Morning Sun weather by month
What a typical year looks like in Morning Sun, Iowa: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Columbus Junction, 22 km from Morning Sun; records cover 1900–2026.
The year at a glance
- Precipitation a year
- 38.8 in986 mm
- Snow a year
- 31 in80 cm
- Last spring freeze
- Apr 22
- First fall freeze
- Oct 12
- Heating degree days
- 6,662
- Cooling degree days
- 789
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −7°−22° (heating, 99%) and 94°34° (cooling, 1%).
Month by month
Morning Sun in January
Highs average 30°−1° and lows 11°−12°, with 1.2 in30 mm of precipitation and 10 in24 cm of snow in a typical January.
- Record high
- 68°20° (1989)
- Record low
- −26°−32° (1930)
- Heating degree days
- 1382
- Cooling degree days
- 0
Morning Sun in February
Highs average 34°1° and lows 14°−10°, with 1.9 in49 mm of precipitation and 7 in18 cm of snow in a typical February.
- Record high
- 77°25° (2024)
- Record low
- −34°−37° (1905)
- Heating degree days
- 1144
- Cooling degree days
- 0
Morning Sun in March
Highs average 48°9° and lows 26°−3°, with 2.3 in59 mm of precipitation and 5 in13 cm of snow in a typical March.
- Record high
- 89°32° (2026)
- Record low
- −17°−27° (1962)
- Heating degree days
- 871
- Cooling degree days
- 0
Morning Sun in April
Highs average 62°16° and lows 38°3°, with 3.9 in98 mm of precipitation and 1.6 in4.1 cm of snow in a typical April.
- Record high
- 93°34° (1930)
- Record low
- 8°−13° (1982)
- Heating degree days
- 466
- Cooling degree days
- 6
Morning Sun in May
Highs average 72°22° and lows 50°10°, with 5.4 in137 mm of precipitation in a typical May.
- Record high
- 103°39° (1934)
- Record low
- 25°−4° (2005)
- Heating degree days
- 187
- Cooling degree days
- 48
Morning Sun in June
Highs average 80°27° and lows 59°15°, with 4.9 in125 mm of precipitation in a typical June.
- Record high
- 106°41° (1936)
- Record low
- 30°−1° (1902)
- Heating degree days
- 30
- Cooling degree days
- 169
Morning Sun in July
Highs average 84°29° and lows 63°17°, with 4.1 in104 mm of precipitation in a typical July.
- Record high
- 110°43° (1936)
- Record low
- 43°6° (1972)
- Heating degree days
- 3
- Cooling degree days
- 263
Morning Sun in August
Highs average 82°28° and lows 61°16°, with 4.2 in107 mm of precipitation in a typical August.
- Record high
- 106°41° (1930)
- Record low
- 39°4° (1986)
- Heating degree days
- 9
- Cooling degree days
- 212
Morning Sun in September
Highs average 76°25° and lows 52°11°, with 3.8 in95 mm of precipitation in a typical September.
- Record high
- 101°38° (1953)
- Record low
- 23°−5° (1942)
- Heating degree days
- 115
- Cooling degree days
- 82
Morning Sun in OctoberThis month
Highs average 63°17° and lows 40°4°, with 3 in77 mm of precipitation and 0.2 in0.5 cm of snow in a typical October.
- Record high
- 96°36° (1963)
- Record low
- 6°−14° (1925)
- Heating degree days
- 431
- Cooling degree days
- 9
Morning Sun in November
Highs average 48°9° and lows 27°−3°, with 2.2 in56 mm of precipitation and 1.3 in3.3 cm of snow in a typical November.
- Record high
- 81°27° (1933)
- Record low
- −8°−22° (1976)
- Heating degree days
- 821
- Cooling degree days
- 0
Morning Sun in December
Highs average 35°2° and lows 17°−8°, with 1.9 in49 mm of precipitation and 6 in16 cm of snow in a typical December.
- Record high
- 74°23° (2021)
- Record low
- −24°−31° (1989)
- Heating degree days
- 1203
- Cooling degree days
- 0