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 = 'walnut' and st_surl='california' and iso_cc = 'US' and prim_loc in (1,2) Walnut California Climate Data - Updated February 2026

Walnut California Climate Data

Monthly Average Climate Data for Walnut California

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January45.1 °F68.7 °F3.89 in.
February45.9 °F68.9 °F4.13 in.
March48.0 °F71.5 °F2.33 in.
April50.5 °F74.6 °F0.76 in.
May54.9 °F77.9 °F0.37 in.
June58.4 °F83.4 °F0.12 in.
July62.5 °F90.0 °F0.05 in.
August62.9 °F91.9 °F0.02 in.
September61.1 °F89.3 °F0.14 in.
October56.0 °F82.4 °F0.66 in.
November49.2 °F74.8 °F0.97 in.
December44.5 °F68.0 °F2.69 in.
Annual53.3 °F78.5 °F16.13 in.

Climate Data for Walnut California

Average First Frost DateNo Frost
Average Last Frost Date
Average Days With FrostFrost Free
Plant Hardiness ZoneZone 10a : 30°F to 25°F
Plant Hardiness Zone - 2012Zone 10a : 30°F to 25°F
Current Drought ConditionsNormal
Köppen Climate ClassificationCsa - Hot-Summer Mediterranean Climate
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