All of this assumes no wind. A ten mile an hour wind towards the batter will decrease the flight to 370 feet, while a wind away from the batter will increase the flight to 430 feet. Then we have to take into account the atmospheric pressure. A dropping of pressure of only an inch, will add about five feet of flight to the ball. The game can be affected by other weather conditions.
Wind can be a problem.
In the 1961 All Star Game in Candlestick Park, Baltimore Orioles pitcher Stu Miller was blown off the mound by a gust of wind. After the two teams arrived, flooding from a ten inch rainfall closed all the roads around the stadium. Rainouts can also affect the outcome of important games. In the 1911 World Series, game four was delayed from October 18th, to the 24th. That meant that future hall of famer, Christy Mathewson was up in the rotation to pitch for the Giants.