Honolulu Weather In January
Honolulu Weather In January sees a higher chance of rain than, say, the middle of summer, but it is still what most people would consider low. The daily temperatures are warm, with a normal high of 80°F, and anything below 60 at night would be freakish.
So you can pack for Honolulu like it is the middle of summer in most of the rest of the United State, with a bathing suits and shorts. All summer outdoor activities are possible.