Ireland Weather by Month: Temperature & Rainfall Guide

Many people wonder what the weather conditions are in Ireland over the year. What is the best time to visit Ireland?

This page shows the average weather conditions by month in Ireland over the year in: January, February, March, April, May, June, July, August, September, October, November, December.

In January the weather in Ireland is generally less favorable. January is a winter month. The average maximum daytime temperatures are low and range from 8°C (46°F) in Donegal to 11°C (52°F) in Portmagee. On average, this month is the coldest month of the year in Ireland.

Find more detailed climate information for Ireland in January here.

In February the weather in Ireland is generally less favorable. February is a winter month. In Dublin you can expect cold maximum average daytime temperatures around 10°C (50°F) and nighttime temperatures around 4°C (39°F).

Find more detailed climate information for Ireland in February here.

In March the weather in Ireland ranges from less favorable in Kenmare to mixed in Dublin. The average maximum daytime temperatures are low and range from 10°C (50°F) in Greencastle to 12°C (54°F) in Ballybunion.

Find more detailed climate information for Ireland in March here.

In April the weather in Ireland ranges from less favorable in Killarney to good in Galway. The temperatures range from low in Greencastle with 11°C (52°F) to moderate in Galway with 14°C (57°F).

Find more detailed climate information for Ireland in April here.

In May the weather in Ireland ranges from mixed in Kenmare to good in Dublin. The average maximum daytime temperatures are moderate and range from 13°C (55°F) in Greencastle to 16°C (61°F) in Tullamore.

Find more detailed climate information for Ireland in May here.

In June the weather in Ireland ranges from mixed in Doolin to very good in Dublin. June is a summer month. The temperatures range from moderate in Greencastle with 15°C (59°F) to pleasant in Navan with 19°C (66°F).

Find more detailed climate information for Ireland in June here.

In July the weather in Ireland ranges from mixed in Renvyle to excellent in Dublin. July is a summer month. The temperatures range from moderate in Greencastle with 16°C (61°F) to pleasant in Slane with 20°C (68°F). On average, this month is the warmest month of the year in Ireland.

Find more detailed climate information for Ireland in July here.

In August the weather in Ireland ranges from good in Killarney to excellent in Dublin. August is a summer month. The temperatures range from moderate in Greencastle with 17°C (63°F) to pleasant in Drogheda with 20°C (68°F).

Find more detailed climate information for Ireland in August here.

In September the weather in Ireland ranges from mixed in Westport to very good in Dublin. The temperatures range from moderate in Greencastle with 16°C (61°F) to pleasant in Drogheda with 18°C (64°F).

Find more detailed climate information for Ireland in September here.

In October the weather in Ireland ranges from mixed in Killarney to good in Dublin. In Dublin you can expect mild maximum average daytime temperatures around 15°C (59°F) and nighttime temperatures around 9°C (48°F).

Find more detailed climate information for Ireland in October here.

In November the weather in Ireland ranges from less favorable in Killarney to mixed in Dublin. The temperatures range from low in Ballybofey with 11°C (52°F) to moderate in Rosslare with 13°C (55°F).

Find more detailed climate information for Ireland in November here.

In December the weather in Ireland is generally less favorable. December is a winter month. The average maximum daytime temperatures are low and range from 9°C (48°F) in Laghy to 11°C (52°F) in Portmagee.

Find more detailed climate information for Ireland in December here.