Weather & Climate in Somerset, MD

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

Somerset enjoys a temperate climate with an average annual temperature of 56°F (13°C). Winters average 34°F in January while summers reach 78°F in July. The area gets 293 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 48.5 inches (wetter than the 38-inch national average). The area receives 5.8 inches of snow annually. Air quality is rated Good with a median AQI of 41. The city sits at an elevation of 305 feet.

Temperature

34°F Jan (1°C) 78°F Jul (26°C)

Annual Average	56.2°F
	4% above US avg
January Average	34°F (1°C)
July Average	78°F (26°C)
Sunny Days	293 days/yr

Geography

Elevation	305 ft (93 m)
Area	0.3 sq mi (0.7 km²)
Population Density	3,643/sq mi
Coordinates	38.9666°N, 77.0963°W
Timezone	America/New_York
County	District of Columbia County
Nearest Airport	Ronald Reagan Washington Ntl (DCA) 9 miles away

Precipitation & Snow

Annual Rainfall 48.5"

28% above US avg

Snowfall 5.8"

Wettest Month (May) 4.13"

Driest Month (Feb) 2.76"

Air Quality

AQI Median	41.0
Rating	Good

Natural Hazard Risk

Overall Risk	Relatively High
Risk Score	97.6 / 100
Social Vulnerability	40.9 / 100
Community Resilience	93.3 / 100

Hazard Breakdown

Tornado	Relatively High
Hurricane	Relatively High
Earthquake	Relatively High
Wildfire	Very Low
Flood	Relatively High
Hail	Relatively High
Strong Wind	Very High
Heat Wave	Relatively High
Winter Weather	Very High
Lightning	Very High
Ice Storm	Relatively Moderate
Drought	No Rating
Cold Wave	Relatively High
Landslide	Relatively Low
Coastal Flood	Relatively Moderate

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

Earthquake History

42 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M5.8.

Aug 23, 2011	11 km SSW of Mineral, Virginia	M5.8	138 km	6 km
Aug 25, 2011	8 km SW of Mineral, Virginia	M4.5	136 km	7 km
Aug 24, 2011	11 km SSW of Mineral, Virginia	M4.2	139 km	0 km
Jul 16, 2010	5 km NNW of Barnesville, Maryland	M3.6	43 km	7 km
Sep 1, 2011	7 km SSW of Mineral, Virginia	M3.4	134 km	3 km
Aug 24, 2011	16 km NNW of Goochland, Virginia	M3.4	147 km	0 km
Oct 23, 1990	3 km W of Hancocks Bridge, New Jersey	M3.2	150 km	10 km
Jan 30, 2012	9 km SSE of Louisa, Virginia	M3.1	137 km	3 km
Jun 3, 2010	4 km ENE of Franklintown, Pennsylvania	M3.1	125 km	2 km
Jan 17, 2016	3 km NE of Ranson, West Virginia	M3.0	74 km	5 km
Oct 12, 2011	9 km S of Louisa, Virginia	M3.0	138 km	4 km
Oct 2, 2010	10 km NNW of Ashland, Virginia	M3.0	129 km	19 km
Mar 26, 2012	13 km S of Louisa, Virginia	M3.0	141 km	9 km
Nov 14, 1997	0 km S of Rothsville, Pennsylvania	M3.0	150 km	5 km
Apr 24, 2009	1 km S of Franklintown, Pennsylvania	M2.9	122 km	1 km
Sep 15, 2019	5 km ESE of East Berlin, Pennsylvania	M2.8	108 km	5 km
Mar 15, 2015	6 km SW of Mineral, Virginia	M2.8	134 km	5 km
Aug 23, 2011	9 km SSW of Mineral, Virginia	M2.8	136 km	0 km
Jan 14, 2025	1 km NNE of Wyndham, Virginia	M2.8	147 km	0 km
Oct 25, 2009	4 km ENE of Franklintown, Pennsylvania	M2.8	126 km	1 km

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

Hurricane History

5 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 2.

Year	Name	Category	Max Wind	Closest
2011	Irene	Category 1	75 mph	206 km
2003	Isabel	Category 1	75 mph	258 km
1999	Floyd	Category 1	—	256 km
1986	Charley	Category 1	81 mph	240 km
1985	Gloria	Category 2	98 mph	234 km

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

Tornado History

490 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 9 fatalities, 370 injuries.

Date	Rating	Distance	Path	Fatalities
Apr 28, 2002	EF4	47 km	38.0 mi	3
Sep 24, 2001	EF4	88 km	10.0 mi	0
Sep 17, 2004	EF3	79 km	9.0 mi	0
Apr 28, 2002	EF3	92 km	18.0 mi	0
Sep 24, 2001	EF3	11 km	17.5 mi	2
Jul 19, 1996	EF3	60 km	2.2 mi	0
May 22, 1983	EF3	83 km	2.0 mi	0
Sep 5, 1979	EF3	21 km	17.9 mi	1
Jan 26, 1978	EF3	55 km	0.7 mi	1
Apr 1, 1973	EF3	27 km	9.8 mi	0
Jun 9, 1961	EF3	49 km	0.1 mi	0
Apr 5, 1952	EF3	93 km	17.5 mi	0
Sep 1, 2021	EF2	45 km	11.4 mi	0
Nov 2, 2018	EF2	43 km	5.5 mi	0
Jul 23, 2017	EF2	65 km	2.4 mi	0
May 8, 2008	EF2	77 km	3.4 mi	0
Sep 17, 2004	EF2	48 km	4.0 mi	0
Sep 17, 2004	EF2	32 km	15.0 mi	0
Sep 17, 2004	EF2	95 km	5.0 mi	0
Sep 17, 2004	EF2	71 km	8.0 mi	0

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

Wildfire History

2 wildfires (100+ acres) recorded within 100 km. Largest: SMITH RUN FIRE (1,908 acres, 2011).

Year	Name	Acres Burned	Distance
2011	SMITH RUN FIRE	1,908	95 km
1999	NCO	816	52 km

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

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	34°F (1°C)	3.1 in	Coldest
February	37°F (3°C)	2.8 in	Driest
March	45°F (7°C)	3.6 in
April	55°F (13°C)	3.2 in
May	65°F (18°C)	4.1 in	Wettest
June	73°F (23°C)	3.5 in
July	78°F (26°C)	3.9 in	Warmest
August	76°F (24°C)	3.8 in
September	69°F (21°C)	3.7 in
October	58°F (14°C)	3.3 in
November	48°F (9°C)	3.4 in
December	39°F (4°C)	3.2 in

Somerset has a seasonal temperature swing of 44°F / from 34°F in January to 78°F in July. Total annual precipitation is 41.6 inches, with May being the wettest month (4.1") and February the driest (2.8").

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