When planning your Road to Hana trip, carefully consider the weather forecast for Hana and the windward Haleakala area. Hana Picnic Co. always has the very latest weather updates so check with them before you set out. Of course everyone would prefer a sunny day, on the Road to Hana the weather makes a huge difference, and the scenery is vastly better in the sun, however, you can always buy one of the inexpensive rain ponchos at Hana Picnic if in doubt.