All Countries
Weather & Climate in Unionville, MO
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Unionville experiences four distinct seasons with an average annual temperature of 51°F (11°C). Winters average 23°F in January while summers reach 76°F in July. The area gets 262 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 41.1 inches. The area receives 5.7 inches of snow annually. Air quality is rated Good with a median AQI of 41. The city sits at an elevation of 1,063 feet.
Temperature
23°F Jan (-5°C)
76°F Jul (24°C)
| Annual Average | 51.0°F |
| 6% below US avg | |
| January Average | 23°F (-5°C) |
| July Average | 76°F (24°C) |
| Sunny Days | 262 days/yr |
Geography
| Elevation | 1,063 ft (324 m) |
| Area | 2.0 sq mi (5.2 km²) |
| Population Density | 863/sq mi |
| Coordinates | 40.4770°N, 93.0033°W |
| Timezone | America/Chicago |
| Nearest Airport | Kirksville Regional (IRK) 36 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 41.0 |
| Rating | Good |
Earthquake History
2 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M2.9.
| Feb 8, 2004 | 6 km SSW of Stoutsville, Missouri | M2.9 | 145 km | 5 km |
| Jul 15, 2025 | 3 km W of Hale, Missouri | M2.5 | 103 km | 8 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
367 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 15 fatalities, 193 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Jun 7, 1984 | EF4 | 87 km | 134.0 mi | 3 |
| Jun 2, 1980 | EF4 | 79 km | 31.2 mi | 0 |
| Apr 23, 1975 | EF4 | 93 km | 28.2 mi | 1 |
| Apr 21, 1973 | EF4 | 49 km | 14.6 mi | 0 |
| Apr 20, 1973 | EF4 | 75 km | 3.8 mi | 1 |
| Apr 21, 1967 | EF4 | 88 km | 59.0 mi | 0 |
| Jan 24, 1967 | EF4 | 41 km | 25.7 mi | 0 |
| May 20, 1959 | EF4 | 28 km | 17.2 mi | 0 |
| May 10, 1953 | EF4 | 52 km | 6.4 mi | 0 |
| Mar 31, 2023 | EF3 | 86 km | 26.1 mi | 0 |
| Mar 5, 2022 | EF3 | 61 km | 11.3 mi | 1 |
| Aug 20, 2019 | EF3 | 97 km | 5.4 mi | 0 |
| May 27, 2019 | EF3 | 88 km | 7.3 mi | 0 |
| Jun 22, 2015 | EF3 | 77 km | 11.1 mi | 0 |
| Apr 8, 1999 | EF3 | 79 km | 39.0 mi | 0 |
| Apr 8, 1999 | EF3 | 58 km | 16.0 mi | 0 |
| May 27, 1995 | EF3 | 85 km | 30.4 mi | 0 |
| Apr 23, 1975 | EF3 | 88 km | 14.0 mi | 0 |
| Apr 13, 1974 | EF3 | 89 km | 0.1 mi | 0 |
| Apr 20, 1973 | EF3 | 81 km | 9.5 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 23°F (-5°C) | 1.7 in | Coldest, Driest |
| February | 29°F (-2°C) | 1.7 in | |
| March | 40°F (4°C) | 3.1 in | |
| April | 52°F (11°C) | 3.9 in | |
| May | 62°F (17°C) | 4.8 in | Wettest |
| June | 71°F (22°C) | 4.5 in | |
| July | 76°F (24°C) | 4.7 in | Warmest |
| August | 74°F (23°C) | 4.0 in | |
| September | 65°F (19°C) | 4.3 in | |
| October | 54°F (12°C) | 3.2 in | |
| November | 40°F (4°C) | 2.9 in | |
| December | 28°F (-2°C) | 2.4 in |
Unionville has a seasonal temperature swing of 53°F / from 23°F in January to 76°F in July. Total annual precipitation is 41.1 inches, with May being the wettest month (4.8") and January the driest (1.7").