Choose a double-digit row (10 and higher) for your best chance to be in the shade or to be in the shade earlier. For a 1pm game, very few rows will be covered completely. There are 13 rows in Section 215 and 23 in sections 216-218. The concourse entrance is behind the last row as well, so the farther back you are, the closer you will be to concessions and restrooms.
Photo Credit: Adapted from flickr user gorbould
Other Seats in the Shade
For more shade on the 200 and 300 levels at Yankee Stadium, please see: Where is the best shade on the 200 or 300 level of Yankee Stadium?