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Weather & Climate in De Kalb, MO
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
De Kalb 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 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 37.2 inches. The area receives 3.5 inches of snow annually. Air quality is rated Good with a median AQI of 41. The city sits at an elevation of 1,135 feet.
Temperature
26°F Jan (-3°C)
78°F Jul (25°C)
| Annual Average | 53.4°F |
| 1% below US avg | |
| January Average | 26°F (-3°C) |
| July Average | 78°F (25°C) |
| Sunny Days | 268 days/yr |
Geography
| Elevation | 1,135 ft (346 m) |
| Area | 0.3 sq mi (0.6 km²) |
| Population Density | 2,046/sq mi |
| Coordinates | 39.5869°N, 94.9252°W |
| Timezone | America/Chicago |
| Nearest Airport | Kansas City International (MCI) 23 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 41.0 |
| Rating | Good |
Earthquake History
8 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.6.
| Dec 17, 2009 | 2 km NW of Auburn, Nebraska | M3.6 | 121 km | 5 km |
| Jul 16, 2004 | 6 km SSE of Riverton, Iowa | M3.5 | 128 km | 5 km |
| Mar 23, 2007 | 5 km N of Nortonville, Kansas | M3.1 | 38 km | 5 km |
| Feb 11, 1995 | 6 km E of Clearmont, Missouri | M3.1 | 102 km | 5 km |
| May 13, 1999 | 6 km WSW of Kansas City, Kansas | M3.0 | 58 km | 5 km |
| Jan 6, 2014 | 5 km NW of Liberty, Nebraska | M2.9 | 149 km | 5 km |
| Mar 31, 1993 | 2 km SE of Nemaha, Nebraska | M2.9 | 103 km | 5 km |
| Jul 15, 2025 | 3 km W of Hale, Missouri | M2.5 | 132 km | 8 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
602 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 15 fatalities, 465 injuries.
| Date | Rating | Distance | Path | Fatalities |
| May 28, 2019 | EF4 | 92 km | 29.1 mi | 0 |
| May 29, 2004 | EF4 | 66 km | 22.0 mi | 3 |
| May 4, 2003 | EF4 | 55 km | 5.0 mi | 0 |
| May 4, 2003 | EF4 | 58 km | 21.0 mi | 2 |
| May 4, 1977 | EF4 | 68 km | 12.0 mi | 0 |
| May 4, 1977 | EF4 | 85 km | 48.6 mi | 0 |
| Apr 23, 1975 | EF4 | 83 km | 11.4 mi | 1 |
| Jun 8, 1966 | EF4 | 51 km | 19.9 mi | 1 |
| Aug 6, 1962 | EF4 | 74 km | 11.0 mi | 0 |
| May 7, 1961 | EF4 | 46 km | 26.2 mi | 0 |
| May 19, 1960 | EF4 | 99 km | 27.5 mi | 1 |
| May 22, 1952 | EF4 | 72 km | 26.9 mi | 0 |
| May 21, 2019 | EF3 | 94 km | 5.9 mi | 0 |
| Mar 6, 2017 | EF3 | 91 km | 17.7 mi | 0 |
| May 2, 2008 | EF3 | 50 km | 0.9 mi | 0 |
| May 29, 2004 | EF3 | 11 km | 7.0 mi | 0 |
| Apr 26, 1984 | EF3 | 48 km | 32.0 mi | 0 |
| Jun 19, 1981 | EF3 | 75 km | 7.7 mi | 1 |
| May 4, 1977 | EF3 | 96 km | 31.6 mi | 0 |
| Jun 26, 1969 | EF3 | 52 km | 10.1 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Wildfire History
10 wildfires (100+ acres) recorded within 100 km. Largest: 4 DELTA 21 (1,708 acres, 2021).
| Year | Name | Acres Burned | Distance |
| 2021 | 4 DELTA 21 | 1,708 | 90 km |
| 2011 | 182 | 1,575 | 90 km |
| 2018 | FY 18 182 ROAD BROADCAST BURN | 1,009 | 84 km |
| 2020 | MOSQR-FY20-RX-WUI | 964 | 65 km |
| 2012 | HIGHWAY E | 897 | 91 km |
| 2016 | SQR BM SL DESOTO 2016 WUI RX | 866 | 64 km |
| 1988 | NORTH POOL | 698 | 65 km |
| 2020 | UNNAMED | 645 | 63 km |
| 2009 | UNIT 6 | 625 | 62 km |
| 2002 | SCRDGRS 6 | 536 | 62 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 26°F (-3°C) | 1.0 in | Coldest, Driest |
| February | 32°F (0°C) | 1.1 in | |
| March | 43°F (6°C) | 2.4 in | |
| April | 54°F (12°C) | 3.3 in | |
| May | 64°F (18°C) | 5.0 in | Wettest |
| June | 73°F (23°C) | 4.7 in | |
| July | 78°F (25°C) | 4.2 in | Warmest |
| August | 76°F (24°C) | 4.0 in | |
| September | 67°F (20°C) | 4.7 in | |
| October | 56°F (13°C) | 3.2 in | |
| November | 42°F (6°C) | 2.2 in | |
| December | 31°F (-1°C) | 1.5 in |
De Kalb has a seasonal temperature swing of 51°F / from 26°F in January to 78°F in July. Total annual precipitation is 37.2 inches, with May being the wettest month (5.0") and January the driest (1.0").