Mercury - Will be the brightest in the evening sky from January 26 to February 16.
Venus - Brightest in the evening sky and most ideal angle from the sun on March 24th and April 27
Mars - Brightest in the night sky from September 29 to October 28. Will rise over the eastern horizon after 10:15 pm. Mars will be at opposition on October 13. 2020 is a great year to view mars as its closest to earth as it will ever be (this happens every 2 years).
Jupiter - Brightest in the evening sky July 11 to July 16. Jupiter will be at opposition on July 14.
Saturn - Brightest in the evening sky July 4 to August 9. Saturn will be at opposition on July 20.
Uranus - Visible in the night sky August 24 to December 31. Brightest on its opposition on Halloween, October 21. Some will call this the year of the Great Hallowanus.
Neptune - Visible in the night sky from July 16 to November 5. Will be brightest on its opposition on September 11.
For additional 2020 planet viewing details, go here.