select pnm,lnm,st_cd,st_nm,cnty_id,dm,dm_date,dm_hist,avg_tmax_data,avg_tmin_data,avg_prcp_data,rec_hi_data,rec_lo_data,avg_sndp_data,x,y,ff,lf,fd,hz,er,hz_source,kg,hzd,clim_stn_nm,hz12,hz90, feels_like_min,feels_like_max,days_of_prcp,snow,cloud_cover,humidity,wind_speed from worldtg8_pm.pm_climate_points_namer where surl = 'lee' and st_surl='illinois' and iso_cc = 'US' and prim_loc in (1,2) Lee Illinois Climate Data - Updated February 2026

Lee Illinois Climate Data

Monthly Average Climate Data for Lee Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January12.2 °F28.2 °F1.6 in.
February15.8 °F32.6 °F1.65 in.
March25.9 °F45.1 °F2.17 in.
April36.3 °F58.7 °F3.5 in.
May48.3 °F70.3 °F4.84 in.
June58.2 °F79.5 °F4.73 in.
July61.7 °F82.4 °F3.96 in.
August59.3 °F80.4 °F3.82 in.
September51.0 °F74.8 °F3.46 in.
October39.3 °F61.9 °F2.88 in.
November28.8 °F46.7 °F2.27 in.
December18.4 °F33.8 °F1.82 in.
Annual37.9 °F57.9 °F36.7 in.

Climate Data for Lee Illinois

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateApr. 21 - Apr. 30
Average Days With Frost100-125 Days
Plant Hardiness ZoneZone 5b : -15°F to -10°F
Plant Hardiness Zone - 2012Zone 5a : -20°F to -15°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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