A yellow rainfall warning has been issued for the whole country. Picture: Met Eireann

Met Eireann have issued a yellow weather warning for the entire country, which will be in effect all day Friday until 3am on Saturday morning.

The warning says: “Heavy thundery downpours will give high totals of rainfall in short spaces of time today/early tonight leading to localized spot flooding.”

Met Eireann say that Friday will be warm and humid with temperatures of 19 to 21 degrees in Dublin, but there will be a risk of local flooding.

“[Friday] morning will be wet. The rain will heavy at times. The rain will clear to showers in the afternoon, some very heavy and thundery, with a risk of local flooding. Becoming warm and humid with highest temperatures of 19 to 21 degrees.

“Light variable or south-easterly winds will veer moderate south-westerly, but fresh and gusty in the South,” the forecast for Friday reads.

On Saturday, there will be brighter, sunnier weather, though there will be some showers throughout the day.

Met Eireann say: “On Saturday, we can expect bright, sunny spells. While it will be mainly dry, there will be some scattered showers in the west. Highest temperatures around 16 to 21 degrees with moderate, mainly westerly breezes. Saturday night will be dry with lowest temperatures of 11 to 14 degrees.”

There will be outbreaks of rain on Sunday, with temperatures ranging between 18 and 22 degrees, with Met Eireann predicting a ‘humid night’ on Sunday.

“Sunday will see outbreaks of rain, possibly turning heavy in the west and north with the best chance of dry and bright weather in the east,” say Met Eireann.

“Highest temperatures of 18 to 22 degrees in fresh southerly winds. A humid night will follow rain will affecting many areas during the night.”