Matthew 16:1-4
1 The Pharisees and Sadducees approached, and as a test, asked Him to show them a sign from heaven.
2 He answered them: “When evening comes you say, ‘It will be good weather because the sky is red.’ 3 And in the morning, ‘Today will be stormy because the sky is red and threatening.’ You know how to read the appearance of the sky, but you can’t read the signs of the times. 4 An evil and adulterous generation demands a sign, but no sign will be given to it except the sign of 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, right away you say, ‘A storm is coming,’ and so it does. 55 And when the south wind is blowing, you say, ‘It’s going to be a scorcher!’ and it is. 56 Hypocrites! You know how to interpret the appearance of the earth and the sky, but why don’t you know how to interpret this time?