Contents
- Weather in August
- Frequently asked questions
- Average temperature in August
- Average pressure in August
- Average wind speed in August
- Average humidity in August
- Average rainfall in August
- Average rainfall days in August
- Average snowfall in August
- Average snowfall days in August
- Average daylight in August
- Average sunshine in August
- Average sunshine days in August
- Average UV index in August
- Average cloud cover in August
- Average visibility in August
Weather in August
Temperature
As August takes hold, the average high-temperature is a still agreeable 21.6°C (70.9°F), nearly mirroring that of the previous month. Nightly temperatures drop to an average low of 13.7°C (56.7°F) in August.Humidity
July and August, with an average relative humidity of 74%, are the least humid months.Rainfall
In Harmondsworth, in August, it is raining for 10.9 days, with typically 18mm (0.71") of accumulated precipitation. Throughout the year, there are 109 rainfall days, and 156mm (6.14") of precipitation is accumulated.Snowfall
April through November are months without snowfall.Daylight
In Harmondsworth, the average length of the day in August is 14h and 33min.On the first day of August, sunrise is at 5:26 am and sunset at 8:49 pm. On the last day of the month, sunrise is at 6:13 am and sunset at 7:50 pm BST.
Sunshine
In August, the average sunshine in Harmondsworth is 7.8h.UV index
The average daily maximum UV index in August is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for the average person.Note: In August, the maximum UV index of 4 translates into these guidelines:
Be cautious. Those with fair skin can be subjected to burns in fewer than 30 minutes. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.
Frequently asked questions
What is the average August temperature in Harmondsworth?
What is the least humid month in Harmondsworth?
What is the average humidity in August in Harmondsworth?
How many days does it rain in August in Harmondsworth?
When it does not snow in Harmondsworth?
How many hours of daylight does Harmondsworth have in August?
What time are sunrise and sunset in August in Harmondsworth?
How many hours of sunshine does Harmondsworth have in August?
How high is the UV index in August in Harmondsworth?
Average temperature in August
Harmondsworth, United Kingdom
- Average high temperature in August: 21.6°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 August: 13.7°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 August
Harmondsworth, United Kingdom
- Average pressure in August: 1014.9mbar
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 August
Harmondsworth, United Kingdom
- Average wind speed in August: 12.8km/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 August
Harmondsworth, United Kingdom
- Average humidity in August: 74%
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 August
Harmondsworth, United Kingdom
- Average rainfall in August: 18mm
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 August
Harmondsworth, United Kingdom
- Average rainfall days in August: 10.9 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 August
Harmondsworth, United Kingdom
- Average snowfall in August: 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 August
Harmondsworth, United Kingdom
- Average snowfall days in August: 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 August /
Average sunshine in August
Harmondsworth, United Kingdom
- Average daylight in August: 14h 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 August: 7h and 5min
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 August
Harmondsworth, United Kingdom
- Average sunshine days in August: 14.8 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 August
Harmondsworth, United Kingdom
- Average UV index in August: 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 August
Harmondsworth, United Kingdom
- Average cloud cover in August: 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 August
Harmondsworth, United Kingdom
- Average visibility in August: 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
Weather forecast for your location
2. Allow the app to use your location
