Green Park weather by month
What a typical year looks like in Green Park, Missouri: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at ST CHARLES 7 SSW, 24 km from Green Park; records cover 1975–2026.
The year at a glance
- Precipitation a year
- 42.3 in1075 mm
- Snow a year
- 8 in21 cm
- Last spring freeze
- Apr 8
- First fall freeze
- Oct 25
- Heating degree days
- 4,676
- Cooling degree days
- 1,528
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 2°−17° (heating, 99%) and 97°36° (cooling, 1%).
Month by month
Green Park in January
Highs average 40°5° and lows 22°−6°, with 2.6 in65 mm of precipitation and 4 in11 cm of snow in a typical January.
- Record high
- 75°24° (1986)
- Record low
- −18°−28° (1985)
- Heating degree days
- 1052
- Cooling degree days
- 0
Green Park in February
Highs average 46°8° and lows 25°−4°, with 2.2 in56 mm of precipitation and 1.1 in2.8 cm of snow in a typical February.
- Record high
- 84°29° (2024)
- Record low
- −18°−28° (1996)
- Heating degree days
- 828
- Cooling degree days
- 0
Green Park in March
Highs average 56°13° and lows 35°1°, with 3.6 in91 mm of precipitation and 0.3 in0.8 cm of snow in a typical March.
- Record high
- 93°34° (2026)
- Record low
- −8°−22° (1978)
- Heating degree days
- 624
- Cooling degree days
- 5
Green Park in April
Highs average 67°20° and lows 46°8°, with 4.6 in117 mm of precipitation in a typical April.
- Record high
- 92°33° (1986)
- Record low
- 20°−7° (1987)
- Heating degree days
- 290
- Cooling degree days
- 32
Green Park in May
Highs average 77°25° and lows 56°14°, with 5.2 in133 mm of precipitation in a typical May.
- Record high
- 98°37° (2012)
- Record low
- 30°−1° (1992)
- Heating degree days
- 83
- Cooling degree days
- 132
Green Park in June
Highs average 85°30° and lows 65°19°, with 4.3 in109 mm of precipitation in a typical June.
- Record high
- 105°41° (2012)
- Record low
- 41°5° (1993)
- Heating degree days
- 8
- Cooling degree days
- 314
Green Park in July
Highs average 89°32° and lows 69°21°, with 3.9 in98 mm of precipitation in a typical July.
- Record high
- 106°41° (1980)
- Record low
- 50°10° (1996)
- Heating degree days
- 0
- Cooling degree days
- 434
Green Park in August
Highs average 88°31° and lows 67°19°, with 3.5 in90 mm of precipitation in a typical August.
- Record high
- 106°41° (1984)
- Record low
- 43°6° (1992)
- Heating degree days
- 2
- Cooling degree days
- 383
Green Park in September
Highs average 81°27° and lows 58°15°, with 3.3 in84 mm of precipitation in a typical September.
- Record high
- 101°38° (1984)
- Record low
- 29°−2° (1995)
- Heating degree days
- 45
- Cooling degree days
- 185
Green Park in OctoberThis month
Highs average 70°21° and lows 46°8°, with 3.2 in81 mm of precipitation in a typical October.
- Record high
- 94°34° (2006)
- Record low
- 22°−6° (1980)
- Heating degree days
- 258
- Cooling degree days
- 40
Green Park in November
Highs average 56°13° and lows 36°2°, with 3.5 in88 mm of precipitation and 0.4 in1 cm of snow in a typical November.
- Record high
- 85°29° (1987)
- Record low
- −2°−19° (1991)
- Heating degree days
- 578
- Cooling degree days
- 3
Green Park in December
Highs average 45°7° and lows 27°−3°, with 2.5 in65 mm of precipitation and 2.1 in5.3 cm of snow in a typical December.
- Record high
- 77°25° (2025)
- Record low
- −20°−29° (1989)
- Heating degree days
- 908
- Cooling degree days
- 0