St. Joseph weather by month
What a typical year looks like in St. Joseph, 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, 8 km from St. Joseph; 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
St. Joseph 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
St. Joseph 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
St. Joseph 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
St. Joseph 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
St. Joseph 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
St. Joseph 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
St. Joseph 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
St. Joseph 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
St. Joseph 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
St. Joseph 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
St. Joseph 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
St. Joseph 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