A visibility of 2 3/8 miles is reported as:

When reporting visibility in aviation weather observations, distances are typically rounded to the nearest quarter mile. In the case of 2 3/8 miles, the correct approach is to consider how this measurement translates into the standard format used in weather reporting.

2 3/8 miles falls between 2 1/4 and 2 1/2 miles. When rounding to the nearest quarter mile for reporting, we look at the fraction. Since 3/8 is closer to 1/4 than it is to 1/2, it gets rounded down to 2 1/4 miles (2.25 miles) instead of rounding up to 2 1/2 miles (2.5 miles).

This rounding convention ensures consistency in weather reports and helps pilots and other aviation professionals quickly interpret visibility conditions. Therefore, when a visibility of 2 3/8 miles is reported, it would correctly be reported as 2 1/4 statute miles (SM).