Climate and monthly weather forecastLondonderry, United Kingdom
Climate and monthly weather forecast
Weather in January
January, the same as December, in Londonderry, United Kingdom, is a frosty winter month, with an average temperature varying between 8°C (46.4°F) and 2.2°C (36°F). Londonderry experiences the lowest of its temperatures in January and December, when the average high-temperatures rise to 8°C (46.4°F). Weather in January »Weather in February
The last month of the winter, February, is also a frosty month in Londonderry, United Kingdom, with an average temperature fluctuating between 2.1°C (35.8°F) and 8.2°C (46.8°F). As Londonderry welcomes February, the average high-temperature records at a still chilly 8.2°C (46.8°F), marking an insignificant deviation from the prior month. Weather in February »Weather in March
March, the first month of the spring in Londonderry, is a cool month, with an average temperature ranging between min 3.5°C (38.3°F) and max 10.1°C (50.2°F). Londonderry marks the onset of March with an average high-temperature of a fresh 10.1°C (50.2°F), subtly divergent from February's 8.2°C (46.8°F). Weather in March »Weather in April
April, the same as March, is a cool spring month in Londonderry, United Kingdom, with temperature in the range of an average low of 4.8°C (40.6°F) and an average high of 12.1°C (53.8°F). The average high-temperature for April is a still cool 12.1°C (53.8°F), closely aligning with the temperature of the preceding month. Weather in April »Weather in May
May, the last month of the spring in Londonderry, is a refreshing month, with temperature in the range of an average low of 7°C (44.6°F) and an average high of 15°C (59°F). In May, Londonderry notes an average high-temperature of a moderate 15°C (59°F), hardly different from the preceding month. Weather in May »Weather in June
June, the first month of the summer in Londonderry, is a comfortable month, with an average temperature fluctuating between 9.7°C (49.5°F) and 17°C (62.6°F). Upon the onset of June, Londonderry witnesses an average high-temperature of a still refreshing 17°C (62.6°F), showing a close resemblance to the prior month. Weather in June »Weather in July
July, the same as June, is another refreshing summer month in Londonderry, United Kingdom, with temperature in the range of an average low of 11.6°C (52.9°F) and an average high of 18.9°C (66°F). Londonderry's temperatures tend to reach their peak averages in July, with a high of 18.9°C (66°F) and a low of 11.6°C (52.9°F). Weather in July »Weather in August
The last month of the summer, August, is another refreshing month in Londonderry, United Kingdom, with temperature in the range of an average high of 18.5°C (65.3°F) and an average low of 11.4°C (52.5°F). August records an average high-temperature of a still enjoyable 18.5°C (65.3°F), indicating a minor variation from the preceding month. Weather in August »Weather in September
The first month of the autumn, September, is also an enjoyable month in Londonderry, United Kingdom, with an average temperature varying between 16.7°C (62.1°F) and 9.8°C (49.6°F). The advent of September denotes an average high-temperature of a still enjoyable 16.7°C (62.1°F), subtly different from August's 18.5°C (65.3°F). Weather in September »Weather in October
October, like September, is another mild autumn month in Londonderry, United Kingdom, with temperature in the range of an average low of 7.2°C (45°F) and an average high of 13.5°C (56.3°F). October brings a minor shift in the average high-temperature, adjusting from a comfortable 16.7°C (62.1°F) in September to a moderate 13.5°C (56.3°F). Weather in October »Weather in November
November, the last month of the autumn in Londonderry, is also a fresh month, with temperature in the range of an average low of 4.5°C (40.1°F) and an average high of 10.2°C (50.4°F). A mild drop in Londonderry's average high-temperature is observed in November, transitioning from a mild 13.5°C (56.3°F) in October to a cool 10.2°C (50.4°F). Weather in November »Weather in December
December, the first month of the winter in Londonderry, is also a frosty month, with an average temperature ranging between min 2.5°C (36.5°F) and max 8°C (46.4°F). Londonderry sees its lowest temperatures during January and December, with an average high-temperature of 8°C (46.4°F). Weather in December »Updated: Feb 8, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Londonderry experiences its coldest period in January and December, averaging a high-temperature of 8°C (46.4°F).
Throughout the year, there are 170 rainfall days, and 853mm (33.58") of precipitation is accumulated.
January and December, with an average maximum UV index of 0, are months with the lowest UV index in Londonderry.
The month with the coldest seawater is March, with an average sea temperature of 8.7°C (47.7°F).
May is the month with the least rainfall in Londonderry, United Kingdom. Rain falls for 12 days and accumulates 51mm (2.01") of precipitation.
With an average of 6.5h of sunshine, May has the most sunshine of the year in Londonderry, United Kingdom.
The month with the longest days in Londonderry is June, with an average of 17h and 18min of daylight.
June and July, with an average maximum UV index of 6, are months with the highest UV index in Londonderry, United Kingdom.
July is the warmest month in Londonderry, United Kingdom, with an average high-temperature of 18.9°C (66°F) and an average low-temperature of 11.6°C (52.9°F).
The month with the warmest seawater in Londonderry is August, with an average sea temperature of 14.7°C (58.5°F).
The month with the most rainfall in Londonderry is October, when the rain falls for 16 days and typically aggregates up to 89mm (3.5") of precipitation.
On Sunday, 27. October 2024, at 2:00 am, Daylight Saving Time ends in Londonderry, United Kingdom, and the time zone changes from BST to GMT. The next Daylight Saving Time starts on Sunday, 30. March 2025, at 1:00 am, and the time zone reverts from GMT to BST.
December has the shortest days of the year in Londonderry, United Kingdom, with an average of 7h and 18min of daylight.
With an average of 1.2h of sunshine, December has the least sunshine of the year in Londonderry.
Average temperature
Londonderry, United Kingdom
The warmest month (with the highest average high temperature) is July (18.9°C).
The months with the lowest average high temperature are January and December (8°C).
The month with the highest average low temperature is July (11.6°C).
The coldest month (with the lowest average low temperature) is February (2.1°C).
Average rainfall
Londonderry, United Kingdom
- Average rainfall in January:
83.5mm - Average rainfall in February:
62.7mm - Average rainfall in March:
69.8mm - Average rainfall in April:
55.2mm - Average rainfall in May:
51.2mm - Average rainfall in June:
56.1mm
- Average rainfall in July:
66.1mm - Average rainfall in August:
75.3mm - Average rainfall in September:
68.7mm - Average rainfall in October:
89mm - Average rainfall in November:
86.7mm - Average rainfall in December:
88.4mm
The wettest month (with the highest rainfall) is October (89mm).
The driest month (with the least rainfall) is May (51.2mm).
Average rainfall days
Londonderry, United Kingdom
- Average rainfall days in January:
17 days - Average rainfall days in February:
13 days - Average rainfall days in March:
16 days - Average rainfall days in April:
12 days - Average rainfall days in May:
12 days - Average rainfall days in June:
11 days
- Average rainfall days in July:
13 days - Average rainfall days in August:
13 days - Average rainfall days in September:
13 days - Average rainfall days in October:
16 days - Average rainfall days in November:
19 days - Average rainfall days in December:
15 days
The month with the highest number of rainy days is November (19 days).
The month with the least rainy days is June (11 days).
Average sea temperature
Londonderry, United Kingdom
The best month for swimming (with the highest average sea temperature) is August (14.7°C).
The coldest month (with the lowest average sea temperature) is March (8.7°C).
Average daylight / Average sunshine
Londonderry, United Kingdom
- Average daylight in January:
7h and 54min - Average daylight in February:
9h and 42min - Average daylight in March:
11h and 54min - Average daylight in April:
14h and 12min - Average daylight in May:
16h and 12min - Average daylight in June:
17h and 18min
- Average daylight in July:
16h and 42min - Average daylight in August:
14h and 54min - Average daylight in September:
12h and 42min - Average daylight in October:
10h and 30min - Average daylight in November:
8h and 24min - Average daylight in December:
7h and 18min
The month with the longest days is June (Average daylight: 17h and 18min).
The month with the shortest days is December (Average daylight: 7h and 18min).
- Average sunshine in January:
1h and 42min - Average sunshine in February:
2h and 36min - Average sunshine in March:
3h and 18min - Average sunshine in April:
5h and 12min - Average sunshine in May:
6h and 30min - Average sunshine in June:
5h and 24min
- Average sunshine in July:
4h and 30min - Average sunshine in August:
4h and 36min - Average sunshine in September:
4h and 0min - Average sunshine in October:
3h and 18min - Average sunshine in November:
1h and 54min - Average sunshine in December:
1h and 12min
The month with the most sunshine is May (Average sunshine: 6h and 30min).
The month with the least sunshine is December (Average sunshine: 1h and 12min).
Average UV index
Londonderry, United Kingdom
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and December (UV index 0).
