Best time to visit Cliffs of Moher

Re-score for me — drag the dial — every chart on the page recolours live for your heat limit 27°C
I'm comfortable up to 27°C feels-like
22° heat-averse 30° heat-loving

Default 27 °C is the upper edge of the Holiday Climate Index "ideal comfort" band (Scott, Rutty, Amelung & Tang, 2016). Above this, most warm-tourism travellers report measurable discomfort.

Saved to this browser. Changes update the strips below.
Recent · 2020-2024
Interest Google Trends 2021-2025 searches, not arrivals (?)
Day · avg daily high (?)
Night · avg overnight low (?)
UV index · On a typical day around midday, UV is about this (?)
1234544311
On the sunniest 1 in 10 days, UV reaches this — and even higher
64
PM2.5 air quality · on a typical day (?)
455655455445
On the worst 1 in 10 days, PM2.5 reaches this — and even higher
5881289588767
September 4/10 feels 14°C (+2°C vs 1991-2020) · HCI 44/100
Day 16° · Night 11° 77% humidity 22 km/h wind 18 rain days (235h) 170h sun
Thermal 5
Sky 4
Rain 3
Wind 9

Higher = better, including rain & wind (green = "doesn't hurt the score", not "lots of it").

How is this scored? HCI / Steadman / CCI gate — full methodology and citations below.

Compare with another destination

Add as many as you like — stacked below the main strips above. Each row is just the recent-window score strip and (for beach destinations) sea-temperature strip.

Similar climatesDingle96% · Killarney89% · Bergen87%

Other destinations with the most-alike year-round climate to Cliffs of Moher (apparent temperature, rain hours, sunshine — matched within the same trip-profile). The ±N chip compares each match's typical score for the current month against Cliffs of Moher's. Based on the 2020-2024 climatology, not this year's actual weather.

Month-by-month

Month Temp °C Feels °C Rain days Rain h Rain h/day Humidity Wind km/h Sun h UV Interest Score
Jan 4–8 4 18 275 15.3 84% 26 89 — Quiet 2
Feb 5–9 4 22 358 16.3 81% 32 94 1 Quiet 1
Mar 4–10 5 18 274 15.2 77% 27 145 2 Moderate 2
Apr 6–12 8 15 207 13.8 70% 22 198 3 Moderate 4
May 8–14 11 16 228 14.3 71% 22 248 4 Quiet 4
Jun 11–16 14 18 272 15.1 74% 22 219 5 Moderate 4
Jul 12–17 15 21 357 17.0 78% 21 213 4 Moderate 3
Aug 13–17 16 22 335 15.2 77% 23 218 4 Moderate 3
Sep 11–16 14 18 235 13.1 77% 22 170 3 Quiet 4
Oct 9–13 10 22 315 14.3 80% 26 133 1 Quiet 2
Nov 7–10 7 22 301 13.7 84% 28 90 1 Peak 2
Dec 5–8 4 22 309 14.0 86% 30 82 — Moderate 1

UV Index in Cliffs of Moher by Month

UV index in Cliffs of Moher peaks at 5 (moderate) in June, dropping to 0 (low) in January.

Best months in detail

September

4/10

11–16°C (feels 14°C) · 18 rain days (235h) · 170 sun hours · 77% humidity · Quiet crowd · UV 3 (low) · sunniest 1 in 10 days reach 4 (moderate)

May

4/10

8–14°C (feels 11°C) · 16 rain days (228h) · 248 sun hours · 71% humidity · Quiet crowd · UV 4 (moderate)

April

4/10

6–12°C (feels 8°C) · 15 rain days (207h) · 198 sun hours · 70% humidity · Moderate crowd · UV 3 (moderate)

Every month

Show the other 9 months in detail

January

2/10

4–8°C (feels 4°C) · 18 rain days (275h) · 89 sun hours · 84% humidity · Quiet crowd

February

1/10

5–9°C (feels 4°C) · 22 rain days (358h) · 94 sun hours · 81% humidity · Quiet crowd · UV 1 (low)

March

2/10

4–10°C (feels 5°C) · 18 rain days (274h) · 145 sun hours · 77% humidity · Moderate crowd · UV 2 (low)

June

4/10

11–16°C (feels 14°C) · 18 rain days (272h) · 219 sun hours · 74% humidity · Moderate crowd · UV 5 (moderate) · sunniest 1 in 10 days reach 6 (high)

July

3/10

12–17°C (feels 15°C) · 21 rain days (357h) · 213 sun hours · 78% humidity · Moderate crowd · UV 4 (moderate)

August

3/10

13–17°C (feels 16°C) · 22 rain days (335h) · 218 sun hours · 77% humidity · Moderate crowd · UV 4 (moderate)

October

2/10

9–13°C (feels 10°C) · 22 rain days (315h) · 133 sun hours · 80% humidity · Quiet crowd · UV 1 (low)

November

2/10

7–10°C (feels 7°C) · 22 rain days (301h) · 90 sun hours · 84% humidity · Peak crowd · UV 1 (low)

December

1/10

5–8°C (feels 4°C) · 22 rain days (309h) · 82 sun hours · 86% humidity · Moderate crowd

Frequently asked questions about visiting Cliffs of Moher

When is the best time to visit Cliffs of Moher?

September is the highest-scoring month (4/10 on the Holiday Climate Index). Typical conditions: 11–16°C (18 rainy days). The top three months by score are September, May, April.

What is the worst time to visit Cliffs of Moher?

February is the lowest-scoring month (1/10). Typical conditions: 5–9°C (22 rainy days).

When are crowds lowest in Cliffs of Moher?

Search-interest seasonality (Google Trends 2021-2025) is lowest in January and peaks in November. Interest tracks both in-trip visitors and lead-time planners, so treat it as a "destination is on people's minds" signal rather than literal arrivals.

What is the UV index in Cliffs of Moher by month?

UV peaks at 5 (moderate) in June and is lowest in January at 0 (low). Monthly peak values: Jan —, Feb 1, Mar 2, Apr 3, May 4, Jun 5, Jul 4, Aug 4, Sep 3, Oct 1, Nov 1, Dec —.

What is the UV index in Cliffs of Moher in June?

June is the peak UV month in Cliffs of Moher, with a daily-peak UV index of 5 (moderate). Standard sun protection — sunglasses and light SPF — is recommended.

How high can UV get in Cliffs of Moher on the sunniest days?

Most days look like the monthly average, but on the sunniest ~1 in 10 days UV climbs higher than the mean suggests. June is the worst case: typical days average UV 5 (moderate), but the top 10% of days reach UV 6 (high) — and even higher. Months where the sunniest days routinely exceed the typical reading: June, September. Plan sun protection for the worst case, not the average.