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

Clayton Iowa Climate Data

Monthly Average Climate Data for Clayton Iowa

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January9.3 °F26.2 °F1.25 in.
February12.8 °F30.9 °F1.23 in.
March24.8 °F43.5 °F1.99 in.
April36.4 °F57.6 °F3.79 in.
May48.1 °F69.3 °F4.63 in.
June58.4 °F78.8 °F5.79 in.
July62.3 °F82.3 °F4.63 in.
August60.1 °F80.5 °F3.89 in.
September51.7 °F73.7 °F3.82 in.
October39.6 °F60.7 °F2.81 in.
November27.5 °F44.9 °F2.08 in.
December16.5 °F31.9 °F1.59 in.
Annual37.3 °F56.7 °F37.5 in.

Climate Data for Clayton Iowa

Average First Frost DateOct. 11 - Oct. 20
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 ConditionsAbnormally Dry
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
2026 plantmaps.com