July brings 20°C daytime highs, 57mm of precipitation across about 12 wet days and 16.2 hours of daylight — best for hiking, cycling and long light evenings. The strongest run of the year is June to August. January is the quietest month: short days, quiet streets, and still good for quiet and local.
Long-run climate normals for Dublin. Month ratings compare months within Dublin only — they are not a ranking of Dublin against other destinations, and they are not a forecast for a specific year.
Last updated: · Live forecast data refreshes hourly.
| Best month | July — Hiking, Cycling, Long light evenings |
| Best 3-month window | June–August |
| Quietest month | January — Short days, quiet streets |
| Driest month | February — 52mm |
| Wettest month | October — 77mm |
| Warmest / coolest | July 20°C / February 8°C |
| Seasonality | Strongly seasonal — the months feel like different places |
| Annual rainfall | 758mm over roughly 163 rain days |
January gets roughly 23% more precipitation than July — 70mm against 57mm. That difference, more than temperature, is what changes how a day here feels.
Daytime highs only move 12°C across the whole year (8–20°C), so timing matters far less here than rainfall does.
June gives you 16.7 hours of daylight against just 7.3 in December — a 9-hour difference in how much you can actually fit into a day.
February is the driest month at 52mm across roughly 11 wet days, while October peaks at 77mm.
June is almost as good as July, but usually quieter and cheaper. If your dates are flexible, it is the easier trip.
Dublin changes character completely through the year — July and January are effectively two different destinations. Pick the month that matches what you want to do, not the highest-rated one.
Ratings compare months within Dublin, not against destinations worldwide: five stars means the best time to be here, not that Dublin beats anywhere else. Tags describe what the conditions actually suit.
| Month | Rating | High / Low | Precipitation | Wet days | Sun | Daylight | Best for |
|---|---|---|---|---|---|---|---|
| January | ★★☆☆☆ | 8°C / 3°C | 70mm | 15 | 5h | 7.8h | Quiet and local |
| February | ★★☆☆☆ | 8°C / 3°C | 52mm | 11 | 3h | 9.5h | Low-angle light · Quiet and local |
| March | ★★★☆☆ | 10°C / 4°C | 54mm | 11 | 5h | 11.6h | Spring greenery |
| April | ★★★★☆ | 12°C / 6°C | 54mm | 11 | 6h | 13.8h | Spring greenery |
| May | ★★★★☆ | 16°C / 9°C | 60mm | 13 | 6h | 15.7h | Hiking · Cycling · Spring greenery |
| June | ★★★★★ | 18°C / 11°C | 67mm | 14 | 11h | 16.7h | Hiking · Cycling · Long light evenings |
| July | ★★★★★ | 20°C / 12°C | 57mm | 12 | 11h | 16.2h | Hiking · Cycling · Long light evenings |
| August | ★★★★★ | 20°C / 12°C | 74mm | 16 | 11h | 14.5h | All-round conditions |
| September | ★★★★☆ | 18°C / 11°C | 61mm | 13 | 7h | 12.4h | Hiking · Cycling · Autumn colour |
| October | ★★★☆☆ | 16°C / 9°C | 77mm | 16 | 6h | 10.2h | Autumn colour · Low-angle light |
| November | ★★☆☆☆ | 12°C / 6°C | 73mm | 15 | 4h | 8.3h | Autumn colour · Quiet and local |
| December | ★★☆☆☆ | 10°C / 4°C | 72mm | 15 | 3h | 7.3h | Festive season · Quiet and local |
| You are planning | Pick | Why |
|---|---|---|
| Sun & beach days | July | 11h daily sunshine, 20°C highs and only 12 rain days. |
| City walking & sightseeing | July | 20°C highs with 16.2h of daylight — long days without heat fatigue. |
| Photography & light | July | 11h of sun and 16.2h daylight give the widest window for golden-hour work. |
| Value & fewer crowds | May | Scores 61/100 — close to peak conditions but outside the busiest window. |
| Cooler-weather travel | May | 16°C highs and 9°C nights suit anyone who dislikes heat. |
Each month in Dublin is described from long-run climate normals and then rated relative to the other eleven months in the same city. A five-star January in a cold destination means January is one of the best times to be there — not that it beats a Mediterranean summer.
| Factor | Weight | What it measures |
|---|---|---|
| Temperature | Described | Average daytime high and overnight low for the month, shown as measured rather than judged. |
| Precipitation | Described | Monthly millimetres and wet-day count, labelled as snow or rain/snow where temperatures make that the likely phase. |
| Sunshine & daylight | Described | Average daily sunshine hours and astronomical daylight length at mid-month, from the city’s latitude. |
| “Best for” tags | Derived | Applied only when the conditions genuinely support the activity — snow depth-friendly cold for skiing, 13–24°C and low rain risk for hiking, dark evenings at high latitude for aurora. A month with few strong use cases gets fewer tags rather than padded ones. |
| Star rating | Relative | Ranks the month against the other eleven months in the same city. Never a comparison between cities. |
Figures are long-run climate averages, not a forecast for a specific year. Where a month lacks sourced rainfall or humidity, the value is modelled from temperature range and rain frequency.
July is the best all-round month in Dublin: 20°C highs, 57mm of precipitation and 16.2 hours of daylight, which suits hiking, cycling and long light evenings. The strongest three-month window is June to August.
January — 8°C highs, 70mm of precipitation over roughly 15 days and 7.8 hours of daylight. It is the cheapest and least crowded time to go, and it still works for quiet and local.
February is the driest month at 52mm over about 11 rain days, against 77mm in October. Across the year Dublin records around 758mm.
Yes, but the months are genuinely different trips. July suits hiking, cycling and long light evenings, while January suits quiet and local. Pick the month that matches what you want to do.
Daylight ranges from 7.3 hours in December to 16.7 hours in June, calculated from the city's latitude.