Sioux Rapids weather by month
What a typical year looks like in Sioux Rapids, Iowa: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Sioux Rapids, 0 km from Sioux Rapids; records cover 1941–2026.
The year at a glance
- Precipitation a year
- 32 in813 mm
- Snow a year
- 35 in89 cm
- Last spring freeze
- Apr 28
- First fall freeze
- Sep 29
- Heating degree days
- 7,396
- Cooling degree days
- 669
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −13°−25° (heating, 99%) and 92°33° (cooling, 1%).
Month by month
Sioux Rapids in January
Highs average 25°−4° and lows 8°−13°, with 0.62 in16 mm of precipitation and 8 in20 cm of snow in a typical January.
- Record high
- 68°20° (1944)
- Record low
- −32°−36° (1970)
- Heating degree days
- 1496
- Cooling degree days
- 0
Sioux Rapids in February
Highs average 30°−1° and lows 13°−11°, with 0.83 in21 mm of precipitation and 7 in18 cm of snow in a typical February.
- Record high
- 72°22° (2024)
- Record low
- −32°−36° (1972)
- Heating degree days
- 1222
- Cooling degree days
- 0
Sioux Rapids in March
Highs average 43°6° and lows 25°−4°, with 1.8 in45 mm of precipitation and 7 in17 cm of snow in a typical March.
- Record high
- 90°32° (2026)
- Record low
- −29°−34° (1948)
- Heating degree days
- 965
- Cooling degree days
- 0
Sioux Rapids in April
Highs average 58°15° and lows 36°2°, with 3.6 in91 mm of precipitation and 2.3 in5.8 cm of snow in a typical April.
- Record high
- 94°34° (1980)
- Record low
- 3°−16° (1975)
- Heating degree days
- 541
- Cooling degree days
- 4
Sioux Rapids in May
Highs average 70°21° and lows 48°9°, with 4.2 in106 mm of precipitation and 0.3 in0.8 cm of snow in a typical May.
- Record high
- 103°39° (2013)
- Record low
- 23°−5° (1967)
- Heating degree days
- 227
- Cooling degree days
- 44
Sioux Rapids in June
Highs average 80°27° and lows 59°15°, with 5.1 in128 mm of precipitation in a typical June.
- Record high
- 105°41° (1985)
- Record low
- 34°1° (1945)
- Heating degree days
- 31
- Cooling degree days
- 166
Sioux Rapids in July
Highs average 82°28° and lows 62°17°, with 3.3 in84 mm of precipitation in a typical July.
- Record high
- 107°42° (1955)
- Record low
- 41°5° (1971)
- Heating degree days
- 8
- Cooling degree days
- 227
Sioux Rapids in August
Highs average 79°26° and lows 59°15°, with 4.4 in112 mm of precipitation in a typical August.
- Record high
- 105°41° (1947)
- Record low
- 34°1° (1950)
- Heating degree days
- 22
- Cooling degree days
- 154
Sioux Rapids in September
Highs average 74°23° and lows 51°11°, with 3.4 in86 mm of precipitation in a typical September.
- Record high
- 101°38° (1947)
- Record low
- 18°−8° (1942)
- Heating degree days
- 145
- Cooling degree days
- 66
Sioux Rapids in OctoberThis month
Highs average 61°16° and lows 39°4°, with 2.5 in64 mm of precipitation and 0.7 in1.8 cm of snow in a typical October.
- Record high
- 95°35° (1963)
- Record low
- 9°−13° (2020)
- Heating degree days
- 488
- Cooling degree days
- 8
Sioux Rapids in November
Highs average 44°7° and lows 25°−4°, with 1.4 in36 mm of precipitation and 4 in10 cm of snow in a typical November.
- Record high
- 81°27° (1968)
- Record low
- −17°−27° (1959)
- Heating degree days
- 915
- Cooling degree days
- 0
Sioux Rapids in December
Highs average 30°−1° and lows 14°−10°, with 0.94 in24 mm of precipitation and 7 in17 cm of snow in a typical December.
- Record high
- 68°20° (1998)
- Record low
- −27°−33° (1946)
- Heating degree days
- 1336
- Cooling degree days
- 0