A set of average city temperatures in May are normally distributed with a mean of 20.66 ^\circ \text{C}20.66 ∘

C20, point, 66, degrees, start text, C, end text and a standard deviation of 2 ^\circ \text{C}2

∘

C2, degrees, start text, C, end text. The average temperature of Singapore is 26 ^\circ \text{C}26

∘

C26, degrees, start text, C, end text.

What proportion of average city temperatures are lower than that of Singapore?

You may round your answer to four decimal places.