Planning for the weather is a good way to make your trip to Limerick relaxing and enjoyable, especially when you're splurging. The hottest months are usually July and August, with an average temperature of 18°C, while the coldest months are February and January, with an average of -9°C. The snowiest months in Limerick are February, April, November and March, with each month seeing an average of 35 cm of snowfall.