Rockville Connecticut Climate Data

Monthly Average Climate Data for Rockville Connecticut

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January17.1 °F35.1 °F3.39 in.
February18.3 °F37.6 °F2.98 in.
March26.3 °F45.5 °F4.14 in.
April36.6 °F58.0 °F3.99 in.
May46.6 °F68.8 °F3.62 in.
June55.9 °F77.1 °F4.28 in.
July61.4 °F82.3 °F4.06 in.
August59.7 °F80.7 °F4.2 in.
September52.3 °F74.0 °F4.41 in.
October40.9 °F62.1 °F4.72 in.
November31.5 °F50.8 °F3.67 in.
December23.5 °F40.7 °F4.28 in.
Annual39.2 °F59.4 °F47.74 in.

Climate Data for Rockville Connecticut

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateMay 11 - May 20
Average Days With Frost125-150 Days
Plant Hardiness Zone - 2023Zone 6b : -5°F to 0°F
Plant Hardiness Zone - 2012Zone 6a : -10°F to -5°F
Current Drought ConditionsNormal
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation