Saab stalls or won't start when it rains

bad distributor cap and or ignition wires.

Could be moisture in the distributor cap.
I am assuming you mean it cranks but will not start.

Do the RPMs raise?

Absolute best Saab shop in Atlanta area is M&M Saab in Woodstock. They build and race Saab.

Pull distributor cap and dry it off. Dry the wires. Not fixed? Change the spark plug wires.This rotary is wet at a source in ignition circuit.

I am not sure if it is the same problem I had with my '04 93 SS, but there is a cabin air filter that has a drain next to it that allows the rain water to run down to the ground. Mine was clogged up with leaves and other junk which caused the rain water to leak through the filter into the cabin. Being that yours is a different body style, your filter may be on the drivers side which would cause this. I would try to look up where your Cabin Air Filter is and try to clean the drain.

you may have ruined your alarm computer wich is under seat. it can be replaced with a good used unit but a shop with Tech2 must program it. If no communication with computer m ore than likely bad.

Moisture in your ignition system can cause this to happen , start with a cap/rotor and wire replacement. More then likely this will cure your rainy day blues.