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 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 transition into May reveals an average high-temperature of a comfortable 16.8°C (62.2°F), mirroring a close resemblance to April. Harmondsworth's average low-temperature during May nights is observed to be a frosty 7.9°C (46.2°F).Humidity
In May, the average relative humidity in Harmondsworth is 76%.Rainfall
January, March through May are months with the least rain in Harmondsworth, United Kingdom, when the rain falls for 9.8 days and typically aggregates up to 9mm (0.35") of rain.Snowfall
In Harmondsworth, snow does not fall in April through November.Daylight
In Harmondsworth, the average length of the day in May is 15h and 38min.On the first day of May, sunrise is at 5:32 am and sunset at 8:25 pm. On the last day of the month, sunrise is at 4:50 am and sunset at 9:08 pm BST.
Sunshine
The average sunshine in May is 7.5h.UV index
In Harmondsworth, the average daily maximum UV index in May is 4. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: The maximum UV index, 4 during May, leads to the following recommendations:
Undertake precautions - It is suggested to shield oneself from sunburn. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
Frequently asked questions
What are the temperatures in Harmondsworth in May?
What is the average humidity in May in Harmondsworth?
What is the driest month in Harmondsworth?
How much does it rain in Harmondsworth in May?
When it does not snow in Harmondsworth?
What is the average length of the day in May in Harmondsworth?
What time are sunrise and sunset in May in Harmondsworth?
How long on average sun shines in May in Harmondsworth?
How high is the UV index in May in Harmondsworth?
Average temperature in May
Harmondsworth, United Kingdom
- Average high temperature in May: 16.8°C
The warmest month (with the highest average high temperature) is July (22°C).
The month with the lowest average high temperature is January (6.8°C).
- Average low temperature in May: 7.9°C
The month with the highest average low temperature is August (13.7°C).
The coldest month (with the lowest average low temperature) is January (1.9°C).
Average pressure in May
Harmondsworth, United Kingdom
- Average pressure in May: 1016.8mbar
The month with the highest atmospheric pressure is September (1016.9mbar).
The month with the lowest atmospheric pressure is November (1010.5mbar).
Average wind speed in May
Harmondsworth, United Kingdom
- Average wind speed in May: 13.4km/h
The windiest month (with the highest average wind speed) is February (17.5km/h).
The calmest months (with the lowest average wind speed) are July and September (12.7km/h).
Average humidity in May
Harmondsworth, United Kingdom
- Average humidity in May: 76%
The month with the highest relative humidity is December (89%).
The months with the lowest relative humidity are July and August (74%).
Average rainfall in May
Harmondsworth, United Kingdom
- Average rainfall in May: 9mm
The wettest month (with the highest rainfall) is June (21mm).
The driest months (with the least rainfall) are January, March, April and May (9mm).
Average rainfall days in May
Harmondsworth, United Kingdom
- Average rainfall days in May: 9.8 days
The month with the highest number of rainy days is June (12.3 days).
The month with the least rainy days is January (6.8 days).
Average snowfall in May
Harmondsworth, United Kingdom
- Average snowfall in May: 0mm
The months with the highest snowfall are January and February (6mm).
The months with the least snowfall are April, May, June, July, August, September, October and November (0mm).
Average snowfall days in May
Harmondsworth, United Kingdom
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is February (2 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in May /
Average sunshine in May
Harmondsworth, United Kingdom
- Average daylight in May: 15h and 4min
The month with the longest days is June (Average daylight: 16h and 36min).
The month with the shortest days is December (Average daylight: 7h and 54min).
- Average sunshine in May: 7h and 3min
The month with the most sunshine is July (Average sunshine: 7h and 54min).
The month with the least sunshine is February (Average sunshine: 3h and 42min).
Average sunshine days in May
Harmondsworth, United Kingdom
- Average sunshine days in May: 16.7 days
The month with the most sunshine days is October (20.2 days).
The months with the least sunshine days are June and July (14.2 days).
Average UV index in May
Harmondsworth, United Kingdom
- Average UV index in May: 4
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in May
Harmondsworth, United Kingdom
- Average cloud cover in May: 51
The month with the most cloud cover is February (Cloud cover 61).
The month with the least cloud cover is April (Cloud cover 49).
Average visibility in May
Harmondsworth, United Kingdom
- Average visibility in May: 9km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October and December (9km).
The month with the lowest visibility is November (8km).
Harmondsworth, United Kingdom
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