Peosta weather by month
What a typical year looks like in Peosta, Iowa: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Dubuque Regional Airport, 12 km from Peosta; records cover 1874–2026.
The year at a glance
- Precipitation a year
- 38.2 in970 mm
- Snow a year
- 43 in108 cm
- Last spring freeze
- Apr 29
- First fall freeze
- Oct 9
- Heating degree days
- 7,083
- Cooling degree days
- 637
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −10°−23° (heating, 99%) and 91°33° (cooling, 1%).
Month by month
Peosta in January
Highs average 27°−3° and lows 11°−12°, with 1.3 in34 mm of precipitation and 11 in27 cm of snow in a typical January.
- Record high
- 63°17° (1897)
- Record low
- −32°−36° (1887)
- Heating degree days
- 1432
- Cooling degree days
- 0
Peosta in February
Highs average 31°−1° and lows 15°−9°, with 1.6 in40 mm of precipitation and 11 in27 cm of snow in a typical February.
- Record high
- 72°22° (2024)
- Record low
- −31°−35° (1875)
- Heating degree days
- 1177
- Cooling degree days
- 0
Peosta in March
Highs average 44°7° and lows 26°−3°, with 2.3 in57 mm of precipitation and 6 in14 cm of snow in a typical March.
- Record high
- 86°30° (1895)
- Record low
- −20°−29° (1962)
- Heating degree days
- 924
- Cooling degree days
- 0
Peosta in April
Highs average 58°14° and lows 37°3°, with 4.1 in103 mm of precipitation and 1.9 in4.8 cm of snow in a typical April.
- Record high
- 93°34° (1980)
- Record low
- 10°−12° (1982)
- Heating degree days
- 529
- Cooling degree days
- 3
Peosta in May
Highs average 69°21° and lows 49°9°, with 4.3 in109 mm of precipitation in a typical May.
- Record high
- 104°40° (1934)
- Record low
- 21°−6° (2005)
- Heating degree days
- 229
- Cooling degree days
- 38
Peosta in June
Highs average 79°26° and lows 59°15°, with 5.2 in132 mm of precipitation in a typical June.
- Record high
- 104°40° (1934)
- Record low
- 36°2° (1972)
- Heating degree days
- 37
- Cooling degree days
- 143
Peosta in July
Highs average 82°28° and lows 62°17°, with 4.8 in122 mm of precipitation in a typical July.
- Record high
- 110°43° (1936)
- Record low
- 40°4° (1895)
- Heating degree days
- 8
- Cooling degree days
- 217
Peosta in August
Highs average 80°26° and lows 60°16°, with 4 in100 mm of precipitation in a typical August.
- Record high
- 107°42° (1936)
- Record low
- 40°4° (1915)
- Heating degree days
- 18
- Cooling degree days
- 166
Peosta in September
Highs average 73°23° and lows 52°11°, with 3.8 in97 mm of precipitation in a typical September.
- Record high
- 99°37° (1922)
- Record low
- 24°−4° (1899)
- Heating degree days
- 142
- Cooling degree days
- 63
Peosta in OctoberThis month
Highs average 60°16° and lows 40°4°, with 2.9 in74 mm of precipitation and 0.5 in1.3 cm of snow in a typical October.
- Record high
- 90°32° (1997)
- Record low
- 10°−12° (1925)
- Heating degree days
- 475
- Cooling degree days
- 7
Peosta in November
Highs average 45°7° and lows 28°−2°, with 2.2 in56 mm of precipitation and 2.8 in7.1 cm of snow in a typical November.
- Record high
- 78°26° (1915)
- Record low
- −17°−27° (1977)
- Heating degree days
- 857
- Cooling degree days
- 0
Peosta in December
Highs average 32°0° and lows 17°−8°, with 1.8 in46 mm of precipitation and 10 in26 cm of snow in a typical December.
- Record high
- 69°21° (2021)
- Record low
- −25°−32° (1983)
- Heating degree days
- 1255
- Cooling degree days
- 0