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

Ahtanum Washington Climate Data

Monthly Average Climate Data for Ahtanum Washington

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January24.2 °F38.3 °F1.52 in.
February26.6 °F45.8 °F0.96 in.
March31.1 °F54.6 °F0.77 in.
April36.0 °F62.6 °F0.67 in.
May43.8 °F72.0 °F0.85 in.
June49.5 °F78.5 °F0.52 in.
July55.1 °F87.6 °F0.24 in.
August54.0 °F86.9 °F0.19 in.
September46.1 °F78.1 °F0.3 in.
October36.6 °F63.6 °F0.73 in.
November28.6 °F48.2 °F1.03 in.
December23.3 °F37.4 °F1.48 in.
Annual37.9 °F62.8 °F9.26 in.

Climate Data for Ahtanum Washington

Average First Frost DateOct. 1 - Oct. 10
Average Last Frost DateMay 1 - May 10
Average Days With Frost100-125 Days
Plant Hardiness ZoneZone 7a : 0°F to 5°F
Plant Hardiness Zone - 2012Zone 6b : -5°F to 0°F
Current Drought ConditionsModerate Drought
Köppen Climate ClassificationDsb - Humid Continental Climate - Dry Cool Summer
2026 plantmaps.com