The Met Office has issued a weather warning for parts of Wales.
Heavy rain is forecast to arrive later in the day, and it looks like it is going to stay for much of the week.
South Wales and Pembrokeshire are the worst affected areas of Wales with a yellow warning of rain.
Other parts of the UK have been issued a more severe amber warning.
Last week, homes and businesses were flooded in Wales after overnight flash floods.
The Met Office forecast for Wales says: "There should some bright spells this morning (Monday) but also scattered showers, some of which could turn heavy and thundery.
"It is then set to turn cloudier with outbreaks of persistent and locally heavy rain spreading from the east. It will be a wet night away from the far west with heavy and persistent rain, and strengthening winds."
It is also going to feel cool with temperatures around 14C. The forecast for Tuesday is for more heavy rain affecting all parts and it will "feel cool, especially in a brisk wind."
Although, Wales is going to be slightly better than the east of England which is forecast to see a month's worth of rain in certain places.
The Met Office has issued four yellow severe weather warnings for rain up until Thursday, mainly to the east of the UK, saying that affected areas could see local flooding and disruption to transport.
On Monday morning, it was upgraded to an amber warning.
Forecaster Steven Keates warned that heavier and more persistent rain is likely to hit southern and eastern England on Monday afternoon.
The Met Office outlook for Wales from Wednesday to Friday is not much better, with forecasters saying: "There will be further wet and windy weather on Wednesday.
"Staying unsettled thereafter with further showers or longer spells of rain, and only limited brightness. Staying cool throughout."
What a difference to this time last year when forecasters were predicting the UK-wide heatwave that saw temperatures soar into the 30s.
