Highest temperature in Miami on September 10?

What this question means

Miami on 10 September is close to a coin flip between two brackets: 90-91°F at 44% and 88-89°F at 39%, with 92-93°F at 10% and 86-87°F at 6% either side.

Like the Dallas question on this board, this one uses two-degree Fahrenheit buckets rather than single degrees, which changes how the numbers should be read — a bucket collects more probability than a single value, so a 44% peak here is less confident than it looks next to a one-degree question.

What the near-tie says is that the underlying forecast sits close to the boundary between brackets. When a distribution splits almost evenly across two adjacent ranges, the most likely single outcome is a temperature near the line dividing them, and the question becomes a rounding problem rather than a weather one.

Subtropical late summer is a stable regime, which is why the tails fall away so quickly beyond those four brackets.