Temperature
Cool by day, cold at night.
Cool days and some sun.

Cool by day, cold at night.
Rain is frequent. About 16 wet days this month.
Cloudier spells limit sunshine.
Humidity is rarely noticeable in the cool air.
In March, afternoons feel about 42° and nights feel near 35°.
Mostly cloudy skies this month.
Calm winds are typical in March.
March late afternoons are around 50°F, easing to about 45°F in early evening.
| Month | High°F | Low°F | Rainin | Wet days | Sunh | Humidity% |
|---|---|---|---|---|---|---|
| Jan | 47 | 37 | 4.1 | 13 | 4.4 | 90 |
| Feb | 50 | 41 | 5.2 | 16 | 5.8 | 88 |
| Mar | 52 | 40 | 4.7 | 16 | 7.7 | 85 |
| Apr | 56 | 43 | 2.9 | 14 | 9.9 | 82 |
| May | 61 | 47 | 3.7 | 14 | 10.8 | 82 |
| Jun | 64 | 51 | 3.2 | 15 | 11.1 | 82 |
| Jul | 67 | 55 | 3.7 | 15 | 10.2 | 85 |
| Aug | 67 | 55 | 3.1 | 13 | 9.4 | 86 |
| Sep | 63 | 51 | 4.9 | 16 | 7.9 | 87 |
| Oct | 58 | 49 | 6.5 | 19 | 6.1 | 89 |
| Nov | 53 | 44 | 4.8 | 18 | 4.8 | 91 |
| Dec | 49 | 41 | 4.8 | 16 | 3.8 | 91 |
Similar climates
Want a side-by-side climate view? Compare Killarney with Amsterdam.
Typical monthly values are based on long-term climate records. Useful for planning, not a forecast. Check the weather before you travel.
Sunshine: source type is not yet identified at metric level.
Local microclimates can vary by beach, neighborhood, trail, or elevation.
Last updated: Jul 31, 2026
Data & methodology