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Weather & Climate in Calvin, OK
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Calvin enjoys a temperate climate with an average annual temperature of 62°F (16°C). Winters average 40°F in January while summers reach 81°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 751 feet.
Temperature
40°F Jan (5°C)
81°F Jul (27°C)
| Annual Average | 61.5°F |
| 14% above US avg | |
| January Average | 40°F (5°C) |
| July Average | 81°F (27°C) |
| Sunny Days | 318 days/yr |
Geography
| Elevation | 751 ft (229 m) |
| Area | 0.9 sq mi (2.3 km²) |
| Population Density | 416/sq mi |
| Coordinates | 34.9664°N, 96.2499°W |
| Timezone | America/Chicago |
| County | Coal County County |
| Nearest Airport | Ada Regional (ADT) 26 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 45.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 32.4 / 100 |
| Social Vulnerability | 97.7 / 100 |
| Community Resilience | 9.5 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Very Low |
| Earthquake | Very Low |
| Wildfire | Relatively Low |
| Flood | Very Low |
| Hail | Relatively High |
| Strong Wind | Very Low |
| Heat Wave | Relatively Low |
| Winter Weather | Very Low |
| Lightning | Very Low |
| Ice Storm | Relatively Moderate |
| Drought | Relatively Moderate |
| Cold Wave | Relatively Low |
| Landslide | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
2,372 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 | 79 km | 3 km |
| Sep 6, 1997 | 6 km N of Tupelo, Oklahoma | M4.5 | 38 km | 5 km |
| Dec 7, 2013 | 8 km SW of Arcadia, Oklahoma | M4.5 | 125 km | 8 km |
| Aug 19, 2014 | 12 km SSW of Guthrie, Oklahoma | M4.4 | 142 km | 5 km |
| Apr 16, 2013 | Oklahoma | M4.4 | 110 km | 6 km |
| Jun 16, 2014 | 7 km NNE of Lake Aluma, Oklahoma | M4.3 | 125 km | 5 km |
| Jan 13, 2024 | 6 km W of Arcadia, Oklahoma | M4.3 | 130 km | 7 km |
| Jul 14, 2017 | 10 km WSW of Shamrock, Oklahoma | M4.2 | 107 km | 7 km |
| Jan 1, 2016 | 6 km ENE of Edmond, Oklahoma | M4.2 | 131 km | 6 km |
| Apr 7, 2016 | 1 km E of Luther, Oklahoma | M4.2 | 114 km | 6 km |
| Apr 19, 2015 | 6 km W of Langston, Oklahoma | M4.2 | 147 km | 3 km |
| Jan 18, 1995 | 4 km SSE of Erin Springs, Oklahoma | M4.2 | 125 km | 5 km |
| Apr 7, 2014 | 6 km NNW of Meridian, Oklahoma | M4.2 | 139 km | 5 km |
| Apr 16, 2013 | 3 km WSW of Wellston, Oklahoma | M4.2 | 111 km | 7 km |
| Aug 3, 2017 | 6 km ENE of Edmond, Oklahoma | M4.2 | 131 km | 5 km |
| Jan 13, 2024 | 6 km ENE of Edmond, Oklahoma | M4.1 | 131 km | 7 km |
| Jun 18, 2014 | 7 km NE of Lake Aluma, Oklahoma | M4.1 | 125 km | 5 km |
| Feb 9, 2014 | 6 km SSW of Langston, Oklahoma | M4.1 | 140 km | 5 km |
| Apr 27, 2015 | 7 km WSW of Langston, Oklahoma | M4.1 | 144 km | 5 km |
| Feb 27, 2010 | 8 km SE of Sparks, Oklahoma | M4.1 | 80 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
751 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF5. Total: 73 fatalities, 927 injuries.
| Date | Rating | Distance | Path | Fatalities |
| May 5, 1960 | EF5 | 71 km | 71.8 mi | 5 |
| May 11, 1992 | EF4 | 36 km | 10.0 mi | 0 |
| May 17, 1981 | EF4 | 53 km | 33.6 mi | 0 |
| Oct 5, 1970 | EF4 | 74 km | 25.0 mi | 4 |
| Apr 27, 1966 | EF4 | 76 km | 10.2 mi | 0 |
| May 5, 1960 | EF4 | 87 km | 62.4 mi | 16 |
| May 4, 1960 | EF4 | 50 km | 8.0 mi | 0 |
| May 9, 1959 | EF4 | 49 km | 6.2 mi | 7 |
| Sep 14, 1957 | EF4 | 91 km | 67.5 mi | 2 |
| Apr 28, 1950 | EF4 | 19 km | 4.5 mi | 5 |
| Apr 27, 2024 | EF3 | 87 km | 9.9 mi | 1 |
| Apr 27, 2024 | EF3 | 18 km | 27.9 mi | 2 |
| Apr 19, 2023 | EF3 | 84 km | 0.6 mi | 0 |
| May 9, 2016 | EF3 | 73 km | 9.1 mi | 1 |
| May 9, 2016 | EF3 | 93 km | 16.6 mi | 0 |
| Apr 14, 2011 | EF3 | 75 km | 17.0 mi | 2 |
| May 10, 2010 | EF3 | 88 km | 6.5 mi | 0 |
| May 10, 2010 | EF3 | 74 km | 37.2 mi | 0 |
| Jun 1, 1999 | EF3 | 84 km | 4.5 mi | 0 |
| May 3, 1999 | EF3 | 91 km | 16.0 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Wildfire History
20 wildfires (100+ acres) recorded within 100 km. Largest: UNNAMED (27,091 acres, 2004).
| Year | Name | Acres Burned | Distance |
| 2004 | UNNAMED | 27,091 | 25 km |
| 2011 | HOG TRAP | 22,895 | 19 km |
| 2009 | BURNT TRUST | 22,578 | 35 km |
| 2011 | UNNAMED | 17,973 | 58 km |
| 1991 | UNNAMED | 16,700 | 27 km |
| 2005 | CABINESS | 14,646 | 20 km |
| 2004 | UNNAMED | 14,138 | 55 km |
| 2009 | 40 ACRE TURNAROUND | 13,985 | 71 km |
| 2016 | PHAROAH | 13,579 | 65 km |
| 2004 | UNNAMED | 12,163 | 58 km |
| 2011 | UNNAMED | 11,348 | 21 km |
| 2005 | UNNAMED | 10,935 | 69 km |
| 2011 | UNNAMED | 10,444 | 94 km |
| 2005 | WEWOKA CREEK | 9,921 | 23 km |
| 1996 | UNNAMED | 9,481 | 29 km |
| 2011 | TI VALLEY | 9,205 | 70 km |
| 1996 | UNNAMED | 9,165 | 35 km |
| 2007 | EASY TO HANDLE | 9,120 | 61 km |
| 2005 | PROCTOR | 9,044 | 35 km |
| 2005 | BEAR DEN | 9,004 | 42 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 40°F (5°C) | 1.7 in | Coldest, Driest |
| February | 43°F (6°C) | 2.2 in | |
| March | 52°F (11°C) | 3.7 in | |
| April | 61°F (16°C) | 4.3 in | |
| May | 69°F (20°C) | 5.6 in | Wettest |
| June | 76°F (25°C) | 4.3 in | |
| July | 81°F (27°C) | 2.6 in | Warmest |
| August | 81°F (27°C) | 2.8 in | |
| September | 74°F (23°C) | 4.7 in | |
| October | 63°F (17°C) | 4.3 in | |
| November | 51°F (11°C) | 3.3 in | |
| December | 42°F (6°C) | 2.4 in |
Calvin has a seasonal temperature swing of 41°F / from 40°F in January to 81°F in July. Total annual precipitation is 41.8 inches, with May being the wettest month (5.6") and January the driest (1.7").