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 = 'earlham' and st_surl='iowa' and iso_cc = 'US' and prim_loc in (1,2) Earlham Iowa Climate Data - Updated February 2026

Earlham Iowa Climate Data

Monthly Average Climate Data for Earlham Iowa

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January11.8 °F29.9 °F0.9 in.
February16.0 °F35.1 °F1.19 in.
March26.7 °F47.9 °F2.04 in.
April38.0 °F61.3 °F3.64 in.
May49.9 °F71.5 °F4.93 in.
June60.1 °F80.8 °F5.04 in.
July64.1 °F84.7 °F4.18 in.
August61.6 °F83.0 °F3.97 in.
September52.8 °F76.7 °F3.51 in.
October40.5 °F64.0 °F2.65 in.
November28.2 °F48.4 °F1.84 in.
December17.4 °F34.9 °F1.31 in.
Annual38.9 °F59.9 °F35.2 in.

Climate Data for Earlham Iowa

Average First Frost DateOct. 1 - Oct. 10
Average Last Frost DateApr. 21 - Apr. 30
Average Days With Frost100-125 Days
Plant Hardiness ZoneZone 5b : -15°F to -10°F
Plant Hardiness Zone - 2012Zone 5a : -20°F to -15°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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