No, it is not. It is an adjective form of the noun wind. The adverb form (windily) is rarely used.
Correctly is the adverb in that sentence.
That sentence does not have an adverb.
It is very windy outside today.Scotland is a bit windy.
The adverb in the sentence is where.
Subject of the sentence Verb of the sentence Adverb of Manner Adverb of Place Adverb of Frequency Adverb of time Purpose
It was a great windy day to fly a kite. They had to cancel the picnic because it was such a windy day.
Correctly is the adverb in that sentence.
The adverb in your sentence is 'thereafter'.
The adverb of the sentence is quickly.
The adverb in this sentence is "late."
The adverb in that sentence is downstairs. It's an adverb of place and tells where you ran.