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Weather & Climate in Lake Tansi, TN
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Lake Tansi experiences four distinct seasons with an average annual temperature of 55°F (13°C). Winters average 35°F in January while summers reach 74°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 57.5 inches (wetter than the 38-inch national average). Air quality is rated Good with a median AQI of 40. The city sits at an elevation of 1,898 feet.
Temperature
35°F Jan (2°C)
74°F Jul (23°C)
| Annual Average | 55.3°F |
| 2% above US avg | |
| January Average | 35°F (2°C) |
| July Average | 74°F (23°C) |
| Sunny Days | 301 days/yr |
Geography
| Elevation | 1,898 ft (579 m) |
| Area | 9.3 sq mi (24.1 km²) |
| Population Density | 517/sq mi |
| Coordinates | 35.8703°N, 85.0606°W |
| Timezone | America/Chicago |
| County | Bledsoe County County |
| Nearest Airport | Mc Ghee Tyson (TYS) 60 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 40.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 24.1 / 100 |
| Social Vulnerability | 73.4 / 100 |
| Community Resilience | 4.7 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Very Low |
| Earthquake | Relatively Low |
| Wildfire | Very Low |
| Flood | Very Low |
| Hail | Very Low |
| Strong Wind | Relatively Low |
| Heat Wave | Very Low |
| Winter Weather | Relatively Low |
| Lightning | Relatively Low |
| Ice Storm | Very Low |
| Drought | Relatively Low |
| Cold Wave | Relatively Moderate |
| Landslide | Relatively Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
177 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 | 104 km | 25 km |
| Jan 20, 2020 | 2 km NE of Fincastle, Tennessee | M3.8 | 112 km | 35 km |
| Jul 5, 1995 | 12 km ESE of Tellico Plains, Tennessee | M3.7 | 101 km | 10 km |
| Jun 17, 1998 | 9 km SSE of Coalfield, Tennessee | M3.6 | 61 km | 11 km |
| Jul 19, 1997 | 12 km E of Cohutta, Georgia | M3.5 | 105 km | 3 km |
| Jun 19, 2007 | 10 km ENE of Spencer, Tennessee | M3.5 | 29 km | 1 km |
| Mar 5, 2019 | 7 km NE of Maynardville, Tennessee | M3.4 | 128 km | 17 km |
| Apr 20, 2010 | 4 km SW of Maryville, Tennessee | M3.3 | 97 km | 2 km |
| Mar 18, 1995 | 10 km SE of Dayton, Tennessee | M3.3 | 51 km | 26 km |
| Apr 11, 2006 | 5 km NE of Etowah, Tennessee | M3.3 | 77 km | 20 km |
| Aug 31, 2009 | 2 km NNE of Friendsville, Tennessee | M3.3 | 85 km | 14 km |
| Aug 1, 2009 | 8 km ENE of Ducktown, Tennessee | M3.2 | 114 km | 5 km |
| May 10, 2006 | 3 km WNW of Madisonville, Tennessee | M3.2 | 71 km | 25 km |
| Jul 26, 2001 | 11 km N of Sevierville, Tennessee | M3.2 | 136 km | 14 km |
| Mar 21, 2001 | 7 km ESE of Trenton, Georgia | M3.2 | 119 km | 0 km |
| Mar 7, 2001 | 5 km WNW of Decatur, Tennessee | M3.2 | 43 km | 18 km |
| Jan 27, 2009 | 4 km NE of Williamsburg, Kentucky | M3.2 | 130 km | 26 km |
| Apr 5, 1994 | 10 km N of Trenton, Georgia | M3.2 | 108 km | 24 km |
| Jul 26, 2001 | 11 km S of New Market, Tennessee | M3.2 | 136 km | 17 km |
| Mar 7, 2001 | 6 km NW of Decatur, Tennessee | M3.2 | 40 km | 7 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
347 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 103 fatalities, 1,339 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Mar 3, 2020 | EF4 | 64 km | 8.4 mi | 19 |
| Apr 27, 2011 | EF4 | 99 km | 14.5 mi | 0 |
| Apr 27, 2011 | EF4 | 67 km | 40.2 mi | 4 |
| Apr 3, 1974 | EF4 | 72 km | 11.0 mi | 5 |
| Apr 3, 1974 | EF4 | 91 km | 38.4 mi | 10 |
| Apr 3, 1974 | EF4 | 42 km | 18.8 mi | 7 |
| Apr 3, 1974 | EF4 | 88 km | 16.1 mi | 0 |
| Apr 3, 1974 | EF4 | 49 km | 28.4 mi | 10 |
| May 2, 1953 | EF4 | 47 km | 4.2 mi | 4 |
| Nov 30, 2016 | EF3 | 90 km | 4.6 mi | 2 |
| Mar 2, 2012 | EF3 | 83 km | 41.0 mi | 0 |
| Mar 23, 2011 | EF3 | 78 km | 5.8 mi | 0 |
| Nov 10, 2002 | EF3 | 5 km | 12.2 mi | 4 |
| Nov 10, 2002 | EF3 | 45 km | 8.3 mi | 7 |
| Apr 16, 1998 | EF3 | 74 km | 8.6 mi | 0 |
| Mar 29, 1997 | EF3 | 94 km | 8.0 mi | 0 |
| Mar 29, 1997 | EF3 | 81 km | 4.0 mi | 0 |
| May 18, 1995 | EF3 | 15 km | 9.0 mi | 0 |
| Apr 15, 1994 | EF3 | 61 km | 15.0 mi | 1 |
| Feb 21, 1993 | EF3 | 58 km | 30.0 mi | 1 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Wildfire History
20 wildfires (100+ acres) recorded within 100 km. Largest: UNNAMED (11,663 acres, 1987).
| Year | Name | Acres Burned | Distance |
| 1987 | UNNAMED | 11,663 | 73 km |
| 2000 | UNNAMED | 8,064 | 83 km |
| 1987 | UNNAMED | 5,973 | 93 km |
| 2000 | UNNAMED | 5,371 | 71 km |
| 2024 | RX - T10 MILLER RIDGE | 5,154 | 97 km |
| 2003 | UNNAMED | 4,675 | 28 km |
| 2001 | UNNAMED | 4,635 | 57 km |
| 2001 | UNNAMED | 4,213 | 75 km |
| 2021 | UNNAMED | 3,888 | 98 km |
| 1987 | UNNAMED | 3,854 | 83 km |
| 2009 | GOBBLERS KNOB B | 3,851 | 84 km |
| 2000 | UNNAMED | 3,539 | 28 km |
| 2016 | WHITE OAK CIRCLE | 3,182 | 59 km |
| 2016 | SR116-DEVONIA | 3,077 | 65 km |
| 2022 | UNNAMED | 2,933 | 83 km |
| 2000 | UNNAMED | 2,793 | 67 km |
| 2016 | UNNAMED | 2,758 | 83 km |
| 2001 | UNNAMED | 2,662 | 98 km |
| 1999 | UNNAMED | 2,638 | 62 km |
| 2024 | RX - O11 TOWEE O12 WILDCAT | 2,597 | 94 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 35°F (2°C) | 5.3 in | Coldest |
| February | 38°F (3°C) | 4.8 in | |
| March | 47°F (8°C) | 6.3 in | Wettest |
| April | 55°F (13°C) | 4.9 in | |
| May | 62°F (17°C) | 5.7 in | |
| June | 70°F (21°C) | 4.6 in | |
| July | 74°F (23°C) | 5.2 in | Warmest |
| August | 73°F (23°C) | 4.2 in | |
| September | 67°F (19°C) | 4.1 in | |
| October | 56°F (13°C) | 3.8 in | Driest |
| November | 47°F (8°C) | 5.2 in | |
| December | 39°F (4°C) | 5.9 in |
Lake Tansi has a seasonal temperature swing of 39°F / from 35°F in January to 74°F in July. Total annual precipitation is 59.9 inches, with March being the wettest month (6.3") and October the driest (3.8").