Best time to visit Killarney
Re-score for me — drag the dial — every chart on the page recolours live for your heat limit 27°C
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.
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.
Tours in Killarney
30 top-rated tours via Viator. Booking links earn this site a commission at no cost to you. Map locations are approximate (centred on Killarney).
- 1
Killarney Jaunting Car Tour- Park to Castle - 2
Killarney National Park Tour - 3
Jaunting Car Tour in Killarney National Park - 4
Private Ring of Kerry luxury tour with accredited guide - 5
Private Tour of Ring of Kerry & Valentia Island - 6
Ring of Kerry and Skellig Ring Private Tour - 7
Ring of Kerry Private Tour from Killarney - 8
Private tour of Dingle and Slea Head with accredited guide - 9
Uncover the Ring of Kerry & Kerry Cliffs -Private Luxury Day Tour - 10
Ring of Kerry Private Day Tour from Killarney - 11
Ring of Kerry Tour Private Chauffeur Driven From Killarney - 12
1 Hour Guided Carriage Tour in Killarney National Park - 13
Full-Day Tour of the Dingle Peninsula, Slea Head, and Inch Beach - 14
Ring Of Kerry Tour - 15
Ring of Kerry & Skellig Ring Private Day Tour - 16
Full-Day Ring of Kerry Tour from Killarney - 17
Best Ring of Kerry Tour ex Killarney inc Killarney National Park - 18
Combination Killarney Jaunting Car Tour and Lakes of Killarney Cruise - 19
Kerry Cliffs via Skellig Ring and Ring of Kerry - 20
Guided Killarney National Park Walking Tour - 21
NO 1 Ring of Kerry Tour inc Killarney Lakes & National Park - 22
The Gap of Dunloe Full-Day Tour from Killarney - 23
Ring of Kerry and Kerry Cliffs Private Tour - 24
Dingle Town & Peninsula Private Chauffeur Driven Day Tour From Killarney Luxury - 25
Explore the Ring of Kerry & Skellig Ring in Style-Private Tour - 26
Killarney National Park Horseback Ride. Co Kerry. Guided. 2 hours. - 27
Killarney National Park Horseback Ride. Co Kerry. Guided. 1 hour. - 28
1 hour Lake Cruise on Killarney's Largest Lake - 29
Private Award Winning Tours with Top Rated Local Driver Guides - 30
Killarney Super Saver: Dingle and Slea Head Day Trip plus Ring of Kerry and Killarney Lakes Day Trip
Last refreshed 2026-10-18.
Similar climatesLimerick93% · Galway90% · Cliffs of Moher89%
Other destinations with the most-alike year-round climate to Killarney (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 Killarney'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 | 4–9 | 6 | 17 | 233 | 13.7 | 85% | 19 | 86 | — | Quiet | 3 |
| Feb | 5–10 | 6 | 21 | 312 | 14.9 | 80% | 24 | 83 | 1 | Quiet | 2 |
| Mar | 5–11 | 8 | 18 | 270 | 15.0 | 76% | 21 | 137 | 2 | Quiet | 3 |
| Apr | 6–13 | 10 | 14 | 190 | 13.6 | 69% | 19 | 176 | 3 | Quiet | 5 |
| May | 8–16 | 14 | 16 | 223 | 13.9 | 69% | 19 | 214 | 4 | Quiet | 5 |
| Jun | 11–18 | 16 | 18 | 235 | 13.1 | 70% | 18 | 186 | 4 | Busy | 5 |
| Jul | 12–19 | 18 | 21 | 308 | 14.7 | 74% | 18 | 178 | 4 | Peak | 4 |
| Aug | 13–19 | 18 | 19 | 282 | 14.8 | 74% | 18 | 191 | 3 | Peak | 4 |
| Sep | 11–18 | 16 | 17 | 226 | 13.3 | 76% | 18 | 154 | 3 | Quiet | 5 |
| Oct | 9–14 | 12 | 22 | 302 | 13.7 | 80% | 20 | 123 | 1 | Quiet | 3 |
| Nov | 7–11 | 9 | 19 | 267 | 14.1 | 85% | 21 | 80 | 1 | Quiet | 3 |
| Dec | 5–9 | 6 | 20 | 284 | 14.2 | 86% | 22 | 72 | — | Quiet | 2 |
UV Index in Killarney by Month
UV index in Killarney peaks at 4 (moderate) in June, dropping to 0 (low) in January.
Best months in detail
June
5/1011–18°C (feels 16°C) · 18 rain days (235h) · 186 sun hours · 70% humidity · Busy crowd · UV 4 (moderate) · sunniest 1 in 10 days reach 6 (high)
September
5/1011–18°C (feels 16°C) · 17 rain days (226h) · 154 sun hours · 76% humidity · Quiet crowd · UV 3 (low) · sunniest 1 in 10 days reach 4 (moderate)
April
5/106–13°C (feels 10°C) · 14 rain days (190h) · 176 sun hours · 69% humidity · Quiet crowd · UV 3 (low) · sunniest 1 in 10 days reach 4 (moderate)
Every month
Show the other 9 months in detail
January
3/104–9°C (feels 6°C) · 17 rain days (233h) · 86 sun hours · 85% humidity · Quiet crowd
February
2/105–10°C (feels 6°C) · 21 rain days (312h) · 83 sun hours · 80% humidity · Quiet crowd · UV 1 (low)
March
3/105–11°C (feels 8°C) · 18 rain days (270h) · 137 sun hours · 76% humidity · Quiet crowd · UV 2 (low)
May
5/108–16°C (feels 14°C) · 16 rain days (223h) · 214 sun hours · 69% humidity · Quiet crowd · UV 4 (moderate) · sunniest 1 in 10 days reach 6 (moderate)
July
4/1012–19°C · 21 rain days (308h) · 178 sun hours · 74% humidity · Peak crowd · UV 4 (moderate) · sunniest 1 in 10 days reach 5 (moderate)
August
4/1013–19°C · 19 rain days (282h) · 191 sun hours · 74% humidity · Peak crowd · UV 3 (moderate)
October
3/109–14°C (feels 12°C) · 22 rain days (302h) · 123 sun hours · 80% humidity · Quiet crowd · UV 1 (low)
November
3/107–11°C (feels 9°C) · 19 rain days (267h) · 80 sun hours · 85% humidity · Quiet crowd · UV 1 (low)
December
2/105–9°C (feels 6°C) · 20 rain days (284h) · 72 sun hours · 86% humidity · Quiet crowd
Frequently asked questions about visiting Killarney
When is the best time to visit Killarney?
June is the highest-scoring month (5/10 on the Holiday Climate Index). Typical conditions: 11–18°C (18 rainy days). The top three months by score are June, September, April.
What is the worst time to visit Killarney?
February is the lowest-scoring month (2/10). Typical conditions: 5–10°C (21 rainy days).
When are crowds lowest in Killarney?
Search-interest seasonality (Google Trends 2021-2025) is lowest in January and peaks in July. 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 Killarney by month?
UV peaks at 4 (moderate) in June and is lowest in January at 0 (low). Monthly peak values: Jan —, Feb 1, Mar 2, Apr 3, May 4, Jun 4, Jul 4, Aug 3, Sep 3, Oct 1, Nov 1, Dec —.
What is the UV index in Killarney in June?
June is the peak UV month in Killarney, with a daily-peak UV index of 4 (moderate). Standard sun protection — sunglasses and light SPF — is recommended.
How high can UV get in Killarney 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 4 (moderate), but the top 10% of days reach UV 6 (high) — and even higher. Months where the sunniest days routinely exceed the typical reading: April, May, June, July, September. Plan sun protection for the worst case, not the average.