Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Tennessee to Muscat as you normally would.
In terms of precipitation, rainfall in Muscat ranges from 0.4 - 1.2 inches per month. February is typically the wettest month, when rainfall can reach 1.2 in. January is typically the driest time to visit Muscat when rainfall is around 0.4 in.
If weather is an important factor for your trip to Muscat, use this chart to help with planning. For those seeking warmer temperatures, June is the ideal time of year to visit, when temperatures reach an average of 95.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 69.8 F).