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

Seymour Iowa Climate Data

Monthly Average Climate Data for Seymour Iowa

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January13.5 °F31.7 °F1.13 in.
February17.4 °F36.6 °F1.49 in.
March27.9 °F49.4 °F2.28 in.
April38.7 °F61.3 °F3.96 in.
May50.4 °F71.0 °F5.46 in.
June60.2 °F80.5 °F5.39 in.
July64.5 °F84.9 °F4.61 in.
August62.0 °F83.3 °F4.3 in.
September53.1 °F76.6 °F3.88 in.
October41.0 °F63.9 °F2.96 in.
November28.8 °F49.1 °F2.1 in.
December19.1 °F37.0 °F1.55 in.
Annual39.7 °F60.4 °F39.11 in.

Climate Data for Seymour Iowa

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateApr. 21 - Apr. 30
Average Days With Frost75-100 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
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