https://theweatherwiz.com/long-range-forecast.php
Ive used this for years...it also does International...Like many folks we book waaay in advance, and we've never cancelled a cruise outright because of the weather...but eyeballing things like snowstorms, rainy seasons, hurricanes helps...especially packing...yeh I know sometimes the weather types on tv couldn't predict their way out of a paper bag...but its good enough for our purposes....