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 = 'brockton' and st_surl='montana' and iso_cc = 'US' and prim_loc in (1,2) Brockton Montana Climate Data - Updated February 2026

Brockton Montana Climate Data

Monthly Average Climate Data for Brockton Montana

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January1.8 °F23.4 °F0.32 in.
February5.6 °F28.8 °F0.28 in.
March17.5 °F41.8 °F0.51 in.
April29.1 °F57.4 °F1.03 in.
May40.0 °F68.8 °F2.22 in.
June50.5 °F77.7 °F2.96 in.
July55.3 °F85.7 °F2.56 in.
August53.1 °F85.7 °F1.47 in.
September42.9 °F74.9 °F1.23 in.
October30.4 °F58.1 °F0.86 in.
November17.3 °F40.5 °F0.45 in.
December6.2 °F27.7 °F0.37 in.
Annual29.1 °F55.9 °F14.26 in.

Climate Data for Brockton Montana

Average First Frost DateSep. 21 - Sep. 30
Average Last Frost DateMay 11 - May 20
Average Days With Frost
Plant Hardiness ZoneZone 4a : -30°F to -25°F
Plant Hardiness Zone - 2012Zone 3b : -35°F to -30°F
Current Drought ConditionsNormal
Köppen Climate ClassificationBSk - Cold Semi-Arid Climate
2026 plantmaps.com