I'm certain if you google "jetting temperature chart" you'll find several links to conversion charts. Keep in mind that baseline jetting is usually for 70 degrees F at sea level.
From experience when the outside temp drops below 50F I go up one size on the main from baseline. Below 30F I go up two sizes on the main from baseline. Below 10F it's just too damn cold to go riding. Never had to change the pilot, but I do turn the air screw in.
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