Contents
- Weather in October
- Frequently asked questions
- Average temperature in October
- Average pressure in October
- Average wind speed in October
- Average humidity in October
- Average rainfall in October
- Average rainfall days in October
- Average snowfall in October
- Average snowfall days in October
- Average daylight in October
- Average sunshine in October
- Average sunshine days in October
- Average UV index in October
- Average cloud cover in October
- Average visibility in October
Weather in October
Temperature
October is marked by a subtle drop in average high-temperatures, transitioning from an enjoyable 18.8°C (65.8°F) in September to a moderate 15.1°C (59.2°F). An average temperature of 8.9°C (48°F) is recorded in Harmondsworth during the nights in October.Humidity
In Harmondsworth, the average relative humidity in October is 83%.Rainfall
In Harmondsworth, in October, during 7.3 rainfall days, 13mm (0.51") of precipitation is typically accumulated. Throughout the year, in Harmondsworth, there are 109 rainfall days, and 156mm (6.14") of precipitation is accumulated.Snowfall
April through November are months without snowfall.Daylight
In October, the average length of the day is 10h and 40min.On the first day of the month, sunrise is at 7:03 am and sunset at 6:39 pm BST. On the last day of October, in Harmondsworth, sunrise is at 6:54 am and sunset at 4:36 pm GMT.
Note: On Sunday, 27. October 2024, at 2:00 am, Daylight Saving Time ends, and the time zone changes from BST to GMT. Daylight Saving Time starts again on Sunday, 30. March 2025, at 1:00 am; consequently, the time zone reverts from GMT to BST.
Sunshine
In October, the average sunshine is 4.5h.UV index
In Harmondsworth, United Kingdom, the average daily maximum UV index in October is 3. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for average individuals.Note: An average UV index of 3 in October transforms into this advice:
Guard yourself - An obligation to protect skin and eyes from harm exists. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
Frequently asked questions
What is the average October temperature in Harmondsworth?
What is the average humidity in October in Harmondsworth?
How much does it rain in Harmondsworth in October?
When it does not snow in Harmondsworth?
How many hours of daylight does Harmondsworth have in October?
What time are sunrise and sunset in October in Harmondsworth?
When does Daylight Saving Time (DST) end in October in Harmondsworth?
How many hours of sunshine does Harmondsworth have in October?
What is the UV index reading in October in Harmondsworth?
Average temperature in October
Harmondsworth, United Kingdom
- Average high temperature in October: 15.1°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 October: 8.9°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 October
Harmondsworth, United Kingdom
- Average pressure in October: 1015.1mbar
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 October
Harmondsworth, United Kingdom
- Average wind speed in October: 14.5km/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 October
Harmondsworth, United Kingdom
- Average humidity in October: 83%
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 October
Harmondsworth, United Kingdom
- Average rainfall in October: 13mm
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 October
Harmondsworth, United Kingdom
- Average rainfall days in October: 7.3 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 October
Harmondsworth, United Kingdom
- Average snowfall in October: 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 October
Harmondsworth, United Kingdom
- Average snowfall days in October: 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 October /
Average sunshine in October
Harmondsworth, United Kingdom
- Average daylight in October: 10h 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 October: 4h 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 October
Harmondsworth, United Kingdom
- Average sunshine days in October: 20.2 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 October
Harmondsworth, United Kingdom
- Average UV index in October: 3
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 October
Harmondsworth, United Kingdom
- Average cloud cover in October: 55
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 October
Harmondsworth, United Kingdom
- Average visibility in October: 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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