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

Winnebago Illinois Climate Data

Monthly Average Climate Data for Winnebago Illinois

Switch Data to Celsius/Metric Units

Month	Avg. Low	Avg. High	Avg. Precip
January	12.1 °F	28.0 °F	1.6 in.
February	15.5 °F	32.2 °F	1.66 in.
March	25.8 °F	44.5 °F	2.16 in.
April	36.5 °F	58.1 °F	3.71 in.
May	48.3 °F	69.6 °F	4.48 in.
June	58.4 °F	79.0 °F	5.35 in.
July	61.8 °F	82.1 °F	4.11 in.
August	60.0 °F	80.6 °F	4.13 in.
September	51.5 °F	74.4 °F	3.47 in.
October	40.0 °F	61.5 °F	2.89 in.
November	29.0 °F	46.3 °F	2.19 in.
December	18.6 °F	33.6 °F	1.94 in.
Annual	38.1 °F	57.5 °F	37.69 in.

Climate Data for Winnebago Illinois

Average First Frost Date	Oct. 11 - Oct. 20
Average Last Frost Date	Apr. 21 - Apr. 30
Average Days With Frost	100-125 Days
Plant Hardiness Zone	Zone 5b : -15°F to -10°F
Plant Hardiness Zone - 2012	Zone 5a : -20°F to -15°F
Current Drought Conditions	Abnormally Dry
Köppen Climate Classification	Dfa - Humid Continental Hot Summers With Year Around Precipitation

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