Back when I was a kid growing up in Norway, we would fly in the rain all the time. Of course, in Norway it could rain for weeks on end, so if you were waiting for sunny days not much flying would happend. Also, 99.9% of the time, it will rain in Norway without any lightning.

As mentioned above, we would put the transmitter in a plastic bag to protect it from the rain.

Now, living in Texas, I will land and pack up as soon as it starts to rain. Here 99.9% of the time rain means lightning as well[], and wait an hour or so and it will be sunny again

-tychoc