Jefferson Maryland Climate Data

Monthly Average Climate Data for Jefferson Maryland

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January24.7 °F41.0 °F2.99 in.
February26.1 °F44.5 °F2.44 in.
March32.9 °F52.9 °F3.61 in.
April42.5 °F65.1 °F3.44 in.
May52.1 °F73.9 °F4.3 in.
June60.9 °F82.2 °F4.01 in.
July65.4 °F86.8 °F4.23 in.
August63.5 °F84.9 °F3.19 in.
September56.9 °F78.1 °F4.49 in.
October45.7 °F66.6 °F3.57 in.
November35.8 °F55.4 °F3.08 in.
December28.5 °F44.9 °F3.57 in.
Annual44.6 °F64.7 °F42.92 in.

Climate Data for Jefferson 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 7b : 5°F to 10°F
Plant Hardiness Zone - 2012Zone 7a : 0°F to 5°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation