Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Oregon to Marshall Islands as you normally would.
In terms of precipitation, rainfall in Marshall Islands ranges from 7.0 - 14.2 inches per month. October is typically the wettest month, when rainfall can reach 14.2 in. February is typically the driest time to visit Marshall Islands when rainfall is around 7.0 in.
If weather is an important factor for your trip to Marshall Islands, use this chart to help with planning. For those seeking warmer temperatures, May is the ideal time of year to visit, when temperatures reach an average of 82.4 F. Travelers looking to avoid the cold should look outside of March, when temperatures are typically at their lowest (around 32.0 F).