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

Riverdale California Climate Data

Monthly Average Climate Data for Riverdale California

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January37.5 °F56.2 °F1.8 in.
February40.2 °F62.2 °F1.5 in.
March43.2 °F68.6 °F1.46 in.
April46.3 °F74.8 °F0.69 in.
May53.0 °F82.9 °F0.43 in.
June58.2 °F90.9 °F0.06 in.
July63.6 °F96.7 °F0.01 in.
August62.4 °F95.9 °F0.0 in.
September57.8 °F91.1 °F0.06 in.
October50.0 °F80.8 °F0.39 in.
November41.1 °F66.9 °F0.66 in.
December36.0 °F56.6 °F1.33 in.
Annual49.1 °F77 °F8.39 in.

Climate Data for Riverdale California

Average First Frost DateNov. 21 - Nov. 30
Average Last Frost DateFeb. 21 - Feb. 29
Average Days With Frost10-20 Days
Plant Hardiness ZoneZone 9a : 20°F to 25°F
Plant Hardiness Zone - 2012Zone 9a : 20°F to 25°F
Current Drought ConditionsNormal
Köppen Climate ClassificationBSk - Cold Semi-Arid Climate
2026 plantmaps.com