1995 ford

just got a 95 ford taurus with 165000 miles got it free in good shape and runs good but will not start in the rain any input from anyone will be helpful thanks

Moisture related running problems are almost always ignition related. Unless you know the car’s history it would probably be wise to just do a full round of maintenance - including new plugs & wires. The wires might be your problem.

But you can also investigate to find out. The next time it is dry (and the car will start), run the engine and use a spray bottle of water to mist various electrical components under the hood. If you, e.g., mist the wires and the car starts to stumble you have your answer. You can alternately cover & uncover things with plastic bags to get more precise.