The words and lyrics of the nursery rhyme 'When the wind is in the east' reflects the belief that the weather can be predicted. There are several rhymes of this nature, some of which also have significant historical relevance such as:

If Candlemas day (2 February) be dry and fair
If St Paul's day (29 June) be fair and clear
St. Swithin's day if thou dost rain
 

When the Wind is in the East
Nursery Rhyme lyrics, origins and history

When the wind is in the east,
'Tis neither good for man nor beast;
When the wind is in the north,
The skilful Asher goes not forth;
When the wind is in the south,
It blows the bait in the fishes' mouth;
When the wind is in the west,
Then 'tis at the very best.

When the Wind is in the East
Nursery Rhyme lyrics, origins and history