I think embracing the weather that we have is the best way to go, since all weather types can be very beautiful and unique in photos. Rainy shoots where people embrace it and just show their true love keeping each other warm, are some of my favorites. Or how about a snowy day, throwing some snowballs and riding a sled… Don’t get caught in the perception that only sunny days are good for shooting, because sometimes they are not.
That being said. If the weather is going to be so bad my gear starts disagreeing or your body does ;-), we would be able to reschedule.