Palmyra Illinois Climate Data

Monthly Average Climate Data for Palmyra Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January19.9 °F35.8 °F2.24 in.
February23.3 °F41.0 °F2.03 in.
March32.3 °F52.3 °F2.93 in.
April42.8 °F64.9 °F4.4 in.
May54.3 °F74.8 °F4.82 in.
June63.3 °F83.2 °F4.47 in.
July66.4 °F86.2 °F3.7 in.
August64.2 °F85.1 °F3.33 in.
September55.9 °F79.7 °F3.29 in.
October44.5 °F67.4 °F3.22 in.
November34.0 °F52.6 °F3.2 in.
December25.1 °F40.8 °F2.29 in.
Annual43.8 °F63.7 °F39.92 in.

Climate Data for Palmyra Illinois

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateApr. 21 - Apr. 30
Average Days With Frost100-125 Days
Plant Hardiness Zone - 2023Zone 6b : -5°F to 0°F
Plant Hardiness Zone - 2012Zone 6a : -10°F to -5°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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