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Rainfall totals Hilo, HI

For Hilo, the station record shows 104.99 inches of rain for the year to date in 2026. The normal for the same date is 71.71 inches.

Data from Hilo International Airport, with records back to 1949.

Days with measurable rain, 2026

Days with measurable rain in Hilo during 2026, newest first
DateRainfall
Aug 19, 20260.03 inches
Aug 17, 20260.72 inches
Aug 16, 20265.83 inches
Aug 15, 20266.82 inches
Aug 14, 20261.53 inches
Aug 13, 20260.15 inches
Aug 12, 20260.04 inches
Aug 10, 20260.01 inches
Aug 9, 20260.79 inches
Aug 8, 20260.85 inches
Aug 7, 20260.04 inches
Aug 6, 20260.02 inches
Aug 4, 20260.03 inches
Aug 3, 20260.34 inches
Aug 2, 20260.34 inches
Aug 1, 20260.06 inches
Jul 31, 20260.56 inches
Jul 29, 20260.03 inches
Jul 28, 20260.05 inches
Jul 27, 20260.32 inches
Jul 26, 20260.02 inches
Jul 25, 20261.49 inches
Jul 24, 20260.18 inches
Jul 23, 20260.22 inches
Jul 22, 20260.05 inches
Jul 21, 20260.38 inches
Jul 20, 20260.30 inches
Jul 19, 20260.06 inches
Jul 18, 20260.06 inches
Jul 17, 20261.01 inches

Through Aug 19, 2026, the GHCN-Daily station record shows 104.99 inches of measurable rain so far this year, falling over a 187-day span. Station observations are from GHCN-Daily, with a 1-3 day lag and quality checks by NOAA.

All-time rainfall records

All-time rainfall records for Hilo since 1949
Wettest day16.87 inchesFeb 20, 1979
Wettest year211.22 inches1990
Driest year58.74 inches2025
Average year124.34 inches76 complete years on record
Rain days a year276average, 0.01 inch or more
Record begins194928,045 daily readings

Monthly rainfall normals

Average monthly rainfall for Hilo, 1991 to 2020
MonthJanFebMarAprMayJunJulAugSepOctNovDecYear
Inches7.8610.2212.689.406.997.309.2411.308.7010.2414.3912.07120.39

Averages are 1991-2020 normals from NCEI.

Under 17 U.S.C. 105, no copyright attaches to the government-produced figures on this page, including reports, alerts, station observations, and normals, which were created by the National Weather Service and other NOAA offices. The notice that 17 U.S.C. 403 requires appears in this sentence. It does not imply endorsement by or affiliation with those agencies. See: Data sources and attribution.

All Hawaii rainfall totals