Portsmouth
United Kingdom
Long-term weather forecast
Long-term weather forecast

October weather forecast and climate
Portsmouth, United Kingdom

October, like September, is another mild autumn month in Portsmouth, United Kingdom, with temperature in the range of an average high of 15.5°C (59.9°F) and an average low of 9.6°C (49.3°F).

Temperature

In Portsmouth, the average high-temperature in October marginally drops, from an enjoyable 19°C (66.2°F) in September, to a moderate 15.5°C (59.9°F). In Portsmouth, United Kingdom, the average low-temperature is 9.6°C (49.3°F).

Rainfall

The month with the most rainfall is October when the rain falls for 10.9 days and typically aggregates up to 86.2mm (3.4") of precipitation.

Sea temperature

In October, the average sea temperature in Portsmouth is 16.3°C (61.3°F).
Note: For swimming, a surface water temperature of 16.3°C (61.3°F) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 21°C (69.8°F).

Daylight

In October, the average length of the day in Portsmouth, United Kingdom, is 10.7h.

Sunshine

In October, the average sunshine in Portsmouth, United Kingdom, is 3.9h.

UV index

In October, the average daily maximum UV index is 2. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from the exposure to the Sun's UV radiation for the average person.
Note: The daily maximum UV index of 2 interpret into the following advice:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.

What is the temperature in October in Portsmouth?

In Portsmouth, in October, the average high-temperature is 15.5°C (59.9°F), and the average low-temperature is 9.6°C (49.3°F).

How many days does it rain in October in Portsmouth?

In October, in Portsmouth, the rain falls for 10.9 days. Throughout October, 86.2mm (3.4") of precipitation is accumulated.

What is the wettest month in Portsmouth?

October is the month with the most rainfall. Rain falls for 10.9 days and accumulates 86.2mm (3.4") of precipitation.

How cold is the water in October in Portsmouth?

In October, the average sea temperature in Portsmouth, United Kingdom, is 16.3°C (61.3°F). For most, swimming in 16.3°C (61.3°F) is not an enjoyable activity. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 21°C (69.8°F) to 15°C (59°F).

What is the average length of the day in October in Portsmouth?

The average length of the day in October in Portsmouth, United Kingdom, is 10.7h.

How long on average sun shines in October in Portsmouth?

The average sunshine in October in Portsmouth, United Kingdom, is 3.9h.

How high is the UV index in October in Portsmouth?

In October, the average daily maximum UV index in Portsmouth is 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from the exposure to the Sun's UV radiation.
Average temperature in October - Portsmouth, United Kingdom
  • Average high temperature in October: 15.5°C

Warmest months (with the highest average high temperature) are July and August (21.4°C).
Months with the lowest average high temperature are January and February (8.2°C).

  • Average low temperature in October: 9.6°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 October - Portsmouth, United Kingdom
  • Average rainfall in October: 86.2mm

The wettest month (with the highest rainfall) is October (86.2mm).
The driest month (with the lowest rainfall) is June (42mm).

Average rainfall days in October - Portsmouth, United Kingdom
  • Average rainfall days in October: 10.9 days

Months with the highest number of rainy days are January and December (11.2 days).
The month with the lowest number of rainy days is July (5.4 days).

Average sea temperature in October - Portsmouth, United Kingdom
  • Average sea temperature in October: 16.3°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 October / Average sunshine in October - Portsmouth, United Kingdom
  • Average daylight in October: 10.7h

The month with the longest days is June (Average daylight: 16.4h).
The month with shortest days is December (Average daylight: 8h).

  • Average sunshine in October: 3.9h

The month with most sunshine is July (Average sunshine: 8.4h).
The month with least sunshine is December (Average sunshine: 2h).

Average UV index in October - Portsmouth, United Kingdom
  • Average UV index in October: 2

Months with the highest UV index are May, June, July and August (UV index 6).
Months with the lowest UV index are January, February, November and December (UV index 1).