Wood River weather by month
What a typical year looks like in Wood River, Illinois: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at ALTON - MELVIN PRICE L&D, 6 km from Wood River; records cover 1943–2026.
The year at a glance
- Precipitation a year
- 41.9 in1063 mm
- Snow a year
- Rare
- Last spring freeze
- Mar 28
- First fall freeze
- Nov 12
- Heating degree days
- 4,781
- Cooling degree days
- 1,424
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 4°−16° (heating, 99%) and 97°36° (cooling, 1%).
Month by month
Wood River in January
Highs average 39°4° and lows 22°−6°, with 2.5 in64 mm of precipitation in a typical January.
- Record high
- 77°25° (2008)
- Record low
- −16°−27° (1982)
- Heating degree days
- 1074
- Cooling degree days
- 0
Wood River in February
Highs average 44°7° and lows 25°−4°, with 2.5 in64 mm of precipitation in a typical February.
- Record high
- 80°27° (2024)
- Record low
- −15°−26° (1996)
- Heating degree days
- 855
- Cooling degree days
- 0
Wood River in March
Highs average 54°12° and lows 35°2°, with 3.5 in88 mm of precipitation in a typical March.
- Record high
- 89°32° (1945)
- Record low
- −1°−18° (1960)
- Heating degree days
- 651
- Cooling degree days
- 3
Wood River in April
Highs average 66°19° and lows 45°7°, with 4.9 in125 mm of precipitation in a typical April.
- Record high
- 102°39° (1946)
- Record low
- 20°−7° (1982)
- Heating degree days
- 303
- Cooling degree days
- 22
Wood River in May
Highs average 75°24° and lows 56°13°, with 5.5 in139 mm of precipitation in a typical May.
- Record high
- 98°37° (1944)
- Record low
- 32°0° (1966)
- Heating degree days
- 91
- Cooling degree days
- 108
Wood River in June
Highs average 84°29° and lows 66°19°, with 3.4 in86 mm of precipitation in a typical June.
- Record high
- 107°42° (1952)
- Record low
- 44°7° (1945)
- Heating degree days
- 8
- Cooling degree days
- 297
Wood River in July
Highs average 87°31° and lows 69°21°, with 4 in100 mm of precipitation in a typical July.
- Record high
- 116°47° (1946)
- Record low
- 50°10° (1972)
- Heating degree days
- 0
- Cooling degree days
- 412
Wood River in August
Highs average 86°30° and lows 67°20°, with 3.3 in84 mm of precipitation in a typical August.
- Record high
- 106°41° (1948)
- Record low
- 46°8° (1986)
- Heating degree days
- 1
- Cooling degree days
- 362
Wood River in September
Highs average 80°27° and lows 60°15°, with 3.4 in86 mm of precipitation in a typical September.
- Record high
- 103°39° (1954)
- Record low
- 37°3° (1949)
- Heating degree days
- 35
- Cooling degree days
- 184
Wood River in OctoberThis month
Highs average 68°20° and lows 48°9°, with 2.9 in74 mm of precipitation in a typical October.
- Record high
- 98°37° (1945)
- Record low
- 25°−4° (1952)
- Heating degree days
- 252
- Cooling degree days
- 34
Wood River in November
Highs average 54°12° and lows 37°3°, with 3.4 in87 mm of precipitation in a typical November.
- Record high
- 88°31° (1945)
- Record low
- 4°−16° (1964)
- Heating degree days
- 590
- Cooling degree days
- 2
Wood River in December
Highs average 44°6° and lows 27°−3°, with 2.6 in66 mm of precipitation in a typical December.
- Record high
- 74°23° (2012)
- Record low
- −16°−27° (1983)
- Heating degree days
- 921
- Cooling degree days
- 0