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 = 'la-grande' and st_surl='washington' and iso_cc = 'US' and prim_loc in (1,2) La Grande Washington Climate Data - Updated February 2026

La Grande Washington Climate Data

Monthly Average Climate Data for La Grande Washington

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January33.5 °F45.1 °F5.28 in.
February33.4 °F47.4 °F3.33 in.
March35.4 °F51.8 °F4.93 in.
April38.3 °F58.4 °F3.92 in.
May43.9 °F66.4 °F2.87 in.
June48.0 °F71.0 °F2.16 in.
July52.0 °F78.3 °F0.78 in.
August52.4 °F79.4 °F1.02 in.
September48.4 °F72.2 °F1.63 in.
October42.0 °F59.9 °F3.77 in.
November36.4 °F49.2 °F5.55 in.
December32.9 °F44.0 °F5.11 in.
Annual41.4 °F60.3 °F40.35 in.

Climate Data for La Grande Washington

Average First Frost DateOct. 21 - Oct. 31
Average Last Frost DateApr. 1 - Apr. 10
Average Days With Frost40-50 Days
Plant Hardiness ZoneZone 8b : 15°F to 20°F
Plant Hardiness Zone - 2012Zone 8a : 10°F to 15°F
Current Drought ConditionsNormal
Köppen Climate ClassificationCsb - Warm-Summer Mediterranean Climate
2026 plantmaps.com