Portland Colorado Climate Data

Monthly Average Climate Data for Portland Colorado

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January10.2 °F37.9 °F1.32 in.
February14.4 °F41.4 °F1.42 in.
March21.6 °F49.8 °F1.79 in.
April28.0 °F56.6 °F1.9 in.
May35.2 °F66.8 °F1.57 in.
June42.3 °F78.4 °F0.81 in.
July49.1 °F82.1 °F1.97 in.
August47.9 °F79.4 °F2.12 in.
September40.3 °F73.2 °F1.91 in.
October29.7 °F61.5 °F1.69 in.
November20.0 °F48.7 °F1.45 in.
December10.3 °F37.8 °F1.38 in.
Annual29.1 °F59.5 °F19.33 in.

Climate Data for Portland Colorado

Average First Frost DateSep.1 - Sep. 10
Average Last Frost DateJun. 21 - Jun. 30
Average Days With FrostOver 180 Days
Plant Hardiness Zone - 2023Zone 5b : -15°F to -10°F
Plant Hardiness Zone - 2012Zone 5a : -20°F to -15°F
Current Drought ConditionsNormal
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year
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