Contents
- Weather in April
- Frequently asked questions
- Average temperature in April
- Average pressure in April
- Average wind speed in April
- Average humidity in April
- Average rainfall in April
- Average rainfall days in April
- Average snowfall in April
- Average snowfall days in April
- Average daylight in April
- Average sunshine in April
- Average sunshine days in April
- Average UV index in April
- Average cloud cover in April
- Average visibility in April
April
Weather in April
Temperature
With the onset of April, Harmondsworth's average high-temperature experiences a slight rise, moving from March's cool 10.5°C (50.9°F) to a refreshing 14.3°C (57.7°F). In the month of April, an average of 5.3°C (41.5°F) marks the low-temperature in Harmondsworth.Humidity
The average relative humidity in April is 77%.Rainfall
January, March through May are months with the least rain in Harmondsworth, United Kingdom, when the rain falls for 10.3 days and typically aggregates up to 9mm (0.35") of rain.Snowfall
April through November are months without snowfall.Daylight
The average length of the day in April in Harmondsworth is 13h and 54min.On the first day of April, sunrise is at 6:35 am and sunset at 7:35 pm. On the last day of the month, sunrise is at 5:34 am and sunset at 8:23 pm BST.
Sunshine
The average sunshine in April is 7.6h.UV index
In April, the average daily maximum UV index is 3. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for average individuals.Note: In April, the maximum UV index of 3 transforms into these recommendations:
Take precautions - Protection against skin and eye damage is obliged. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. Take warning! The intensity of the Sun's UV radiation can be nearly amplified twice due to snow reflection.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are April temperatures in Harmondsworth?
What is the average humidity in April in Harmondsworth?
What is the driest month in Harmondsworth?
How much does it rain in Harmondsworth in April?
When it does not snow in Harmondsworth?
Does it snow in Harmondsworth in April?
How many hours of daylight does Harmondsworth have in April?
What time are sunrise and sunset in April in Harmondsworth?
How many hours of sunshine does Harmondsworth have in April?
How high is the UV index in April in Harmondsworth?
Average temperature in April
Harmondsworth, United Kingdom
- Average high temperature in April: 14.3°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 April: 5.3°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 April
Harmondsworth, United Kingdom
- Average pressure in April: 1015.7mbar
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 April
Harmondsworth, United Kingdom
- Average wind speed in April: 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 April
Harmondsworth, United Kingdom
- Average humidity in April: 77%
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 April
Harmondsworth, United Kingdom
- Average rainfall in April: 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 April
Harmondsworth, United Kingdom
- Average rainfall days in April: 10.3 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 April
Harmondsworth, United Kingdom
- Average snowfall in April: 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 April
Harmondsworth, United Kingdom
- Average snowfall days in April: 0.2 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 April /
Average sunshine in April
Harmondsworth, United Kingdom
- Average daylight in April: 13h and 5min
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 April: 7h and 4min
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 April
Harmondsworth, United Kingdom
- Average sunshine days in April: 16.3 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 April
Harmondsworth, United Kingdom
- Average UV index in April: 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 April
Harmondsworth, United Kingdom
- Average cloud cover in April: 49
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 April
Harmondsworth, United Kingdom
- Average visibility in April: 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).
