Weather & Climate in Hennepin, OK

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

Hennepin enjoys a temperate climate with an average annual temperature of 62°F (16°C). Winters average 40°F in January while summers reach 83°F in July. The area gets 320 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 38.4 inches. The area receives 3.8 inches of snow annually. Air quality is rated Good with a median AQI of 45. The city sits at an elevation of 905 feet.

Temperature

40°F Jan (4°C) 83°F Jul (28°C)

Annual Average	61.5°F
	14% above US avg
January Average	40°F (4°C)
July Average	83°F (28°C)
Sunny Days	320 days/yr

Geography

Elevation	905 ft (276 m)
Area	1.6 sq mi (4.1 km²)
Population Density	88/sq mi
Coordinates	34.5172°N, 97.3454°W
Timezone	America/Chicago
County	Garvin County County
Nearest Airport	Ada Regional (ADT) 43 miles away

Precipitation & Snow

Annual Rainfall 38.4"

1% above US avg

Snowfall 3.8"

Wettest Month (May) 5.51"

Driest Month (Jan) 1.46"

Air Quality

AQI Median	45.0
Rating	Good

Natural Hazard Risk

Overall Risk	Relatively Low
Risk Score	61.7 / 100
Social Vulnerability	53.2 / 100
Community Resilience	30.8 / 100

Hazard Breakdown

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

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

Earthquake History

1,732 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M5.1.

Feb 3, 2024	8 km NW of Prague, Oklahoma	M5.1	125 km	3 km
Dec 7, 2013	8 km SW of Arcadia, Oklahoma	M4.5	121 km	8 km
Sep 6, 1997	6 km N of Tupelo, Oklahoma	M4.5	85 km	5 km
Aug 19, 2014	12 km SSW of Guthrie, Oklahoma	M4.4	140 km	5 km
Apr 16, 2013	Oklahoma	M4.4	132 km	6 km
Jun 16, 2014	7 km NNE of Lake Aluma, Oklahoma	M4.3	120 km	5 km
Jan 13, 2024	6 km W of Arcadia, Oklahoma	M4.3	128 km	7 km
Apr 7, 2016	1 km E of Luther, Oklahoma	M4.2	128 km	6 km
Jan 18, 1995	4 km SSE of Erin Springs, Oklahoma	M4.2	37 km	5 km
Jan 1, 2016	6 km ENE of Edmond, Oklahoma	M4.2	128 km	6 km
Aug 3, 2017	6 km ENE of Edmond, Oklahoma	M4.2	129 km	5 km
Apr 16, 2013	3 km WSW of Wellston, Oklahoma	M4.2	131 km	7 km
Jun 18, 2014	7 km NE of Lake Aluma, Oklahoma	M4.1	120 km	5 km
Apr 3, 2012	8 km SSW of Pittsburg, Oklahoma	M4.1	135 km	5 km
Feb 27, 2010	8 km SE of Sparks, Oklahoma	M4.1	127 km	5 km
Jan 13, 2024	6 km ENE of Edmond, Oklahoma	M4.1	129 km	7 km
Apr 8, 2015	6 km S of Guthrie, Oklahoma	M4.0	145 km	2 km
Jun 20, 2015	9 km NW of Arcadia, Oklahoma	M4.0	136 km	3 km
Jul 12, 2014	7 km WNW of Meridian, Oklahoma	M4.0	150 km	4 km
Apr 10, 2014	12 km SE of Cedar Valley, Oklahoma	M4.0	140 km	7 km

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

Tornado History

891 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF5. Total: 131 fatalities, 2,125 injuries.

Date	Rating	Distance	Path	Fatalities
May 20, 2013	EF5	89 km	13.9 mi	24
May 3, 1999	EF5	82 km	37.0 mi	36
May 5, 1960	EF5	93 km	71.8 mi	5
Apr 27, 2024	EF4	70 km	26.8 mi	1
May 9, 2016	EF4	5 km	8.9 mi	1
May 19, 2013	EF4	82 km	23.0 mi	2
May 24, 2011	EF4	54 km	23.1 mi	0
May 24, 2011	EF4	78 km	33.3 mi	1
May 10, 2010	EF4	87 km	24.0 mi	2
May 10, 2010	EF4	74 km	22.3 mi	1
Feb 10, 2009	EF4	70 km	37.0 mi	8
May 8, 2003	EF4	92 km	17.3 mi	0
Apr 19, 1972	EF4	24 km	28.2 mi	5
Oct 5, 1970	EF4	98 km	25.0 mi	4
Apr 27, 1966	EF4	78 km	10.2 mi	0
May 4, 1960	EF4	69 km	8.0 mi	0
May 9, 1959	EF4	71 km	6.2 mi	7
Sep 14, 1957	EF4	49 km	67.5 mi	2
Apr 2, 1957	EF4	86 km	5.2 mi	2
May 1, 1954	EF4	98 km	59.2 mi	0

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

Wildfire History

20 wildfires (100+ acres) recorded within 100 km. Largest: LOCO-HEALDTON (56,584 acres, 2009).

Year	Name	Acres Burned	Distance
2009	LOCO-HEALDTON	56,584	24 km
1991	ARBUCKLE	29,823	23 km
2021	WINDMILL	28,410	15 km
2009	RATCLIFF CITY-TATUMS	23,099	11 km
2009	BRUSHY MOUNTAIN	18,412	52 km
2006	RINGGOLD	16,382	91 km
2005	UNNAMED	15,416	10 km
2006	RATLIFF CITY	12,435	16 km
2000	UNNAMED	9,943	20 km
2006	BIA EMPIRE	7,544	59 km
2005	SHERWOOD	7,473	95 km
1988	UNNAMED	7,228	28 km
2012	NOBLE	7,037	73 km
2006	BIALOCO	6,843	37 km
2005	MISSION	6,735	98 km
2017	SQUIRREL CREEK	6,463	62 km
2006	VELMA	6,364	30 km
2009	LINDSAY	6,195	55 km
1996	TURNPIKE MVD	5,912	45 km
2005	CALLISBURG	5,797	89 km

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

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	40°F (4°C)	1.5 in	Coldest, Driest
February	44°F (7°C)	1.9 in
March	53°F (12°C)	3.0 in
April	62°F (16°C)	3.4 in
May	69°F (21°C)	5.5 in	Wettest
June	77°F (25°C)	4.2 in
July	83°F (28°C)	2.2 in	Warmest
August	82°F (28°C)	2.3 in
September	74°F (24°C)	4.4 in
October	64°F (18°C)	4.0 in
November	51°F (11°C)	2.5 in
December	43°F (6°C)	1.9 in

Hennepin has a seasonal temperature swing of 43°F / from 40°F in January to 83°F in July. Total annual precipitation is 36.8 inches, with May being the wettest month (5.5") and January the driest (1.5").

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