Dublin is home to moderate temperatures. The summertime is the liveliest time in the city and the festivals fill the streets, making it the peak season. The city sees extremely cold winters and very few tourists. Winters are considered as the off season.
The best time to visit Dublin is during the summer months. However, if you wish to avoid the high prices and the summer crowds, fall is a good time to visit the city. There are several events happening, fewer crowds and cheaper prices.