Upper Lake
California, USA
Long-term weather forecast
Long-term weather forecast
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December weather forecast and Climate
Upper Lake, CA

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  • The average high temperature in December: 13.3°C

The warmest month (with the highest average high temperature) is July (33.9°C).
The month with the lowest average high temperature is January (12.6°C).

  • The average low temperature in December: 0.3°C

The month with the highest average low temperature is July (11.1°C).
The coldest month (with the lowest average low temperature) is December (0.3°C).

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  • The average rainfall in December: 174.2mm

The wettest month (with the highest rainfall) is January (186.7mm).
The driest month (with the lowest rainfall) is July (0.8mm).

  • The average rainfall days in December: 10 days

The month with the highest number of rainy days is January (13 days).
Months with the lowest number of rainy days are July and August (0 days).

  • The average snowfall in December: 10.2mm

The month with the highest snowfall is January (22.9mm).
Months with the lowest snowfall are April, May, June, July, August, September and October (0mm).

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