This was usually around St Swithin's day when it was said that if it rained then it would rain for the next 40 days. One such page was on 14 July 1927 where readers were urged to buy a Kendall's umbrella in exchange for a 'free' Kendella Weather House.
On St Swithin's day, if it rained, it would rain for the next 40 days. One specific case is from July 14, 1927, where readers were directed to buy a Kendall's umbrella in exchange for a 'free' Kendella Weather House.