Weather in April
Temperature
At the start of April, Portsmouth's average high-temperature reaches a refreshing 13.2°C (55.8°F), subtly different from the preceding month. During April, the nighttime temperature in Portsmouth averages of 6.1°C (43°F).Rainfall
In April, in Portsmouth, the rain falls for 7.6 days. Throughout April, 42mm (1.65") of precipitation is accumulated. In Portsmouth, during the entire year, the rain falls for 103.4 days and collects up to 699mm (27.52") of precipitation.Sea temperature
In April, the average sea temperature in Portsmouth is 9.8°C (49.6°F).Note: Immersing oneself in 9.8°C (49.6°F) at sub-10°C (14°F) temperatures is a recipe for harsh cold shock and quickened breathing unless adequately equipped.
Daylight
The average length of the day in April is 13h and 51min.On the first day of April in Portsmouth, United Kingdom, sunrise is at 6:38 am and sunset at 7:37 pm. On the last day of the month, sunrise is at 5:38 am and sunset at 8:24 pm BST.
Sunshine
In April, the average sunshine in Portsmouth is 6.7h.UV index
In Portsmouth, the average daily maximum UV index in April is 4. 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 UV index of 4 transforms into the following advice:
Act with care - The suggestion to avoid sunburn is emphasized. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.
Frequently asked questions
What is the usual temperature for Portsmouth in April?
How many days does it rain in April in Portsmouth?
What is the sea water temperature in April in Portsmouth?
What is the average length of the day in April in Portsmouth?
When are sunrise and sunset in April in Portsmouth?
How long on average sun shines in April in Portsmouth?
What is the UV index reading in April in Portsmouth?
Average temperature in April
Portsmouth, United Kingdom
- Average high temperature in April: 13.2°C
The warmest months (with the highest average high temperature) are July and August (21.4°C).
The months with the lowest average high temperature are January and February (8.2°C).
- Average low temperature in April: 6.1°C
The month with the highest average low temperature is August (14.3°C).
The coldest month (with the lowest average low temperature) is February (2.8°C).
Average rainfall in April
Portsmouth, United Kingdom
- Average rainfall in April: 42.4mm
The wettest month (with the highest rainfall) is October (86.2mm).
The driest month (with the least rainfall) is June (42mm).
Average rainfall days in April
Portsmouth, United Kingdom
- Average rainfall days in April: 7.6 days
The months with the highest number of rainy days are January and December (11.2 days).
The month with the least rainy days is July (5.4 days).
Average sea temperature in April
Portsmouth, United Kingdom
- Average sea temperature in April: 9.8°C
The best month for swimming (with the highest average sea temperature) is September (17.3°C).
The coldest month (with the lowest average sea temperature) is March (8.6°C).
Average daylight in April /
Average sunshine in April
Portsmouth, United Kingdom
- Average daylight in April: 13h and 5min
The month with the longest days is June (Average daylight: 16h and 24min).
The month with the shortest days is December (Average daylight: 8h and 0min).
- Average sunshine in April: 6h and 4min
The month with the most sunshine is July (Average sunshine: 8h and 24min).
The month with the least sunshine is December (Average sunshine: 2h and 0min).
Average UV index in April
Portsmouth, United Kingdom
- Average UV index in April: 4
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 1).
Portsmouth, United Kingdom
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