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Let go over what you know…
1 Cylinders misfires
2 Changed the spark plugs and changed the engine air filter
3 Code came up for cylinder 1
4 Cleaned the mass air flow sensor
5 Stopped raining for several days and the misfires disappeared after a few days
6 Then it rained and the problems came back
7 Changed all the ignition coils, blew out the spark plug wells for good measure
8 It rained again and I received more misfires
Fair to say the issue is moisture being the root cause of your issue not failing or failed ignition component(s)
Willing to suggest your issue is water intrusion in another area.
I would perhaps start looking at the wiring, connectors, connections.
There may be another possibility, that a different component is becoming faulty when exposed to moisture thus affecting the ignition system.
Possibly a cam or crank sensor or associated wiring.
You could try spraying water at a specific area and see when or if it causes a miss fire to narrow your search.