There's a warning of difficult driving conditions and localised flooding in the Shannonside region this evening.
Met Eireann says there will also be poor visibility and a chance of thunderstorms.
A status yellow rain warning will be in place until 9 o'clock tonight in Leitrim and Roscommon - and until 6 o'clock this evening in Longford.
Roscommon farmer and councillor, Laurence Fallon, says it's not a big blow for farmers after a dry spell: