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

Rosemont Maryland Climate Data

Monthly Average Climate Data for Rosemont Maryland

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January23.9 °F41.5 °F3.02 in.
February25.4 °F45.0 °F2.4 in.
March32.1 °F53.4 °F3.55 in.
April42.0 °F65.6 °F3.37 in.
May51.8 °F74.3 °F4.27 in.
June60.6 °F82.6 °F3.93 in.
July65.1 °F87.2 °F4.05 in.
August63.2 °F85.4 °F3.23 in.
September56.2 °F78.7 °F4.43 in.
October44.8 °F67.5 °F3.43 in.
November34.8 °F55.9 °F3.06 in.
December27.9 °F45.4 °F3.43 in.
Annual44 °F65.2 °F42.17 in.

Climate Data for Rosemont Maryland

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateApr. 11 - Apr. 20
Average Days With Frost75-100 Days
Plant Hardiness ZoneZone 7a : 0°F to 5°F
Plant Hardiness Zone - 2012Zone 7a : 0°F to 5°F
Current Drought ConditionsSevere Drought
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
2026 plantmaps.com