Dublin is warmest in August, averaging 18° by day and 12° at night. The wettest month is August with 130 mm, and the year brings about 1117 mm in total.
Month by month
| Month | High | Low | Rain | Sea | Daylight | Good for |
|---|---|---|---|---|---|---|
| January | 8° | 4° | 81 mm | 9° | 7.8 h | Cool |
| February | 9° | 4° | 95 mm | 8° | 9.5 h | Cool |
| March | 10° | 4° | 84 mm | 8° | 11.5 h | Cool |
| April | 11° | 6° | 57 mm | 9° | 13.7 h | Cool |
| May | 14° | 8° | 62 mm | 11° | 15.6 h | Mild |
| June | 17° | 11° | 60 mm | 14° | 16.7 h | Sightseeing |
| July | 18° | 12° | 105 mm | 15° | 16.3 h | Sightseeing |
| August | 18° | 12° | 130 mm | 16° | 14.6 h | Mild |
| September | 17° | 11° | 105 mm | 15° | 12.4 h | Mild |
| October | 14° | 9° | 124 mm | 14° | 10.2 h | Mild |
| November | 11° | 7° | 87 mm | 12° | 8.3 h | Cool |
| December | 9° | 5° | 127 mm | 10° | 7.3 h | Cool |
High and low are average daily maximum and minimum, rain is typical monthly total, sea is the average surface temperature, daylight is the hours between sunrise and sunset mid-month. Climate normals from NASA POWER and NOAA MUR — averages, not promises.
When to go
Beach weather: No month in Dublin combines swimming warmth with dry skies.
Walking the city: June and July — highs of 17–18° and no more than 105 mm of rain a month.