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 = 'altamont' and st_surl='south-dakota' and iso_cc = 'US' and prim_loc in (1,2) Altamont South Dakota Climate Data - Updated February 2026

Altamont South Dakota Climate Data

Monthly Average Climate Data for Altamont South Dakota

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January3.2 °F21.2 °F0.68 in.
February7.0 °F25.6 °F0.81 in.
March19.0 °F38.0 °F1.38 in.
April31.5 °F53.2 °F2.65 in.
May44.6 °F66.1 °F3.37 in.
June55.3 °F75.6 °F4.23 in.
July60.0 °F80.9 °F3.45 in.
August57.6 °F78.8 °F3.1 in.
September48.8 °F70.9 °F2.74 in.
October35.4 °F57.0 °F2.31 in.
November21.9 °F40.2 °F1.12 in.
December9.6 °F26.5 °F0.93 in.
Annual32.8 °F52.8 °F26.77 in.

Climate Data for Altamont South Dakota

Average First Frost DateOct. 1 - Oct. 10
Average Last Frost DateMay 1 - May 10
Average Days With Frost125-150 Days
Plant Hardiness ZoneZone 4b : -25°F to -20°F
Plant Hardiness Zone - 2012Zone 4b : -25°F to -20°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year
2026 plantmaps.com