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

Barnum Iowa Climate Data

Monthly Average Climate Data for Barnum Iowa

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January8.7 °F26.2 °F0.87 in.
February12.7 °F30.6 °F1.13 in.
March24.7 °F44.1 °F2.01 in.
April35.8 °F58.9 °F3.73 in.
May48.5 °F70.1 °F4.95 in.
June59.4 °F80.0 °F5.3 in.
July62.9 °F83.0 °F4.02 in.
August60.0 °F80.7 °F4.49 in.
September50.8 °F74.7 °F3.08 in.
October38.4 °F61.8 °F2.49 in.
November25.8 °F45.3 °F1.61 in.
December14.9 °F31.6 °F1.3 in.
Annual36.9 °F57.3 °F34.98 in.

Climate Data for Barnum 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
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