Portland Colorado Climate Data

Monthly Average Climate Data for Portland Colorado

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-12.1 °C3.3 °C33.53 mm
February-9.8 °C5.2 °C36.07 mm
March-5.8 °C9.9 °C45.47 mm
April-2.2 °C13.7 °C48.26 mm
May1.8 °C19.3 °C39.88 mm
June5.7 °C25.8 °C20.57 mm
July9.5 °C27.8 °C50.04 mm
August8.8 °C26.3 °C53.85 mm
September4.6 °C22.9 °C48.51 mm
October-1.3 °C16.4 °C42.93 mm
November-6.7 °C9.3 °C36.83 mm
December-12.1 °C3.2 °C35.05 mm
Annual-1.6 °C15.3 °C490.99 mm

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 : -26.1°C to -23.3°C
Plant Hardiness Zone - 2012Zone 5a : -28.9°C to -26.1°C
Current Drought ConditionsNormal
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year
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