Morris weather by month
What a typical year looks like in Morris, Illinois: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at MORRIS 1NW, 1 km from Morris; records cover 1912–2026.
The year at a glance
- Precipitation a year
- 38.8 in985 mm
- Snow a year
- 25 in63 cm
- Last spring freeze
- Apr 21
- First fall freeze
- Oct 18
- Heating degree days
- 6,141
- Cooling degree days
- 994
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −6°−21° (heating, 99%) and 94°34° (cooling, 1%).
Month by month
Morris in January
Highs average 31°0° and lows 16°−9°, with 2.1 in53 mm of precipitation and 7 in19 cm of snow in a typical January.
- Record high
- 68°20° (1950)
- Record low
- −23°−31° (1927)
- Heating degree days
- 1288
- Cooling degree days
- 0
Morris in February
Highs average 36°2° and lows 19°−7°, with 1.8 in45 mm of precipitation and 8 in19 cm of snow in a typical February.
- Record high
- 74°23° (2024)
- Record low
- −22°−30° (1933)
- Heating degree days
- 1051
- Cooling degree days
- 0
Morris in March
Highs average 48°9° and lows 29°−2°, with 2.2 in57 mm of precipitation and 2.9 in7.4 cm of snow in a typical March.
- Record high
- 85°29° (2012)
- Record low
- −19°−28° (1943)
- Heating degree days
- 830
- Cooling degree days
- 2
Morris in April
Highs average 61°16° and lows 40°4°, with 3.3 in85 mm of precipitation and 0.5 in1.3 cm of snow in a typical April.
- Record high
- 93°34° (1930)
- Record low
- 12°−11° (1920)
- Heating degree days
- 451
- Cooling degree days
- 8
Morris in May
Highs average 72°22° and lows 51°11°, with 4.4 in112 mm of precipitation in a typical May.
- Record high
- 103°39° (1934)
- Record low
- 24°−4° (1932)
- Heating degree days
- 180
- Cooling degree days
- 74
Morris in June
Highs average 82°28° and lows 61°16°, with 4.7 in120 mm of precipitation in a typical June.
- Record high
- 106°41° (1934)
- Record low
- 34°1° (1956)
- Heating degree days
- 25
- Cooling degree days
- 218
Morris in July
Highs average 85°29° and lows 65°18°, with 4.9 in125 mm of precipitation in a typical July.
- Record high
- 109°43° (1936)
- Record low
- 41°5° (1940)
- Heating degree days
- 3
- Cooling degree days
- 312
Morris in August
Highs average 83°28° and lows 63°17°, with 4 in102 mm of precipitation in a typical August.
- Record high
- 107°42° (1934)
- Record low
- 34°1° (1946)
- Heating degree days
- 6
- Cooling degree days
- 249
Morris in September
Highs average 77°25° and lows 55°13°, with 3.6 in90 mm of precipitation in a typical September.
- Record high
- 103°39° (1922)
- Record low
- 26°−3° (1942)
- Heating degree days
- 82
- Cooling degree days
- 114
Morris in OctoberThis month
Highs average 64°18° and lows 43°6°, with 3.2 in82 mm of precipitation in a typical October.
- Record high
- 95°35° (1963)
- Record low
- 12°−11° (1925)
- Heating degree days
- 371
- Cooling degree days
- 17
Morris in November
Highs average 49°9° and lows 32°0°, with 2.5 in64 mm of precipitation and 1.1 in2.8 cm of snow in a typical November.
- Record high
- 82°28° (1950)
- Record low
- −9°−23° (1947)
- Heating degree days
- 741
- Cooling degree days
- 0
Morris in December
Highs average 37°3° and lows 22°−6°, with 2 in51 mm of precipitation and 5 in13 cm of snow in a typical December.
- Record high
- 72°22° (2012)
- Record low
- −26°−32° (1924)
- Heating degree days
- 1113
- Cooling degree days
- 0