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 = 'henderson' and st_surl='maryland' and iso_cc = 'US' and prim_loc in (1,2) Henderson Maryland Climate Data - Updated February 2026

Henderson Maryland Climate Data

Monthly Average Climate Data for Henderson Maryland

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January25.0 °F43.1 °F3.52 in.
February26.1 °F45.3 °F3.19 in.
March33.2 °F53.1 °F4.08 in.
April43.4 °F64.7 °F3.64 in.
May53.0 °F73.6 °F4.04 in.
June62.0 °F82.3 °F4.49 in.
July67.0 °F86.8 °F4.34 in.
August64.9 °F85.1 °F4.36 in.
September58.3 °F79.4 °F4.16 in.
October46.1 °F68.1 °F4.0 in.
November36.0 °F57.2 °F3.27 in.
December29.6 °F47.6 °F3.97 in.
Annual45.4 °F65.5 °F47.06 in.

Climate Data for Henderson Maryland

Average First Frost DateNov. 1 - Nov. 10
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 7a : 0°F to 5°F
Current Drought ConditionsNormal
Köppen Climate ClassificationCfa - Humid Subtropical Climate
2026 plantmaps.com