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
January is the coldest month in Dublin, with highs of 8.3°C and lows of 3.7°C. Rain falls on about 12.8 days. It scores 1.5 and our verdict is avoid. Cold, grey and wet days make touring the countryside hard work. Go only if you want a city break and don't mind the weather.
9°C / 4°C · 13 rain days · 5.4 h sun · sea 8°C
February is still cold, with highs of 9.1°C and lows of 4°C. Expect rain on about 12.9 days. It scores 2 and our verdict is avoid, because it is too chilly and damp to enjoy time outdoors. If you must travel now, plan mostly indoor sightseeing.
10°C / 4°C · 15 rain days · 7.1 h sun · sea 8°C
March warms a little, to highs of 10.1°C, but it is wet. Rain falls on about 14.5 days and totals 80 mm. It scores 2.7 and our verdict is avoid. Walks and coastal drives are often spoiled by rain and wind, so wait a month if you can.
12°C / 6°C · 12 rain days · 9.2 h sun · sea 11°C
April is when Ireland starts to become worth a trip. Highs reach 11.6°C and rain falls on about 12.1 days, the fewest of any month. It scores 4.5 and our verdict is ok. Bring warm layers and a waterproof jacket, as it is still cool.
15°C / 9°C · 13 rain days · 11.0 h sun · sea 14°C
May is noticeably milder, with highs of 14.9°C and lows of 8.6°C. Rain falls on about 12.7 days. It scores 5.9 and our verdict is ok, and it is a sensible choice if you want pleasant weather before the peak months. Pack a rain jacket all the same.
18°C / 11°C · 13 rain days · 11.4 h sun · sea 16°C
June is a good time to go. Highs reach 17.6°C and rain falls on about 13.3 days. It is the sunniest month in our data and scores 7.2, with a verdict of good. It is one of the best months for hiking, cycling and road trips.
19°C / 13°C · 15 rain days · 10.1 h sun · sea 17°C
July is the warmest month, with highs of 19.2°C and lows of 13.1°C. It also has the most rain days, about 15.1, so showers are likely. It still scores 7.1 and our verdict is good. Sea temperatures reach 16.6°C, which suits only hardy swimmers.
19°C / 13°C · 13 rain days · 9.7 h sun · sea 17°C
August has the top score of the year, 7.3, and our verdict is good. Highs are 18.9°C and rain falls on about 13.2 days. The sea is at its warmest, around 17.2°C. It is a strong choice for outdoor plans, but bring a waterproof.
17°C / 11°C · 13 rain days · 8.2 h sun · sea 16°C
September stays mild, with highs of 16.9°C and lows of 11.2°C. Rain falls on about 12.7 days, though the monthly total rises to 83 mm. It scores 6.7 and our verdict is good. It is a good option if you want summer-like weather a little later in the year.
14°C / 9°C · 14 rain days · 6.2 h sun · sea 14°C
October cools to highs of 14.1°C and gets wetter. Rain falls on about 14 days and totals 88 mm. It scores 4.5 and our verdict is ok. You can still travel well, but expect more rain and plan some indoor options.
11°C / 6°C · 13 rain days · 4.5 h sun · sea 11°C
November is a poor time to go. Highs drop to 10.7°C, rain falls on about 12.7 days, and the total reaches 87 mm. It scores 2.6 and our verdict is avoid. Wet, dull days make walks and scenic drives much less rewarding.
10°C / 5°C · 15 rain days · 3.3 h sun · sea 9°C
December is the worst month in our data, with a score of 1.4 and a verdict of avoid. It is the wettest month, with about 15 rain days and 95 mm of rain. It also has the least sunshine. Highs are 9.5°C. Only go if a winter city break is your plan.
By trip type
City sightseeing
June and August suit city breaks best. In Dublin, June averages highs of 17.6°C and 11.4 hours of sun, while August is warmer at 18.9°C. Both still see about 13 rain days, so pack a raincoat.
Beach
July and August are the only realistic beach months. Dublin highs reach about 19°C, but the sea stays cool at 16.6°C in July and 17.2°C in August. Expect a quick swim rather than long days in the water.
Hiking & nature
May and June are best for hiking. Dublin gets 11 to 11.4 hours of sun, highs of 14.9°C to 17.6°C and less rain than later months: 65 mm in May and 73 mm in June.
Keep planning
FAQ
August is the best month, with June a close second. Based on Dublin weather from 2015–2024, August scores 7.3 out of 10 and June scores 7.2. August has highs of 18.9°C and the warmest sea at 17.2°C. June has the most sunshine of the year, at 11.4 hours, and less rain than August: 73 mm against 82 mm.
Yes, July is a good month, with a score of 7.1. It is the warmest month in Dublin, with highs of 19.2°C and lows of 13.1°C. The downside is rain. July has 15.1 rain days, one of the highest counts of the year. Pack a rain jacket even in summer.
Yes, September is still a good month, with a score of 6.7. Dublin highs average 16.9°C and the sea is still 15.8°C. Rain days drop to 12.7, but total rain rises to 83 mm, and sunshine falls to 8.2 hours. After September, conditions get worse quickly. October scores only 4.5.
No, it is best to avoid both months if weather matters to you. December scores 1.4 and January scores 1.5, the lowest of the year. December is the wettest month in Dublin, with 95 mm of rain over 15 rain days and just 3.3 hours of sunshine. January is cold, with highs of 8.3°C and lows of 3.7°C.
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