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 = 'mechanicsburg' and st_surl='illinois' and iso_cc = 'US' and prim_loc in (1,2) Mechanicsburg Illinois Climate Data - Updated February 2026

Mechanicsburg Illinois Climate Data

Monthly Average Climate Data for Mechanicsburg Illinois

Switch Data to Celsius/Metric Units

Month	Avg. Low	Avg. High	Avg. Precip
January	18.5 °F	35.3 °F	2.1 in.
February	21.6 °F	39.9 °F	1.96 in.
March	30.8 °F	51.5 °F	2.68 in.
April	41.6 °F	64.3 °F	4.03 in.
May	53.1 °F	74.4 °F	4.59 in.
June	62.2 °F	83.0 °F	4.61 in.
July	65.1 °F	86.1 °F	3.75 in.
August	63.2 °F	84.6 °F	3.29 in.
September	54.8 °F	79.5 °F	3.1 in.
October	43.2 °F	67.0 °F	3.21 in.
November	32.5 °F	52.1 °F	2.97 in.
December	24.0 °F	40.2 °F	2.18 in.
Annual	42.6 °F	63.2 °F	38.47 in.

Climate Data for Mechanicsburg Illinois

Average First Frost Date	Oct. 11 - Oct. 20
Average Last Frost Date	Apr. 11 - Apr. 20
Average Days With Frost	75-100 Days
Plant Hardiness Zone	Zone 6a : -10°F to -5°F
Plant Hardiness Zone - 2012	Zone 6a : -10°F to -5°F
Current Drought Conditions	Severe Drought
Köppen Climate Classification	Dfa - Humid Continental Hot Summers With Year Around Precipitation

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