Average Yearly Rainfall for Hawaii

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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. Most locations also have information on the number of days with wet weather. That includes the days when precipitation amounts to 0.01 inches (0.25 millimetres) or more.

The annual precipitation totals are averages based on weather data collected from 1981 to 2010 for the NOAA National Climatic Data Center.

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 and Opihihale in Kona District on the east coast. Naalehu is at the island's south end, while Puukohola Heiau and Upolu Point are 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
290 Hawaii Volcanoes Park 102.7 2608
272 Hilo 126.7 3219
  – Kailua Kona 18.4   467
268 Kapoho Beach 82.2 2087
  – Mauna Loa Observatory 24.6   625
  – Naalehu 48.7 1238
148 Opihihale 36.6   929
  40 Puukohola Heiau 10.6   269
180 Upolu Point 32.9   836

Kauai

Average yearly precipitation
Days Place Inches Millimetres
247 Kilauea 68.6 1741
195 Lihue 37.1   941
  92 Makaweli 23.0   585
  51 Mana 22.7   577
264 Princeville Ranch 77.8 1975
  49 Waimea 21.8   553

Lanai

Yearly averages for total rainfall
Days Place Inches Millimetres
  49 Lanai Airport 15.6   396
  – Lanai City 28.3   719

Maui

Precipitation information for Maui includes Kapalua and Puukolii in West Maui, along with 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
135 Haleakala National Park 49.7 1263
252 Hana 79.2 2012
  95 Kahului 17.8   453
156 Kapalua 29.0   737
  77 Kula 23.3   591
  82 Makena State Park 17.2   438
270 Ohe'o Gulch Pools 84.0 2134
  – Puukolii 25.5   647
125 Wailuku 33.5   851

Molokai

Yearly rainfall totals
Days Place Inches Millimetres
  – Kalaupapa 38.6   981
  – Kaunakakai 16.7   423
  99 Molokai Airport 24.7   627

Oahu

Total precipitation for one year
Days Place Inches Millimetres
  89 Honolulu 17.1   434
199 Kahuku 35.6   903
236 Kaneohe 52.9 1344
126 Waikiki 22.4   568
184 Waimanalo 43.3 1099
247 Waimea Falls Park 54.7 1389
Reference

National Climatic Data Center. NOAA's 1981-2010 Climate Normals.

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