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Weather & Climate in Sumner, MO
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Sumner experiences four distinct seasons with an average annual temperature of 53°F (12°C). Winters average 26°F in January while summers reach 78°F in July. The area gets 267 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 38.0 inches. The area receives 4.6 inches of snow annually. Air quality is rated Good with a median AQI of 41. The city sits at an elevation of 689 feet.
Temperature
26°F Jan (-3°C)
78°F Jul (25°C)
| Annual Average | 53.3°F |
| 1% below US avg | |
| January Average | 26°F (-3°C) |
| July Average | 78°F (25°C) |
| Sunny Days | 267 days/yr |
Geography
| Elevation | 689 ft (210 m) |
| Area | 0.2 sq mi (0.6 km²) |
| Population Density | 300/sq mi |
| Coordinates | 39.6545°N, 93.2443°W |
| Timezone | America/Chicago |
| Nearest Airport | Kirksville Regional (IRK) 48 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.
| May 18, 2005 | Missouri | M3.3 | 147 km | 5 km |
| Jul 31, 2005 | Missouri | M3.3 | 113 km | 5 km |
| May 13, 1999 | 6 km WSW of Kansas City, Kansas | M3.0 | 140 km | 5 km |
| Feb 8, 2004 | 6 km SSW of Stoutsville, Missouri | M2.9 | 118 km | 5 km |
| Jul 15, 2025 | 3 km W of Hale, Missouri | M2.5 | 14 km | 8 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
331 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 14 fatalities, 118 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Mar 12, 2006 | EF4 | 94 km | 29.0 mi | 0 |
| May 29, 2004 | EF4 | 90 km | 22.0 mi | 3 |
| May 4, 1977 | EF4 | 75 km | 48.6 mi | 0 |
| Apr 23, 1975 | EF4 | 62 km | 11.4 mi | 1 |
| Apr 23, 1975 | EF4 | 49 km | 28.2 mi | 1 |
| Apr 21, 1973 | EF4 | 80 km | 14.6 mi | 0 |
| Apr 20, 1973 | EF4 | 72 km | 3.8 mi | 1 |
| Jun 12, 1970 | EF4 | 33 km | 16.1 mi | 0 |
| Apr 21, 1967 | EF4 | 8 km | 59.0 mi | 0 |
| Mar 12, 2006 | EF3 | 67 km | 35.0 mi | 0 |
| Mar 12, 2006 | EF3 | 75 km | 19.7 mi | 4 |
| Jul 4, 1995 | EF3 | 75 km | 26.0 mi | 0 |
| May 4, 1977 | EF3 | 93 km | 26.2 mi | 1 |
| Apr 23, 1975 | EF3 | 12 km | 14.0 mi | 0 |
| Apr 13, 1974 | EF3 | 88 km | 0.1 mi | 0 |
| May 5, 1971 | EF3 | 13 km | 3.8 mi | 0 |
| May 5, 1971 | EF3 | 24 km | 0.1 mi | 0 |
| Jun 12, 1970 | EF3 | 66 km | 8.5 mi | 0 |
| Apr 21, 1967 | EF3 | 50 km | 14.6 mi | 0 |
| Mar 14, 1955 | EF3 | 86 km | 9.8 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 | 54 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 26°F (-3°C) | 1.4 in | Coldest |
| February | 32°F (-0°C) | 1.2 in | Driest |
| March | 43°F (6°C) | 2.6 in | |
| April | 54°F (12°C) | 3.6 in | |
| May | 64°F (18°C) | 4.7 in | Wettest |
| June | 73°F (23°C) | 4.3 in | |
| July | 78°F (25°C) | 3.9 in | Warmest |
| August | 75°F (24°C) | 3.8 in | |
| September | 67°F (20°C) | 4.5 in | |
| October | 56°F (13°C) | 3.5 in | |
| November | 42°F (6°C) | 2.6 in | |
| December | 31°F (-1°C) | 1.9 in |
Sumner has a seasonal temperature swing of 52°F / from 26°F in January to 78°F in July. Total annual precipitation is 38.0 inches, with May being the wettest month (4.7") and February the driest (1.2").