There is few information
about the specific weather of the Deepingdale:
1 – “...except the season of snows…”[1].
It indicates the existence of a seasson that snows in the Deepingdale.
2 – “So damp a landi s much given to mists. “Faerie time” in Deepingdale is
when mist lies like a ghostly shroud low over the land. When the fog hangs so,
a mounted ridar can see over it, but she drops down into its concealing
confines if she descends from her saddle”[2].
3
– The Elminster’s Ecologies has a map (p.266) of the levels of precipitation in
the Dalelands whose the selected cut shows the region of the Deepingdale: