Portage Des Sioux weather by month
What a typical year looks like in Portage Des Sioux, Missouri: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at St. Louis Lambert International Airport, 20 km from Portage Des Sioux; records cover 1874–2026.
The year at a glance
- Precipitation a year
- 41.7 in1059 mm
- Snow a year
- 17 in42 cm
- Last spring freeze
- Apr 2
- First fall freeze
- Nov 1
- Heating degree days
- 4,433
- Cooling degree days
- 1,713
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 6°−14° (heating, 99%) and 99°37° (cooling, 1%).
Month by month
Portage Des Sioux in January
Highs average 40°5° and lows 24°−5°, with 2.6 in66 mm of precipitation and 6 in14 cm of snow in a typical January.
- Record high
- 77°25° (1950)
- Record low
- −22°−30° (1884)
- Heating degree days
- 1020
- Cooling degree days
- 0
Portage Des Sioux in February
Highs average 46°8° and lows 28°−2°, with 2.2 in57 mm of precipitation and 4 in11 cm of snow in a typical February.
- Record high
- 86°30° (2024)
- Record low
- −18°−28° (1905)
- Heating degree days
- 793
- Cooling degree days
- 1
Portage Des Sioux in March
Highs average 57°14° and lows 37°3°, with 3.5 in89 mm of precipitation and 2.3 in5.8 cm of snow in a typical March.
- Record high
- 93°34° (2026)
- Record low
- −5°−21° (1960)
- Heating degree days
- 576
- Cooling degree days
- 7
Portage Des Sioux in April
Highs average 68°20° and lows 47°8°, with 4.7 in120 mm of precipitation and 0.2 in0.5 cm of snow in a typical April.
- Record high
- 93°34° (1930)
- Record low
- 20°−7° (1936)
- Heating degree days
- 262
- Cooling degree days
- 37
Portage Des Sioux in May
Highs average 77°25° and lows 58°14°, with 4.8 in122 mm of precipitation in a typical May.
- Record high
- 98°37° (1934)
- Record low
- 31°−1° (1966)
- Heating degree days
- 72
- Cooling degree days
- 150
Portage Des Sioux in June
Highs average 86°30° and lows 67°20°, with 4.5 in114 mm of precipitation in a typical June.
- Record high
- 108°42° (2012)
- Record low
- 43°6° (1969)
- Heating degree days
- 4
- Cooling degree days
- 351
Portage Des Sioux in July
Highs average 90°32° and lows 71°22°, with 3.9 in100 mm of precipitation in a typical July.
- Record high
- 115°46° (1954)
- Record low
- 51°11° (1962)
- Heating degree days
- 0
- Cooling degree days
- 476
Portage Des Sioux in August
Highs average 88°31° and lows 69°21°, with 3.4 in86 mm of precipitation in a typical August.
- Record high
- 110°43° (1934)
- Record low
- 47°8° (1965)
- Heating degree days
- 1
- Cooling degree days
- 428
Portage Des Sioux in September
Highs average 81°27° and lows 61°16°, with 3 in75 mm of precipitation in a typical September.
- Record high
- 104°40° (1954)
- Record low
- 32°0° (1942)
- Heating degree days
- 32
- Cooling degree days
- 212
Portage Des Sioux in OctoberThis month
Highs average 69°21° and lows 49°10°, with 3.2 in80 mm of precipitation in a typical October.
- Record high
- 94°34° (1953)
- Record low
- 21°−6° (1925)
- Heating degree days
- 229
- Cooling degree days
- 48
Portage Des Sioux in November
Highs average 56°13° and lows 37°3°, with 3.4 in87 mm of precipitation and 0.9 in2.3 cm of snow in a typical November.
- Record high
- 86°30° (1937)
- Record low
- 1°−17° (1964)
- Heating degree days
- 560
- Cooling degree days
- 3
Portage Des Sioux in December
Highs average 45°7° and lows 29°−2°, with 2.5 in64 mm of precipitation and 3 in8 cm of snow in a typical December.
- Record high
- 78°26° (2025)
- Record low
- −16°−27° (1989)
- Heating degree days
- 884
- Cooling degree days
- 0