Are grass type moves weakened by rain?

Question

I know Fire type moves are, but I don't know about grass :\

Answer 1

No grass type moves are not weakend by rain.
Source: Personal Experience

Answer 2

No, grass moves are not weakened by the rain, the only moves weakened by rain are fire moves ( weakened by 1.5), moonlight,synthesis, Morning sun, and solarbeam's power is reduced by half

Comments

solarbeam isn't reduced