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

Corydon Iowa Climate Data

Monthly Average Climate Data for Corydon Iowa

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January13.2 °F31.6 °F1.11 in.
February17.1 °F36.3 °F1.44 in.
March27.8 °F49.2 °F2.27 in.
April38.6 °F61.1 °F3.92 in.
May50.3 °F70.8 °F5.44 in.
June60.2 °F80.2 °F5.62 in.
July64.5 °F84.8 °F4.58 in.
August62.0 °F83.1 °F4.29 in.
September53.0 °F76.6 °F3.83 in.
October40.9 °F63.9 °F2.96 in.
November28.5 °F49.0 °F2.0 in.
December18.8 °F36.9 °F1.53 in.
Annual39.6 °F60.3 °F38.99 in.

Climate Data for Corydon 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 5b : -15°F to -10°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
2026 plantmaps.com