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 = 'ionia' and st_surl='michigan' and iso_cc = 'US' and prim_loc in (1,2) Ionia Michigan Climate Data - Updated February 2026

Ionia Michigan Climate Data

Monthly Average Climate Data for Ionia Michigan

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January16.6 °F30.1 °F2.38 in.
February17.3 °F33.0 °F2.13 in.
March25.0 °F43.5 °F2.29 in.
April35.3 °F57.1 °F3.7 in.
May47.0 °F68.9 °F4.15 in.
June57.1 °F78.4 °F3.56 in.
July60.8 °F82.3 °F3.39 in.
August59.2 °F80.2 °F3.62 in.
September50.9 °F73.0 °F3.05 in.
October40.4 °F60.4 °F3.32 in.
November31.2 °F46.7 °F2.87 in.
December23.0 °F35.3 °F2.2 in.
Annual38.7 °F57.4 °F36.66 in.

Climate Data for Ionia Michigan

Average First Frost DateOct. 1 - Oct. 10
Average Last Frost DateMay 1 - May 10
Average Days With Frost125-150 Days
Plant Hardiness ZoneZone 6a : -10°F to -5°F
Plant Hardiness Zone - 2012Zone 5b : -15°F to -10°F
Current Drought ConditionsNormal
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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