Blue Grass weather by month
What a typical year looks like in Blue Grass, Iowa: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Moline Quad City International Airport, 21 km from Blue Grass; records cover 1874–2026.
The year at a glance
- Precipitation a year
- 38.3 in972 mm
- Snow a year
- 36 in92 cm
- Last spring freeze
- Apr 23
- First fall freeze
- Oct 15
- Heating degree days
- 6,024
- Cooling degree days
- 1,042
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
Blue Grass in January
Highs average 32°0° and lows 15°−10°, with 1.7 in42 mm of precipitation and 11 in27 cm of snow in a typical January.
- Record high
- 69°21° (1989)
- Record low
- −33°−36° (2019)
- Heating degree days
- 1292
- Cooling degree days
- 0
Blue Grass in February
Highs average 37°3° and lows 19°−7°, with 1.8 in46 mm of precipitation and 9 in22 cm of snow in a typical February.
- Record high
- 79°26° (2024)
- Record low
- −28°−33° (1996)
- Heating degree days
- 1044
- Cooling degree days
- 0
Blue Grass in March
Highs average 50°10° and lows 30°−1°, with 2.6 in67 mm of precipitation and 4 in11 cm of snow in a typical March.
- Record high
- 88°31° (1986)
- Record low
- −19°−28° (1960)
- Heating degree days
- 785
- Cooling degree days
- 2
Blue Grass in April
Highs average 63°17° and lows 40°4°, with 3.8 in97 mm of precipitation and 1.1 in2.8 cm of snow in a typical April.
- Record high
- 93°34° (1986)
- Record low
- 7°−14° (1982)
- Heating degree days
- 417
- Cooling degree days
- 11
Blue Grass in May
Highs average 74°23° and lows 51°11°, with 4.7 in119 mm of precipitation in a typical May.
- Record high
- 104°40° (1934)
- Record low
- 25°−4° (2005)
- Heating degree days
- 153
- Cooling degree days
- 76
Blue Grass in June
Highs average 83°28° and lows 61°16°, with 5 in127 mm of precipitation in a typical June.
- Record high
- 104°40° (1931)
- Record low
- 39°4° (1889)
- Heating degree days
- 16
- Cooling degree days
- 228
Blue Grass in July
Highs average 86°30° and lows 65°18°, with 4.2 in107 mm of precipitation in a typical July.
- Record high
- 111°44° (1936)
- Record low
- 46°8° (1945)
- Heating degree days
- 2
- Cooling degree days
- 327
Blue Grass in August
Highs average 84°29° and lows 63°17°, with 4 in101 mm of precipitation in a typical August.
- Record high
- 106°41° (1936)
- Record low
- 40°4° (1915)
- Heating degree days
- 4
- Cooling degree days
- 264
Blue Grass in September
Highs average 78°26° and lows 54°12°, with 3.3 in84 mm of precipitation in a typical September.
- Record high
- 100°38° (1922)
- Record low
- 24°−4° (1942)
- Heating degree days
- 84
- Cooling degree days
- 116
Blue Grass in OctoberThis month
Highs average 65°18° and lows 43°6°, with 2.8 in71 mm of precipitation and 0.3 in0.8 cm of snow in a typical October.
- Record high
- 95°35° (2006)
- Record low
- 11°−12° (1925)
- Heating degree days
- 368
- Cooling degree days
- 17
Blue Grass in November
Highs average 50°10° and lows 31°−1°, with 2.3 in58 mm of precipitation and 2.1 in5.3 cm of snow in a typical November.
- Record high
- 80°27° (1933)
- Record low
- −10°−23° (1891)
- Heating degree days
- 740
- Cooling degree days
- 1
Blue Grass in December
Highs average 37°3° and lows 21°−6°, with 2 in52 mm of precipitation and 9 in22 cm of snow in a typical December.
- Record high
- 75°24° (2021)
- Record low
- −24°−31° (1989)
- Heating degree days
- 1119
- Cooling degree days
- 0