Hyetal

• (a.) Of or pertaining to rain; descriptive of the distribution of rain, or of rainy regions.
Found on http://thinkexist.com/dictionary/meaning/hyetal/

Hyetal

Hy'e·tal adjective [ Greek ... rain, from ... to rain.] Of or pertaining to rain; descriptive of the distribution of rain, or of rainy regions.
Found on http://www.encyclo.co.uk/webster/H/78

hyetal

rainy; of, like or pertaining to rainfall
Found on http://phrontistery.info/h.html
No exact match found