Coggon weather by month
What a typical year looks like in Coggon, Iowa: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Manchester #2, 23 km from Coggon; records cover 1976–2026.
The year at a glance
- Precipitation a year
- 38.6 in980 mm
- Snow a year
- 35 in88 cm
- Last spring freeze
- May 4
- First fall freeze
- Oct 4
- Heating degree days
- 7,393
- Cooling degree days
- 616
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −14°−26° (heating, 99%) and 92°33° (cooling, 1%).
Month by month
Coggon in January
Highs average 26°−3° and lows 8°−13°, with 1.1 in29 mm of precipitation and 9 in23 cm of snow in a typical January.
- Record high
- 61°16° (2002)
- Record low
- −36°−38° (2009)
- Heating degree days
- 1483
- Cooling degree days
- 0
Coggon in February
Highs average 31°−1° and lows 12°−11°, with 1.4 in34 mm of precipitation and 9 in22 cm of snow in a typical February.
- Record high
- 72°22° (2024)
- Record low
- −34°−37° (2019)
- Heating degree days
- 1224
- Cooling degree days
- 0
Coggon in March
Highs average 44°7° and lows 24°−5°, with 2.1 in53 mm of precipitation and 4 in11 cm of snow in a typical March.
- Record high
- 87°31° (1986)
- Record low
- −22°−30° (2015)
- Heating degree days
- 969
- Cooling degree days
- 0
Coggon in April
Highs average 58°14° and lows 35°2°, with 3.8 in97 mm of precipitation and 1.4 in3.6 cm of snow in a typical April.
- Record high
- 97°36° (1980)
- Record low
- −9°−23° (1982)
- Heating degree days
- 564
- Cooling degree days
- 3
Coggon in May
Highs average 70°21° and lows 47°8°, with 4.5 in114 mm of precipitation in a typical May.
- Record high
- 95°35° (2018)
- Record low
- 19°−7° (2005)
- Heating degree days
- 247
- Cooling degree days
- 37
Coggon in June
Highs average 79°26° and lows 58°14°, with 6 in153 mm of precipitation in a typical June.
- Record high
- 101°38° (1988)
- Record low
- 35°2° (1993)
- Heating degree days
- 41
- Cooling degree days
- 141
Coggon in July
Highs average 82°28° and lows 61°16°, with 4.8 in122 mm of precipitation in a typical July.
- Record high
- 102°39° (2012)
- Record low
- 42°6° (1984)
- Heating degree days
- 11
- Cooling degree days
- 214
Coggon in August
Highs average 80°27° and lows 58°15°, with 4.1 in105 mm of precipitation in a typical August.
- Record high
- 102°39° (1988)
- Record low
- 38°3° (2004)
- Heating degree days
- 25
- Cooling degree days
- 157
Coggon in September
Highs average 74°23° and lows 49°9°, with 3.8 in98 mm of precipitation in a typical September.
- Record high
- 97°36° (2023)
- Record low
- 23°−5° (1984)
- Heating degree days
- 161
- Cooling degree days
- 57
Coggon in OctoberThis month
Highs average 61°16° and lows 37°3°, with 3.1 in79 mm of precipitation and 0.4 in1 cm of snow in a typical October.
- Record high
- 93°34° (1997)
- Record low
- 11°−12° (1988)
- Heating degree days
- 497
- Cooling degree days
- 7
Coggon in November
Highs average 45°7° and lows 26°−4°, with 2.2 in56 mm of precipitation and 2.3 in5.8 cm of snow in a typical November.
- Record high
- 79°26° (1999)
- Record low
- −16°−27° (1977)
- Heating degree days
- 888
- Cooling degree days
- 0
Coggon in December
Highs average 32°0° and lows 15°−9°, with 1.6 in40 mm of precipitation and 9 in22 cm of snow in a typical December.
- Record high
- 70°21° (2021)
- Record low
- −26°−32° (1985)
- Heating degree days
- 1283
- Cooling degree days
- 0