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 = 'olympia-fields' and st_surl='illinois' and iso_cc = 'US' and prim_loc in (1,2) Olympia Fields Illinois Climate Data - Updated February 2026

Olympia Fields Illinois Climate Data

Monthly Average Climate Data for Olympia Fields Illinois

Switch Data to Celsius/Metric Units

Month	Avg. Low	Avg. High	Avg. Precip
January	16.7 °F	31.8 °F	2.25 in.
February	19.5 °F	35.7 °F	2.09 in.
March	28.8 °F	46.9 °F	2.41 in.
April	39.1 °F	59.5 °F	3.92 in.
May	50.0 °F	70.3 °F	4.52 in.
June	59.9 °F	80.1 °F	4.67 in.
July	64.5 °F	84.0 °F	4.5 in.
August	62.9 °F	82.2 °F	4.14 in.
September	55.3 °F	76.0 °F	3.24 in.
October	43.2 °F	63.0 °F	3.49 in.
November	32.4 °F	49.1 °F	2.76 in.
December	22.4 °F	36.8 °F	2.29 in.
Annual	41.2 °F	59.6 °F	40.28 in.

Climate Data for Olympia Fields 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 5b : -15°F to -10°F
Current Drought Conditions	Normal
Köppen Climate Classification	Dfa - Humid Continental Hot Summers With Year Around Precipitation

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