All of my water in my pipes having been taking a long time to go down. I have a septic and leach fields. There has been snow on the ground for 3 months? Do you think it's the weather, or do I have problems? What can I do? Its my toliets and bathtub.

It could be both the weather and clogging that's making things run slowly. I would try a combination of cleaning your tub traps and plunging with a steady dose of pouring a bucket of warm water down the toilet. If this isn't successful roto rooting the main is the next step. These are things to try first before making that phone call to a professional.

Where is your clean out?