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

Hayfield Iowa Climate Data

Monthly Average Climate Data for Hayfield Iowa

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January7.0 °F23.8 °F0.89 in.
February11.3 °F28.6 °F0.96 in.
March23.5 °F41.1 °F2.0 in.
April35.0 °F56.5 °F3.77 in.
May47.4 °F68.9 °F4.76 in.
June58.3 °F78.8 °F5.26 in.
July61.5 °F81.8 °F4.24 in.
August58.8 °F79.5 °F3.84 in.
September50.0 °F73.4 °F3.15 in.
October37.5 °F60.1 °F2.3 in.
November25.4 °F43.3 °F1.61 in.
December13.8 °F29.5 °F1.28 in.
Annual35.8 °F55.4 °F34.06 in.

Climate Data for Hayfield Iowa

Average First Frost DateOct. 1 - Oct. 10
Average Last Frost DateApr. 21 - Apr. 30
Average Days With Frost100-125 Days
Plant Hardiness ZoneZone 5a : -20°F to -15°F
Plant Hardiness Zone - 2012Zone 5a : -20°F to -15°F
Current Drought ConditionsNormal
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
2026 plantmaps.com