Weather in May
Temperature
In May, Londonderry notes an average high-temperature of a moderate 15°C (59°F), hardly different from the preceding month. Throughout May, Londonderry witnesses a nighttime temperature average of 7°C (44.6°F).Rainfall
The month with the least rainfall is May, when the rain falls for 12 days and typically collects 51mm (2.01") of precipitation.Sea temperature
In Londonderry, the average seawater temperature in May is 10.7°C (51.3°F).Note: Swimming in 10.7°C (51.3°F) at temperatures under 10°C (50°F) requires thermal swimsuits; otherwise, one can face cold shock and breathing difficulty. Even brief immersion at 13°C (55.4°F) feels frosty.
Daylight
The average length of the day in May is 16h and 10min.On the first day of the month, sunrise is at 5:47 am and sunset at 9:05 pm. On the last day of May, sunrise is at 4:57 am and sunset at 9:56 pm BST.
Sunshine
With an average of 6.5h of sunshine, May has the most sunshine of the year.UV index
In May, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for ordinary individuals.Note: A maximum high daily UV index of 5 during May translates into the following directions:
Act with care - Obligation to protect against skin and eye damage is highlighted. To avoid the Sun's strongest rays, limit exposure around the mid-day period. Experience reduced UV exposure by about half when donning a wide-brim hat.
Frequently asked questions
What is the usual temperature for Londonderry in May?
What is the driest month in Londonderry?
How much does it rain in Londonderry in May?
How cold is the water in May in Londonderry?
What is the average length of the day in May in Londonderry?
When is the sunrise / sunset in May in Londonderry?
What month has the most sunshine in Londonderry?
How long on average sun shines in May in Londonderry?
What is the UV index intensity in May in Londonderry?
Average temperature in May
Londonderry, United Kingdom
- Average high temperature in May: 15°C
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).
- Average low temperature in May: 7°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 in May
Londonderry, United Kingdom
- Average rainfall in May: 51.2mm
The wettest month (with the highest rainfall) is October (89mm).
The driest month (with the least rainfall) is May (51.2mm).
Average rainfall days in May
Londonderry, United Kingdom
- Average rainfall days in May: 12 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 in May
Londonderry, United Kingdom
- Average sea temperature in May: 10.7°C
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 in May /
Average sunshine in May
Londonderry, United Kingdom
- Average daylight in May: 16h and 1min
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 May: 6h and 3min
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 in May
Londonderry, United Kingdom
- Average UV index in May: 5
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).
Londonderry, United Kingdom
Weather forecast for your location
2. Allow the app to use your location
