Grafton Nebraska Climate Data

Monthly Average Climate Data for Grafton Nebraska

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January14.4 °F35.1 °F0.63 in.
February18.0 °F39.4 °F0.71 in.
March27.2 °F52.2 °F1.42 in.
April37.6 °F62.9 °F2.5 in.
May49.7 °F72.9 °F4.84 in.
June60.5 °F83.1 °F4.08 in.
July64.8 °F86.8 °F3.53 in.
August62.4 °F84.7 °F3.54 in.
September53.2 °F78.7 °F2.56 in.
October40.3 °F66.1 °F2.14 in.
November27.5 °F51.1 °F1.2 in.
December18.3 °F38.4 °F0.92 in.
Annual39.5 °F62.6 °F28.07 in.

Climate Data for Grafton Nebraska

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateMay 1 - May 10
Average Days With Frost125-150 Days
Plant Hardiness Zone - 2023Zone 6a : -10°F to -5°F
Plant Hardiness Zone - 2012Zone 5b : -15°F to -10°F
Current Drought ConditionsModerate Drought
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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