Hills weather by month
What a typical year looks like in Hills, Iowa: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at IOWA CITY MUNICIPAL AP, 9 km from Hills; records cover 1948–2026.
The year at a glance
- Precipitation a year
- 35.7 in906 mm
- Snow a year
- Rare
- Last spring freeze
- Apr 25
- First fall freeze
- Oct 15
- Heating degree days
- 6,115
- Cooling degree days
- 1,044
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 95°35° (cooling, 1%).
Month by month
Hills in January
Highs average 31°−1° and lows 15°−10°, with 1 in26 mm of precipitation in a typical January.
- Record high
- 65°18° (2003)
- Record low
- −28°−33° (1996)
- Heating degree days
- 1310
- Cooling degree days
- 0
Hills in February
Highs average 36°2° and lows 19°−7°, with 1.2 in31 mm of precipitation in a typical February.
- Record high
- 77°25° (2017)
- Record low
- −34°−37° (1996)
- Heating degree days
- 1064
- Cooling degree days
- 0
Hills in March
Highs average 50°10° and lows 30°−1°, with 2.2 in56 mm of precipitation in a typical March.
- Record high
- 91°33° (2026)
- Record low
- −16°−27° (1948)
- Heating degree days
- 792
- Cooling degree days
- 2
Hills in April
Highs average 63°17° and lows 40°5°, with 3.8 in96 mm of precipitation in a typical April.
- Record high
- 92°33° (1952)
- Record low
- 15°−9° (2018)
- Heating degree days
- 416
- Cooling degree days
- 6
Hills in May
Highs average 73°23° and lows 52°11°, with 4.5 in114 mm of precipitation in a typical May.
- Record high
- 98°37° (2018)
- Record low
- 24°−4° (2005)
- Heating degree days
- 149
- Cooling degree days
- 73
Hills in June
Highs average 83°28° and lows 62°17°, with 5.3 in134 mm of precipitation in a typical June.
- Record high
- 99°37° (2012)
- Record low
- 41°5° (1950)
- Heating degree days
- 13
- Cooling degree days
- 233
Hills in July
Highs average 86°30° and lows 66°19°, with 3.9 in99 mm of precipitation in a typical July.
- Record high
- 105°41° (2012)
- Record low
- 46°8° (1997)
- Heating degree days
- 2
- Cooling degree days
- 336
Hills in August
Highs average 84°29° and lows 63°17°, with 3.9 in100 mm of precipitation in a typical August.
- Record high
- 101°38° (2003)
- Record low
- 40°4° (1950)
- Heating degree days
- 4
- Cooling degree days
- 269
Hills in September
Highs average 78°25° and lows 54°12°, with 3.2 in82 mm of precipitation in a typical September.
- Record high
- 101°38° (2013)
- Record low
- 26°−3° (1995)
- Heating degree days
- 84
- Cooling degree days
- 110
Hills in OctoberThis month
Highs average 64°18° and lows 42°6°, with 3 in76 mm of precipitation in a typical October.
- Record high
- 93°34° (2006)
- Record low
- 11°−12° (1952)
- Heating degree days
- 384
- Cooling degree days
- 15
Hills in November
Highs average 49°10° and lows 30°−1°, with 2.2 in55 mm of precipitation in a typical November.
- Record high
- 79°26° (2000)
- Record low
- −3°−19° (1950)
- Heating degree days
- 756
- Cooling degree days
- 0
Hills in December
Highs average 36°2° and lows 20°−7°, with 1.5 in37 mm of precipitation in a typical December.
- Record high
- 75°24° (2021)
- Record low
- −19°−28° (1951)
- Heating degree days
- 1141
- Cooling degree days
- 0