Sisters
Oregon, USA
Long term weather forecast
Long term weather forecast

December weather forecast and Climate
Sisters, OR

  • Average high temperature in December: 4.7°C

Warmest month (with highest average high temperature) is July (29.1°C).
Month with lowest average high temperature is December (4.7°C).

  • Average low temperature in December: -6.2°C

Month with highest average low temperature is July (5.8°C).
Coldest month (with lowest average low temperature) is December (-6.2°C).

  • Average rainfall in December: 57.7mm

Wettest month (with highest rainfall) is December (57.7mm).
Driest month (with lowest rainfall) is July (9.7mm).

  • Average rainfall days in December: 9 days

Month with highest number of rainy days is November (10 days).
Month with lowest number of rainy days is July (2 days).

  • Average snowfall in December: 200.7mm

Month with highest snowfall is January (210.8mm).
Months with lowest snowfall are May, June, July, August and September (0mm).

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