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 DateMay 11 - May 20
Average Days With Frost100-125 Days
Plant Hardiness Zone - 2023Zone 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