate with an average annual temperature of 69°F (21°C). Winters average 52°F in January while summers reach 85°F in July. Annual precipitation totals 41.8 inches. Air quality is rated Good with a median AQI of 39. 66% of days have good air quality. The city sits at an elevation of 356 feet.
Temperature
52°F Jan (11°C)
85°F Jul (30°C)
| Annual Average | 69.4°F |
| 29% above US avg | |
| January Average | 52°F (11°C) |
| July Average | 85°F (30°C) |
Geography
| Elevation | 356 ft (109 m) |
| Area | 7.6 sq mi (19.6 km²) |
| Population Density | 249/sq mi |
| Coordinates | 30.7143°N, 96.4693°W |
| Timezone | America/Chicago |
| County | Brazos County County |
| Nearest Airport | H H Coffield Regional (RCK) 31 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 39.0 |
| Rating | Good |
| Good Days % | 65.7% |
| Unhealthy Days | 1 |
Natural Hazard Risk
| Overall Risk | Relatively Moderate |
| Risk Score | 88.4 / 100 |
| Social Vulnerability | 59.9 / 100 |
| Community Resilience | 48.9 / 100 |
Hazard Breakdown
| Tornado | Relatively High |
| Hurricane | Relatively Moderate |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Relatively Moderate |
| Hail | Relatively Moderate |
| Strong Wind | Relatively High |
| Heat Wave | Relatively Moderate |
| Winter Weather | Relatively High |
| Lightning | Very High |
| Ice Storm | Relatively High |
| Drought | Relatively Moderate |
| Cold Wave | Relatively High |
| Landslide | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
6 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 | 145 km | 5 km |
| Sep 3, 2015 | 7 km NNE of Leander, Texas | M2.9 | 130 km | 5 km |
| Oct 20, 2017 | 5 km W of Flatonia, Texas | M2.9 | 133 km | 3 km |
| Jan 4, 1995 | 1 km NW of Hallettsville, Texas | M2.7 | 148 km | 5 km |
| Aug 24, 2021 | 3 km NNW of Hallettsville, Texas | M2.6 | 146 km | 5 km |
| Apr 2, 2024 | 4 km SSW of Round Top, Texas | M2.5 | 80 km | 17 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Hurricane History
12 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 3.
| Year | Name | Category | Max Wind | Closest |
| 2024 | Beryl | Category 1 | 92 mph | 164 km |
| 2021 | Nicholas | Category 1 | 75 mph | 225 km |
| 2020 | Laura | Category 3 | - | 295 km |
| 2017 | Harvey | Category 3 | 121 mph | 238 km |
| 2008 | Ike | Category 2 | 109 mph | 116 km |
| 2007 | Humberto | Category 1 | 92 mph | 241 km |
| 2005 | Rita | Category 3 | 115 mph | 228 km |
| 2003 | Claudette | Category 1 | 92 mph | 239 km |
| 1989 | Chantal | Category 1 | 81 mph | 234 km |
| 1989 | Jerry | Category 1 | 86 mph | 220 km |
| 1986 | Bonnie | Category 1 | 86 mph | 227 km |
| 1983 | Alicia | Category 3 | 115 mph | 146 km |
Source: NOAA IBTrACS (Category 1+, 1980-2026).
Tornado History
356 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 22 fatalities, 246 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Mar 10, 1973 | EF4 | 97 km | 23.3 mi | 6 |
| Apr 13, 2019 | EF3 | 29 km | 32.5 mi | 0 |
| Mar 10, 2000 | EF3 | 38 km | 21.0 mi | 0 |
| Apr 27, 1990 | EF3 | 99 km | 4.0 mi | 0 |
| Sep 22, 1965 | EF3 | 90 km | 0.8 mi | 0 |
| May 10, 1959 | EF3 | 14 km | 15.8 mi | 0 |
| Oct 14, 1957 | EF3 | 80 km | 1.0 mi | 0 |
| Apr 24, 1957 | EF3 | 99 km | 14.7 mi | 0 |
| Mar 20, 1957 | EF3 | 62 km | 16.9 mi | 0 |
| Mar 20, 1957 | EF3 | 60 km | 7.2 mi | 0 |
| Apr 5, 1956 | EF3 | 10 km | 5.2 mi | 0 |
| Apr 30, 1954 | EF3 | 99 km | 139.9 mi | 0 |
| Dec 2, 1953 | EF3 | 54 km | 3.3 mi | 0 |
| Jun 5, 1950 | EF3 | 60 km | 23.9 mi | 0 |
| Mar 21, 2022 | EF2 | 89 km | 19.1 mi | 1 |
| Apr 24, 2019 | EF2 | 16 km | 1.7 mi | 0 |
| Apr 13, 2019 | EF2 | 94 km | 6.0 mi | 0 |
| Feb 20, 2017 | EF2 | 87 km | 9.4 mi | 0 |
| Feb 20, 2017 | EF2 | 87 km | 4.2 mi | 0 |
| May 26, 2016 | EF2 | 61 km | 1.3 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 | 98 km |
| 2011 | RILEY ROAD | 18,999 | 81 km |
| 2019 | UNNAMED | 6,349 | 72 km |
| 2011 | DYER MILL | 5,170 | 70 km |
| 2013 | UNNAMED | 5,033 | 87 km |
| 2020 | C-38/39/40 | 4,708 | 85 km |
| 2011 | S839 CONCORD ROBBINS | 4,388 | 65 km |
| 2013 | UNNAMED | 4,218 | 74 km |
| 2017 | UNNAMED | 4,195 | 87 km |
| 2016 | UNNAMED | 4,014 | 85 km |
| 2022 | UNNAMED | 3,972 | 85 km |
| 2010 | RX BURN C 36 39 | 3,832 | 86 km |
| 2015 | HIDDEN PINES | 3,807 | 98 km |
| 2013 | UNNAMED | 3,489 | 71 km |
| 2010 | RX BURN C-61 WMA | 3,103 | 90 km |
| 2010 | RX BURN COMPARTMENT 22-23-24 | 3,012 | 75 km |
| 2011 | CRAB PRAIRIE | 2,933 | 62 km |
| 2016 | UNNAMED | 2,832 | 70 km |
| 2022 | SHNF COMPT 60/61/62 | 2,763 | 96 km |
| 2021 | C-8/9 | 2,722 | 70 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 52°F (11°C) | 3.4 in | Coldest |
| February | 55°F (13°C) | 2.9 in | |
| March | 62°F (17°C) | 3.4 in | |
| April | 69°F (20°C) | 2.9 in | |
| May | 76°F (25°C) | 4.6 in | |
| June | 83°F (28°C) | 4.0 in | |
| July | 85°F (30°C) | 2.0 in | Driest |
| August | 86°F (30°C) | 3.1 in | Warmest |
| September | 81°F (27°C) | 3.5 in | |
| October | 71°F (22°C) | 4.9 in | Wettest |
| November | 60°F (16°C) | 3.3 in | |
| December | 53°F (12°C) | 3.7 in |
Lake Bryan has a seasonal temperature swing of 34°F / from 52°F in January to 86°F in August. Total annual precipitation is 41.8 inches, with October being the wettest month (4.9") and July the driest (2.0").