Weather & Climate in Dewey, OK

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

Dewey enjoys a temperate climate with an average annual temperature of 60°F (16°C). Winters average 37°F in January while summers reach 82°F in July. The area gets 318 sunny days per year, well above the U.S. average of 205 / making it one of the sunnier locations in the country. Air quality is rated Good with a median AQI of 47. 60% of days have good air quality. The city sits at an elevation of 691 feet.

Temperature

37°F Jan (3°C) 82°F Jul (28°C)

Annual Average	60.1°F
	11% above US avg
January Average	37°F (3°C)
July Average	82°F (28°C)
Sunny Days	318 days/yr

Geography

Elevation	691 ft (211 m)
Area	2.8 sq mi (7.3 km²)
Population Density	1,255/sq mi
Coordinates	36.7904°N, 95.9337°W
Timezone	America/Chicago
County	Washington County County
Nearest Airport	Tulsa International (TUL) 41 miles away

Precipitation & Snow

Wettest Month (May) 4.84"

Driest Month (Jan) 1.46"

Air Quality

AQI Median	47.0
Rating	Good
Good Days %	60.4%
Unhealthy Days	6

Natural Hazard Risk

Overall Risk	Relatively Low
Risk Score	76.1 / 100
Social Vulnerability	54.7 / 100
Community Resilience	59.4 / 100

Hazard Breakdown

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

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

Earthquake History

1,586 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M5.8.

Sep 3, 2016	14 km NW of Pawnee, Oklahoma	M5.8	98 km	6 km
Jun 21, 2020	9 km NW of Perry, Oklahoma	M4.2	136 km	8 km
Jan 27, 2015	3 km SE of Perry, Oklahoma	M4.2	133 km	3 km
Jul 14, 2017	10 km WSW of Shamrock, Oklahoma	M4.2	123 km	7 km
Mar 29, 2017	8 km W of Deer Creek, Oklahoma	M4.1	149 km	3 km
Sep 18, 2015	3 km WNW of Cushing, Oklahoma	M4.1	118 km	0 km
Apr 6, 2023	4 km ESE of Carney, Oklahoma	M4.0	145 km	7 km
Sep 25, 2015	1 km W of Cushing, Oklahoma	M4.0	118 km	3 km
Jan 16, 2019	4 km ENE of South Haven, Kansas	M4.0	130 km	5 km
Feb 7, 2015	3 km SSE of Perry, Oklahoma	M3.9	134 km	5 km
Jun 8, 2016	13 km NNW of Pawnee, Oklahoma	M3.9	94 km	7 km
Sep 16, 2017	10 km WSW of Shamrock, Oklahoma	M3.8	123 km	7 km
Apr 19, 2014	3 km ESE of Perry, Oklahoma	M3.8	131 km	4 km
Sep 24, 2017	10 km SSE of Red Rock, Oklahoma	M3.8	116 km	7 km
Jun 16, 2021	3 km SE of Carney, Oklahoma	M3.7	146 km	7 km
Jul 11, 2015	8 km NW of Perkins, Oklahoma	M3.7	135 km	4 km
Oct 4, 2016	15 km NW of Pawnee, Oklahoma	M3.7	98 km	6 km
Feb 6, 2016	5 km ENE of Coyle, Oklahoma	M3.7	144 km	7 km
Jan 4, 2014	5 km ESE of Orlando, Oklahoma	M3.7	144 km	5 km
Jun 22, 2020	6 km N of Nardin, Oklahoma	M3.7	134 km	5 km

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

Tornado History

752 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 59 fatalities, 1,365 injuries.

Date	Rating	Distance	Path	Fatalities
May 6, 2024	EF4	64 km	40.8 mi	2
May 10, 2008	EF4	74 km	75.5 mi	21
Apr 24, 1993	EF4	72 km	5.5 mi	7
Apr 26, 1991	EF4	42 km	4.0 mi	0
Apr 26, 1991	EF4	87 km	32.0 mi	1
Apr 26, 1984	EF4	99 km	22.0 mi	3
Sep 27, 1959	EF4	61 km	20.4 mi	1
Apr 3, 1956	EF4	86 km	41.8 mi	0
Apr 2, 1956	EF4	92 km	108.3 mi	2
May 25, 2024	EF3	56 km	23.9 mi	2
May 22, 2011	EF3	99 km	17.9 mi	0
Apr 21, 2005	EF3	87 km	5.0 mi	0
May 8, 2003	EF3	74 km	45.0 mi	0
May 4, 2003	EF3	93 km	25.0 mi	5
Apr 19, 2000	EF3	59 km	34.0 mi	0
Apr 24, 1993	EF3	74 km	8.0 mi	0
Jul 2, 1992	EF3	44 km	4.0 mi	0
Apr 26, 1991	EF3	87 km	14.0 mi	1
Mar 26, 1991	EF3	89 km	15.0 mi	0
Mar 15, 1982	EF3	27 km	6.0 mi	1

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

Wildfire History

20 wildfires (100+ acres) recorded within 100 km. Largest: FREEDOM HILL (57,116 acres, 2012).

Year	Name	Acres Burned	Distance
2012	FREEDOM HILL	57,116	93 km
2014	UNNAMED	51,112	13 km
2014	UNNAMED	36,112	22 km
2014	UNNAMED	32,901	24 km
2018	DRUMB	30,422	49 km
2021	CANDY CREEK	23,167	28 km
2014	UNNAMED	20,760	76 km
2015	UNNAMED	20,347	45 km
2004	UNNAMED	19,648	20 km
2014	RESERVE	19,016	61 km
2018	WEST 60	18,715	49 km
2015	WOLF CREEK	18,077	15 km
2014	UNNAMED	17,075	14 km
2023	HWY 123	14,980	18 km
2016	BAR-DEW LAKE	14,806	10 km
2014	SPIDER	14,587	52 km
2014	UNNAMED	14,119	34 km
2016	FERGUSON RANCH	13,625	93 km
1996	UNNAMED	13,265	76 km
2023	NORTH DRUM	11,618	46 km

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

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	37°F (3°C)	1.5 in	Coldest, Driest
February	40°F (4°C)	1.9 in
March	50°F (10°C)	3.5 in
April	59°F (15°C)	3.9 in
May	68°F (20°C)	4.8 in	Wettest
June	76°F (25°C)	4.7 in
July	82°F (28°C)	3.1 in	Warmest
August	80°F (27°C)	3.1 in
September	72°F (22°C)	4.8 in
October	61°F (16°C)	3.6 in
November	48°F (9°C)	3.2 in
December	38°F (3°C)	2.1 in

Dewey has a seasonal temperature swing of 45°F / from 37°F in January to 82°F in July. Total annual precipitation is 39.8 inches, with May being the wettest month (4.8") and January the driest (1.5").

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