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Weather & Climate in St. Jo, TX
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
St. Jo enjoys a temperate climate with an average annual temperature of 64°F (18°C). Winters average 42°F in January while summers reach 84°F in July. The area gets 330 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 35.4 inches. Air quality is rated Good with a median AQI of 42. The city sits at an elevation of 1,142 feet.
Temperature
42°F Jan (6°C)
84°F Jul (29°C)
| Annual Average | 63.7°F |
| 18% above US avg | |
| January Average | 42°F (6°C) |
| July Average | 84°F (29°C) |
| Sunny Days | 330 days/yr |
Geography
| Elevation | 1,142 ft (348 m) |
| Area | 1.1 sq mi (2.8 km²) |
| Population Density | 811/sq mi |
| Coordinates | 33.6950°N, 97.5231°W |
| Timezone | America/Chicago |
| County | Montague County County |
| Nearest Airport | North Texas Regional/Perrin Field (PNX) 49 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 42.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 54.9 / 100 |
| Social Vulnerability | 57.5 / 100 |
| Community Resilience | 23.5 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Hurricane | Very Low |
| Earthquake | Very Low |
| Wildfire | Relatively Moderate |
| Flood | Very Low |
| Hail | Relatively Low |
| Strong Wind | Relatively Moderate |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Low |
| Lightning | Very Low |
| Ice Storm | Relatively High |
| Drought | Relatively High |
| Cold Wave | Relatively Low |
| Landslide | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
261 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 | 147 km | 5 km |
| Jan 18, 1995 | 4 km SSE of Erin Springs, Oklahoma | M4.2 | 120 km | 5 km |
| May 7, 2015 | 5 km N of Venus, Texas | M4.0 | 141 km | 3 km |
| Apr 28, 1998 | 9 km NE of Medicine Park, Oklahoma | M3.9 | 146 km | 5 km |
| Nov 15, 1990 | 5 km SSE of Erin Springs, Oklahoma | M3.9 | 119 km | 5 km |
| Feb 8, 2002 | 8 km SW of Elgin, Oklahoma | M3.8 | 138 km | 5 km |
| Nov 28, 2013 | 6 km SSW of Perrin, Texas | M3.7 | 96 km | 5 km |
| Dec 9, 2013 | 8 km S of Perrin, Texas | M3.7 | 96 km | 5 km |
| Sep 25, 2023 | 9 km WNW of Velma, Oklahoma | M3.7 | 90 km | 20 km |
| Jan 7, 2015 | 6 km NE of Irving, Texas | M3.6 | 111 km | 5 km |
| Dec 17, 1992 | 7 km SSE of Erin Springs, Oklahoma | M3.6 | 117 km | 5 km |
| Nov 20, 2013 | 1 km NNW of Azle, Texas | M3.6 | 87 km | 5 km |
| Dec 8, 2013 | 0 km NNE of Sanctuary, Texas | M3.6 | 87 km | 5 km |
| Apr 28, 2013 | 4 km NNW of Oakland, Oklahoma | M3.5 | 82 km | 5 km |
| Jun 24, 2012 | 3 km SSE of Briaroaks, Texas | M3.5 | 138 km | 5 km |
| Jun 8, 2004 | 6 km N of Lone Grove, Oklahoma | M3.5 | 65 km | 5 km |
| Jan 6, 2015 | 4 km ENE of Irving, Texas | M3.5 | 112 km | 6 km |
| Mar 4, 2013 | 5 km S of Tishomingo, Oklahoma | M3.5 | 95 km | 5 km |
| Apr 19, 2021 | 8 km SW of Dibble, Oklahoma | M3.5 | 143 km | 11 km |
| Nov 25, 2013 | 3 km WNW of Sanctuary, Texas | M3.4 | 87 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
698 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF5. Total: 54 fatalities, 637 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Apr 3, 1964 | EF5 | 93 km | 4.7 mi | 7 |
| Apr 27, 2024 | EF4 | 43 km | 26.8 mi | 1 |
| May 9, 2016 | EF4 | 97 km | 8.9 mi | 1 |
| Feb 10, 2009 | EF4 | 28 km | 37.0 mi | 8 |
| Apr 19, 1972 | EF4 | 76 km | 28.2 mi | 5 |
| May 26, 1962 | EF4 | 99 km | 10.1 mi | 0 |
| Apr 2, 1957 | EF4 | 88 km | 5.2 mi | 2 |
| Nov 3, 2024 | EF3 | 78 km | 21.7 mi | 0 |
| May 25, 2024 | EF3 | 81 km | 0.7 mi | 0 |
| May 25, 2024 | EF3 | 28 km | 47.3 mi | 7 |
| Apr 27, 2024 | EF3 | 100 km | 9.9 mi | 1 |
| May 10, 2010 | EF3 | 64 km | 4.9 mi | 0 |
| May 9, 2006 | EF3 | 100 km | 9.3 mi | 3 |
| May 7, 1995 | EF3 | 15 km | 34.1 mi | 3 |
| May 7, 1995 | EF3 | 20 km | 26.0 mi | 2 |
| Mar 13, 1990 | EF3 | 67 km | 22.0 mi | 0 |
| Apr 2, 1982 | EF3 | 48 km | 0.5 mi | 0 |
| Oct 30, 1979 | EF3 | 64 km | 8.4 mi | 3 |
| Apr 10, 1979 | EF3 | 73 km | 12.8 mi | 0 |
| May 15, 1977 | EF3 | 85 km | 0.8 mi | 1 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Wildfire History
20 wildfires (100+ acres) recorded within 100 km. Largest: LOCO-HEALDTON (56,584 acres, 2009).
| Year | Name | Acres Burned | Distance |
| 2009 | LOCO-HEALDTON | 56,584 | 69 km |
| 1991 | ARBUCKLE | 29,823 | 84 km |
| 2021 | WINDMILL | 28,410 | 82 km |
| 2009 | MONTAGUE COUNTY COMPLEX | 25,907 | 34 km |
| 2009 | RATCLIFF CITY-TATUMS | 23,099 | 89 km |
| 2009 | TWO MILE HILL COMPLEX | 20,991 | 88 km |
| 2009 | BRUSHY MOUNTAIN | 18,412 | 44 km |
| 2006 | RINGGOLD | 16,382 | 34 km |
| 2005 | UNNAMED | 15,416 | 85 km |
| 2009 | APRIL 9TH COMPLEX 2 | 13,805 | 73 km |
| 1996 | HENRIETTA FIRE | 13,629 | 58 km |
| 2006 | RATLIFF CITY | 12,435 | 80 km |
| 1996 | POOLVILLE FIRE | 12,128 | 82 km |
| 2000 | UNNAMED | 9,943 | 85 km |
| 2006 | BIA EMPIRE | 7,544 | 94 km |
| 2011 | CHERRY HOMES | 7,398 | 59 km |
| 1988 | UNNAMED | 7,228 | 86 km |
| 2006 | BIALOCO | 6,843 | 70 km |
| 2011 | ENMIN FIRE | 6,618 | 91 km |
| 2009 | MONTAGUE COUNTY COMPLEX | 6,505 | 10 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 42°F (6°C) | 1.6 in | Coldest, Driest |
| February | 46°F (8°C) | 2.0 in | |
| March | 55°F (13°C) | 2.7 in | |
| April | 63°F (17°C) | 3.0 in | |
| May | 70°F (21°C) | 4.6 in | Wettest |
| June | 78°F (26°C) | 3.5 in | |
| July | 84°F (29°C) | 2.0 in | Warmest |
| August | 82°F (28°C) | 2.4 in | |
| September | 75°F (24°C) | 4.2 in | |
| October | 65°F (18°C) | 3.6 in | |
| November | 53°F (12°C) | 2.3 in | |
| December | 45°F (7°C) | 1.8 in |
St. Jo has a seasonal temperature swing of 42°F / from 42°F in January to 84°F in July. Total annual precipitation is 33.6 inches, with May being the wettest month (4.6") and January the driest (1.6").