Weather & Climate in Dennis, MS

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

Dennis enjoys a temperate climate with an average annual temperature of 59°F (15°C). Winters average 39°F in January while summers reach 78°F in July. The area gets 302 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 62.3 inches (wetter than the 38-inch national average). Air quality is rated Good with a median AQI of 43. The city sits at an elevation of 593 feet.

Temperature

39°F Jan (4°C) 78°F Jul (25°C)

Annual Average	59.0°F
	9% above US avg
January Average	39°F (4°C)
July Average	78°F (25°C)
Sunny Days	302 days/yr

Geography

Elevation	593 ft (181 m)
Area	1.4 sq mi (3.5 km²)
Population Density	66/sq mi
Coordinates	34.5589°N, 88.2303°W
Timezone	America/Chicago
County	Tishomingo County County
Nearest Airport	Tupelo Regional (TUP) 37 miles away

Precipitation & Snow

Annual Rainfall 62.3"

64% above US avg

Wettest Month (Mar) 6.34"

Driest Month (Aug) 3.39"

Air Quality

AQI Median	43.0
Rating	Good

Natural Hazard Risk

Overall Risk	Very Low
Risk Score	37.1 / 100
Social Vulnerability	77.9 / 100
Community Resilience	28.0 / 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	Relatively Low
Winter Weather	Very Low
Lightning	Relatively Low
Ice Storm	Relatively Low
Drought	Relatively Low
Cold Wave	Relatively Moderate
Landslide	Relatively Low

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

Earthquake History

36 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.3.

Jul 15, 1995	21 km SSW of Berry, Alabama	M3.3	131 km	1 km
Jun 23, 1990	12 km E of Vernon, Alabama	M3.2	92 km	1 km
Sep 2, 1990	12 km NW of Fayette, Alabama	M3.2	93 km	1 km
May 10, 2008	1 km SSE of Sherman, Mississippi	M3.1	60 km	0 km
Jun 23, 1990	8 km N of Belk, Alabama	M3.1	97 km	6 km
May 4, 2007	4 km SSW of Jasper, Alabama	M3.0	121 km	5 km
May 4, 1994	2 km NNW of Addison, Alabama	M3.0	102 km	19 km
May 4, 1994	12 km NNW of Addison, Alabama	M3.0	95 km	5 km
May 28, 2000	3 km NE of Fayette, Alabama	M3.0	102 km	0 km
May 28, 2000	13 km S of Winfield, Alabama	M3.0	91 km	5 km
Jan 5, 2012	11 km NW of Oakman, Alabama	M2.9	110 km	8 km
Jan 2, 2000	4 km SW of Lester, Alabama	M2.9	106 km	10 km
Jan 2, 2000	4 km SW of Lester, Alabama	M2.9	106 km	13 km
Jun 25, 2020	4 km NNW of Berry, Alabama	M2.9	112 km	1 km
May 13, 1999	7 km NW of Elkmont, Alabama	M2.8	119 km	10 km
Sep 20, 1990	6 km N of Elkmont, Alabama	M2.8	125 km	4 km
May 13, 1999	11 km S of Pulaski, Tennessee	M2.8	125 km	20 km
Jun 7, 2005	21 km WNW of Rock Creek, Alabama	M2.8	143 km	5 km
Oct 3, 1993	3 km SW of Oakman, Alabama	M2.8	123 km	10 km
Mar 11, 2006	17 km E of Olivet, Tennessee	M2.7	74 km	2 km

Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.

Tornado History

532 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF5. Total: 221 fatalities, 1,868 injuries.

Date	Rating	Distance	Path	Fatalities
Apr 27, 2011	EF5	51 km	132.0 mi	72
Apr 27, 2011	EF5	60 km	37.1 mi	23
Apr 16, 1998	EF5	76 km	69.4 mi	3
Apr 3, 1974	EF5	70 km	52.0 mi	28
Apr 3, 1974	EF5	82 km	79.5 mi	28
Feb 6, 2008	EF4	88 km	16.7 mi	4
Feb 5, 2008	EF4	79 km	16.2 mi	3
May 18, 1995	EF4	84 km	29.0 mi	3
Apr 19, 1970	EF4	73 km	47.6 mi	4
Apr 29, 1963	EF4	66 km	4.7 mi	3
May 8, 2024	EF3	95 km	3.8 mi	0
Mar 31, 2023	EF3	85 km	86.0 mi	9
Mar 24, 2023	EF3	92 km	36.6 mi	2
Dec 23, 2015	EF3	69 km	48.4 mi	0
Apr 28, 2014	EF3	66 km	31.0 mi	0
Apr 28, 2014	EF3	94 km	15.6 mi	2
Apr 27, 2011	EF3	65 km	31.8 mi	0
Apr 27, 2011	EF3	92 km	8.0 mi	0
May 2, 2010	EF3	92 km	29.6 mi	3
May 8, 2008	EF3	61 km	7.6 mi	0

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

Wildfire History

20 wildfires (100+ acres) recorded within 100 km. Largest: C-55 CHILLI LAKE (3,555 acres, 2014).

Year	Name	Acres Burned	Distance
2014	C-55 CHILLI LAKE	3,555	85 km
2014	UNNAMED	3,112	83 km
2017	UNNAMED	3,031	84 km
2006	WITCHDCE W	2,846	95 km
2020	BK OWL CREEK	2,838	92 km
2014	UNNAMED	2,822	93 km
2017	UNNAMED	2,764	91 km
2019	UNNAMED	2,710	100 km
2016	UNNAMED	2,602	100 km
2017	UNNAMED	2,442	85 km
2015	BIG TREE	2,288	79 km
2007	WITCHDANCE EAST	2,285	94 km
2018	UNNAMED	2,264	88 km
2017	UNNAMED	2,248	97 km
2010	BALLS MT.	2,229	77 km
2021	TOMBIGBEE CPT - 18/19/23/24	2,201	95 km
2022	HOLLY SPRINGS BB 51/52/53	2,182	83 km
2015	UNNAMED	2,160	99 km
2014	UNNAMED	2,143	77 km
2017	UNNAMED	2,114	99 km

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

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	39°F (4°C)	5.0 in	Coldest
February	44°F (6°C)	4.8 in
March	52°F (11°C)	6.3 in	Wettest
April	60°F (16°C)	5.4 in
May	68°F (20°C)	5.9 in
June	75°F (24°C)	4.1 in
July	78°F (25°C)	4.3 in
August	78°F (26°C)	3.4 in	Warmest, Driest
September	72°F (22°C)	4.0 in
October	61°F (16°C)	3.5 in
November	51°F (11°C)	5.2 in
December	43°F (6°C)	6.1 in

Dennis has a seasonal temperature swing of 39°F / from 39°F in January to 78°F in August. Total annual precipitation is 58.1 inches, with March being the wettest month (6.3") and August the driest (3.4").

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