Last updated: March 2, 2024
Under the Köppen–Geiger climate classification Ballymena features a oceanic climate (Cfb). Temperatures typically range between 5 °C (42 °F) and 15 °C (60 °F) through the year, but rarely can drop to -4 °C (25 °F) or can rise to as high as 27 °C (80 °F). The average annual precipitation amounts to about 943 mm (37.1 inches) and receives 176 rainy days on the 1 mm (0.04 inches) threshold annually. Ballymena enjoys an average of 2999 hours of sunshine throughout the year, and daylight varies from 7 hours 18 minutes to 17 hours 11 minutes per day.
The warmest months in Ballymena are June, July and August, with daily mean temperatures ranging from 14 to 15 °C (57 - 60 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 5 to 6 °C (42 - 43 °F) throughout the day. On average each year, Ballymena experiences 1 days above 25 °C (77.0 °F) and 12 days below 0 °C (32.0 °F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Maximum | 14°C (57°F) |
14°C (58°F) |
17°C (63°F) |
20°C (67°F) |
23°C (74°F) |
27°C (80°F) |
27°C (80°F) |
23°C (73°F) |
22°C (72°F) |
18°C (65°F) |
15°C (59°F) |
13°C (56°F) |
| Mean maximum | 12°C (54°F) |
13°C (55°F) |
14°C (58°F) |
17°C (62°F) |
20°C (69°F) |
22°C (71°F) |
24°C (76°F) |
22°C (71°F) |
20°C (69°F) |
17°C (63°F) |
14°C (58°F) |
12°C (55°F) |
| Average high | 7°C (46°F) |
8°C (47°F) |
9°C (49°F) |
11°C (53°F) |
15°C (59°F) |
17°C (63°F) |
19°C (66°F) |
18°C (64°F) |
16°C (61°F) |
13°C (55°F) |
10°C (50°F) |
8°C (47°F) |
| Daily mean | 5°C (42°F) |
6°C (42°F) |
6°C (44°F) |
8°C (47°F) |
11°C (52°F) |
14°C (57°F) |
15°C (60°F) |
15°C (59°F) |
13°C (56°F) |
10°C (51°F) |
8°C (46°F) |
6°C (43°F) |
| Average low | 3°C (38°F) |
3°C (38°F) |
4°C (39°F) |
5°C (42°F) |
7°C (46°F) |
11°C (51°F) |
12°C (54°F) |
12°C (54°F) |
10°C (51°F) |
8°C (47°F) |
6°C (42°F) |
4°C (40°F) |
| Mean minimum | -2°C (28°F) |
-1°C (30°F) |
-1°C (31°F) |
0°C (32°F) |
2°C (36°F) |
6°C (44°F) |
8°C (47°F) |
7°C (46°F) |
5°C (42°F) |
3°C (37°F) |
0°C (33°F) |
-1°C (31°F) |
| Minimum | -4°C (25°F) |
-3°C (27°F) |
-3°C (26°F) |
-1°C (30°F) |
-0°C (32°F) |
6°C (42°F) |
7°C (45°F) |
6°C (43°F) |
2°C (35°F) |
0°C (33°F) |
-1°C (30°F) |
-4°C (25°F) |
Compare temperature, precipitation, sunshine, UV index in Ballymena, Northern Ireland, United Kingdom with other places around the world.
Ballymena usually has the most precipitation in February, July and August, with an average of 16 rainy days and 98 mm (3.9 inches) of precipitation per month. The driest months in Ballymena are January, April and May. On average, 56 mm (2.2 inches) of precipitation falls during these months.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Average precipitation mm (inches) | 56 (2.2) | 89 (3.5) | 78 (3.1) | 45 (1.8) | 66 (2.6) | 82 (3.2) | 86 (3.4) | 118 (4.7) | 70 (2.8) | 85 (3.3) | 85 (3.3) | 82 (3.2) |
| Average precipitation days (≥ 1 mm) | 11 | 14 | 16 | 11 | 14 | 16 | 14 | 20 | 15 | 15 | 15 | 15 |
The sunniest months in Ballymena are May, June and July, when the sun shines an average of 12 hours 57 minutes a day. Least sunny months in Ballymena: January, November and December receive an average of 2 hours 58 minutes of sunshine daily.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mean monthly sunshine hours | 76 | 147 | 206 | 319 | 402 | 390 | 398 | 349 | 287 | 224 | 114 | 82 |
| Mean daily daylight hours | 7h 53m | 9h 42m | 11h 54m | 14h 8m | 16h 7m | 17h 11m | 16h 37m | 14h 49m | 12h 38m | 10h 25m | 8h 24m | 7h 18m |
Ballymena 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 Ballymena UV Index data.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV Index (month maximum) | 1 | 2 | 4 | 5 | 6 | 8 | 8 | 7 | 5 | 3 | 2 | 1 |
Discover in-depth weather details for every month in Ballymena. Click through the links below for comprehensive overviews of temperature trends, precipitation levels, sunshine hours, and solar UV radiation specifics. Whether planning a visit or simply curious about Ballymena's climate nuances, these monthly breakdowns provide the information you need for an informed understanding of what to expect throughout the year.
Each link leads to a detailed account of the typical weather conditions for that month, providing both locals and tourists with vital information to plan their daily activities, wardrobe, and travel itineraries accordingly.