Dressy Pants Suit Going To A Funeral For My Husbands Grandmother. What Should I Wear?

Going to a funeral for my husbands grandmother. What should I wear? - dressy pants suit

I have a black trouser suit with long sleeves. Is this ok in a warmer climate of spring? (As long as I feel good), or for individuals who are long-sleeved pants in cold weather? I live in southern Alabama, where at the beginning of May and is heated. Will I look stupid with long sleeves, pants, or it is his wedding clothes?