Matthew 16:1-4
1 Now the Pharisees and Sadducees came up, and testing Jesus [to get something to use against Him], they asked Him to show them a sign from heaven [which would support His divine authority].
2 But He replied to them, “When it is evening, you say, ‘It will be fair weather, for the sky is red.’ 3 And in the morning, ‘It will be stormy today, for the sky is red and has a threatening look.’ You know how to interpret the appearance of the sky, but cannot interpret the signs of the times? 4 An evil and [morally] unfaithful generation craves a [miraculous] sign; but no sign will be given to it, except the sign of [the prophet] Jonah.” Then He left them and went away.
Luke 12:54-56
54 He also said to the crowds, “When you see a cloud rising in the west, you immediately say, ‘It is going to rain,’ and that is how it turns out. 55 And when [you see that] a south wind is blowing, you say, ‘It will be a hot day,’ and it happens. 56 You hypocrites (play-actors, pretenders)! You know how to analyze and intelligently interpret the appearance of the earth and sky [to forecast the weather], but why do you not intelligently interpret this present time?