Mediapolis weather by month
What a typical year looks like in Mediapolis, Iowa: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Gladstone L/d 18, 18 km from Mediapolis; records cover 1938–2026.
The year at a glance
- Precipitation a year
- 37.2 in945 mm
- Snow a year
- 17 in43 cm
- Last spring freeze
- Apr 9
- First fall freeze
- Oct 27
- Heating degree days
- 5,854
- Cooling degree days
- 1,106
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −5°−20° (heating, 99%) and 94°34° (cooling, 1%).
Month by month
Mediapolis in January
Highs average 32°0° and lows 16°−9°, with 1.4 in35 mm of precipitation and 5 in12 cm of snow in a typical January.
- Record high
- 65°18° (2004)
- Record low
- −26°−32° (2009)
- Heating degree days
- 1269
- Cooling degree days
- 0
Mediapolis in February
Highs average 37°3° and lows 20°−7°, with 1.7 in43 mm of precipitation and 6 in16 cm of snow in a typical February.
- Record high
- 77°25° (2024)
- Record low
- −26°−32° (1996)
- Heating degree days
- 1029
- Cooling degree days
- 0
Mediapolis in March
Highs average 49°9° and lows 30°−1°, with 2.4 in60 mm of precipitation and 1.8 in4.6 cm of snow in a typical March.
- Record high
- 84°29° (2026)
- Record low
- −8°−22° (1948)
- Heating degree days
- 788
- Cooling degree days
- 2
Mediapolis in April
Highs average 62°17° and lows 42°5°, with 3.8 in96 mm of precipitation and 0.3 in0.8 cm of snow in a typical April.
- Record high
- 89°32° (2002)
- Record low
- 18°−8° (2018)
- Heating degree days
- 397
- Cooling degree days
- 8
Mediapolis in May
Highs average 73°23° and lows 53°12°, with 5 in128 mm of precipitation in a typical May.
- Record high
- 98°37° (2018)
- Record low
- 31°−1° (2005)
- Heating degree days
- 138
- Cooling degree days
- 72
Mediapolis in June
Highs average 82°28° and lows 63°17°, with 4.7 in118 mm of precipitation in a typical June.
- Record high
- 98°37° (2012)
- Record low
- 42°6° (1946)
- Heating degree days
- 14
- Cooling degree days
- 242
Mediapolis in July
Highs average 86°30° and lows 67°19°, with 4 in102 mm of precipitation in a typical July.
- Record high
- 105°41° (1938)
- Record low
- 49°9° (1947)
- Heating degree days
- 1
- Cooling degree days
- 348
Mediapolis in August
Highs average 84°29° and lows 65°18°, with 3.6 in91 mm of precipitation in a typical August.
- Record high
- 102°39° (1938)
- Record low
- 47°8° (2012)
- Heating degree days
- 3
- Cooling degree days
- 291
Mediapolis in September
Highs average 78°25° and lows 56°13°, with 3.6 in92 mm of precipitation in a typical September.
- Record high
- 99°37° (2013)
- Record low
- 29°−2° (1942)
- Heating degree days
- 70
- Cooling degree days
- 126
Mediapolis in OctoberThis month
Highs average 65°18° and lows 45°7°, with 2.8 in71 mm of precipitation and 0.1 in0.3 cm of snow in a typical October.
- Record high
- 93°34° (2006)
- Record low
- 18°−8° (1942)
- Heating degree days
- 338
- Cooling degree days
- 17
Mediapolis in November
Highs average 50°10° and lows 33°0°, with 2.5 in62 mm of precipitation and 0.3 in0.8 cm of snow in a typical November.
- Record high
- 80°27° (2000)
- Record low
- 1°−17° (1991)
- Heating degree days
- 714
- Cooling degree days
- 0
Mediapolis in December
Highs average 37°3° and lows 22°−5°, with 1.8 in46 mm of precipitation and 3 in8 cm of snow in a typical December.
- Record high
- 74°23° (2021)
- Record low
- −15°−26° (2000)
- Heating degree days
- 1093
- Cooling degree days
- 0