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 = 'lewiston' and st_surl='idaho' and iso_cc = 'US' and prim_loc in (1,2) Lewiston Idaho Climate Data - Updated February 2026

Lewiston Idaho Climate Data

Monthly Average Climate Data for Lewiston Idaho

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January31.1 °F43.1 °F1.07 in.
February32.1 °F48.4 °F1.22 in.
March35.8 °F56.6 °F1.32 in.
April41.1 °F64.3 °F1.19 in.
May47.7 °F73.5 °F1.37 in.
June53.3 °F80.3 °F0.93 in.
July59.2 °F92.2 °F0.57 in.
August59.0 °F91.9 °F0.48 in.
September51.9 °F81.7 °F0.51 in.
October42.9 °F65.6 °F1.08 in.
November35.5 °F50.5 °F1.12 in.
December30.4 °F41.7 °F0.88 in.
Annual43.3 °F65.8 °F11.74 in.

Climate Data for Lewiston Idaho

Average First Frost DateOct. 21 - Oct. 31
Average Last Frost DateApr. 1 - Apr. 10
Average Days With Frost50-75 Days
Plant Hardiness ZoneZone 7b : 5°F to 10°F
Plant Hardiness Zone - 2012Zone 7b : 5°F to 10°F
Current Drought ConditionsSevere Drought
Köppen Climate ClassificationBSk - Cold Semi-Arid Climate
2026 plantmaps.com