Last updated: July 31, 2025
Under the Köppen–Geiger climate classification New Ross features a oceanic climate (Cfb). Temperatures typically range between 6 °C (42 °F) and 16 °C (61 °F) through the year, but rarely can drop to -7 °C (20 °F) or can rise to as high as 28 °C (82 °F). The average annual precipitation amounts to about 926 mm (36.5 inches) and receives 149 rainy days on the 1 mm (0.04 inches) threshold annually. New Ross enjoys an average of 3122 hours of sunshine throughout the year, and daylight varies from 7 hours 42 minutes to 16 hours 44 minutes per day.
The warmest months in New Ross are June, July and August, with daily mean temperatures ranging from 14 to 16 °C (58 - 61 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 6 to 7 °C (42 - 44 °F) throughout the day. On average each year, New Ross experiences 2 days above 25 °C (77.0 °F) and 23 days below 0 °C (32.0 °F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Maximum | 13°C (56°F) | 14°C (58°F) | 17°C (62°F) | 20°C (68°F) | 23°C (73°F) | 28°C (82°F) | 27°C (81°F) | 24°C (76°F) | 25°C (77°F) | 18°C (65°F) | 15°C (59°F) | 14°C (57°F) |
| Mean maximum | 12°C (54°F) | 13°C (55°F) | 15°C (59°F) | 17°C (63°F) | 20°C (69°F) | 23°C (73°F) | 24°C (76°F) | 23°C (73°F) | 21°C (71°F) | 17°C (63°F) | 14°C (58°F) | 13°C (55°F) |
| Average high | 8°C (47°F) | 9°C (48°F) | 10°C (50°F) | 12°C (54°F) | 15°C (59°F) | 18°C (64°F) | 20°C (68°F) | 19°C (66°F) | 17°C (63°F) | 13°C (56°F) | 10°C (51°F) | 9°C (48°F) |
| Daily mean | 6°C (42°F) | 6°C (44°F) | 7°C (44°F) | 9°C (48°F) | 11°C (53°F) | 14°C (58°F) | 16°C (61°F) | 15°C (60°F) | 13°C (56°F) | 11°C (51°F) | 8°C (46°F) | 7°C (44°F) |
| Average low | 3°C (38°F) | 4°C (39°F) | 3°C (38°F) | 5°C (41°F) | 7°C (45°F) | 10°C (51°F) | 12°C (55°F) | 12°C (54°F) | 10°C (50°F) | 8°C (46°F) | 5°C (41°F) | 4°C (40°F) |
| Mean minimum | -3°C (27°F) | -2°C (28°F) | -2°C (29°F) | -2°C (29°F) | 1°C (34°F) | 6°C (43°F) | 8°C (46°F) | 7°C (45°F) | 3°C (38°F) | 1°C (34°F) | -1°C (30°F) | -2°C (29°F) |
| Minimum | -5°C (24°F) | -4°C (25°F) | -7°C (20°F) | -3°C (27°F) | -2°C (29°F) | 5°C (41°F) | 6°C (42°F) | 6°C (42°F) | 0°C (33°F) | -2°C (28°F) | -3°C (27°F) | -5°C (24°F) |
Compare temperature, precipitation, sunshine, UV index in New Ross, Ireland with other places around the world.
New Ross usually has the most precipitation in August, November and December, with an average of 13 rainy days and 99 mm (3.9 inches) of precipitation per month. The driest months in New Ross are January, July and September. On average, 58 mm (2.3 inches) of precipitation falls during these months.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Average precipitation mm (inches) | 48 (1.9) | 92 (3.6) | 79 (3.1) | 65 (2.6) | 65 (2.5) | 67 (2.7) | 62 (2.4) | 96 (3.8) | 64 (2.5) | 89 (3.5) | 97 (3.8) | 103 (4.0) |
| Average precipitation days (≥ 1 mm) | 10 | 15 | 15 | 11 | 10 | 12 | 11 | 14 | 11 | 13 | 14 | 13 |
The sunniest months in New Ross are May, June and July, when the sun shines an average of 13 hours 6 minutes a day. Least sunny months in New Ross: January, November and December receive an average of 3 hours 40 minutes of sunshine daily.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mean monthly sunshine hours | 92 | 149 | 206 | 310 | 400 | 397 | 408 | 358 | 307 | 245 | 135 | 109 |
| Mean daily daylight hours | 8h 14m | 9h 53m | 11h 54m | 13h 58m | 15h 47m | 16h 44m | 16h 14m | 14h 36m | 12h 36m | 10h 33m | 8h 42m | 7h 42m |
New Ross experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 7 - 8, which corresponds to the High / Very High category of sun exposure. January, February and December are in the Low exposure category. In these months, the maximum values of the UV index do not exceed 2. For more detailed information, check out our hourly New Ross UV Index data.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV Index (month maximum) | 1 | 2 | 4 | 5 | 7 | 8 | 8 | 7 | 5 | 4 | 2 | 1 |