For Biblical concerns about using astrology, see Below Q and A:

Q: Isn't astrology forbidden by the Bible?
A: There are no statements in the Bible expressly forbidding the correct practice of astrology. However, there are statements decrying the worship of the Sun and Moon as Gods and idols.These are two separate concepts. Most astrologers do not worship the Sun or Moon as Gods (but you may first wish to inquire if this concerns you).

The first page of the Bible, King James version, states "And God said, Let there be lights in the firmament of the heaven to divide the day and the night; and let them be for signs, and for seasons, and for days, and years."
Genesis 1:14

Jesus never spoke against astrologers. In fact, he came in under a special star. The first three persons to visit him and give him gifts were the "Magi" - astrologers guided by this star! Jesus is claimed in the Gospels to have departed this plane  exactly at the time of an eclipse and that he predicted his own return under heavenly signs. His followers used the sign of the fish, the symbol of the new Age of Pisces, thought to be marked by his coming. 

Through the Renaissance, the Church accepted "Natural" uses of astrology. Fifteen Popes either were astrologers or studied the sacred art. Many of our current astrological house systems were developed by Catholic monks.

Today's Christian railings against astrologers occurred  because astrology is ignorantly tarred with the same brush as professions that are denounced in the Bible. This may have occurred because of the word "occult", meaning "hidden" being attached to astrology as well as to the Biblically denounced professions.

To denounce astrology as "occult" is as silly as denouncing x-ray machines or seismic sensors as "occult". We all seek to see deeper into hidden energies to gain wider information.