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Weather & Climate in Grey Forest, TX
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Grey Forest enjoys a temperate climate with an average annual temperature of 67°F (19°C). Winters average 49°F in January while summers reach 82°F in July. The area gets 300 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 37.5 inches. Air quality is rated Good with a median AQI of 42. The city sits at an elevation of 1,129 feet.
Temperature
49°F Jan (9°C)
82°F Jul (28°C)
| Annual Average | 66.5°F |
| 23% above US avg | |
| January Average | 49°F (9°C) |
| July Average | 82°F (28°C) |
| Sunny Days | 300 days/yr |
Geography
| Elevation | 1,129 ft (344 m) |
| Area | 0.7 sq mi (1.9 km²) |
| Population Density | 927/sq mi |
| Coordinates | 29.6157°N, 98.6833°W |
| Timezone | America/Chicago |
| County | Bexar County County |
| Nearest Airport | San Antonio International (SAT) 14 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 42.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively High |
| Risk Score | 99.4 / 100 |
| Social Vulnerability | 57.2 / 100 |
| Community Resilience | 21.7 / 100 |
Hazard Breakdown
| Tornado | Very High |
| Hurricane | Relatively Moderate |
| Earthquake | Relatively Low |
| Wildfire | Relatively Moderate |
| Flood | Very High |
| Hail | Very High |
| Strong Wind | Relatively High |
| Heat Wave | Relatively High |
| Winter Weather | Relatively High |
| Lightning | Relatively High |
| Ice Storm | Relatively Moderate |
| Drought | Relatively Moderate |
| Cold Wave | Relatively High |
| Landslide | Relatively Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
223 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.8.
| Oct 20, 2011 | 14 km SSW of Falls City, Texas | M4.8 | 102 km | 5 km |
| Jan 30, 2025 | 18 km ENE of Falls City, Texas | M4.6 | 102 km | 7 km |
| Feb 17, 2024 | 3 km SSW of Falls City, Texas | M4.5 | 98 km | 7 km |
| Feb 17, 2024 | 3 km S of Falls City, Texas | M4.3 | 98 km | 8 km |
| Sep 14, 2023 | 16 km ENE of Falls City, Texas | M4.1 | 101 km | 8 km |
| Apr 9, 1993 | 21 km NW of Pawnee, Texas | M4.1 | 105 km | 5 km |
| May 1, 2018 | 4 km SSE of Falls City, Texas | M4.0 | 100 km | 5 km |
| Feb 22, 2024 | 3 km E of Falls City, Texas | M3.9 | 98 km | 8 km |
| Apr 7, 2008 | 7 km SSW of Falls City, Texas | M3.9 | 100 km | 5 km |
| Feb 17, 2024 | 3 km S of Falls City, Texas | M3.9 | 98 km | 8 km |
| Jul 19, 2023 | 19 km E of Pleasanton, Texas | M3.8 | 82 km | 9 km |
| Feb 12, 2024 | 3 km S of Falls City, Texas | M3.7 | 98 km | 7 km |
| Feb 17, 2024 | 2 km S of Falls City, Texas | M3.7 | 98 km | 8 km |
| Jan 6, 2018 | 17 km SW of Falls City, Texas | M3.6 | 101 km | 5 km |
| Jul 20, 1991 | 8 km SSW of Falls City, Texas | M3.6 | 100 km | 10 km |
| Jun 16, 2019 | 5 km SE of Falls City, Texas | M3.6 | 101 km | 5 km |
| May 2, 2024 | 2 km E of Falls City, Texas | M3.5 | 98 km | 7 km |
| Feb 23, 2024 | 2 km ESE of Falls City, Texas | M3.5 | 98 km | 8 km |
| Jan 31, 2025 | 19 km ENE of Falls City, Texas | M3.5 | 102 km | 7 km |
| Feb 19, 2024 | 0 km ENE of Falls City, Texas | M3.4 | 96 km | 6 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Hurricane History
5 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 | 262 km |
| 2017 | Harvey | Category 4 | 132 mph | 169 km |
| 2003 | Claudette | Category 1 | 92 mph | 207 km |
| 1999 | Bret | Category 1 | 92 mph | 286 km |
| 1980 | Allen | Category 1 | 81 mph | 245 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Tornado History
295 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 7 fatalities, 170 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Apr 28, 1953 | EF4 | 5 km | 1.0 mi | 2 |
| Oct 12, 2001 | EF3 | 71 km | 2.5 mi | 0 |
| May 11, 1999 | EF3 | 91 km | 3.5 mi | 0 |
| Apr 29, 1975 | EF3 | 78 km | 8.3 mi | 3 |
| May 6, 1969 | EF3 | 55 km | 38.9 mi | 0 |
| Sep 20, 1967 | EF3 | 55 km | 5.0 mi | 0 |
| Nov 22, 1961 | EF3 | 30 km | 1.0 mi | 0 |
| Dec 1, 1953 | EF3 | 74 km | 5.1 mi | 0 |
| Apr 28, 1953 | EF3 | 17 km | 4.9 mi | 1 |
| Mar 21, 2022 | EF2 | 87 km | 7.9 mi | 0 |
| Feb 19, 2017 | EF2 | 23 km | 4.6 mi | 0 |
| Oct 30, 2015 | EF2 | 68 km | 8.3 mi | 0 |
| Oct 30, 2015 | EF2 | 75 km | 5.3 mi | 0 |
| Mar 19, 2012 | EF2 | 58 km | 3.5 mi | 0 |
| Mar 19, 2012 | EF2 | 42 km | 5.0 mi | 0 |
| Jul 21, 2007 | EF2 | 72 km | 2.0 mi | 0 |
| Apr 7, 2002 | EF2 | 73 km | 1.0 mi | 0 |
| Mar 19, 2002 | EF2 | 41 km | 1.5 mi | 0 |
| Oct 12, 2001 | EF2 | 55 km | 1.2 mi | 0 |
| Sep 15, 1996 | EF2 | 82 km | 4.0 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Wildfire History
13 wildfires (100+ acres) recorded within 100 km. Largest: STEWAIT (3,696 acres, 1984).
| Year | Name | Acres Burned | Distance |
| 1984 | STEWAIT | 3,696 | 88 km |
| 2022 | TRAINING AREA 23 | 2,696 | 16 km |
| 2011 | UNNAMED | 2,654 | 96 km |
| 2011 | DOSS | 1,860 | 93 km |
| 2008 | KERR COUNTY COMPLEX | 1,775 | 99 km |
| 2022 | BUDDY | 1,521 | 81 km |
| 2022 | BIG SKY | 1,403 | 89 km |
| 2007 | WILLOW CITY | 1,235 | 88 km |
| 2022 | SMOKE RIDER | 1,233 | 75 km |
| 2006 | CVFD NUMBER 70 | 1,177 | 71 km |
| 2008 | SANDY 2-148 | 1,144 | 88 km |
| 2022 | DAS GOAT | 1,135 | 26 km |
| 2006 | PURGATORY | 1,004 | 66 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 49°F (9°C) | 1.7 in | Coldest, Driest |
| February | 53°F (12°C) | 2.0 in | |
| March | 60°F (16°C) | 1.9 in | |
| April | 67°F (19°C) | 2.6 in | |
| May | 74°F (23°C) | 4.3 in | Wettest |
| June | 79°F (26°C) | 3.9 in | |
| July | 82°F (28°C) | 2.1 in | Warmest |
| August | 82°F (28°C) | 2.8 in | |
| September | 77°F (25°C) | 3.4 in | |
| October | 69°F (20°C) | 3.5 in | |
| November | 58°F (15°C) | 2.3 in | |
| December | 51°F (11°C) | 1.8 in |
Grey Forest has a seasonal temperature swing of 33°F / from 49°F in January to 82°F in July. Total annual precipitation is 32.1 inches, with May being the wettest month (4.3") and January the driest (1.7").