Grand Mound weather by month
What a typical year looks like in Grand Mound, Iowa: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Davenport Municipal Airport, 24 km from Grand Mound; records cover 1996–2026.
The year at a glance
- Precipitation a year
- 36.2 in919 mm
- Snow a year
- Rare
- Last spring freeze
- Apr 24
- First fall freeze
- Oct 13
- Heating degree days
- 6,326
- Cooling degree days
- 879
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −9°−23° (heating, 99%) and 93°34° (cooling, 1%).
Month by month
Grand Mound in January
Highs average 30°−1° and lows 14°−10°, with 1.1 in29 mm of precipitation in a typical January.
- Record high
- 63°17° (2002)
- Record low
- −28°−33° (2019)
- Heating degree days
- 1334
- Cooling degree days
- 0
Grand Mound in February
Highs average 34°1° and lows 18°−8°, with 1.4 in37 mm of precipitation in a typical February.
- Record high
- 77°25° (2024)
- Record low
- −23°−31° (2014)
- Heating degree days
- 1085
- Cooling degree days
- 0
Grand Mound in March
Highs average 48°9° and lows 29°−2°, with 2.3 in59 mm of precipitation in a typical March.
- Record high
- 86°30° (2026)
- Record low
- −13°−25° (2014)
- Heating degree days
- 819
- Cooling degree days
- 2
Grand Mound in April
Highs average 61°16° and lows 39°4°, with 3.6 in92 mm of precipitation in a typical April.
- Record high
- 88°31° (2002)
- Record low
- 14°−10° (2018)
- Heating degree days
- 447
- Cooling degree days
- 8
Grand Mound in May
Highs average 73°23° and lows 51°11°, with 4.8 in122 mm of precipitation in a typical May.
- Record high
- 97°36° (2022)
- Record low
- 25°−4° (2005)
- Heating degree days
- 170
- Cooling degree days
- 69
Grand Mound in June
Highs average 81°27° and lows 61°16°, with 4.7 in120 mm of precipitation in a typical June.
- Record high
- 96°36° (2022)
- Record low
- 43°6° (2004)
- Heating degree days
- 18
- Cooling degree days
- 201
Grand Mound in July
Highs average 84°29° and lows 64°18°, with 4.1 in103 mm of precipitation in a typical July.
- Record high
- 100°38° (2012)
- Record low
- 46°8° (1996)
- Heating degree days
- 4
- Cooling degree days
- 274
Grand Mound in August
Highs average 82°28° and lows 62°16°, with 4 in101 mm of precipitation in a typical August.
- Record high
- 100°38° (2023)
- Record low
- 42°6° (2004)
- Heating degree days
- 8
- Cooling degree days
- 217
Grand Mound in September
Highs average 76°25° and lows 53°12°, with 3.5 in88 mm of precipitation in a typical September.
- Record high
- 97°36° (2013)
- Record low
- 31°−1° (2003)
- Heating degree days
- 104
- Cooling degree days
- 92
Grand Mound in OctoberThis month
Highs average 63°17° and lows 42°5°, with 2.7 in69 mm of precipitation in a typical October.
- Record high
- 93°34° (2006)
- Record low
- 20°−7° (1997)
- Heating degree days
- 402
- Cooling degree days
- 16
Grand Mound in November
Highs average 48°9° and lows 30°−1°, with 2.3 in57 mm of precipitation in a typical November.
- Record high
- 79°26° (2000)
- Record low
- −6°−21° (2019)
- Heating degree days
- 776
- Cooling degree days
- 0
Grand Mound in December
Highs average 35°2° and lows 20°−7°, with 1.6 in42 mm of precipitation in a typical December.
- Record high
- 73°23° (2021)
- Record low
- −18°−28° (2000)
- Heating degree days
- 1159
- Cooling degree days
- 0