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Weather & Climate in Castalian Springs, TN
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Castalian Springs enjoys a temperate climate with an average annual temperature of 57°F (14°C). Winters average 35°F in January while summers reach 77°F in July. The area gets 299 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 55.0 inches (wetter than the 38-inch national average). The area receives 4.6 inches of snow annually. Air quality is rated Good with a median AQI of 40. The city sits at an elevation of 561 feet.
Temperature
35°F Jan (2°C)
77°F Jul (25°C)
| Annual Average | 56.7°F |
| 5% above US avg | |
| January Average | 35°F (2°C) |
| July Average | 77°F (25°C) |
| Sunny Days | 299 days/yr |
Geography
| Elevation | 561 ft (171 m) |
| Area | 5.8 sq mi (15.1 km²) |
| Population Density | 111/sq mi |
| Coordinates | 36.4012°N, 86.3068°W |
| Timezone | America/Chicago |
| County | Trousdale County County |
| Nearest Airport | Nashville International (BNA) 28 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 40.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 6.1 / 100 |
| Social Vulnerability | 10.6 / 100 |
| Community Resilience | 32.5 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Very Low |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Very Low |
| Hail | Very Low |
| Strong Wind | Relatively Low |
| Heat Wave | Very Low |
| Winter Weather | Very Low |
| Lightning | Very Low |
| Ice Storm | Very Low |
| Drought | Very Low |
| Cold Wave | Relatively Low |
| Landslide | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
23 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.5.
| Jun 19, 2007 | 10 km ENE of Spencer, Tennessee | M3.5 | 109 km | 1 km |
| May 10, 2020 | 7 km SSE of Sewanee, Tennessee | M3.1 | 145 km | 8 km |
| Nov 28, 1998 | 6 km SW of Bremen, Kentucky | M2.9 | 133 km | 0 km |
| Jun 8, 2014 | 8 km WNW of Dayton, Tennessee | M2.8 | 146 km | 14 km |
| Jan 28, 1991 | 9 km SW of Sacramento, Kentucky | M2.8 | 139 km | 1 km |
| May 10, 2020 | 7 km SSE of Sewanee, Tennessee | M2.8 | 145 km | 6 km |
| Jan 16, 2019 | 5 km SSE of Wartrace, Tennessee | M2.8 | 102 km | 7 km |
| Feb 27, 2020 | 5 km SW of Bremen, Kentucky | M2.6 | 133 km | 27 km |
| Jul 8, 2001 | 7 km SE of Franklin, Tennessee | M2.6 | 73 km | 0 km |
| Mar 22, 1990 | 9 km E of Rochester, Kentucky | M2.6 | 99 km | 5 km |
| Dec 8, 1997 | 6 km NE of Murfreesboro, Tennessee | M2.6 | 58 km | 0 km |
| Jan 8, 1995 | Kentucky | M2.6 | 124 km | 30 km |
| Mar 10, 2024 | 14 km W of Graysville, Tennessee | M2.6 | 141 km | 22 km |
| Feb 29, 2024 | 9 km NNW of Graysville, Tennessee | M2.6 | 144 km | 13 km |
| Jun 1, 2019 | 4 km ESE of Manchester, Tennessee | M2.6 | 107 km | 6 km |
| Jun 21, 2023 | 6 km SSE of Sewanee, Tennessee | M2.5 | 144 km | 9 km |
| Mar 8, 1990 | 4 km SW of Oak Grove, Kentucky | M2.5 | 111 km | 5 km |
| May 20, 2002 | 9 km NNE of Beersheba Springs, Tennessee | M2.5 | 114 km | 4 km |
| Mar 2, 2014 | 18 km W of Pikeville, Tennessee | M2.5 | 122 km | 18 km |
| Apr 24, 2011 | Tennessee | M2.5 | 149 km | 19 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
522 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 131 fatalities, 1,544 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Mar 3, 2020 | EF4 | 63 km | 8.4 mi | 19 |
| Apr 10, 2009 | EF4 | 87 km | 23.3 mi | 2 |
| Jan 24, 1997 | EF4 | 71 km | 6.5 mi | 0 |
| Dec 24, 1988 | EF4 | 76 km | 6.0 mi | 1 |
| Apr 3, 1974 | EF4 | 88 km | 38.4 mi | 10 |
| Apr 3, 1974 | EF4 | 78 km | 28.4 mi | 10 |
| Apr 27, 1970 | EF4 | 74 km | 42.6 mi | 3 |
| Dec 11, 2021 | EF3 | 82 km | 28.0 mi | 0 |
| Dec 11, 2021 | EF3 | 64 km | 29.3 mi | 16 |
| Mar 3, 2020 | EF3 | 64 km | 60.1 mi | 5 |
| Feb 6, 2008 | EF3 | 32 km | 9.4 mi | 4 |
| Feb 5, 2008 | EF3 | 4 km | 50.3 mi | 22 |
| Apr 7, 2006 | EF3 | 88 km | 18.8 mi | 0 |
| Apr 7, 2006 | EF3 | 43 km | 22.7 mi | 7 |
| May 11, 2003 | EF3 | 79 km | 1.0 mi | 0 |
| May 11, 2003 | EF3 | 51 km | 1.0 mi | 0 |
| May 4, 2003 | EF3 | 93 km | 11.5 mi | 0 |
| Apr 28, 2002 | EF3 | 73 km | 3.2 mi | 0 |
| Jan 22, 1999 | EF3 | 94 km | 4.3 mi | 0 |
| Apr 16, 1998 | EF3 | 66 km | 42.1 mi | 1 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Wildfire History
12 wildfires (100+ acres) recorded within 100 km. Largest: FLOATING MILL HOLLOW (2,422 acres, 2010).
| Year | Name | Acres Burned | Distance |
| 2010 | FLOATING MILL HOLLOW | 2,422 | 92 km |
| 2008 | BROOKS KNOB | 2,225 | 89 km |
| 2012 | FY2012 CRYSTAL CAVE BROADCAST BURN | 2,221 | 93 km |
| 2010 | JOPPA CHURCH | 2,037 | 87 km |
| 2004 | JIM LEE | 1,770 | 87 km |
| 2009 | TEMPLE HILL | 1,628 | 91 km |
| 2009 | JIM LEE | 1,613 | 87 km |
| 2007 | Big Woods | 1,500 | 96 km |
| 2008 | GOBLIN KNOB | 1,445 | 95 km |
| 2001 | UNNAMED | 848 | 87 km |
| 2007 | DENNISON FERRY RX | 655 | 94 km |
| 2005 | UNNAMED | 576 | 92 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 35°F (2°C) | 4.0 in | Coldest |
| February | 40°F (4°C) | 4.2 in | |
| March | 49°F (9°C) | 5.4 in | Wettest |
| April | 57°F (14°C) | 4.4 in | |
| May | 66°F (19°C) | 5.1 in | |
| June | 74°F (23°C) | 4.2 in | |
| July | 77°F (25°C) | 4.6 in | Warmest |
| August | 76°F (25°C) | 3.9 in | |
| September | 70°F (21°C) | 3.9 in | |
| October | 59°F (15°C) | 3.3 in | Driest |
| November | 48°F (9°C) | 4.7 in | |
| December | 40°F (4°C) | 5.3 in |
Castalian Springs has a seasonal temperature swing of 42°F / from 35°F in January to 77°F in July. Total annual precipitation is 52.9 inches, with March being the wettest month (5.4") and October the driest (3.3").