Shakin' car

My 2005 Dodge Caravan 6 cyl.shakes when I start it after it’s been sitting and weather is wet. Why?

If it truly is about wet weather then you likely have ignition parts getting moisture where it shouldn’t be. This is normally just a matter of age. Time for new plugs & wires?

Thanks. Will address that situation. I checked 2 plugs in October, bepore cold weather set in and they looked OK. Car only has 44,000 original miles on it. I bought it new.