Historical weather data, all-time temperature records, and monthly climate averages for Hālawa, HI. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5th in Hālawa typically lands right in the sweet spot of spring — expect a high around 82° and a low near 68°, with only a 1-in-4 chance of rain. This date's all-time high of 88° was set just this year in 2025, while the coldest it's ever gotten on this date was 61° back in 1966.
Hālawa's weather is famously mild, but the extremes tell an interesting story — the mercury has reached 95° (August 2019) and dipped as low as 52° (January 1969), a range of just 43 degrees over 86 years of records. The wettest single day on record dumped a remarkable 15.32 inches of rain on March 5, 1958.
Hālawa is warm year-round, with average highs staying between 80° in January and 88° at peak summer in late July and August — a remarkably narrow range for any destination. If you're chasing the driest weather, aim for late spring through summer; the wettest stretch falls in mid-to-late December, averaging 0.82 inches of rain per week.