You have probably heard the
expression, "Red
sky at
night,
shepherd's
delight; red sky in the
morning, shepherd's
warning." This suggests that if there is a red
sunset then the following day will bring fine
weather, whereas if the
dawn is accompanied by a red sky then the day will not be very pleasant.
Then there is the saying, "The north
wind doth blow and we shall have
snow." This is not always true, of course, but it does indicate quite correctly that bad weather often accompanies a wind from the north.
If you see a
halo around the
moon on a clear night this is said to be an infallible sign that there is wet weather to come. Of course, in
Britain and
Europe, this is very likely to be true because the weather is so variable anyway. In fact, the halo around the moon occurs when there is a certain type of cloud present that often precedes
rain.