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

Dayton Washington Climate Data

Monthly Average Climate Data for Dayton Washington

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January27.8 °F40.5 °F2.11 in.
February29.6 °F45.0 °F1.73 in.
March34.6 °F53.2 °F2.24 in.
April38.6 °F60.3 °F1.8 in.
May45.5 °F69.0 °F1.74 in.
June50.6 °F76.1 °F1.24 in.
July56.3 °F87.1 °F0.39 in.
August56.2 °F86.9 °F0.47 in.
September49.5 °F77.1 °F0.73 in.
October40.0 °F62.6 °F1.63 in.
November32.6 °F48.1 °F2.38 in.
December27.5 °F39.6 °F2.38 in.
Annual40.7 °F62.1 °F18.84 in.

Climate Data for Dayton Washington

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateApr. 11 - Apr. 20
Average Days With Frost100-125 Days
Plant Hardiness ZoneZone 7a : 0°F to 5°F
Plant Hardiness Zone - 2012Zone 7a : 0°F to 5°F
Current Drought ConditionsModerate Drought
Köppen Climate ClassificationCsb - Warm-Summer Mediterranean Climate
2026 plantmaps.com