Marietta Minnesota Climate Data

Monthly Average Climate Data for Marietta Minnesota

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January3.9 °F22.4 °F0.73 in.
February7.4 °F26.8 °F0.73 in.
March20.0 °F38.9 °F1.28 in.
April32.9 °F55.0 °F2.49 in.
May46.1 °F68.5 °F3.01 in.
June57.2 °F78.4 °F3.89 in.
July60.9 °F82.5 °F3.68 in.
August58.1 °F80.4 °F3.06 in.
September49.2 °F73.3 °F2.53 in.
October36.1 °F58.7 °F2.21 in.
November23.2 °F42.1 °F1.11 in.
December10.8 °F27.8 °F0.83 in.
Annual33.8 °F54.6 °F25.55 in.

Climate Data for Marietta Minnesota

Average First Frost DateOct. 1 - Oct. 10
Average Last Frost DateMay 11 - May 20
Average Days With Frost150-180 Days
Plant Hardiness Zone - 2023Zone 4b : -25°F to -20°F
Plant Hardiness Zone - 2012Zone 4b : -25°F to -20°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year