THE RAIN MAC
Its raining, its not hot, it not cold but its wet - the coat you need is a rain mac.
I love my yellow one its been so useful - its really comfortable (soft lining), got massive pockets (full of old oat cakes), a hood and its really waterproof! Its perfect for pushing the buggy in the rain - which is the season we are coming in to.
I've spotted a few others that would also make going out in the rain a bit more fun and a bit less wet.