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Weather & Climate in Onton, KY

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

Onton enjoys a temperate climate with an average annual temperature of 57°F (14°C). Winters average 34°F in January while summers reach 78°F in July. The area gets 305 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 45.6 inches. The area receives 4.3 inches of snow annually. Air quality is rated Good with a median AQI of 41. The city sits at an elevation of 393 feet.

Temperature

34°F Jan (1°C) 78°F Jul (25°C)
Annual Average57.2°F
6% above US avg
January Average34°F (1°C)
July Average78°F (25°C)
Sunny Days305 days/yr

Geography

Elevation393 ft (120 m)
Area0.8 sq mi (2.1 km²)
Population Density136/sq mi
Coordinates37.5614°N, 87.4393°W
TimezoneAmerica/New_York
CountyMcLean County County
Nearest AirportOwensboro/Daviess County Regional (OWB)
19 miles away

Precipitation & Snow

Annual Rainfall 45.6"
20% above US avg
Snowfall 4.3"
Wettest Month (Mar) 4.72"
Driest Month (Oct) 2.87"

Air Quality

AQI Median41.0
RatingGood

Natural Hazard Risk

Overall RiskVery Low
Risk Score40.7 / 100
Social Vulnerability78.4 / 100
Community Resilience51.6 / 100

Hazard Breakdown

Tornado Relatively Low
Hurricane Very Low
Earthquake Relatively Low
Wildfire Very Low
Flood Relatively Low
Hail Relatively Low
Strong Wind Relatively Moderate
Heat Wave Relatively Low
Winter Weather Relatively Low
Lightning Very Low
Ice Storm Relatively High
Drought Relatively Moderate
Cold Wave Very Low
Landslide Very Low
Source: FEMA National Risk Index v1.20 (Dec 2025)

Earthquake History

67 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M5.2.

Apr 18, 2008 7 km NNE of Bellmont, Illinois M5.2 106 km 14 km
Apr 18, 2008 9 km NNE of Bellmont, Illinois M4.7 107 km 15 km
Jun 18, 2002 6 km SW of Parkers Settlement, Indiana M4.6 56 km 16 km
Apr 21, 2008 7 km NNE of Bellmont, Illinois M4.0 106 km 18 km
Jan 24, 1990 6 km WNW of Alton, Indiana M3.9 105 km 10 km
Dec 7, 2000 7 km W of Evansville, Indiana M3.9 49 km 5 km
Sep 19, 2017 4 km N of Bellmont, Illinois M3.8 104 km 12 km
Jan 27, 1990 6 km N of Alton, Indiana M3.8 112 km 5 km
Apr 25, 2008 8 km NNE of Bellmont, Illinois M3.7 106 km 13 km
Jan 2, 2006 3 km NNE of Eldorado, Illinois M3.6 92 km 7 km
Nov 20, 2012 7 km N of Bellmont, Illinois M3.6 107 km 19 km
May 1, 2016 5 km SE of New Grand Chain, Illinois M3.5 142 km 16 km
Sep 26, 1994 4 km ENE of Blandville, Kentucky M3.4 147 km 13 km
May 30, 2015 4 km ENE of Geff, Illinois M3.4 128 km 26 km
Jun 5, 2008 8 km WNW of Mount Carmel, Illinois M3.4 105 km 16 km
May 1, 2008 8 km NNE of Bellmont, Illinois M3.3 106 km 14 km
May 2, 2003 10 km ENE of Thompsonville, Illinois M3.2 117 km 0 km
Jan 23, 1991 3 km WSW of Logan, Illinois M3.1 133 km 1 km
May 10, 2012 0 km NW of Emison, Indiana M3.1 139 km 11 km
Aug 26, 2003 5 km WSW of Brookport, Illinois M3.1 121 km 2 km
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.

Tornado History

492 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF5. Total: 81 fatalities, 982 injuries.

Date Rating Distance Path Fatalities
Apr 3, 1974 EF5 83 km 68.0 mi 6
Apr 3, 1974 EF5 82 km 32.0 mi 31
Nov 15, 2005 EF4 36 km 15.0 mi 0
Apr 3, 1974 EF4 78 km 14.0 mi 0
Jul 9, 2024 EF3 56 km 5.8 mi 0
May 26, 2024 EF3 75 km 34.1 mi 1
Dec 11, 2021 EF3 86 km 28.0 mi 0
Feb 28, 2017 EF3 87 km 44.1 mi 1
Nov 17, 2013 EF3 47 km 14.1 mi 0
Nov 17, 2013 EF3 46 km 8.2 mi 0
Apr 10, 2009 EF3 49 km 2.0 mi 0
Mar 28, 2009 EF3 33 km 12.4 mi 0
Feb 5, 2008 EF3 48 km 18.1 mi 3
Oct 18, 2007 EF3 33 km 7.0 mi 0
Apr 2, 2006 EF3 76 km 29.7 mi 0
Nov 6, 2005 EF3 42 km 41.3 mi 24
Nov 6, 2005 EF3 56 km 11.2 mi 0
May 11, 2003 EF3 22 km 1.8 mi 0
Apr 28, 2002 EF3 44 km 22.0 mi 0
Jan 3, 2000 EF3 29 km 7.0 mi 0
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).

Wildfire History

20 wildfires (100+ acres) recorded within 100 km. Largest: FRANKLIN CREEK RX (2,828 acres, 2010).

Year Name Acres Burned Distance
2010 FRANKLIN CREEK RX 2,828 99 km
2019 UNNAMED 2,286 98 km
2019 UNNAMED 2,282 100 km
2021 GAP VIEW RX 1,575 91 km
2022 DENNISON HOLLOW RX 1,573 87 km
2007 DEAD DEER 1,557 53 km
2022 ONE HORSE GAP RX 1,502 89 km
2014 UNNAMED 1,493 87 km
2015 UNNAMED 1,447 87 km
2021 BEATTY BRANCH RX 1,396 99 km
2017 UNNAMED 1,336 94 km
2016 UNNAMED 1,299 89 km
2014 UNNAMED 1,216 89 km
2013 UNNAMED 1,203 90 km
2024 LBL - NWDA UNIT 3 RX 1,187 94 km
2013 UNNAMED 1,167 91 km
2019 UNNAMED 1,057 96 km
1999 UNNAMED 1,039 56 km
2021 ROCKY BRANCH RX 1,033 98 km
2015 UNNAMED 1,008 90 km
Source: NIFC/IRWIN Wildfire Records (100+ acres).

Monthly Weather

Month Avg Temperature Precipitation Summary
January 34°F (1°C) 3.2 in Coldest
February 37°F (3°C) 3.6 in
March 47°F (8°C) 4.7 in Wettest
April 57°F (14°C) 4.7 in
May 65°F (19°C) 4.7 in
June 74°F (23°C) 3.5 in
July 78°F (25°C) 4.1 in Warmest
August 76°F (25°C) 3.6 in
September 70°F (21°C) 3.3 in
October 58°F (15°C) 2.9 in Driest
November 47°F (9°C) 4.2 in
December 38°F (3°C) 4.1 in

Onton has a seasonal temperature swing of 43°F / from 34°F in January to 78°F in July. Total annual precipitation is 46.5 inches, with March being the wettest month (4.7") and October the driest (2.9").

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