Weather & Climate in Seymour, TN

Temperature, precipitation, air quality, natural hazards, and monthly weather data.

Seymour enjoys a temperate climate with an average annual temperature of 59°F (15°C). Winters average 38°F in January while summers reach 78°F in July. The area gets 310 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 48.8 inches (wetter than the 38-inch national average). The area receives 3.6 inches of snow annually. Air quality is rated Good with a median AQI of 40. The city sits at an elevation of 1,210 feet.

Temperature

38°F Jan (3°C) 78°F Jul (26°C)

Annual Average	59.0°F
	9% above US avg
January Average	38°F (3°C)
July Average	78°F (26°C)
Sunny Days	310 days/yr

Geography

Elevation	1,210 ft (369 m)
Area	12.6 sq mi (32.7 km²)
Population Density	993/sq mi
Coordinates	35.8827°N, 83.7616°W
Timezone	America/Chicago
County	Knox County County
Nearest Airport	Mc Ghee Tyson (TYS) 14 miles away

Precipitation & Snow

Annual Rainfall 48.8"

28% above US avg

Snowfall 3.6"

Wettest Month (Mar) 4.92"

Driest Month (Oct) 2.80"

Air Quality

AQI Median	40.0
Rating	Good

Natural Hazard Risk

Overall Risk	Relatively Moderate
Risk Score	92.1 / 100
Social Vulnerability	22.7 / 100
Community Resilience	61.3 / 100

Hazard Breakdown

Tornado	Relatively High
Hurricane	Relatively Low
Earthquake	Relatively Moderate
Wildfire	Very Low
Flood	Relatively Moderate
Hail	Relatively Low
Strong Wind	Relatively High
Heat Wave	Relatively Low
Winter Weather	Relatively High
Lightning	Very High
Ice Storm	Relatively High
Drought	Relatively Low
Cold Wave	Relatively High
Landslide	Relatively Moderate

Source: FEMA National Risk Index v1.20 (Dec 2025)

Earthquake History

174 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	43 km	25 km
Aug 17, 1990	9 km NNW of Loyall, Kentucky	M4.0	122 km	1 km
Jul 30, 1997	6 km NNE of Tazewell, Tennessee	M3.8	73 km	23 km
Jan 20, 2020	2 km NE of Fincastle, Tennessee	M3.8	65 km	35 km
Sep 17, 2004	8 km ESE of Corbin, Kentucky	M3.7	119 km	1 km
Jul 5, 1995	12 km ESE of Tellico Plains, Tennessee	M3.7	71 km	10 km
Jun 17, 1998	9 km SSE of Coalfield, Tennessee	M3.6	57 km	11 km
Jun 19, 2007	10 km ENE of Spencer, Tennessee	M3.5	145 km	1 km
Jul 19, 1997	12 km E of Cohutta, Georgia	M3.5	141 km	3 km
Jun 16, 2006	9 km W of Maggie Valley, North Carolina	M3.4	65 km	1 km
Mar 5, 2019	7 km NE of Maynardville, Tennessee	M3.4	46 km	17 km
Apr 11, 2006	5 km NE of Etowah, Tennessee	M3.3	87 km	20 km
Mar 18, 1995	10 km SE of Dayton, Tennessee	M3.3	118 km	26 km
Aug 31, 2009	2 km NNE of Friendsville, Tennessee	M3.3	35 km	14 km
Apr 20, 2010	4 km SW of Maryville, Tennessee	M3.3	28 km	2 km
Jun 4, 2023	4 km NNW of West Canton, North Carolina	M3.2	87 km	0 km
Mar 7, 2001	6 km NW of Decatur, Tennessee	M3.2	105 km	7 km
Jul 26, 2001	11 km N of Sevierville, Tennessee	M3.2	21 km	14 km
Jan 27, 2009	4 km NE of Williamsburg, Kentucky	M3.2	104 km	26 km
May 10, 2006	3 km WNW of Madisonville, Tennessee	M3.2	69 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 1	—	275 km

Source: NOAA IBTrACS (Category 1+, 1980–2026).

Tornado History

179 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 24 fatalities, 387 injuries.

Date	Rating	Distance	Path	Fatalities
Apr 27, 2011	EF4	47 km	14.5 mi	0
Jul 27, 2014	EF3	68 km	4.7 mi	0
Apr 27, 2011	EF3	88 km	15.8 mi	6
Apr 27, 2011	EF3	99 km	13.6 mi	2
Mar 23, 2011	EF3	49 km	5.8 mi	0
Nov 10, 2002	EF3	77 km	8.3 mi	7
Feb 21, 1993	EF3	47 km	16.0 mi	0
Feb 21, 1993	EF3	60 km	30.0 mi	1
Feb 21, 1993	EF3	84 km	19.0 mi	0
May 9, 1988	EF3	80 km	5.0 mi	1
Apr 8, 1974	EF3	93 km	2.0 mi	0
Apr 3, 1974	EF3	91 km	12.2 mi	0
Mar 12, 1967	EF3	93 km	2.0 mi	0
Aug 7, 2023	EF2	36 km	3.7 mi	0
Apr 8, 2021	EF2	76 km	1.3 mi	0
Apr 8, 2021	EF2	76 km	1.8 mi	0
Nov 30, 2016	EF2	95 km	11.3 mi	0
Mar 2, 2012	EF2	78 km	2.6 mi	0
Mar 2, 2012	EF2	76 km	14.3 mi	0
Mar 2, 2012	EF2	99 km	21.5 mi	0

Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).

Wildfire History

20 wildfires (100+ acres) recorded within 100 km. Largest: CHIMNEY TOPS 2 (14,998 acres, 2016).

Year	Name	Acres Burned	Distance
2016	CHIMNEY TOPS 2	14,998	32 km
2016	TELLICO	14,172	67 km
1987	UNNAMED	11,663	68 km
2016	STINKING CREEK	10,768	75 km
1987	UNNAMED	10,327	69 km
2016	BOTELER	8,626	91 km
2024	RX - T26 BRUSHY RIDGE	8,324	68 km
2000	UNNAMED	8,064	66 km
2016	MAPLE SPRINGS	7,696	57 km
2000	UNNAMED	6,590	86 km
1987	K-T FIRE	6,372	96 km
2016	SILVER MINE	6,082	88 km
1987	UNNAMED	6,067	83 km
2001	SHARP	6,039	50 km
1987	UNNAMED	5,973	75 km
2000	UNNAMED	5,371	64 km
2024	RX - T10 MILLER RIDGE	5,154	61 km
2003	UNNAMED	4,675	89 km
1987	UNNAMED	4,400	94 km
1987	UNNAMED	4,337	68 km

Source: NIFC/IRWIN Wildfire Records (100+ acres).

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	38°F (3°C)	4.1 in	Coldest
February	40°F (5°C)	3.9 in
March	48°F (9°C)	4.9 in	Wettest
April	56°F (14°C)	3.9 in
May	65°F (18°C)	4.5 in
June	73°F (23°C)	4.1 in
July	78°F (26°C)	4.9 in	Warmest
August	75°F (24°C)	3.9 in
September	70°F (21°C)	3.3 in
October	58°F (14°C)	2.8 in	Driest
November	48°F (9°C)	3.7 in
December	40°F (5°C)	4.2 in

Seymour has a seasonal temperature swing of 40°F / from 38°F in January to 78°F in July. Total annual precipitation is 48.3 inches, with March being the wettest month (4.9") and October the driest (2.8").

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