Currently, September is the cheapest month in which you can book a flight from Portland, Maine to China (average of $1,199). Flying from Portland, Maine to China in June is currently the most expensive (average of $1,791). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Portland, Maine to China as you normally would.
In terms of precipitation, rainfall in China ranges from 1.2 - 10.2 inches per month. May is typically the wettest month, when rainfall can reach 10.2 in. December is typically the driest time to visit China when rainfall is around 1.2 in.
If weather is an important factor for your trip to China, 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 82.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 57.2 F).