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 = 'ephrata' and st_surl='washington' and iso_cc = 'US' and prim_loc in (1,2) Ephrata Washington Climate Data - Updated February 2026

Ephrata Washington Climate Data

Monthly Average Climate Data for Ephrata Washington

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January23.9 °F36.0 °F0.96 in.
February26.8 °F43.2 °F0.71 in.
March31.6 °F53.5 °F0.75 in.
April37.1 °F62.7 °F0.67 in.
May45.3 °F72.5 °F0.65 in.
June51.4 °F79.3 °F0.66 in.
July57.7 °F88.6 °F0.29 in.
August56.7 °F87.5 °F0.18 in.
September48.6 °F78.2 °F0.25 in.
October38.4 °F62.9 °F0.67 in.
November29.5 °F46.5 °F0.93 in.
December23.7 °F35.8 °F1.24 in.
Annual39.2 °F62.2 °F7.96 in.

Climate Data for Ephrata Washington

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateApr. 21 - Apr. 30
Average Days With Frost75-100 Days
Plant Hardiness ZoneZone 7a : 0°F to 5°F
Plant Hardiness Zone - 2012Zone 6b : -5°F to 0°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationBSk - Cold Semi-Arid Climate
2026 plantmaps.com