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 = 'sumpter' and st_surl='oregon' and iso_cc = 'US' and prim_loc in (1,2) Sumpter Oregon Climate Data - Updated February 2026

Sumpter Oregon Climate Data

Monthly Average Climate Data for Sumpter Oregon

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January16.0 °F35.0 °F2.63 in.
February18.1 °F40.0 °F1.75 in.
March23.1 °F47.0 °F1.92 in.
April27.8 °F53.3 °F1.61 in.
May34.3 °F62.4 °F2.02 in.
June39.4 °F70.2 °F1.42 in.
July44.9 °F82.1 °F0.58 in.
August44.1 °F82.3 °F0.59 in.
September37.4 °F73.1 °F0.63 in.
October29.9 °F58.4 °F1.22 in.
November23.3 °F43.2 °F2.14 in.
December16.3 °F33.9 °F2.91 in.
Annual29.6 °F56.7 °F19.42 in.

Climate Data for Sumpter Oregon

Average First Frost DateSep.11 - Sep. 20
Average Last Frost DateJun. 1 - Jun. 10
Average Days With Frost
Plant Hardiness ZoneZone 6a : -10°F to -5°F
Plant Hardiness Zone - 2012Zone 5a : -20°F to -15°F
Current Drought ConditionsModerate Drought
Köppen Climate ClassificationBSk - Cold Semi-Arid Climate
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