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1.
A sarcastic reference to an extremely cold summer day.
Well, I better break out my sweater since it's Junuary 1st in the Puget Sound.
by Mischief83 June 10, 2008
 
2.
A month just before summer during which hail and freezing rain are common. It is usually followed by intense, pet killing heat waves.
Junuary in Oregon is a cozy time to sit by the fire and plant tomato starts or organize swimwear.
by Wieser August 27, 2010