Thief River Falls Minnesota Climate Data

Monthly Average Climate Data for Thief River Falls Minnesota

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January-4.0 °F14.1 °F0.67 in.
February-1.0 °F18.9 °F0.6 in.
March13.2 °F32.7 °F0.79 in.
April28.9 °F50.0 °F1.28 in.
May41.9 °F64.6 °F3.09 in.
June53.5 °F73.9 °F3.95 in.
July56.4 °F78.2 °F3.65 in.
August53.9 °F77.6 °F2.99 in.
September44.9 °F68.2 °F2.83 in.
October33.0 °F52.4 °F2.08 in.
November18.5 °F34.6 °F0.91 in.
December4.6 °F20.4 °F0.79 in.
Annual28.7 °F48.8 °F23.63 in.

Climate Data for Thief River Falls Minnesota

Average First Frost DateSep. 21 - Sep. 30
Average Last Frost DateMay 21 - May 31
Average Days With FrostOver 180 Days
Plant Hardiness Zone - 2023Zone 4a : -30°F to -25°F
Plant Hardiness Zone - 2012Zone 3b : -35°F to -30°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year