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Monthly climate in Sion Mills, Northern Ireland, United Kingdom

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Sion Mills features a oceanic climate (Cfb).Temperatures typically range between 5 °C (41 °F) and 15 °C (59 °F) through the year, but rarely can drop to -4 °C (24 °F) or can rise to as high as 28 °C (82 °F).The average annual precipitation amounts to about 1147 mm (45.2 inches) and receives 194 rainy days on the 1 mm (0.04 inches) threshold annually.Sion Mills enjoys an average of 2809 hours of sunshine throughout the year, and daylight varies from 7 hours 17 minutes to 17 hours 12 minutes per day.

Monthly average temperatures in Sion Mills, Northern Ireland, United Kingdom §

The warmest months in Sion Mills are June, July and August, with daily mean temperatures ranging from 13 to 15 °C (56 - 59 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 5 to 6 °C (41 - 43 °F) throughout the day. On average each year, Sion Mills experiences 1 days above 25 °C (77.0 °F) and 18 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Sion Mills, 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
(62°F)		 20°C
(69°F)		 24°C
(76°F)		 28°C
(82°F)		 27°C
(81°F)		 23°C
(74°F)		 24°C
(75°F)		 19°C
(66°F)		 15°C
(58°F)		 12°C
(55°F)
Mean maximum 12°C
(53°F)		 12°C
(54°F)		 14°C
(57°F)		 17°C
(63°F)		 21°C
(71°F)		 21°C
(71°F)		 24°C
(75°F)		 22°C
(71°F)		 20°C
(68°F)		 16°C
(62°F)		 14°C
(57°F)		 12°C
(53°F)
Average high 7°C
(45°F)		 8°C
(46°F)		 9°C
(49°F)		 11°C
(53°F)		 14°C
(58°F)		 17°C
(62°F)		 18°C
(65°F)		 17°C
(63°F)		 15°C
(60°F)		 12°C
(54°F)		 9°C
(49°F)		 8°C
(46°F)
Daily mean 5°C
(41°F)		 5°C
(42°F)		 6°C
(43°F)		 8°C
(47°F)		 11°C
(52°F)		 13°C
(56°F)		 15°C
(59°F)		 14°C
(58°F)		 12°C
(55°F)		 10°C
(50°F)		 7°C
(45°F)		 6°C
(43°F)
Average low 3°C
(38°F)		 3°C
(37°F)		 3°C
(38°F)		 5°C
(40°F)		 7°C
(45°F)		 10°C
(50°F)		 12°C
(53°F)		 12°C
(53°F)		 10°C
(50°F)		 7°C
(45°F)		 5°C
(41°F)		 4°C
(39°F)
Mean minimum -2°C
(28°F)		 -2°C
(29°F)		 -2°C
(29°F)		 -1°C
(31°F)		 1°C
(34°F)		 5°C
(41°F)		 8°C
(46°F)		 7°C
(45°F)		 4°C
(40°F)		 2°C
(36°F)		 -0°C
(32°F)		 -1°C
(31°F)
Minimum -4°C
(25°F)		 -4°C
(25°F)		 -4°C
(24°F)		 -2°C
(28°F)		 -2°C
(29°F)		 3°C
(38°F)		 6°C
(43°F)		 5°C
(42°F)		 1°C
(34°F)		 -0°C
(32°F)		 -3°C
(26°F)		 -2°C
(28°F)

Compare climate in Sion Mills with other places

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

Monthly average precipitation in Sion Mills, Northern Ireland, United Kingdom §

Sion Mills usually has the most precipitation in February, August and October, with an average of 18 rainy days and 119 mm (4.7 inches) of precipitation per month.The driest months in Sion Mills are January, April and May. On average, 71 mm (2.8 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Sion Mills, 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) 72 (2.8) 115 (4.5) 100 (3.9) 60 (2.4) 80 (3.2) 101 (4.0) 95 (3.7) 138 (5.4) 86 (3.4) 104 (4.1) 94 (3.7) 102 (4.0)
Average precipitation days (≥ 1 mm) 13 16 17 13 14 17 14 20 17 18 17 18

Monthly sunshine hours in Sion Mills, Northern Ireland, United Kingdom §

The sunniest months in Sion Mills are May, June and July, when the sun shines an average of 12 hours 8 minutes a day.Least sunny months in Sion Mills: January, November and December receive an average of 2 hours 47 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Sion Mills, 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 68 139 187 297 384 362 370 324 270 215 110 77
Mean daily daylight hours 7h 53m 9h 42m 11h 54m 14h 9m 16h 8m 17h 12m 16h 38m 14h 49m 12h 39m 10h 25m 8h 23m 7h 17m

Solar UV radiation in Sion Mills, Northern Ireland, United Kingdom §

Sion Mills 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 Sion Mills UV Index data.

Average daily maximum UV levels by month for Sion Mills, 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 7 8 8 7 5 3 2 1