Weather by month for Dublin, the best months to go and how Ireland's regions differ, scored from 10 years of climate data.
Jul, Aug
The highest month scores: comfortable temperatures, little rain and plenty of sun.
Highs 19°C · 13–15 rain days
Jun, Sep
Still good weather, just not quite the top months.
Highs 17°C to 18°C · 13 rain days
Jan, Feb, Mar, Nov, Dec
The weakest weather of the year: too hot, too cold or too wet.
Highs 8°C to 11°C · 13–15 rain days
Weather by month
Average highs and lows, rain days, sunshine, sea temperature and our month score out of 10.
| Month | High / low | Rain days | Sunshine | Sea temp | Score |
|---|---|---|---|---|---|
| January | 8°C / 4°C | 13 days (63 mm) | 4.1 h/day | 7°C | 1.5/10 |
| February | 9°C / 4°C | 13 days (66 mm) | 5.4 h/day | 8°C | 2.1/10 |
| March | 10°C / 4°C | 15 days (80 mm) | 7.1 h/day | 8°C | 2.9/10 |
| April | 12°C / 6°C | 12 days (63 mm) | 9.2 h/day | 11°C | 4.6/10 |
| May | 15°C / 9°C | 13 days (65 mm) | 11.0 h/day | 14°C | 5.9/10 |
| June | 18°C / 11°C | 13 days (73 mm) | 11.4 h/day | 16°C | 6.9/10 |
| Best month: July | 19°C / 13°C | 15 days (79 mm) | 10.1 h/day | 17°C | 7.0/10 |
| Best month: August | 19°C / 13°C | 13 days (82 mm) | 9.7 h/day | 17°C | 7.1/10 |
| September | 17°C / 11°C | 13 days (83 mm) | 8.2 h/day | 16°C | 6.4/10 |
| October | 14°C / 9°C | 14 days (88 mm) | 6.2 h/day | 14°C | 4.6/10 |
| November | 11°C / 6°C | 13 days (87 mm) | 4.5 h/day | 11°C | 2.6/10 |
| December | 10°C / 5°C | 15 days (95 mm) | 3.3 h/day | 9°C | 1.6/10 |
Figures for Dublin; the country's best months are weighted across its cities. Best months are highlighted. How we score months
Month by month
8°C / 4°C · 13 rain days · 4.1 h sun · sea 7°C
Days are cold and short, with highs of 8.3°C and only 4.1 hours of sun. Rain falls on about 13 days. The score is low at 1.5, a tough month weather-wise. New Year's Day starts the month, and Saint Brigid's Day closes it on 2 February's eve.
9°C / 4°C · 13 rain days · 5.4 h sun · sea 8°C
Highs creep up slightly to 9.1°C with 5.4 hours of sun daily, but rain still falls on nearly 13 days. The score of 2.1 keeps this an off-season month. Saint Brigid's Day falls on 2 February, marking the start of spring in the Irish calendar.
10°C / 4°C · 15 rain days · 7.1 h sun · sea 8°C
Highs reach 10.1°C but rain days jump to 14.5, among the wettest patterns of the year. The score of 2.9 still rates it as tough going. Saint Patrick's Day on 17 March brings parades and crowds despite the unsettled weather.
12°C / 6°C · 12 rain days · 9.2 h sun · sea 11°C
Conditions improve: highs of 11.6°C, sun hours rise to 9.2, and rain days drop to 12.1, among the lower counts of the year. The score of 4.6 marks this as an ok month to visit. Good Friday and Easter Monday fall in early April, adding holiday traffic.
15°C / 9°C · 13 rain days · 11.0 h sun · sea 14°C
Highs climb to 14.9°C and sun hours reach 11, while rain days stay moderate at 12.7. The score of 5.9 makes this a solid ok choice. May Day on 4 May adds a long weekend for local travel.
18°C / 11°C · 13 rain days · 11.4 h sun · sea 16°C
Summer arrives properly: highs of 17.6°C, sea temperature up to 16.1°C, and 11.4 hours of sun. Rain still falls on about 13 days, so pack a jacket. The score of 6.9 rates June as a good month overall, helped by the June Holiday on 1 June.
19°C / 13°C · 15 rain days · 10.1 h sun · sea 17°C
This is one of the warmest months, with highs of 19.2°C and sea temperature at 16.6°C. Rain days rise to 15.1, the wettest spell of summer, so showers are common even in good weather. The score of 7 keeps July rated good.
19°C / 13°C · 13 rain days · 9.7 h sun · sea 17°C
Highs stay near summer peak at 18.9°C with sea temperature topping out at 17.2°C, the warmest of the year. Rain days ease slightly to 13.2, though total rainfall of 82mm is among the highest. The score of 7.1 makes August the top-rated month, and the August Holiday falls on 3 August.
17°C / 11°C · 13 rain days · 8.2 h sun · sea 16°C
Highs drop to 16.9°C but sun hours hold at 8.2, and sea temperature stays mild at 15.8°C. Rain days are lower at 12.7, giving a decent balance of warmth and lighter rain. The score of 6.4 keeps September rated good.
14°C / 9°C · 14 rain days · 6.2 h sun · sea 14°C
Highs fall to 14.1°C and sun hours drop to 6.2, while rain days climb to 14 with 88mm of rainfall, the start of the wetter season. The score of 4.6 rates it as ok rather than ideal. The October Holiday on 26 October gives a long weekend before darker months set in.
11°C / 6°C · 13 rain days · 4.5 h sun · sea 11°C
Highs drop to 10.7°C with sun hours down to 4.5, and rain falls on about 13 days. The score of 2.6 marks November as a tough weather month, with short daylight and persistent damp conditions.
10°C / 5°C · 15 rain days · 3.3 h sun · sea 9°C
This is the wettest month, with 95mm of rain across 15 rain days and just 3.3 hours of sun. Highs reach only 9.5°C. The score of 1.6 is the lowest of the year, though Christmas Day on 25 December and St. Stephen's Day on 26 December bring festive events despite the weather.
Regional differences
Average daytime high each month, coloured by that city's own month score.
| City | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dublin | 8°C | 9°C | 10°C | 12°C | 15°C | 18°C | 19°C | 19°C | 17°C | 14°C | 11°C | 10°C |
| Galway | 8°C | 9°C | 10°C | 13°C | 15°C | 17°C | 18°C | 18°C | 17°C | 14°C | 11°C | 9°C |
| Kilkenny | 8°C | 9°C | 10°C | 12°C | 15°C | 18°C | 19°C | 19°C | 17°C | 14°C | 10°C | 9°C |
| Killarney | 9°C | 9°C | 10°C | 13°C | 16°C | 18°C | 19°C | 18°C | 17°C | 14°C | 11°C | 10°C |
| Westport | 8°C | 9°C | 10°C | 12°C | 15°C | 16°C | 17°C | 17°C | 16°C | 13°C | 10°C | 9°C |
Best Good OK Tough weather
By trip type
City sightseeing
June and August are the best months for city trips in Dublin. Highs reach 17.6°C to 18.9°C, with 9.7 to 11.4 sun hours a day, making it comfortable to walk around and sit outside.
Beach
July and August suit the coast best. Sea temperatures peak at 16.6°C to 17.2°C and air highs sit near 19°C, though rain still falls on 13 to 15 days each month.
Hiking & nature
May and June are ideal for hiking. Highs of 14.9°C to 17.6°C, around 11 sun hours a day, and only 12.7 to 13.3 rain days make trails more pleasant and drier underfoot.
Events calendar
Public holidays: New Year's Day (1 Jan)
Public holidays: Saint Brigid's Day (2 Feb)
Public holidays: Saint Patrick's Day (17 Mar)
Public holidays: Good Friday (3 Apr), Easter Monday (6 Apr)
Public holidays: May Day (4 May)
Public holidays: June Holiday (1 Jun)
Public holidays: August Holiday (3 Aug)
Public holidays: October Holiday (26 Oct)
Public holidays: Christmas Day (25 Dec), St. Stephen's Day (26 Dec)
Keep planning
FAQ
Yes, August is one of the best months to visit Ireland, with a score of 7.1 out of 10. Dublin highs reach 18.9°C and sea temperatures peak at 17.2°C, the warmest of the year. There are still 13.2 rain days and 82mm of rain, so pack a waterproof jacket even in summer.
Yes, July scores 7.0 out of 10 and is one of the two best months, alongside August. Dublin highs hit 19.2°C, the warmest daytime temperature of the year, with 10.1 hours of sun a day. July is also one of the wetter summer months, with 15.1 rain days and 79mm of rainfall.
No, January scores just 1.5 out of 10, the lowest of the year. Dublin highs only reach 8.3°C and lows drop to 3.7°C, with 12.8 rain days and just 4.1 hours of sunshine a day. The sea is also at its coldest, around 7.2°C, so this month suits travellers happy with cold, grey winter conditions rather than beach weather.
October is an okay time to visit, scoring 4.6 out of 10. Dublin highs cool to 14.1°C and rainfall rises to 88mm over 14 rain days, the highest rain total of the year. Sunshine drops to 6.2 hours a day, so expect shorter, wetter days as autumn sets in.
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