Dublin weather by month & the best time to visit
Ireland · city break · oceanic / maritime climate
The best time to visit Dublin is July — its sunniest month (Sunshine Score 60/100), with August close behind. Dublin averages about 1,488 hours of sunshine a year. Daytime highs around 18°C / 64°F and roughly 80 mm of rain in July.
When is the best time to visit Dublin?
For sunshine, the best time to visit Dublin is July, then August. The dullest month is January (0/100, 86 mm of rain). The full month-by-month picture is in the table below.
How sunny is Dublin?
Dublin isn't a sunny place by world standards: about 1,488 hours of sunshine a year. 60 Sunshine Score points separate July (60) from January (0), so the month you pick matters. It ranks #2 of 10 destinations in Ireland for annual sunshine, above the national median of 1,418 hours. The year's 982 mm of rain spreads fairly evenly across the months, with no pronounced dry season.
Sunshine Score by month
| Month | Score | Day high | Night low | Rain | UV | Sea |
|---|---|---|---|---|---|---|
| January | 0 | 7° / 45°F | 4° / 39°F | 86 mm | 0 | 7° / 45°F |
| February | 0 | 7° / 45°F | 4° / 39°F | 70 mm | 1 | 8° / 46°F |
| March | 6 | 9° / 48°F | 4° / 39°F | 70 mm | 2 | 8° / 46°F |
| April | 19 | 11° / 52°F | 6° / 43°F | 61 mm | 3 | 10° / 50°F |
| May | 37 | 14° / 57°F | 8° / 46°F | 67 mm | 5 | 14° / 57°F |
| June | 49 | 16° / 61°F | 11° / 52°F | 76 mm | 5 | 15° / 59°F |
| July | 60 | 18° / 64°F | 12° / 54°F | 80 mm | 5 | 16° / 61°F |
| August | 59 | 18° / 64°F | 12° / 54°F | 91 mm | 4 | 17° / 63°F |
| September | 49 | 16° / 61°F | 11° / 52°F | 76 mm | 3 | 16° / 61°F |
| October | 28 | 13° / 55°F | 9° / 48°F | 102 mm | 2 | 13° / 55°F |
| November | 11 | 10° / 50°F | 6° / 43°F | 106 mm | 1 | 12° / 54°F |
| December | 0 | 8° / 46°F | 5° / 41°F | 97 mm | 0 | 8° / 46°F |
Sea temperature in Dublin by month
The sea off Dublin is warmest in August at around 17°C / 63°F, and coolest in January at 7°C / 45°F. It never reaches comfortable swimming temperatures (21°C+). Month-by-month sea-surface temperatures are in the Sea column of the table above.
Nearest destinations
Head-to-head
How Dublin compares month by month: Dublin vs Belfast · Dublin vs Cork · Dublin vs Shannon · Dublin vs Castletown · all comparisons
Dublin: questions and answers
What kind of destination is Dublin?
Dublin is a city break in Ireland with a oceanic / maritime climate — the sea reaches 17°C at its warmest.
How many hours of sunshine does Dublin get a year?
Dublin gets about 1,488 hours of sunshine a year, at its best around July.
When is the best time to visit Dublin?
The sunniest time to visit Dublin is July, when the Sunshine Score peaks at 60/100 (with August close behind). Expect daytime highs around 18°C / 64°F.
What is the least sunny month in Dublin?
January is the least sunny month in Dublin, scoring 0/100 with about 86 mm of rain.
What is the sea temperature in Dublin?
The sea in Dublin ranges from about 7°C (January) to 17°C (August). Month-by-month sea temperatures are on this page.
How strong is the sun in Dublin?
The typical midday UV index in Dublin peaks around 5 (moderate) in May, easing to about 0 (low) in January. Month-by-month midday UV values are in the UV column of the table on this page.
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