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 = 'granite-falls' and st_surl='washington' and iso_cc = 'US' and prim_loc in (1,2) Granite Falls Washington Climate Data - Updated February 2026

Granite Falls Washington Climate Data

Monthly Average Climate Data for Granite Falls Washington

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January33.2 °F45.0 °F6.95 in.
February33.4 °F48.1 °F4.95 in.
March35.8 °F52.4 °F5.62 in.
April39.8 °F57.5 °F4.42 in.
May45.4 °F64.2 °F3.1 in.
June49.7 °F68.1 °F3.04 in.
July53.3 °F74.7 °F1.22 in.
August53.3 °F75.6 °F1.18 in.
September48.9 °F69.8 °F2.79 in.
October42.5 °F58.9 °F5.57 in.
November36.8 °F49.7 °F7.41 in.
December33.1 °F44.0 °F6.51 in.
Annual42.1 °F59 °F52.76 in.

Climate Data for Granite Falls Washington

Average First Frost DateOct. 21 - Oct. 31
Average Last Frost DateApr. 11 - Apr. 20
Average Days With Frost40-50 Days
Plant Hardiness ZoneZone 8b : 15°F to 20°F
Plant Hardiness Zone - 2012Zone 8b : 15°F to 20°F
Current Drought ConditionsNormal
Köppen Climate ClassificationCsb - Warm-Summer Mediterranean Climate
2026 plantmaps.com