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

Salem Iowa Climate Data

Monthly Average Climate Data for Salem Iowa

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January15.8 °F32.4 °F1.47 in.
February19.4 °F37.0 °F1.76 in.
March29.8 °F49.7 °F2.45 in.
April40.8 °F62.9 °F3.72 in.
May52.6 °F73.1 °F5.18 in.
June62.3 °F82.3 °F4.97 in.
July65.9 °F85.9 °F4.14 in.
August63.7 °F84.4 °F3.68 in.
September55.0 °F77.9 °F3.64 in.
October43.4 °F65.0 °F2.94 in.
November31.9 °F50.1 °F2.26 in.
December21.7 °F37.5 °F1.76 in.
Annual41.9 °F61.5 °F37.97 in.

Climate Data for Salem Iowa

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateApr. 21 - Apr. 30
Average Days With Frost75-100 Days
Plant Hardiness ZoneZone 6a : -10°F to -5°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