Matthew 16:2

When it is evening. Textual evidence may be cited (cf. p. 146) for the omission of the remainder of v. 2, beginning with these words, and all of v. 3. Luke 12:54-56 is similar in thought though somewhat different in form. The illustration is clearly one such as Christ often used, and, here in Matthew, fully appropriate to the context.

Fair weather. Jesus refers to the weather of Palestine. Wind and clouds from the Mediterranean to the west commonly brought rain, whereas wind from the Arabian Desert to the southeast meant hot, dry weather.