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This is a 1999 Honda Accord.
The car has new battery & cables and everything lights up on dash when turning key in ignition, but it will not turn over when we've had rain or snow.
The weather has been dry last 4 days & car starts every time. Someone suggested crack in coil packs possibly? What could explain this behavior?
I would also recommend replacing the distributor cap, distributor rotor (usually sold together), and coil pack as your friend already suggested. When there is excessive moisture in the air, making an electrical connection between two materials (as is what happens in a distributor) becomes more difficult. Normally this is not an issue because the distributor cap and rotor are in close enough proximity to transmit the charge, but as those contacts wear over time it becomes more difficult for the electricity to bridge that gap (thanks SolarMike for the correction).
Check the distributor and the sensors on the throttle body (mass air flow, throttle position, etc). You can put dielectric grease on their electronic connectors and around the parts to keep moisture from getting in there.
I highly recommend getting a cheap OBDII scan tool like this one - http://amzn.to/2F9m1Jo - that connects to your sell phone with a $3 app. The ECU/PCM should tell you what is wrong and why it is not starting. That should work fine on your '99.
