In section 124, rows 33-38 are under cover. Blowing rain and wind may find its way into your seats, otherwise you should be safe from precipitation in row 34.
Corner sections on the 100 level of Arrowhead Stadium contain 38 rows of seats with the section entrance at the top row of each section. These corner seats are a great way to get a good lower level seat without paying the high price of a seat at midfield.
The best corner sections are those with the best angle towards midfield, like 113 and 125 on the Chiefs side and 107 and 130 on the visitor side. The comfortable sitelines and low ticket price (often 50% lower than sideline seats) make these some of the best value if you want to sit in the 100 level.
When trying to choose the best row in the corner, it's a tough choice. You'll find better views in higher rows (like 30 and above), but the front rows are very close to the field and the atmosphere is difficult to match.
In between sections 113 and 114 is the player tunnel; fans in these sections will have a great opportunity to get close to the players as they run onto the field.