Reykjavík or Dublin in July?
On climate data, Dublin comes out ahead overall in July. See the per-criterion details below.
ReykjavíkPhoto: rheins · CC BY 3.0
DublinPhoto: Holger Uwe Schmitt · CC BY-SA 4.0Key figures in July
| Criterion | Reykjavík | Dublin |
|---|---|---|
| Average daily high | 13 °C | 18 °C |
| Average daily low | 9 °C | 12 °C |
| Sea | 11 °C | 15 °C ★ |
| Rainy days | 16 rainy days (est.) ★ | 17 rainy days (est.) |
| Sun | 6 h/day | 6 h/day |
| Humidity | 84 % | 85 % |
Winner by travel type
Trade-offs
- Dublin is about 5 °C warmer by day.
- The sea at Dublin is about 4 °C warmer.
Reykjavík or Dublin in July: the short answer
In July, Dublin comes out ahead on the overall climate score (Reykjavík 31/100 vs Dublin 44/100). That is a snapshot of one month, though — which one truly fits depends on what you want from the trip, so the breakdown below goes criterion by criterion.
This comparison focuses on July as a representative month for the pair; for any other month, use each destination's month-by-month pages. Across the whole year Reykjavík averages a climate score of 18/100, Dublin 29/100. Both profiles below are historical monthly averages, not a forecast.
Weather in July, side by side
The average daily high is about 13 °C in Reykjavík and 18 °C in Dublin — warmer in Dublin. Average daily lows are around 9 °C versus 12 °C.
On rain, Reykjavík sees about 16 rainy days in July and Dublin about 17 — drier in Reykjavík. Sunshine is comparable (6 vs 6 hours a day).
Sea temperature and swimming
In July the water is about 11 °C at Reykjavík and 15 °C at Dublin — warmer for swimming at Dublin. Neither Reykjavík nor Dublin reaches the ~21 °C swimming threshold in any month. Peak sea warmth is August for Reykjavík and August for Dublin.
Rain and sun across the year
Over a full year Reykjavík records roughly 224 rainy days and Dublin about 188 — the drier of the two overall is Dublin. At their sunniest, Reykjavík reaches about 6 hours of sun a day (June) and Dublin about 6 (June). If dependable dry, sunny weather is your top priority, weigh these annual totals alongside the single month above.
Best time to visit each
Climatically, Reykjavík has no month that stands clearly above the rest, while Dublin has no clear standout month. If your dates are fixed, pick the destination whose strong season overlaps them; if you are flexible, plan around these windows.
Which suits which kind of trip
Based on the July scores for each travel style:
Beach & swimming: Dublin scores higher in July (Reykjavík 19 vs Dublin 30).
City breaks: Dublin scores higher in July (Reykjavík 52 vs Dublin 68).
Active & hiking: Dublin scores higher in July (Reykjavík 48 vs Dublin 64).
Family: Dublin scores higher in July (Reykjavík 18 vs Dublin 27).
Verdict: which should you pick?
In July, Dublin leads across every scored category here — the overall score and each travel type — so on the climate data it is the clearer pick this month. Over the year, Dublin carries the higher overall climate score. Your own priority (sun, sea, low rain or sightseeing comfort) still matters, and the month-by-month pages for each destination give you the full picture before you book.