As we’ve been working through our detailed month-by-month series to help you choose the best month for you to visit Hawaii, weather is certainly an important factor. Many times, we’ve referenced Weather.com’s excellent database of Hawaii of rainfall averages, however simply listing a single month’s rainfall data point by island, didn’t provide enough context to our liking. To remedy this issue, we’ve aggregated the rainfall data to provide a single chart.
Notes about the data:
– For simplicity, this chart only shows the four major islands. The general rainfall trend by month also applies to Lanai and Molokai. Additionally, it should be noted that rainfall levels on Lanai and Molokai will most closely match their neighbor island of Maui.
– The Big Island line for Hawaii Island is based on rainfall levels at the Kona airport. Hilo rainfall levels are significantly higher.
– Maui rainfall data is based on levels recorded at the airport in Kahului, which is not considered to be one of Maui’s major resort areas like Wailea, Lahaina, Kaanapali and Kapalua. Kahului’s rainfall tends to be a bit higher than all the major resort areas, with the exception of Hana on east Maui.
– Oahu rainfall data is based on records kept at the Honolulu airport. These levels will closely mirror Waikiki Beach, though Ko Olina will be drier and the the North Shore usually gets more rain than Honolulu.
– Kauai rainfall levels are based on data kept at the airport in Lihue. Compared to Lihue, Kauai’s North Shore receives more rain, while the South Shore is drier.
– Overall June is the driest month in Hawaii, while December is the wettest month.
– When we plotted this data, the uptick in rain from February to March was surprising. It’s not quite as dramatic when you consider that February only has 28 days and March has 31 days. Yet, when we averaged the rainfall to a per day level, March still edged out February with more rain.
If past behavior is a predictor of future behavior, you can use these rainfall trends to somewhat anticipate the type of weather you might encounter during your visit to the Hawaiian Islands.
We’ll be inserting this chart into our month-by-month analysis to help you determine the best times to visit Hawaii.