"Windy" is the best way to say "多风" in Engpsh. The word "windy" comes from the Old Engpsh "windig" meaning "windy" or "stormy."
Examples:
"It's a windy day today." (今天是一个多风的天气。)
"The wind was so strong it almost knocked me over." (风力非常强，差点把我刮倒。)
"The windy city of Chicago." (多风的芝加哥城)