All Countries
Weather & Climate in Chillicothe, MO
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Chillicothe experiences four distinct seasons with an average annual temperature of 53°F (12°C). Winters average 25°F in January while summers reach 78°F in July. The area gets 268 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 37.3 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 797 feet.
Temperature
25°F Jan (-4°C)
78°F Jul (25°C)
| Annual Average | 53.0°F |
| 2% below US avg | |
| January Average | 25°F (-4°C) |
| July Average | 78°F (25°C) |
| Sunny Days | 268 days/yr |
Geography
| Elevation | 797 ft (243 m) |
| Area | 7.1 sq mi (18.5 km²) |
| Population Density | 1,280/sq mi |
| Coordinates | 39.7953°N, 93.5524°W |
| Timezone | America/Chicago |
| Nearest Airport | Kirksville Regional (IRK) 57 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 41.0 |
| Rating | Good |
Earthquake History
5 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.3.
| Jul 31, 2005 | Missouri | M3.3 | 139 km | 5 km |
| Feb 11, 1995 | 6 km E of Clearmont, Missouri | M3.1 | 143 km | 5 km |
| May 13, 1999 | 6 km WSW of Kansas City, Kansas | M3.0 | 125 km | 5 km |
| Feb 8, 2004 | 6 km SSW of Stoutsville, Missouri | M2.9 | 147 km | 5 km |
| Jul 15, 2025 | 3 km W of Hale, Missouri | M2.5 | 26 km | 8 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
357 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 15 fatalities, 192 injuries.
| Date | Rating | Distance | Path | Fatalities |
| May 29, 2004 | EF4 | 60 km | 22.0 mi | 3 |
| Jun 7, 1984 | EF4 | 81 km | 134.0 mi | 3 |
| Jun 2, 1980 | EF4 | 97 km | 31.2 mi | 0 |
| May 4, 1977 | EF4 | 65 km | 48.6 mi | 0 |
| May 4, 1977 | EF4 | 91 km | 12.0 mi | 0 |
| Apr 23, 1975 | EF4 | 77 km | 28.2 mi | 1 |
| Apr 23, 1975 | EF4 | 37 km | 11.4 mi | 1 |
| Apr 21, 1973 | EF4 | 60 km | 14.6 mi | 0 |
| Apr 20, 1973 | EF4 | 93 km | 3.8 mi | 1 |
| Jun 12, 1970 | EF4 | 64 km | 16.1 mi | 0 |
| Apr 21, 1967 | EF4 | 34 km | 59.0 mi | 0 |
| May 2, 2008 | EF3 | 98 km | 0.9 mi | 0 |
| Mar 12, 2006 | EF3 | 88 km | 35.0 mi | 0 |
| Apr 11, 2001 | EF3 | 95 km | 76.5 mi | 0 |
| May 27, 1995 | EF3 | 94 km | 30.4 mi | 0 |
| May 4, 1977 | EF3 | 94 km | 26.2 mi | 1 |
| Apr 23, 1975 | EF3 | 19 km | 14.0 mi | 0 |
| May 5, 1971 | EF3 | 50 km | 0.1 mi | 0 |
| May 5, 1971 | EF3 | 43 km | 3.8 mi | 0 |
| Jun 12, 1970 | EF3 | 92 km | 8.5 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Wildfire History
1 wildfire (100+ acres) recorded within 100 km. Largest: HIGHWAY E (897 acres, 2012).
| Year | Name | Acres Burned | Distance |
| 2012 | HIGHWAY E | 897 | 39 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 25°F (-4°C) | 1.5 in | Coldest |
| February | 31°F (-0°C) | 1.1 in | Driest |
| March | 42°F (6°C) | 2.7 in | |
| April | 54°F (12°C) | 3.7 in | |
| May | 64°F (18°C) | 4.4 in | |
| June | 73°F (23°C) | 4.3 in | |
| July | 78°F (25°C) | 3.9 in | Warmest |
| August | 75°F (24°C) | 3.9 in | |
| September | 67°F (20°C) | 4.8 in | Wettest |
| October | 56°F (13°C) | 3.3 in | |
| November | 42°F (5°C) | 2.1 in | |
| December | 30°F (-1°C) | 1.6 in |
Chillicothe has a seasonal temperature swing of 52°F / from 25°F in January to 78°F in July. Total annual precipitation is 37.3 inches, with September being the wettest month (4.8") and February the driest (1.1").