Honolulu is one of the warmest places in Hawaii, the lowest that temperatures ever drop is normally around the mid-sixties. As you would expect there is sunshine year round but it isn’t unbearably hot. During March there is the occasional rain shower and May to October are typically the driest. months. Let's just say Hawaii is a good idea all year round.
When to Visit
Anytime is a great time to go on a hawaiian getaway, but for the best hotel deals book sometime in Mid-April to Early June or September-mid-December. Unless you're a surfer, avoid visiting during surfing season which runs December until early April. Hotel rates are at their highest and the beaches are taken over by surfers and tournaments.
Honolulu has plenty of amazing places to explore but you might also want to venture out of the city and see the rest of the island. Ride-share apps and taxis are available but the most cost effective way to get around is to rent a car. If you are walking around in Honolulu beware that its illegal to use electronic devices while walking.