Tuesday the UK will experience a surge of very warm air from the continent.
Like last week when highs hit 29C temperatures look set to remain way above the norm for this time of year.
We thought last week was the last minute blast of summer, but September seems to be showing off.
Tomorrow we may well see temperatures exceed 30C. We could even see highs of 32C.
The last times we had temperatures of over 30C at this time of year were in 2013 and 2006.
If temperatures do reach 32C, then that would be our hottest September day on record since 1961 a 55 year wait!
In fact, most record-breaking September warmth was pre-1950, so this is long overdue!