All Countries
Weather & Climate in Dorchester, TX
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Dorchester enjoys a temperate climate with an average annual temperature of 64°F (18°C). Winters average 43°F in January while summers reach 83°F in July. The area gets 308 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 44.3 inches. Air quality is rated Good with a median AQI of 42. The city sits at an elevation of 870 feet.
Temperature
43°F Jan (6°C)
83°F Jul (28°C)
| Annual Average | 63.6°F |
| 18% above US avg | |
| January Average | 43°F (6°C) |
| July Average | 83°F (28°C) |
| Sunny Days | 308 days/yr |
Geography
| Elevation | 870 ft (265 m) |
| Area | 1.3 sq mi (3.4 km²) |
| Population Density | 33/sq mi |
| Coordinates | 33.5313°N, 96.6891°W |
| Timezone | America/Chicago |
| County | Grayson County County |
| Nearest Airport | North Texas Regional/Perrin Field (PNX) 13 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 | 38.7 / 100 |
| Community Resilience | 44.2 / 100 |
Hazard Breakdown
| Tornado | Relatively High |
| Hurricane | Very Low |
| Earthquake | Relatively Low |
| Wildfire | Relatively Low |
| Flood | Relatively Moderate |
| Hail | Relatively Moderate |
| Strong Wind | Relatively Moderate |
| Heat Wave | Relatively Moderate |
| Winter Weather | Relatively Low |
| Lightning | Relatively Low |
| Ice Storm | Relatively High |
| Drought | Relatively Low |
| Cold Wave | Relatively Moderate |
| Landslide | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
218 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.5.
| Sep 6, 1997 | 6 km N of Tupelo, Oklahoma | M4.5 | 128 km | 5 km |
| Apr 3, 2012 | 8 km SSW of Pittsburg, Oklahoma | M4.1 | 144 km | 5 km |
| May 7, 2015 | 5 km N of Venus, Texas | M4.0 | 123 km | 3 km |
| Dec 9, 2013 | 8 km S of Perrin, Texas | M3.7 | 143 km | 5 km |
| Nov 28, 2013 | 6 km SSW of Perrin, Texas | M3.7 | 144 km | 5 km |
| Sep 25, 2023 | 9 km WNW of Velma, Oklahoma | M3.7 | 145 km | 20 km |
| Nov 20, 2013 | 1 km NNW of Azle, Texas | M3.6 | 106 km | 5 km |
| Jan 7, 2015 | 6 km NE of Irving, Texas | M3.6 | 78 km | 5 km |
| Dec 8, 2013 | 0 km NNE of Sanctuary, Texas | M3.6 | 108 km | 5 km |
| Jan 6, 2015 | 4 km ENE of Irving, Texas | M3.5 | 80 km | 6 km |
| Jun 8, 2004 | 6 km N of Lone Grove, Oklahoma | M3.5 | 94 km | 5 km |
| Mar 4, 2013 | 5 km S of Tishomingo, Oklahoma | M3.5 | 73 km | 5 km |
| Apr 28, 2013 | 4 km NNW of Oakland, Oklahoma | M3.5 | 68 km | 5 km |
| Jun 24, 2012 | 3 km SSE of Briaroaks, Texas | M3.5 | 130 km | 5 km |
| Aug 7, 2024 | 9 km N of Stonewall, Oklahoma | M3.4 | 135 km | 27 km |
| Sep 23, 2013 | 4 km WNW of Marietta, Oklahoma | M3.4 | 64 km | 5 km |
| Nov 25, 2013 | 3 km WNW of Sanctuary, Texas | M3.4 | 110 km | 5 km |
| Oct 20, 2002 | 8 km WSW of Lane, Oklahoma | M3.4 | 100 km | 5 km |
| May 31, 1997 | 3 km ESE of Neylandville, Texas | M3.4 | 78 km | 5 km |
| Sep 30, 2012 | 4 km NW of Irving, Texas | M3.4 | 81 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Tornado History
742 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 82 fatalities, 1,732 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Apr 27, 2024 | EF4 | 60 km | 26.8 mi | 1 |
| Nov 4, 2022 | EF4 | 87 km | 44.7 mi | 0 |
| Dec 26, 2015 | EF4 | 82 km | 13.0 mi | 10 |
| Feb 10, 2009 | EF4 | 97 km | 37.0 mi | 8 |
| Apr 2, 1982 | EF4 | 99 km | 23.0 mi | 10 |
| May 13, 1981 | EF4 | 95 km | 8.8 mi | 0 |
| Apr 27, 1966 | EF4 | 89 km | 10.2 mi | 0 |
| Apr 2, 1957 | EF4 | 52 km | 5.2 mi | 2 |
| Apr 2, 1957 | EF4 | 50 km | 7.9 mi | 3 |
| May 25, 2024 | EF3 | 98 km | 47.3 mi | 7 |
| May 25, 2024 | EF3 | 21 km | 0.7 mi | 0 |
| Oct 20, 2019 | EF3 | 77 km | 15.8 mi | 0 |
| Apr 30, 2019 | EF3 | 66 km | 27.6 mi | 2 |
| May 9, 2016 | EF3 | 96 km | 9.1 mi | 1 |
| May 9, 2016 | EF3 | 81 km | 13.8 mi | 0 |
| May 25, 2015 | EF3 | 64 km | 18.8 mi | 1 |
| Apr 3, 2012 | EF3 | 89 km | 7.7 mi | 0 |
| Apr 14, 2011 | EF3 | 94 km | 17.0 mi | 2 |
| May 10, 2010 | EF3 | 98 km | 4.9 mi | 0 |
| May 9, 2006 | EF3 | 24 km | 9.3 mi | 3 |
Source: NOAA Storm Prediction Center (EF0+, 1950-2024, US only).
Wildfire History
20 wildfires (100+ acres) recorded within 100 km. Largest: BRUSHY MOUNTAIN (18,412 acres, 2009).
| Year | Name | Acres Burned | Distance |
| 2009 | BRUSHY MOUNTAIN | 18,412 | 82 km |
| 2009 | MONTAGUE COUNTY COMPLEX | 6,505 | 83 km |
| 2005 | CALLISBURG | 5,797 | 43 km |
| 1996 | UNNAMED | 5,370 | 90 km |
| 2005 | ACHILLE | 4,958 | 47 km |
| 2005 | MILL CREEK | 4,277 | 94 km |
| 1990 | RK PRAIRIE | 3,974 | 94 km |
| 2011 | ARBUCKLE COMPLEX | 3,942 | 100 km |
| 2013 | ROCKY POINT | 3,165 | 50 km |
| 2008 | MCMILLEN | 3,083 | 84 km |
| 2005 | UNNAMED | 2,677 | 83 km |
| 1996 | LAKEMURRAY | 2,452 | 73 km |
| 2022 | UNNAMED | 2,362 | 84 km |
| 2011 | DEADMAN SPRINGS | 2,307 | 92 km |
| 2005 | UNNAMED | 2,202 | 97 km |
| 1991 | UNNAMED | 2,115 | 79 km |
| 2009 | HARRIS | 1,875 | 90 km |
| 2010 | LBJ RX UNITS 14-15-16-26-76 | 1,848 | 90 km |
| 2022 | UNNAMED | 1,827 | 90 km |
| 2006 | UNNAMED | 1,634 | 90 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 43°F (6°C) | 1.8 in | Coldest, Driest |
| February | 46°F (8°C) | 2.6 in | |
| March | 54°F (12°C) | 3.4 in | |
| April | 63°F (17°C) | 3.7 in | |
| May | 71°F (22°C) | 5.7 in | Wettest |
| June | 79°F (26°C) | 4.3 in | |
| July | 83°F (28°C) | 2.3 in | Warmest |
| August | 83°F (28°C) | 2.3 in | |
| September | 76°F (24°C) | 4.8 in | |
| October | 65°F (18°C) | 4.0 in | |
| November | 53°F (12°C) | 2.9 in | |
| December | 45°F (7°C) | 2.2 in |
Dorchester has a seasonal temperature swing of 40°F / from 43°F in January to 83°F in July. Total annual precipitation is 40.0 inches, with May being the wettest month (5.7") and January the driest (1.8").