The strange thing is that it just stopped for a while then came back full level and then went off again. Now that it is dry it is working without issues.You don't just lose signal, when you can see it raining, you can also lose signal due to rain, or other obstuctions, between your dish, and the satellite. You can reduce this problem, by getting the maximum signal, from the satellite, by peaking the signal, getting a bigger dish, or better quality cable, and LNB, both of which can deteriorate, over time.
What are your signal quality readings, at various times of the day, week, month, during different weather conditions?