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Weather & Climate in South Mountain, TX
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
South Mountain enjoys a temperate climate with an average annual temperature of 67°F (19°C). Winters average 48°F in January while summers reach 84°F in July. The area gets 303 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 37.0 inches. Air quality is rated Good with a median AQI of 42. The city sits at an elevation of 1,036 feet.
Temperature
48°F Jan (9°C)
84°F Jul (29°C)
| Annual Average | 66.5°F |
| 23% above US avg | |
| January Average | 48°F (9°C) |
| July Average | 84°F (29°C) |
| Sunny Days | 303 days/yr |
Geography
| Elevation | 1,036 ft (316 m) |
| Area | 1.6 sq mi (4.2 km²) |
| Population Density | 183/sq mi |
| Coordinates | 31.4398°N, 97.6793°W |
| Timezone | America/Chicago |
| County | Coryell County County |
| Nearest Airport | Draughon-Miller Central Texas Regional (TPL) 26 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 42.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 63.4 / 100 |
| Social Vulnerability | 38.6 / 100 |
| Community Resilience | 14.4 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Hurricane | Relatively Low |
| Earthquake | Very Low |
| Wildfire | Relatively Low |
| Flood | Relatively Low |
| Hail | Relatively Moderate |
| Strong Wind | Relatively Low |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Moderate |
| Lightning | Relatively High |
| Ice Storm | Relatively Low |
| Drought | Relatively Low |
| Cold Wave | Relatively Moderate |
| Landslide | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
31 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.0.
| May 7, 2015 | 5 km N of Venus, Texas | M4.0 | 128 km | 3 km |
| Jun 24, 2012 | 3 km SSE of Briaroaks, Texas | M3.5 | 121 km | 5 km |
| May 19, 2018 | 8 km NW of Venus, Texas | M3.4 | 126 km | 5 km |
| Jan 18, 2012 | 9 km SSE of Godley, Texas | M3.3 | 105 km | 5 km |
| Jun 15, 2012 | 5 km SSE of Briaroaks, Texas | M3.3 | 120 km | 5 km |
| May 1, 2024 | 7 km S of Mansfield, Texas | M3.2 | 128 km | 6 km |
| May 1, 2024 | 7 km SSW of Mansfield, Texas | M3.1 | 127 km | 4 km |
| Jul 17, 2011 | 2 km ESE of Venus, Texas | M3.0 | 123 km | 5 km |
| Dec 5, 2009 | 7 km S of Midlothian, Texas | M2.9 | 126 km | 5 km |
| Sep 3, 2015 | 7 km NNE of Leander, Texas | M2.9 | 89 km | 5 km |
| Jul 10, 2012 | 6 km NNE of Keene, Texas | M2.8 | 118 km | 5 km |
| Jun 2, 2009 | 1 km WNW of Cleburne, Texas | M2.8 | 105 km | 5 km |
| Jul 6, 2012 | 5 km NE of Keene, Texas | M2.7 | 117 km | 5 km |
| Oct 17, 2012 | 6 km WSW of Cedar Hill, Texas | M2.7 | 139 km | 6 km |
| Jul 13, 2012 | 1 km WSW of Briaroaks, Texas | M2.7 | 123 km | 5 km |
| Feb 4, 2016 | 7 km SSW of Mansfield, Texas | M2.7 | 128 km | 9 km |
| Jun 12, 2011 | 4 km NNW of Plum Grove, Texas | M2.7 | 109 km | 5 km |
| Feb 24, 2013 | 6 km SSW of Oak Leaf, Texas | M2.7 | 137 km | 5 km |
| Mar 10, 2013 | 6 km NNE of Godley, Texas | M2.7 | 119 km | 4 km |
| Mar 17, 2013 | 3 km S of Oak Leaf, Texas | M2.6 | 141 km | 2 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Hurricane History
3 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 2.
| Year | Name | Category | Max Wind | Closest |
| 2024 | Beryl | Category 1 | 81 mph | 287 km |
| 2008 | Ike | Category 2 | 109 mph | 232 km |
| 1983 | Alicia | Category 3 | 115 mph | 285 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Tornado History
474 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF5. Total: 163 fatalities, 1,014 injuries.
| Date | Rating | Distance | Path | Fatalities |
| May 27, 1997 | EF5 | 69 km | 5.1 mi | 27 |
| May 6, 1973 | EF5 | 28 km | 10.6 mi | 0 |
| May 11, 1953 | EF5 | 52 km | 20.9 mi | 114 |
| May 26, 1976 | EF4 | 100 km | 18.8 mi | 0 |
| Mar 10, 1973 | EF4 | 81 km | 23.3 mi | 6 |
| Mar 31, 1959 | EF4 | 63 km | 10.4 mi | 6 |
| Apr 21, 1952 | EF4 | 23 km | 2.3 mi | 0 |
| Apr 12, 2022 | EF3 | 63 km | 16.6 mi | 0 |
| May 15, 2013 | EF3 | 92 km | 7.8 mi | 0 |
| May 12, 2000 | EF3 | 59 km | 7.0 mi | 2 |
| May 27, 1997 | EF3 | 36 km | 1.4 mi | 0 |
| May 27, 1997 | EF3 | 100 km | 9.2 mi | 0 |
| May 27, 1997 | EF3 | 36 km | 3.7 mi | 0 |
| Mar 14, 1990 | EF3 | 45 km | 9.0 mi | 0 |
| May 17, 1989 | EF3 | 75 km | 3.0 mi | 1 |
| May 9, 1981 | EF3 | 86 km | 5.2 mi | 0 |
| May 11, 1978 | EF3 | 81 km | 7.2 mi | 0 |
| May 26, 1976 | EF3 | 37 km | 2.0 mi | 2 |
| May 25, 1976 | EF3 | 81 km | 0.1 mi | 0 |
| Mar 10, 1973 | EF3 | 95 km | 7.8 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Wildfire History
20 wildfires (100+ acres) recorded within 100 km. Largest: CRITTENBERG COMPLEX (21,391 acres, 2022).
| Year | Name | Acres Burned | Distance |
| 2022 | CRITTENBERG COMPLEX | 21,391 | 19 km |
| 2022 | CHALK MOUNTAIN | 6,461 | 89 km |
| 2011 | ROBINETTE | 6,039 | 23 km |
| 2011 | UNNAMED | 5,706 | 23 km |
| 2011 | BIG TRICKLE RANCH FIRE | 3,623 | 77 km |
| 2011 | C#491 | 3,616 | 94 km |
| 2022 | 3 OAKS | 3,294 | 62 km |
| 2018 | HARMAN ROAD | 3,094 | 30 km |
| 2009 | OWL CREEK | 2,376 | 17 km |
| 2011 | UNNAMED | 2,236 | 27 km |
| 2006 | BROWNS CREEK RANGE | 1,889 | 17 km |
| 2008 | LAMKIN | 1,847 | 72 km |
| 2011 | UNNAMED | 1,581 | 29 km |
| 2011 | CORYELL COMPLEX | 1,572 | 40 km |
| 2008 | BERTRAM | 1,567 | 79 km |
| 2008 | HWY 195 FIRE | 1,523 | 72 km |
| 2006 | MONAHAM FIRE | 1,484 | 79 km |
| 2008 | CR 208 | 1,483 | 68 km |
| 2011 | CENTER CITY | 1,476 | 68 km |
| 2018 | FM 2005 | 1,465 | 68 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 48°F (9°C) | 1.8 in | Coldest, Driest |
| February | 50°F (10°C) | 2.3 in | |
| March | 58°F (14°C) | 2.3 in | |
| April | 65°F (18°C) | 3.0 in | |
| May | 73°F (23°C) | 4.3 in | Wettest |
| June | 79°F (26°C) | 3.6 in | |
| July | 84°F (29°C) | 1.9 in | Warmest |
| August | 83°F (28°C) | 2.2 in | |
| September | 77°F (25°C) | 3.4 in | |
| October | 67°F (20°C) | 3.0 in | |
| November | 56°F (13°C) | 2.3 in | |
| December | 48°F (9°C) | 1.8 in |
South Mountain has a seasonal temperature swing of 36°F / from 48°F in January to 84°F in July. Total annual precipitation is 31.9 inches, with May being the wettest month (4.3") and January the driest (1.8").