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Monthly climate in Randalstown, Northern Ireland, United Kingdom

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Randalstown 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.Randalstown 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.

Monthly average temperatures in Randalstown, Northern Ireland, United Kingdom §

The warmest months in Randalstown 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, Randalstown experiences 1 days above 25 °C (77.0 °F) and 12 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Randalstown, Northern Ireland, United Kingdom.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to June 2022.
  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 climate in Randalstown with other places

Compare temperature, precipitation, sunshine, UV index in Randalstown, Northern Ireland, United Kingdom with other places around the world.

Monthly average precipitation in Randalstown, Northern Ireland, United Kingdom §

Randalstown 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 Randalstown are January, April and May. On average, 56 mm (2.2 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Randalstown, Northern Ireland, United Kingdom.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to January 2022.
  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

Monthly sunshine hours in Randalstown, Northern Ireland, United Kingdom §

The sunniest months in Randalstown are May, June and July, when the sun shines an average of 12 hours 57 minutes a day.Least sunny months in Randalstown: January, November and December receive an average of 2 hours 58 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Randalstown, Northern Ireland, United Kingdom.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2017 to January 2022.
  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

Solar UV radiation in Randalstown, Northern Ireland, United Kingdom §

Randalstown 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 Randalstown UV Index data.

Average daily maximum UV levels by month for Randalstown, Northern Ireland, United Kingdom.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2022 to January 2023.
  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