On a clear day, you can drive in a somewhat assertive way. You can get closer to vehicles and drive a little bit faster than you would be able to on a rainy day. One of the reasons that you have to be a little more careful on the road during a rainy day is that it brings a lot more hazards out that you have to face.
You are going to need a little more space between vehicles for various reasons. One of the reasons is that a wet road is going to be a bit more slippery. Another reason for extra space is that when the rain is really heavy, it can be a little harder to see.
You might also want to check the tires on your vehicle. Your ability to maintain control of your vehicle is also influenced by the conditions of your tires.