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 = 'walnut-hill' and st_surl='illinois' and iso_cc = 'US' and prim_loc in (1,2) Walnut Hill Illinois Climate Data - Updated February 2026

Walnut Hill Illinois Climate Data

Monthly Average Climate Data for Walnut Hill Illinois

Switch Data to Celsius/Metric Units

Month	Avg. Low	Avg. High	Avg. Precip
January	22.2 °F	38.7 °F	3.0 in.
February	25.5 °F	43.5 °F	2.67 in.
March	34.1 °F	53.9 °F	3.76 in.
April	44.4 °F	65.8 °F	4.87 in.
May	55.2 °F	75.2 °F	5.12 in.
June	63.8 °F	84.3 °F	4.68 in.
July	67.2 °F	87.3 °F	4.05 in.
August	64.8 °F	86.5 °F	3.44 in.
September	56.6 °F	80.5 °F	3.39 in.
October	45.1 °F	69.0 °F	3.39 in.
November	35.0 °F	54.3 °F	3.9 in.
December	26.8 °F	42.9 °F	3.01 in.
Annual	45.1 °F	65.2 °F	45.28 in.

Climate Data for Walnut Hill Illinois

Average First Frost Date	Oct. 21 - Oct. 31
Average Last Frost Date	Apr. 1 - Apr. 10
Average Days With Frost	75-100 Days
Plant Hardiness Zone	Zone 6b : -5°F to 0°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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