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

Armstrong Iowa Climate Data

Monthly Average Climate Data for Armstrong Iowa

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January7.3 °F24.0 °F0.79 in.
February11.2 °F28.3 °F0.9 in.
March23.4 °F41.1 °F1.76 in.
April35.3 °F56.9 °F3.39 in.
May47.9 °F69.4 °F4.51 in.
June59.0 °F79.5 °F4.95 in.
July62.3 °F82.4 °F4.06 in.
August59.6 °F80.0 °F3.75 in.
September51.1 °F74.4 °F3.19 in.
October38.0 °F60.3 °F2.4 in.
November25.0 °F43.4 °F1.39 in.
December13.6 °F29.3 °F1.18 in.
Annual36.1 °F55.8 °F32.27 in.

Climate Data for Armstrong 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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