First time i visited hawaii was december( week before christmas), it was grey, pouring down, with streams flowing down the streets. we were in the hawaiian regent hotel, right on waikiki beach and went to bed with a heavy heart, paradise i don't think so.. woke up day after and opened the blinds to PERFECTION. Absolutely beautiful. Ive been twice since and actually watched A cloud drop some rain on the beach before sailing away, in an otherwise cloudless sky. ive been to many countries and although my first impression of hawaii wasn't what i expected i still considered it paradise. bon voyage.
Hot . Temperatures well in to 70s
Some showers particularly near the mountains but rarely last long.
I got the following after 30 secs on the internet:- We have a saying in the islands... "If you don't like the weather where you are, just drive a few miles and it's bound to change." The islands each have a "dry" side and a "wet" side. In addition, temperature can vary greatly with elevation. For example, the temperature may be in the 80's in Kona and as cool as 45 degrees at the 4000ft elevation on the slopes of Kilauea Volcano. If you venture as high as the observatories on The Big Island, you may even see snow!
When packing for your Hawaiian vacation, take into consideration where you'll be going. Kauai, for example boasts the "wetest spot on earth" as well as the sun drenched pink sand beaches of Poipu. In addition to a wet side / dry side, you will also be exposed to wind in some places, especially on the eastern (windward) side of each island and also wherever one of the many volcanoes fail to block the wind... such as on the Kohala Coast on the Big Island.
To deal with the variety of weather, it is a good idea to pack light clothing that can be "layered" to keep you warm should you venture to higher altitudes. Of course, you should bring plenty of swim wear, casual shorts, light shirts or blouses - as it is usually warm along the coast... but seldom does it get uncomfortably hot. Temperatures in most of the visitor destinations range between 70 and 85 degrees year round and only rarely get into the 90's or as low as the 60's. Hawaii is truly a "tropical weather paradise".