Jonesboro weather by month
What a typical year looks like in Jonesboro, Illinois: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Anna 4 N, 8 km from Jonesboro; records cover 1887–2026.
The year at a glance
- Precipitation a year
- 51.1 in1299 mm
- Snow a year
- 10 in26 cm
- Last spring freeze
- Apr 11
- First fall freeze
- Oct 23
- Heating degree days
- 3,977
- Cooling degree days
- 1,634
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 7°−14° (heating, 99%) and 97°36° (cooling, 1%).
Month by month
Jonesboro in January
Highs average 45°7° and lows 25°−4°, with 3.5 in90 mm of precipitation and 2.6 in6.6 cm of snow in a typical January.
- Record high
- 76°24° (1909)
- Record low
- −20°−29° (1918)
- Heating degree days
- 920
- Cooling degree days
- 0
Jonesboro in February
Highs average 50°10° and lows 29°−2°, with 3.4 in86 mm of precipitation and 4 in10 cm of snow in a typical February.
- Record high
- 78°26° (1917)
- Record low
- −19°−28° (1899)
- Heating degree days
- 713
- Cooling degree days
- 0
Jonesboro in March
Highs average 61°16° and lows 37°3°, with 4.8 in122 mm of precipitation and 0.9 in2.3 cm of snow in a typical March.
- Record high
- 91°33° (1910)
- Record low
- 0°−18° (1899)
- Heating degree days
- 506
- Cooling degree days
- 7
Jonesboro in April
Highs average 71°22° and lows 46°8°, with 5.6 in143 mm of precipitation in a typical April.
- Record high
- 92°33° (1915)
- Record low
- 20°−7° (2003)
- Heating degree days
- 224
- Cooling degree days
- 41
Jonesboro in May
Highs average 79°26° and lows 56°13°, with 5.9 in151 mm of precipitation in a typical May.
- Record high
- 98°37° (1911)
- Record low
- 31°−1° (1903)
- Heating degree days
- 62
- Cooling degree days
- 142
Jonesboro in June
Highs average 87°31° and lows 65°18°, with 5 in126 mm of precipitation in a typical June.
- Record high
- 105°41° (1936)
- Record low
- 39°4° (1998)
- Heating degree days
- 3
- Cooling degree days
- 329
Jonesboro in July
Highs average 90°32° and lows 69°20°, with 3.7 in94 mm of precipitation in a typical July.
- Record high
- 112°44° (1901)
- Record low
- 46°8° (1947)
- Heating degree days
- 0
- Cooling degree days
- 440
Jonesboro in August
Highs average 89°32° and lows 67°19°, with 3.2 in80 mm of precipitation in a typical August.
- Record high
- 110°43° (1930)
- Record low
- 45°7° (1915)
- Heating degree days
- 1
- Cooling degree days
- 410
Jonesboro in September
Highs average 84°29° and lows 59°15°, with 3.5 in89 mm of precipitation in a typical September.
- Record high
- 107°42° (1925)
- Record low
- 32°0° (1899)
- Heating degree days
- 24
- Cooling degree days
- 214
Jonesboro in OctoberThis month
Highs average 73°23° and lows 48°9°, with 3.9 in99 mm of precipitation and 0.2 in0.5 cm of snow in a typical October.
- Record high
- 95°35° (1897)
- Record low
- 20°−7° (1981)
- Heating degree days
- 199
- Cooling degree days
- 47
Jonesboro in November
Highs average 59°15° and lows 37°3°, with 4.5 in115 mm of precipitation and 0.1 in0.3 cm of snow in a typical November.
- Record high
- 83°28° (1902)
- Record low
- −5°−21° (1950)
- Heating degree days
- 514
- Cooling degree days
- 4
Jonesboro in December
Highs average 48°9° and lows 30°−1°, with 4.1 in104 mm of precipitation and 2.6 in6.6 cm of snow in a typical December.
- Record high
- 76°24° (1982)
- Record low
- −14°−26° (1989)
- Heating degree days
- 811
- Cooling degree days
- 0