Mystic Connecticut Climate Data

Monthly Average Climate Data for Mystic Connecticut

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January23.0 °F38.5 °F3.81 in.
February24.0 °F40.3 °F3.18 in.
March30.2 °F46.4 °F4.77 in.
April39.4 °F56.0 °F4.38 in.
May48.8 °F65.3 °F3.56 in.
June58.2 °F74.3 °F3.71 in.
July64.6 °F79.9 °F3.07 in.
August64.0 °F78.9 °F3.84 in.
September57.3 °F73.3 °F4.0 in.
October47.2 °F63.0 °F4.47 in.
November37.8 °F53.3 °F3.77 in.
December29.5 °F44.2 °F4.55 in.
Annual43.7 °F59.5 °F47.11 in.

Climate Data for Mystic Connecticut

Average First Frost DateNov. 21 - Nov. 30
Average Last Frost DateMay 1 - May 10
Average Days With Frost100-125 Days
Plant Hardiness ZoneZone 6b : -5°F to 0°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year