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 poor. 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 poor. 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 poor in Kenmare to unpleasant 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 poor in Killarney to tolerable 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 unpleasant in Kenmare to tolerable 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 unpleasant in Doolin to pleasant 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 unpleasant in Renvyle to perfect 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 tolerable in Killarney to perfect 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 unpleasant in Westport to pleasant 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 unpleasant in Killarney to tolerable 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 poor in Killarney to unpleasant 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 poor. 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.