Dublin Airport recorded a staggering 170mm of rain in November, its highest for the month since 2002.
It was the darkest November at the airport since 1983, with just 41.3 hours of sunshine.
Although the east was the wettest location, the highest amount of rain in one day was at Cork Airport when 33.7mm on rain fell on November 20.
Last month, every station across Ireland also experienced temperatures lower than the average recorded between 1981 and 2010.
Met Eireann's monthly weather statement reads: "Most of November was unsettled with low pressure dominating.
"Frontal depressions developed over Ireland as they moved in from the Atlantic on numerous occasions throughout the month.
"Several of them became slow moving, giving large amounts of rainfall, especially in the East.
"The first four days of the month saw a complex area of low pressure positioned directly over the country with bands of rain or showers circulating around it.
"There was a gap on the 5th, before low pressure moved in again on the 6th.
"This was the constant theme throughout the month; all the while, the East of the country bore the brunt of the rain in a cyclonic easterly flow off the Irish Sea.
"There were a few relatively dry periods in between the low pressure systems, especially between the 15th and 18th and again for the last few days of the month as high pressure moved in.
"The track of the frontal depressions lead to the South and especially the East receiving the bulk of the rain while the Northwest had a relatively drier month."
