June brings 17°C daytime highs, 75mm of precipitation across about 14 wet days and 16.7 hours of daylight — best for hiking, cycling and long light evenings. The strongest run of the year is June to August. December is the quietest month: wetter, but peaceful, and still good for festive season and quiet and local.
Long-run climate normals for Cliffs of Moher. Month ratings compare months within Cliffs of Moher only — they are not a ranking of Cliffs of Moher against other destinations, and they are not a forecast for a specific year.
Last updated: · Live forecast data refreshes hourly.
| Best month | June — Hiking, Cycling, Long light evenings |
| Best 3-month window | June–August |
| Quietest month | December — Wetter, but peaceful |
| Driest month | May — 70mm |
| Wettest month | December — 135mm |
| Warmest / coolest | July 18°C / February 9°C |
| Seasonality | Fairly even across the year |
| Annual rainfall | 1200mm over roughly 225 rain days |
December gets roughly 80% more precipitation than June — 135mm against 75mm. That difference, more than temperature, is what changes how a day here feels.
Daytime highs only move 9°C across the whole year (9–18°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.
May is the driest month at 70mm across roughly 13 wet days, while December peaks at 135mm.
July is almost as good as June, but usually quieter and cheaper. If your dates are flexible, it is the easier trip.
Cliffs of Moher stays fairly consistent all year, so there is no month you need to avoid. What you plan to do matters more than when you go.
Ratings compare months within Cliffs of Moher, not against destinations worldwide: five stars means the best time to be here, not that Cliffs of Moher beats anywhere else. Tags describe what the conditions actually suit.
| Month | Rating | High / Low | Precipitation | Wet days | Sun | Daylight | Best for |
|---|---|---|---|---|---|---|---|
| January | ★★☆☆☆ | 9°C / 5°C | 120mm | 23 | 5h | 7.9h | Quiet and local |
| February | ★★☆☆☆ | 9°C / 5°C | 90mm | 17 | 3h | 9.5h | Low-angle light · Quiet and local |
| March | ★★☆☆☆ | 10°C / 6°C | 95mm | 18 | 5h | 11.6h | Spring greenery · Quiet and local |
| April | ★★★★☆ | 12°C / 7°C | 75mm | 14 | 6h | 13.8h | Spring greenery |
| May | ★★★★☆ | 15°C / 9°C | 70mm | 13 | 6h | 15.7h | Hiking · Cycling · Spring greenery |
| June | ★★★★★ | 17°C / 10°C | 75mm | 14 | 11h | 16.7h | Hiking · Cycling · Long light evenings |
| July | ★★★★★ | 18°C / 11°C | 80mm | 15 | 11h | 16.1h | Long light evenings |
| August | ★★★★★ | 18°C / 11°C | 95mm | 18 | 11h | 14.5h | All-round conditions |
| September | ★★★★☆ | 17°C / 10°C | 100mm | 19 | 7h | 12.4h | Autumn colour |
| October | ★★★☆☆ | 15°C / 9°C | 130mm | 25 | 6h | 10.2h | Autumn colour · Low-angle light |
| November | ★★☆☆☆ | 12°C / 7°C | 125mm | 24 | 4h | 8.3h | Autumn colour · Quiet and local |
| December | ★★☆☆☆ | 10°C / 6°C | 135mm | 26 | 3h | 7.3h | Festive season · Quiet and local |
| You are planning | Pick | Why |
|---|---|---|
| Sun & beach days | June | 11h daily sunshine, 17°C highs and only 14 rain days. |
| City walking & sightseeing | May | 15°C highs with 15.7h of daylight — long days without heat fatigue. |
| Photography & light | June | 11h of sun and 16.7h daylight give the widest window for golden-hour work. |
| Value & fewer crowds | May | Scores 59/100 — close to peak conditions but outside the busiest window. |
| Cooler-weather travel | May | 15°C highs and 9°C nights suit anyone who dislikes heat. |
Each month in Cliffs of Moher 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.
June is the best all-round month in Cliffs of Moher: 17°C highs, 75mm of precipitation and 16.7 hours of daylight, which suits hiking, cycling and long light evenings. The strongest three-month window is June to August.
December — 10°C highs, 135mm of precipitation over roughly 26 days and 7.3 hours of daylight. It is the cheapest and least crowded time to go, and it still works for festive season and quiet and local.
May is the driest month at 70mm over about 13 rain days, against 135mm in December. Across the year Cliffs of Moher records around 1200mm.
Yes — conditions in Cliffs of Moher stay fairly even all year, so there is no month you need to avoid. What you plan to do matters more than when you go.
Daylight ranges from 7.3 hours in December to 16.7 hours in June, calculated from the city's latitude.