Historical weather data, all-time temperature records, and monthly climate averages for Honolulu, HI. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5th in Honolulu is about as close to perfect as weather gets — 56 years of data puts the average high at 82° with a low of 68°. There's a 32% chance of a passing shower, though the thermometer has swung anywhere from a balmy 88° (1983) to a surprisingly cool 58° low back in 1966.
Honolulu's weather is famously mild, but the record books still hold a few surprises. The all-time high of 97° hit on September 24, 2019, and the coldest ever recorded was a shocking 43° on January 18, 2009 — both extremes that feel almost impossible for the islands. A single day in December 1967 dumped 8.21 inches of rain, a reminder that the tropics play by their own rules.
Honolulu barely has seasons — monthly average highs range just seven degrees all year, from 81° in January to a peak of 88° in August. If you want the warmest and driest stretch, aim for mid-July through September; if you want to avoid rain, skip the last week of December, which averages over an inch of precipitation. Honestly, though, any time of year is a reasonable bet.