Average Yearly Rainfall for Hawaii

The tables below give yearly averages for rainfall at cities, towns, resorts, parks and beaches in Hawaii.

Each place has a total for the amount of precipitation it usually receives in a year. There is also a count of the number of days with wet weather, when precipitation amounts to 0.01 inches (0.25 millimetres) or more.

The annual precipitation totals are averages based on weather data collected from 1991 to 2020 for the US National Centers for Environmental Information.

You can jump to a separate table for each island: Hawaii Big Island, Kauai, Lanai, Maui, Molokai and Oahu

Hawaii Big Island

Places with weather information on Hawaii's Big Island include Kailua Kona in South Kona and Puukohola Heiau in the Kohala region at the north end. Plus there are rainfall data from two stations high on the slopes of mountains: the Hawaii Volcanoes Park Visitor Center at 3,970 feet (1,210 metres) and the Mauna Loa Slope Observatory at 11,152 feet (3,399 metres) elevation.

Average annual rainfall

Days	Place	Inches	Milli­metres
295	Hawaii Volcanoes Park	96.2	2444
273	Hilo	120.4	3058
50	Kailua Kona	9.9	251
281	Kapoho Beach	81.5	2070
56	Mauna Loa Observatory	14.3	363
148	Opihihale	36.2	918
39	Puukohola Heiau	9.0	228

Kauai

Average yearly precipitation

Days	Place	Inches	Milli­metres
67	Barking Sands	17.8	453
259	Kilauea	61.3	1557
193	Lihue	36.2	920
98	Makaweli	23.4	594
266	Princeville Ranch	75.2	1909

Lanai

Yearly averages for total rainfall

Days	Place	Inches	Milli­metres
54	Lanai Airport	15.7	399

Maui

Precipitation information for Maui include Kaanapali and Kapalua in West Maui, Makena on the South Shore, and Hana and Ohe'o Gulch Pools at the island's east end. The weather station in Haleakala National Park is located 6,959 feet (2,121 metres) up the mountain.

Average amount of rain a year

Days	Place	Inches	Milli­metres
130	Haleakala	42.3	1073
83	Kaanapali	23.3	593
93	Kahului	16.2	412
160	Kapalua	27.8	705
87	Kula	23.0	584
82	Makena State Park	17.2	436
263	Ohe'o Gulch Pools	77.3	1963
83	Puukolii	23.3	593

Molokai

Yearly rainfall totals

Days	Place	Inches	Milli­metres
30	Kaunakakai	12.3	311
106	Molokai Airport	21.7	552

Oahu

Total precipitation for one year

Days	Place	Inches	Milli­metres
86	Ewa Beach	17.1	433
89	Honolulu	16.4	417
192	Kahuku	32.6	828
238	Kaneohe	50.9	1293
123	Waikiki	20.7	525
169	Waimanalo	42.4	1078
260	Waimea Falls Park	52.0	1321