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Weather & Climate in Oskaloosa, KS
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Oskaloosa experiences four distinct seasons with an average annual temperature of 55°F (13°C). Winters average 28°F in January while summers reach 79°F in July. The area gets 302 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 38.3 inches. The area receives 16.4 inches of snow annually, a moderate snowfall amount. Air quality is rated Good with a median AQI of 39. The city sits at an elevation of 1,116 feet.
Temperature
28°F Jan (-2°C)
79°F Jul (26°C)
| Annual Average | 54.5°F |
| 1% above US avg | |
| January Average | 28°F (-2°C) |
| July Average | 79°F (26°C) |
| Sunny Days | 302 days/yr |
Geography
| Elevation | 1,116 ft (340 m) |
| Area | 1.0 sq mi (2.6 km²) |
| Population Density | 1,184/sq mi |
| Coordinates | 39.2160°N, 95.3147°W |
| Timezone | America/Chicago |
| County | Jefferson County County |
| Nearest Airport | Lawrence Regional (LWC) 15 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 39.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 19.7 / 100 |
| Social Vulnerability | 10.6 / 100 |
| Community Resilience | 87.2 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | No Rating |
| Earthquake | Very Low |
| Wildfire | Relatively Low |
| Flood | Very Low |
| Hail | Relatively Low |
| Strong Wind | Relatively Low |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Low |
| Lightning | Relatively Moderate |
| Ice Storm | Relatively Moderate |
| Drought | Relatively Low |
| Cold Wave | Relatively Low |
| Landslide | Relatively Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
9 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.8.
| Sep 16, 2019 | 15 km NW of Elmdale, Kansas | M3.8 | 148 km | 5 km |
| Dec 17, 2009 | 2 km NW of Auburn, Nebraska | M3.6 | 140 km | 5 km |
| May 18, 2005 | Missouri | M3.3 | 144 km | 5 km |
| Mar 23, 2007 | 5 km N of Nortonville, Kansas | M3.1 | 28 km | 5 km |
| Feb 11, 1995 | 6 km E of Clearmont, Missouri | M3.1 | 147 km | 5 km |
| May 13, 1999 | 6 km WSW of Kansas City, Kansas | M3.0 | 55 km | 5 km |
| Jan 6, 2014 | 5 km NW of Liberty, Nebraska | M2.9 | 144 km | 5 km |
| Mar 31, 1993 | 2 km SE of Nemaha, Nebraska | M2.9 | 126 km | 5 km |
| Jan 24, 2023 | Kansas | M2.5 | 149 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
663 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF5. Total: 94 fatalities, 1,202 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Jun 8, 1966 | EF5 | 62 km | 21.1 mi | 16 |
| May 20, 1957 | EF5 | 87 km | 69.4 mi | 44 |
| May 28, 2019 | EF4 | 42 km | 29.1 mi | 0 |
| May 4, 2003 | EF4 | 72 km | 5.0 mi | 0 |
| May 4, 2003 | EF4 | 45 km | 21.0 mi | 2 |
| May 4, 1977 | EF4 | 87 km | 12.0 mi | 0 |
| Jun 8, 1966 | EF4 | 13 km | 19.9 mi | 1 |
| Aug 6, 1962 | EF4 | 52 km | 11.0 mi | 0 |
| May 7, 1961 | EF4 | 34 km | 26.2 mi | 0 |
| May 19, 1960 | EF4 | 88 km | 20.6 mi | 0 |
| May 19, 1960 | EF4 | 55 km | 27.5 mi | 1 |
| May 22, 1952 | EF4 | 28 km | 26.9 mi | 0 |
| Apr 30, 2024 | EF3 | 99 km | 2.2 mi | 1 |
| May 21, 2019 | EF3 | 95 km | 5.9 mi | 0 |
| Mar 6, 2017 | EF3 | 97 km | 17.7 mi | 0 |
| May 28, 2013 | EF3 | 86 km | 4.4 mi | 0 |
| May 21, 2011 | EF3 | 99 km | 10.1 mi | 1 |
| May 2, 2008 | EF3 | 72 km | 0.9 mi | 0 |
| May 29, 2004 | EF3 | 54 km | 7.0 mi | 0 |
| May 8, 2003 | EF3 | 80 km | 25.0 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Wildfire History
20 wildfires (100+ acres) recorded within 100 km. Largest: WAGSTAFF (16,111 acres, 2023).
| Year | Name | Acres Burned | Distance |
| 2023 | WAGSTAFF | 16,111 | 94 km |
| 1988 | UNNAMED | 15,512 | 90 km |
| 2023 | SMITH HILLS | 8,445 | 98 km |
| 2005 | OAKS | 5,673 | 74 km |
| 2017 | WARREN ROAD | 5,037 | 67 km |
| 2022 | ILLINOIS CREEK | 5,008 | 96 km |
| 1995 | UNNAMED | 3,244 | 73 km |
| 2004 | KRAUSE | 3,012 | 75 km |
| 2020 | BOURBONAIS CREEK | 2,803 | 59 km |
| 2021 | 345 | 2,430 | 59 km |
| 2021 | 400 AND ROAD L | 2,393 | 92 km |
| 2015 | UNNAMED | 2,377 | 98 km |
| 1988 | UNNAMED | 2,186 | 82 km |
| 1996 | UNNAMED | 2,010 | 88 km |
| 2021 | 4 DELTA 21 | 1,708 | 56 km |
| 2011 | 182 | 1,575 | 58 km |
| 1996 | UNNAMED | 1,575 | 60 km |
| 1994 | UNNAMED | 1,408 | 64 km |
| 1991 | UNNAMED | 1,194 | 84 km |
| 1994 | UNNAMED | 1,097 | 75 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 28°F (-2°C) | 1.0 in | Coldest, Driest |
| February | 33°F (0°C) | 1.1 in | |
| March | 43°F (6°C) | 2.6 in | |
| April | 54°F (12°C) | 3.4 in | |
| May | 64°F (18°C) | 5.3 in | |
| June | 73°F (23°C) | 5.4 in | Wettest |
| July | 79°F (26°C) | 4.2 in | Warmest |
| August | 76°F (25°C) | 3.9 in | |
| September | 68°F (20°C) | 4.8 in | |
| October | 56°F (14°C) | 3.4 in | |
| November | 42°F (6°C) | 2.2 in | |
| December | 32°F (-0°C) | 1.5 in |
Oskaloosa has a seasonal temperature swing of 51°F / from 28°F in January to 79°F in July. Total annual precipitation is 38.8 inches, with June being the wettest month (5.4") and January the driest (1.0").