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 = 'oconomowoc-lake' and st_surl='wisconsin' and iso_cc = 'US' and prim_loc in (1,2) Oconomowoc Lake Wisconsin Climate Data - Updated February 2026

Oconomowoc Lake Wisconsin Climate Data

Monthly Average Climate Data for Oconomowoc Lake Wisconsin

Switch Data to Celsius/Metric Units

Month	Avg. Low	Avg. High	Avg. Precip
January	11.1 °F	27.2 °F	1.65 in.
February	13.7 °F	30.8 °F	1.6 in.
March	23.8 °F	42.5 °F	2.05 in.
April	35.1 °F	55.7 °F	3.76 in.
May	46.4 °F	67.7 °F	4.12 in.
June	56.4 °F	77.5 °F	4.86 in.
July	60.8 °F	81.6 °F	4.09 in.
August	59.0 °F	79.9 °F	4.03 in.
September	50.9 °F	73.1 °F	3.32 in.
October	39.6 °F	59.9 °F	2.87 in.
November	28.4 °F	45.3 °F	2.17 in.
December	17.9 °F	32.7 °F	1.89 in.
Annual	36.9 °F	56.2 °F	36.41 in.

Climate Data for Oconomowoc Lake Wisconsin

Average First Frost Date	Oct. 1 - Oct. 10
Average Last Frost Date	May 1 - May 10
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	Normal
Köppen Climate Classification	Dfa - Humid Continental Hot Summers With Year Around Precipitation

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