Two pieces of weather lore will be given a test this week. One around St Swithun's Day is set to fail as it always does whereas the other which suggests a British summer is typified by three fine days and a thunderstorm may well prove true - in sentiment at least, if not to the letter.
Several parts of the UK saw dry weather on St Swithun's Day yesterday. According to the weather lore this means those places should stay dry for forty days and forty nights. That's already gone wrong in many places with outbreaks of rain in the north and west this morning.
Further south and east though the heat and humidity is building and, over the next few days there will be more sunny spells, before heavy thundery showers break out particularly on Saturday. This sequence of weather will give some truth to the 'three fine days and a thunderstorm' saying and Saturday may well be the hottest day of the year.
There are lots of ideas around these Get Ready for Summer pages for things to do in the very different types of summer weather we expect over the next few days. There will be some warm sunny weather to get out and about and enjoy. Equally, some may find the heat and humidity uncomfortable but, if that's the case, there's advice on what to do from NHS Choices.
Any really heavy showers over the weekend have the potential to disrupt transport and produce localised flooding. If that's the case you'll need to look at advice from the Environment Agency, SEPA, the Highways Agency, National Rail Enquiriesor your airline.
Whatever you are doing, make the most of it, by staying in touch with Met Office forecasts and warnings.
Keeping it chilled.
Ideas to help you stay fit and healthy
Britain is full of great places to explore.
The summer months mean extra opportunities for entertaining.