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Weather & Climate in Cosby, TN
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Cosby enjoys a temperate climate with an average annual temperature of 58°F (14°C). Winters average 39°F in January while summers reach 76°F in July. The area gets 301 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 53.9 inches (wetter than the 38-inch national average). The area receives 5.6 inches of snow annually. Air quality is rated Good with a median AQI of 40. The city sits at an elevation of 1,723 feet.
Temperature
39°F Jan (4°C)
76°F Jul (24°C)
| Annual Average | 58.0°F |
| 7% above US avg | |
| January Average | 39°F (4°C) |
| July Average | 76°F (24°C) |
| Sunny Days | 301 days/yr |
Geography
| Elevation | 1,723 ft (525 m) |
| Area | 5.5 sq mi (14.3 km²) |
| Population Density | 94/sq mi |
| Coordinates | 35.7951°N, 83.2457°W |
| Timezone | America/Chicago |
| County | Cocke County County |
| Nearest Airport | Mc Ghee Tyson (TYS) 42 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 40.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 54.5 / 100 |
| Social Vulnerability | 86.1 / 100 |
| Community Resilience | 8.5 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Very Low |
| Earthquake | Relatively Low |
| Wildfire | Very Low |
| Flood | Relatively Low |
| Hail | Relatively Low |
| Strong Wind | Relatively Moderate |
| Heat Wave | Very Low |
| Winter Weather | Very Low |
| Lightning | Relatively Moderate |
| Ice Storm | Relatively Low |
| Drought | Relatively Low |
| Cold Wave | Relatively Low |
| Landslide | Relatively Moderate |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
160 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.1.
| May 10, 2025 | 21 km SE of Greenback, Tennessee | M4.1 | 73 km | 25 km |
| Aug 17, 1990 | 9 km NNW of Loyall, Kentucky | M4.0 | 127 km | 1 km |
| Jan 20, 2020 | 2 km NE of Fincastle, Tennessee | M3.8 | 100 km | 35 km |
| Jul 30, 1997 | 6 km NNE of Tazewell, Tennessee | M3.8 | 84 km | 23 km |
| Sep 17, 2004 | 8 km ESE of Corbin, Kentucky | M3.7 | 144 km | 1 km |
| Jul 5, 1995 | 12 km ESE of Tellico Plains, Tennessee | M3.7 | 98 km | 10 km |
| Jun 17, 1998 | 9 km SSE of Coalfield, Tennessee | M3.6 | 105 km | 11 km |
| Jun 16, 2006 | 9 km W of Maggie Valley, North Carolina | M3.4 | 32 km | 1 km |
| Mar 5, 2019 | 7 km NE of Maynardville, Tennessee | M3.4 | 71 km | 17 km |
| Apr 11, 2006 | 5 km NE of Etowah, Tennessee | M3.3 | 122 km | 20 km |
| Apr 20, 2010 | 4 km SW of Maryville, Tennessee | M3.3 | 69 km | 2 km |
| Aug 31, 2009 | 2 km NNE of Friendsville, Tennessee | M3.3 | 79 km | 14 km |
| Jun 4, 2023 | 4 km NNW of West Canton, North Carolina | M3.2 | 41 km | 0 km |
| Jan 27, 2009 | 4 km NE of Williamsburg, Kentucky | M3.2 | 135 km | 26 km |
| Aug 1, 2009 | 8 km ENE of Ducktown, Tennessee | M3.2 | 125 km | 5 km |
| Jul 26, 2001 | 11 km S of New Market, Tennessee | M3.2 | 36 km | 17 km |
| Nov 8, 1990 | 5 km SW of Blackey, Kentucky | M3.2 | 147 km | 0 km |
| Jul 26, 2001 | 11 km N of Sevierville, Tennessee | M3.2 | 34 km | 14 km |
| Mar 7, 2001 | 5 km WNW of Decatur, Tennessee | M3.2 | 147 km | 18 km |
| May 10, 2006 | 3 km WNW of Madisonville, Tennessee | M3.2 | 108 km | 25 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Hurricane History
1 hurricane (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 1.
| Year | Name | Category | Max Wind | Closest |
| 1989 | Hugo | Category 2 | 98 mph | 230 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Tornado History
155 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 14 fatalities, 220 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Apr 27, 2011 | EF4 | 78 km | 14.5 mi | 0 |
| Jul 27, 2014 | EF3 | 100 km | 4.7 mi | 0 |
| Apr 27, 2011 | EF3 | 60 km | 13.6 mi | 2 |
| Apr 27, 2011 | EF3 | 48 km | 15.8 mi | 6 |
| Mar 23, 2011 | EF3 | 90 km | 5.8 mi | 0 |
| Feb 21, 1993 | EF3 | 94 km | 16.0 mi | 0 |
| Jul 10, 1980 | EF3 | 92 km | 1.9 mi | 0 |
| Aug 7, 2023 | EF2 | 84 km | 3.7 mi | 0 |
| Mar 2, 2012 | EF2 | 96 km | 2.6 mi | 0 |
| Apr 27, 2011 | EF2 | 81 km | 16.9 mi | 0 |
| Apr 27, 2011 | EF2 | 74 km | 8.8 mi | 0 |
| Apr 24, 2010 | EF2 | 97 km | 14.0 mi | 0 |
| May 8, 2009 | EF2 | 80 km | 2.2 mi | 0 |
| Nov 10, 2002 | EF2 | 97 km | 5.5 mi | 0 |
| May 7, 1984 | EF2 | 100 km | 1.0 mi | 0 |
| Jul 6, 1980 | EF2 | 87 km | 11.5 mi | 0 |
| Jun 28, 1976 | EF2 | 53 km | 0.2 mi | 0 |
| Feb 18, 1976 | EF2 | 17 km | 1.0 mi | 0 |
| Jan 10, 1975 | EF2 | 81 km | 4.3 mi | 0 |
| Apr 3, 1974 | EF2 | 61 km | 0.5 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Wildfire History
20 wildfires (100+ acres) recorded within 100 km. Largest: ROCK MOUNTAIN (25,224 acres, 2016).
| Year | Name | Acres Burned | Distance |
| 2016 | ROCK MOUNTAIN | 25,224 | 93 km |
| 2016 | CHIMNEY TOPS 2 | 14,998 | 26 km |
| 2016 | TELLICO | 14,172 | 63 km |
| 1987 | UNNAMED | 10,327 | 100 km |
| 2016 | BOTELER | 8,626 | 90 km |
| 2016 | PARTY ROCK | 8,572 | 98 km |
| 2024 | RX - T26 BRUSHY RIDGE | 8,324 | 94 km |
| 2016 | PINNACLE MOUNTAIN | 7,869 | 95 km |
| 2016 | MAPLE SPRINGS | 7,696 | 77 km |
| 2016 | SILVER MINE | 6,082 | 43 km |
| 2001 | SHARP | 6,039 | 38 km |
| 2024 | RX - T10 MILLER RIDGE | 5,154 | 90 km |
| 1987 | UNNAMED | 4,337 | 95 km |
| 2013 | BEAVER DAM | 4,336 | 98 km |
| 2022 | LOST BEAR RX FY2022 | 4,276 | 93 km |
| 2021 | UNNAMED | 3,888 | 90 km |
| 2019 | COW CAMP | 3,786 | 84 km |
| 2016 | CAMP BRANCH | 3,234 | 74 km |
| 2023 | PANTHER KNOB | 3,170 | 80 km |
| 2001 | LARMAN | 3,072 | 39 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 39°F (4°C) | 4.9 in | |
| February | 36°F (2°C) | 4.8 in | Coldest |
| March | 43°F (6°C) | 5.9 in | Wettest |
| April | 51°F (10°C) | 4.6 in | |
| May | 59°F (15°C) | 5.5 in | |
| June | 65°F (19°C) | 5.0 in | |
| July | 76°F (24°C) | 5.4 in | Warmest |
| August | 68°F (20°C) | 4.8 in | |
| September | 63°F (17°C) | 4.3 in | |
| October | 53°F (12°C) | 3.6 in | Driest |
| November | 45°F (7°C) | 4.7 in | |
| December | 37°F (3°C) | 4.7 in |
Cosby has a seasonal temperature swing of 39°F / from 36°F in February to 76°F in July. Total annual precipitation is 58.1 inches, with March being the wettest month (5.9") and October the driest (3.6").