Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Phoenix Sky Harbor Intl Airport to Manama as you normally would.
In terms of precipitation, rainfall in Manama ranges from 0.0 - 0.4 inches per month. January is typically the wettest month, when rainfall can reach 0.4 in. April is typically the driest time to visit Manama when rainfall is around 0.0 in.
If weather is an important factor for your trip to Manama, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 93.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 60.8 F).