Historical weather data, all-time temperature records, and monthly climate averages for Waipio, HI. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5th in Waipio runs warm and wet — expect a 79% chance of rain with typical highs around 76°. The warmest this date has ever seen was 79° back in 1940, so today's likely to land right in that familiar range.
Waipio's climate is remarkably stable, but the extremes tell an interesting story: the all-time high of 91° came in October 1946, while the record low of 52° hit just a few months later in January 1947. The wettest single day on record dumped 7.71 inches back in January 1949 — a reminder that Hawaiian rain can be relentless.
Waipio stays pleasantly mild year-round, with average highs swinging only about 9 degrees between the coolest week in early March (75°) and the warmest stretch in late September (84°). If you're chasing sun and warmth, aim for summer through early fall. Winter is wetter, peaking around late December with nearly 1.72 inches of rain in an average week.