Does Rainy Weather Affect Making Jam and Jelly?

I have never had a problem but you may need to cook the juice longer. Also I don't follow the directions on the pectin which says boil for one minute. I do mine the old fashion way; I cook it until it sheets off a cool metal spoon. This makes a stiff jelly, but intensifies the flavor.

I don't think it does. I use to make it anytime I needed to, good luck.