As an adjective, the English word "fair" has numerous meanings, both positive and negative in usage. The same principle holds true in how "fair" has been used to translate a number of the actual Hebrew and Greek words of the Holy Scriptures, sometimes with somewhat surprising results.
"When it is evening, ye say, It will be fair weather: for the sky is red"
"Fair" was often used to describe female beauty.
"the sons of God saw the daughters of men that they were fair; and they took them wives of all which they chose" (Genesis 6:2 KJV)
"he said unto Sarai his wife, Behold now, I know that thou art a fair woman to look upon" (Genesis 12:11 KJV)
"the damsel was very fair to look upon" (Genesis 24:16 KJV)
"To bring Vashti the queen before the king with the crown royal, to show the people and the princes her beauty: for she was fair to look on." (Esther 1:11 KJV)
"Fair" was also used to describe men's appearance.
"And when the Philistine looked about, and saw David, he disdained him: for he was but a youth, and ruddy, and of a fair countenance" (1 Samuel 17:42 KJV)
"In which time Moses was born, and was exceeding fair" (Acts 7:20 KJV)
As is still the case today, "fair" weather is considered good (while the word "fair" is often used in other ways to describe something that is less than good i.e. fair, good, excellent)
"Fair weather cometh out of the north" (Job 37:22 KJV)
"He answered and said unto them, When it is evening, ye say, It will be fair weather: for the sky is red. And in the morning, It will be foul weather to day: for the sky is red and lowering" (Matthew 16:2-3 KJV)
Perhaps the most surprising use of the word "fair" in the Bible refers to how "fair" speaking means deception i.e. "when he speaketh fair, believe him not." The modern day equivalent to that may be "smooth talking."
"With her much fair speech she caused him to yield" (Proverbs 7:21 KJV)
"When he speaketh fair, believe him not: for there are seven abominations in his heart." (Proverbs 26:25 KJV)
"For even thy brethren, and the house of thy father, even they have dealt treacherously with thee; yea, they have called a multitude after thee: believe them not, though they speak fair words unto thee" (Jeremiah 12:6 KJV)
"For they that are such serve not our Lord Jesus Christ, but their own belly; and by good words and fair speeches deceive the hearts of the simple" (Romans 16:18 KJV)
"Fair" was also often used to describe things with very good or excellent quality.
"a very fair heifer" (Jeremiah 46:20 KJV)
"fair jewels of my gold and of my silver" (Ezekiel 16:17 KJV)
"a cedar in Lebanon with fair branches" (Ezekiel 31:3 KJV)
"their countenances appeared fairer and fatter in flesh than all the children which did eat the portion of the king's meat" (Daniel 1:15 KJV)
"The leaves thereof were fair, and the fruit thereof much" (Daniel 4:12 KJV)
"And I said, Let them set a fair mitre upon his head" (Zechariah 3:5 KJV)
Fact Finder: How was a port called Fair Havens involved in a very stormy voyage for the apostle Paul?
See Fair Havens