Long Creek weather by month
What a typical year looks like in Long Creek, Illinois: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at DECATUR WTP, 9 km from Long Creek; records cover 1893–2026.
The year at a glance
- Precipitation a year
- 40.4 in1027 mm
- Snow a year
- 14 in35 cm
- Last spring freeze
- Apr 12
- First fall freeze
- Oct 18
- Heating degree days
- 5,444
- Cooling degree days
- 1,116
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 0°−18° (heating, 99%) and 95°35° (cooling, 1%).
Month by month
Long Creek in January
Highs average 34°1° and lows 20°−7°, with 2.4 in61 mm of precipitation and 6 in15 cm of snow in a typical January.
- Record high
- 73°23° (1909)
- Record low
- −23°−31° (1977)
- Heating degree days
- 1182
- Cooling degree days
- 0
Long Creek in February
Highs average 39°4° and lows 24°−5°, with 2 in51 mm of precipitation and 2.5 in6.4 cm of snow in a typical February.
- Record high
- 76°24° (1972)
- Record low
- −25°−32° (1905)
- Heating degree days
- 944
- Cooling degree days
- 0
Long Creek in March
Highs average 51°10° and lows 33°0°, with 2.6 in67 mm of precipitation and 0.9 in2.3 cm of snow in a typical March.
- Record high
- 89°32° (1929)
- Record low
- −10°−23° (1978)
- Heating degree days
- 721
- Cooling degree days
- 2
Long Creek in April
Highs average 63°17° and lows 43°6°, with 4.1 in105 mm of precipitation and 0.4 in1 cm of snow in a typical April.
- Record high
- 94°34° (1894)
- Record low
- 15°−9° (1920)
- Heating degree days
- 362
- Cooling degree days
- 12
Long Creek in May
Highs average 74°23° and lows 54°12°, with 5 in126 mm of precipitation in a typical May.
- Record high
- 101°38° (1934)
- Record low
- 25°−4° (1895)
- Heating degree days
- 128
- Cooling degree days
- 86
Long Creek in June
Highs average 82°28° and lows 63°17°, with 4.7 in120 mm of precipitation in a typical June.
- Record high
- 105°41° (1931)
- Record low
- 32°0° (1894)
- Heating degree days
- 12
- Cooling degree days
- 241
Long Creek in July
Highs average 85°29° and lows 67°19°, with 4 in102 mm of precipitation in a typical July.
- Record high
- 113°45° (1954)
- Record low
- 45°7° (1904)
- Heating degree days
- 1
- Cooling degree days
- 330
Long Creek in August
Highs average 84°29° and lows 65°18°, with 3.5 in89 mm of precipitation in a typical August.
- Record high
- 106°41° (1934)
- Record low
- 35°2° (1986)
- Heating degree days
- 3
- Cooling degree days
- 288
Long Creek in September
Highs average 78°25° and lows 57°14°, with 3.1 in78 mm of precipitation in a typical September.
- Record high
- 104°40° (1954)
- Record low
- 20°−7° (1899)
- Heating degree days
- 64
- Cooling degree days
- 135
Long Creek in OctoberThis month
Highs average 65°19° and lows 46°8°, with 3.4 in87 mm of precipitation in a typical October.
- Record high
- 96°36° (1953)
- Record low
- 12°−11° (1925)
- Heating degree days
- 316
- Cooling degree days
- 21
Long Creek in November
Highs average 50°10° and lows 34°1°, with 3.2 in82 mm of precipitation and 0.4 in1 cm of snow in a typical November.
- Record high
- 83°28° (1933)
- Record low
- −3°−19° (1929)
- Heating degree days
- 682
- Cooling degree days
- 1
Long Creek in December
Highs average 39°4° and lows 25°−4°, with 2.4 in61 mm of precipitation and 4 in9 cm of snow in a typical December.
- Record high
- 72°22° (1970)
- Record low
- −22°−30° (1983)
- Heating degree days
- 1029
- Cooling degree days
- 0