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Monthly climate in Derry, Northern Ireland, United Kingdom

Last updated: March 2, 2024

Under the Köppen–Geiger climate classification Derry features a oceanic climate (Cfb). Temperatures typically range between 6 °C (42 °F) and 15 °C (59 °F) through the year, but rarely can drop to -4 °C (25 °F) or can rise to as high as 27 °C (81 °F). The average annual precipitation amounts to about 1113 mm (43.8 inches) and receives 197 rainy days on the 1 mm (0.04 inches) threshold annually. Derry enjoys an average of 2941 hours of sunshine throughout the year, and daylight varies from 7 hours 14 minutes to 17 hours 16 minutes per day.

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

The warmest months in Derry 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 6 to 6 °C (42 - 43 °F) throughout the day. On average each year, Derry experiences 1 days above 25 °C (77.0 °F) and 10 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Derry, 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)		 21°C
(69°F)		 25°C
(76°F)		 27°C
(81°F)		 27°C
(81°F)		 23°C
(73°F)		 24°C
(75°F)		 19°C
(66°F)		 15°C
(59°F)		 13°C
(56°F)
Mean maximum 12°C
(54°F)		 12°C
(54°F)		 14°C
(58°F)		 17°C
(63°F)		 21°C
(71°F)		 21°C
(70°F)		 24°C
(76°F)		 21°C
(71°F)		 20°C
(69°F)		 17°C
(62°F)		 14°C
(57°F)		 12°C
(54°F)
Average high 7°C
(46°F)		 8°C
(46°F)		 9°C
(49°F)		 11°C
(53°F)		 14°C
(58°F)		 16°C
(62°F)		 18°C
(64°F)		 17°C
(63°F)		 16°C
(60°F)		 12°C
(55°F)		 10°C
(49°F)		 8°C
(47°F)
Daily mean 6°C
(42°F)		 6°C
(42°F)		 6°C
(44°F)		 8°C
(47°F)		 11°C
(52°F)		 13°C
(56°F)		 15°C
(59°F)		 15°C
(58°F)		 13°C
(55°F)		 10°C
(51°F)		 8°C
(46°F)		 6°C
(43°F)
Average low 4°C
(39°F)		 3°C
(38°F)		 4°C
(39°F)		 5°C
(41°F)		 7°C
(46°F)		 10°C
(51°F)		 12°C
(54°F)		 12°C
(54°F)		 10°C
(50°F)		 8°C
(46°F)		 5°C
(42°F)		 4°C
(40°F)
Mean minimum -1°C
(30°F)		 -1°C
(30°F)		 -1°C
(31°F)		 0°C
(33°F)		 2°C
(37°F)		 6°C
(43°F)		 8°C
(47°F)		 8°C
(47°F)		 5°C
(42°F)		 3°C
(37°F)		 1°C
(34°F)		 -1°C
(31°F)
Minimum -3°C
(26°F)		 -3°C
(27°F)		 -4°C
(25°F)		 -1°C
(31°F)		 -1°C
(31°F)		 4°C
(40°F)		 7°C
(45°F)		 6°C
(44°F)		 2°C
(36°F)		 1°C
(33°F)		 -2°C
(29°F)		 -3°C
(27°F)

Compare climate in Derry with other places

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

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

Derry usually has the most precipitation in February, August and October, with an average of 18 rainy days and 114 mm (4.5 inches) of precipitation per month. The driest months in Derry are January, April and May. On average, 69 mm (2.7 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Derry, 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) 69 (2.7) 106 (4.2) 95 (3.7) 58 (2.3) 81 (3.2) 95 (3.7) 91 (3.6) 134 (5.3) 85 (3.4) 102 (4.0) 94 (3.7) 101 (4.0)
Average precipitation days (≥ 1 mm) 12 16 17 13 15 17 15 20 17 18 18 19

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

The sunniest months in Derry are May, June and July, when the sun shines an average of 12 hours 44 minutes a day. Least sunny months in Derry: January, November and December receive an average of 2 hours 52 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Derry, 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 70 142 201 312 399 379 392 350 277 221 114 79
Mean daily daylight hours 7h 50m 9h 40m 11h 53m 14h 10m 16h 11m 17h 16m 16h 41m 14h 51m 12h 39m 10h 24m 8h 21m 7h 14m

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

Derry 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 Derry UV Index data.

Average daily maximum UV levels by month for Derry, 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

Detailed Monthly Weather Insights for Derry, Northern Ireland, United Kingdom

Discover in-depth weather details for every month in Derry. 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 Derry'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.