De Kalb weather by month
What a typical year looks like in De Kalb, Missouri: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at St. Joseph Rosecrans Memorial Airport, 20 km from De Kalb; records cover 1908–2026.
The year at a glance
- Precipitation a year
- 34.8 in883 mm
- Snow a year
- Rare
- Last spring freeze
- Apr 15
- First fall freeze
- Oct 13
- Heating degree days
- 5,385
- Cooling degree days
- 1,287
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −3°−19° (heating, 99%) and 98°37° (cooling, 1%).
Month by month
De Kalb in January
Highs average 37°3° and lows 17°−8°, with 0.71 in18 mm of precipitation in a typical January.
- Record high
- 73°23° (2003)
- Record low
- −25°−32° (1974)
- Heating degree days
- 1170
- Cooling degree days
- 0
De Kalb in February
Highs average 43°6° and lows 21°−6°, with 0.95 in24 mm of precipitation in a typical February.
- Record high
- 83°28° (1930)
- Record low
- −23°−31° (1979)
- Heating degree days
- 924
- Cooling degree days
- 0
De Kalb in March
Highs average 55°13° and lows 32°0°, with 2.1 in52 mm of precipitation in a typical March.
- Record high
- 98°37° (1908)
- Record low
- −13°−25° (1978)
- Heating degree days
- 676
- Cooling degree days
- 3
De Kalb in April
Highs average 66°19° and lows 42°5°, with 3.7 in94 mm of precipitation in a typical April.
- Record high
- 96°36° (1970)
- Record low
- 2°−17° (1975)
- Heating degree days
- 352
- Cooling degree days
- 18
De Kalb in May
Highs average 76°24° and lows 54°12°, with 4.9 in124 mm of precipitation in a typical May.
- Record high
- 103°39° (1934)
- Record low
- 29°−2° (2005)
- Heating degree days
- 113
- Cooling degree days
- 105
De Kalb in June
Highs average 85°29° and lows 64°18°, with 4.8 in121 mm of precipitation in a typical June.
- Record high
- 105°41° (1936)
- Record low
- 41°5° (1982)
- Heating degree days
- 7
- Cooling degree days
- 284
De Kalb in July
Highs average 88°31° and lows 67°20°, with 4.7 in120 mm of precipitation in a typical July.
- Record high
- 108°42° (1934)
- Record low
- 41°5° (1972)
- Heating degree days
- 1
- Cooling degree days
- 394
De Kalb in August
Highs average 86°30° and lows 65°18°, with 3.8 in98 mm of precipitation in a typical August.
- Record high
- 110°43° (1934)
- Record low
- 41°5° (1986)
- Heating degree days
- 3
- Cooling degree days
- 324
De Kalb in September
Highs average 80°27° and lows 54°12°, with 3.2 in81 mm of precipitation in a typical September.
- Record high
- 107°42° (1947)
- Record low
- 30°−1° (1967)
- Heating degree days
- 71
- Cooling degree days
- 133
De Kalb in OctoberThis month
Highs average 68°20° and lows 43°6°, with 2.8 in72 mm of precipitation in a typical October.
- Record high
- 97°36° (1963)
- Record low
- 11°−12° (1925)
- Heating degree days
- 326
- Cooling degree days
- 25
De Kalb in November
Highs average 53°12° and lows 31°−1°, with 1.9 in47 mm of precipitation in a typical November.
- Record high
- 82°28° (1909)
- Record low
- −5°−21° (1991)
- Heating degree days
- 691
- Cooling degree days
- 1
De Kalb in December
Highs average 41°5° and lows 21°−6°, with 1.3 in32 mm of precipitation in a typical December.
- Record high
- 73°23° (2021)
- Record low
- −24°−31° (1989)
- Heating degree days
- 1051
- Cooling degree days
- 0