All Countries
Weather & Climate in Delaware, OK
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Delaware 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 45. The city sits at an elevation of 716 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 | 716 ft (218 m) |
| Area | 0.4 sq mi (1.0 km²) |
| Population Density | 774/sq mi |
| Coordinates | 36.7790°N, 95.6425°W |
| Timezone | America/Chicago |
| County | Nowata County County |
| Nearest Airport | Tulsa International (TUL) 42 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 45.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 40.8 / 100 |
| Social Vulnerability | 89.6 / 100 |
| Community Resilience | 19.6 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Very Low |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Very Low |
| Hail | Very Low |
| Strong Wind | Relatively High |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Low |
| Lightning | Relatively Low |
| 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
822 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 | 121 km | 6 km |
| Jul 14, 2017 | 10 km WSW of Shamrock, Oklahoma | M4.2 | 138 km | 7 km |
| Sep 18, 2015 | 3 km WNW of Cushing, Oklahoma | M4.1 | 136 km | 0 km |
| Sep 25, 2015 | 1 km W of Cushing, Oklahoma | M4.0 | 135 km | 3 km |
| Jun 8, 2016 | 13 km NNW of Pawnee, Oklahoma | M3.9 | 117 km | 7 km |
| Sep 16, 2017 | 10 km WSW of Shamrock, Oklahoma | M3.8 | 138 km | 7 km |
| Sep 24, 2017 | 10 km SSE of Red Rock, Oklahoma | M3.8 | 140 km | 7 km |
| Apr 10, 2014 | 5 km E of Morrison, Oklahoma | M3.7 | 129 km | 8 km |
| Mar 22, 2017 | 8 km SW of Shamrock, Oklahoma | M3.7 | 137 km | 5 km |
| Oct 4, 2016 | 15 km NW of Pawnee, Oklahoma | M3.7 | 122 km | 6 km |
| Sep 16, 2015 | 2 km WSW of Cushing, Oklahoma | M3.7 | 136 km | 4 km |
| Jun 12, 2015 | 6 km N of Maramec, Oklahoma | M3.7 | 106 km | 0 km |
| Mar 24, 2015 | 11 km NW of Morrison, Oklahoma | M3.7 | 139 km | 1 km |
| Sep 9, 2016 | 4 km ENE of Morrison, Oklahoma | M3.7 | 129 km | 7 km |
| Jan 15, 2016 | 6 km S of Ripley, Oklahoma | M3.6 | 146 km | 4 km |
| Jul 21, 2016 | 9 km NW of Morrison, Oklahoma | M3.6 | 138 km | 10 km |
| Nov 22, 2013 | 6 km SSW of Glencoe, Oklahoma | M3.6 | 135 km | 3 km |
| Mar 21, 2015 | 9 km NW of Morrison, Oklahoma | M3.6 | 138 km | 5 km |
| Feb 1, 2014 | 6 km NNW of Agra, Oklahoma | M3.6 | 146 km | 5 km |
| Jul 14, 2017 | 10 km WSW of Shamrock, Oklahoma | M3.6 | 138 km | 7 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
760 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF5. Total: 220 fatalities, 2,487 injuries.
| Date | Rating | Distance | Path | Fatalities |
| May 22, 2011 | EF5 | 98 km | 21.6 mi | 158 |
| May 6, 2024 | EF4 | 81 km | 40.8 mi | 2 |
| May 10, 2008 | EF4 | 51 km | 75.5 mi | 21 |
| May 4, 2003 | EF4 | 86 km | 33.0 mi | 4 |
| Apr 24, 1993 | EF4 | 72 km | 5.5 mi | 7 |
| Apr 26, 1991 | EF4 | 37 km | 4.0 mi | 0 |
| Apr 24, 1975 | EF4 | 95 km | 11.9 mi | 3 |
| Sep 27, 1959 | EF4 | 36 km | 20.4 mi | 1 |
| Apr 3, 1956 | EF4 | 60 km | 41.8 mi | 0 |
| May 25, 2024 | EF3 | 54 km | 23.9 mi | 2 |
| May 22, 2019 | EF3 | 98 km | 9.2 mi | 0 |
| May 22, 2011 | EF3 | 75 km | 17.9 mi | 0 |
| Mar 12, 2006 | EF3 | 90 km | 29.0 mi | 0 |
| Apr 21, 2005 | EF3 | 76 km | 5.0 mi | 0 |
| May 8, 2003 | EF3 | 99 km | 45.0 mi | 0 |
| May 4, 2003 | EF3 | 70 km | 25.0 mi | 5 |
| Apr 19, 2000 | EF3 | 50 km | 34.0 mi | 0 |
| Jun 1, 1999 | EF3 | 97 km | 2.0 mi | 2 |
| Apr 24, 1993 | EF3 | 74 km | 8.0 mi | 0 |
| Jul 2, 1992 | EF3 | 45 km | 4.0 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Wildfire History
20 wildfires (100+ acres) recorded within 100 km. Largest: UNNAMED (51,112 acres, 2014).
| Year | Name | Acres Burned | Distance |
| 2014 | UNNAMED | 51,112 | 15 km |
| 2014 | UNNAMED | 36,112 | 44 km |
| 2014 | UNNAMED | 32,901 | 50 km |
| 2018 | DRUMB | 30,422 | 68 km |
| 2021 | CANDY CREEK | 23,167 | 45 km |
| 2014 | UNNAMED | 20,760 | 83 km |
| 2015 | UNNAMED | 20,347 | 70 km |
| 2004 | UNNAMED | 19,648 | 43 km |
| 2014 | RESERVE | 19,016 | 84 km |
| 2018 | WEST 60 | 18,715 | 75 km |
| 2015 | WOLF CREEK | 18,077 | 13 km |
| 2014 | UNNAMED | 17,075 | 39 km |
| 2023 | HWY 123 | 14,980 | 39 km |
| 2016 | BAR-DEW LAKE | 14,806 | 36 km |
| 2014 | SPIDER | 14,587 | 76 km |
| 2014 | UNNAMED | 14,119 | 44 km |
| 1996 | UNNAMED | 13,265 | 83 km |
| 2023 | NORTH DRUM | 11,618 | 66 km |
| 2023 | ZINK | 11,332 | 69 km |
| 2017 | MILSAP | 10,879 | 78 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 37°F (3°C) | 1.6 in | Coldest, Driest |
| February | 40°F (4°C) | 1.9 in | |
| March | 49°F (10°C) | 3.5 in | |
| April | 59°F (15°C) | 3.7 in | |
| May | 67°F (20°C) | 4.7 in | |
| June | 76°F (24°C) | 4.7 in | |
| July | 82°F (28°C) | 3.0 in | Warmest |
| August | 80°F (27°C) | 3.2 in | |
| September | 72°F (22°C) | 5.0 in | Wettest |
| October | 61°F (16°C) | 3.5 in | |
| November | 48°F (9°C) | 3.3 in | |
| December | 38°F (3°C) | 2.1 in |
Delaware has a seasonal temperature swing of 45°F / from 37°F in January to 82°F in July. Total annual precipitation is 40.1 inches, with September being the wettest month (5.0") and January the driest (1.6").