Kahului, Hawaii Breaks All-Time Monthly Rainfall Record With 19.92 Inches in March 2026, Surpassing 1916 Mark With 10 Days Still Remaining
KAHULUI, HI — With more than a week still left in the month, Kahului Airport in Hawaii has already recorded its wettest month in history, setting a new all-time rainfall record that could climb even higher before March ends.
According to the latest precipitation data, Kahului has measured 19.92 inches of rain so far in March 2026, surpassing every previous one-month total in the station’s historical record, which dates back to 1905.
What makes the milestone even more remarkable: 10 days remain in the month that could add to the already record-breaking total.
Breaking a Record That Stood for Over a Century
The previous record for wettest month at Kahului Airport was:
- 17.52 inches, set in January 1916
That mark stood for more than 110 years.
Now, with 19.92 inches already logged — and the month incomplete — March 2026 has firmly claimed the top spot.
Top 10 Wettest Months on Record at Kahului AP
- 19.92 inches — March 2026 (10 days remaining)
- 17.52 inches — January 1916
- 14.46 inches — January 1980
- 14.29 inches — April 1989
- 13.66 inches — January 1971
- 10.90 inches — March 1967
- 10.21 inches — December 1996
- 10.19 inches — December 1988
- 9.78 inches — March 2021
- 9.61 inches — March 2015
The data show that the new record has exceeded the previous mark by more than 2.4 inches — and counting.
Historic Context
Kahului’s period of record runs from January 1, 1905, through March 21, 2026, meaning this new benchmark is being set against more than 120 years of weather observations.
Notably, several of the wettest months in history occurred in January, traditionally one of Hawaii’s wetter periods. But this March has outperformed them all.
What 19.92 Inches Means
Nearly 20 inches of rain in less than a month represents an extraordinary volume for the region. For perspective, many mainland U.S. cities do not see that much rainfall in an entire season.
With 10 days left in March, any additional rainfall will push the record even further beyond the historic January 1916 benchmark.
Will the Total Climb Even Higher?
Forecast patterns will determine whether March 2026 becomes not just the wettest month — but one that sets a mark that stands for decades.
Regardless of what happens over the final stretch, the record has already been broken.
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