Contents
- Weather in May
- Frequently asked questions
- Average temperature in May
- Average pressure in May
- Average wind speed in May
- Average humidity in May
- Average rainfall in May
- Average rainfall days in May
- Average snowfall in May
- Average snowfall days in May
- Average sea temperature in May
- Average daylight in May
- Average sunshine in May
- Average sunshine days in May
- Average UV index in May
- Average cloud cover in May
- Average visibility in May
Weather in May
Temperature
The initiation of May records an average high-temperature of a fresh 10.8°C (51.4°F), displaying a near consistency with the previous month. Throughout May, Stornoway reports a steady low-temperature average of 8.4°C (47.1°F), slightly lower than its daytime counterpart.Humidity
The average relative humidity in May is 79%.Rainfall
In Stornoway, in May, during 19.7 rainfall days, 55mm (2.17") of precipitation is typically accumulated. Throughout the year, there are 258.9 rainfall days, and 808mm (31.81") of precipitation is accumulated.Snowfall
January through May, November and December are months with snowfall. May is the last month it regularly snows in Stornoway, United Kingdom. During 0.3 snowfall days, in May, Stornoway aggregates 1mm (0.04") of snow. In Stornoway, during the entire year, snow falls for 7.1 days and aggregates up to 74mm (2.91") of snow.Sea temperature
In Stornoway, the average seawater temperature in May is 9.5°C (49.1°F).Note: Beware when you're in 9.5°C (49.1°F) waters; 13°C (55.4°F) is chilling and anything below 10°C (50°F) could cause breathing hindrance and a sudden cold shock, given your physical condition.
Daylight
In Stornoway, the average length of the day in May is 16h and 47min.On the first day of the month, sunrise is at 5:30 am and sunset at 9:15 pm. On the last day of May, in Stornoway, sunrise is at 4:31 am and sunset at 10:15 pm BST.
Sunshine
In May, the average sunshine is 7.3h.UV index
The months with the highest UV index in Stornoway are May through July and September, with an average maximum UV index of 4. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for the ordinary person.Note: The UV index of 4 in May translates into these instructions:
Act with care - The suggestion to avoid sunburn is emphasized. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes. Be attentive! The reflective property of snow can nearly double the Sun's UV radiation.
Frequently asked questions
What are the temperatures in Stornoway in May?
What is the average humidity in May in Stornoway?
How much does it rain in Stornoway in May?
What is the last month it snows in Stornoway?
What is the water temperature in May in Stornoway?
How many hours of daylight does Stornoway have in May?
What time are sunrise and sunset in May in Stornoway?
How long on average sun shines in May in Stornoway?
What is the month with the highest UV index in Stornoway?
How high is the UV index in May in Stornoway?
Average temperature in May
Stornoway, United Kingdom
- Average high temperature in May: 10.8°C
The warmest month (with the highest average high temperature) is August (14.8°C).
The month with the lowest average high temperature is February (7.4°C).
- Average low temperature in May: 8.4°C
The month with the highest average low temperature is August (12.6°C).
The coldest month (with the lowest average low temperature) is February (5.6°C).
Average pressure in May
Stornoway, United Kingdom
- Average pressure in May: 1014.1mbar
The month with the highest atmospheric pressure is June (1014.2mbar).
The month with the lowest atmospheric pressure is December (1003.9mbar).
Average wind speed in May
Stornoway, United Kingdom
- Average wind speed in May: 23.6km/h
The windiest month (with the highest average wind speed) is January (35.6km/h).
The calmest month (with the lowest average wind speed) is July (20.5km/h).
Average humidity in May
Stornoway, United Kingdom
- Average humidity in May: 79%
The month with the highest relative humidity is July (84%).
The months with the lowest relative humidity are January, November and December (76%).
Average rainfall in May
Stornoway, United Kingdom
- Average rainfall in May: 55mm
The wettest month (with the highest rainfall) is December (92mm).
The driest months (with the least rainfall) are April and June (43mm).
Average rainfall days in May
Stornoway, United Kingdom
- Average rainfall days in May: 19.7 days
The month with the highest number of rainy days is December (25 days).
The month with the least rainy days is June (16.6 days).
Average snowfall in May
Stornoway, United Kingdom
- Average snowfall in May: 1mm
The month with the highest snowfall is February (30mm).
The months with the least snowfall are June, July, August, September and October (0mm).
Average snowfall days in May
Stornoway, United Kingdom
- Average snowfall days in May: 0.3 days
The month with the highest number of snowfall days is February (1.9 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average sea temperature in May
Stornoway, United Kingdom
- Average sea temperature in May: 9.5°C
The best month for swimming (with the highest average sea temperature) is August (13.3°C).
The coldest month (with the lowest average sea temperature) is March (7.6°C).
Average daylight in May /
Average sunshine in May
Stornoway, United Kingdom
- Average daylight in May: 16h and 5min
The month with the longest days is June (Average daylight: 18h and 6min).
The month with the shortest days is December (Average daylight: 6h and 30min).
- Average sunshine in May: 7h and 2min
The month with the most sunshine is June (Average sunshine: 7h and 54min).
The month with the least sunshine is December (Average sunshine: 2h and 42min).
Average sunshine days in May
Stornoway, United Kingdom
- Average sunshine days in May: 8.5 days
The month with the most sunshine days is June (10.8 days).
The month with the least sunshine days is December (3.2 days).
Average UV index in May
Stornoway, United Kingdom
- Average UV index in May: 4
The months with the highest UV index are May, June, July and September (UV index 4).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in May
Stornoway, United Kingdom
- Average cloud cover in May: 57
The month with the most cloud cover is January (Cloud cover 68).
The months with the least cloud cover are April and May (Cloud cover 57).
Average visibility in May
Stornoway, United Kingdom
- Average visibility in May: 9km
The months with the highest visibility are April and June (10km).
The months with the lowest visibility are January, February, March, May, July, August, September, October, November and December (9km).
Stornoway, United Kingdom
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