Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average sea temperature in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
December
Weather in December
Temperature
Porthleven's weather in December indicates an average high-temperature of a still cool 10.7°C (51.3°F), nearly consistent with the 12.3°C (54.1°F) of November. Porthleven, in December, logs an average low-temperature of 9°C (48.2°F), a subtle step down from daytime readings.Humidity
The months with the lowest humidity are February, November and December, with an average relative humidity of 79%.Rainfall
In Porthleven, in December, during 21.7 rainfall days, 69mm (2.72") of precipitation is typically accumulated. Throughout the year, in Porthleven, there are 204.9 rainfall days, and 617mm (24.29") of precipitation is accumulated.Snowfall
In Porthleven, United Kingdom, snow does not fall in March through December.Sea temperature
In Porthleven, in December, the average water temperature is 11.8°C (53.2°F).Note: Swimming at temperatures less than 10°C (50°F) in 11.8°C (53.2°F) is feasible with the right swimsuit; if not, expect cold shock and breathlessness. A quick swim at 13°C (55.4°F) without adequate warmth can be discomforting.
Daylight
With an average of 8h and 12min of daylight, December has the shortest days of the year in Porthleven.On the first day of December, sunrise is at 7:58 am and sunset at 4:21 pm. On the last day of the month, sunrise is at 8:20 am and sunset at 4:28 pm GMT.
Sunshine
December has the least sunshine of the year in Porthleven, with an average of 3.9h of sunshine.UV index
The average daily maximum UV index in December is 3. A UV Index value of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for average individuals.Note: A maximum high UV index of 3 in December translates into the following recommendations:
Ensure safety - Sun damage prevention is strongly urged. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Porthleven in December?
What are the least humid months in Porthleven?
What is the average humidity in December in Porthleven?
How much does it rain in Porthleven in December?
When it does not snow in Porthleven?
Does it snow in Porthleven in December?
What is the water temperature in December in Porthleven?
What is the month with the shortest days in Porthleven?
What is the average length of the day in December in Porthleven?
When is the sunrise / sunset in December in Porthleven?
What is the month with the least sunshine in Porthleven?
How long on average sun shines in December in Porthleven?
What is the UV index intensity in December in Porthleven?
Average temperature in December
Porthleven, United Kingdom
- Average high temperature in December: 10.7°C
The warmest month (with the highest average high temperature) is August (17.4°C).
The month with the lowest average high temperature is February (9.3°C).
- Average low temperature in December: 9°C
The month with the highest average low temperature is August (15.8°C).
The coldest month (with the lowest average low temperature) is February (7.1°C).
Average pressure in December
Porthleven, United Kingdom
- Average pressure in December: 1015.1mbar
The month with the highest atmospheric pressure is September (1017.5mbar).
The month with the lowest atmospheric pressure is November (1010.5mbar).
Average wind speed in December
Porthleven, United Kingdom
- Average wind speed in December: 32.9km/h
The windiest month (with the highest average wind speed) is December (32.9km/h).
The calmest month (with the lowest average wind speed) is July (20.8km/h).
Average humidity in December
Porthleven, United Kingdom
- Average humidity in December: 79%
The months with the highest relative humidity are June and July (84%).
The months with the lowest relative humidity are February, November and December (79%).
Average rainfall in December
Porthleven, United Kingdom
- Average rainfall in December: 69mm
The wettest month (with the highest rainfall) is November (91mm).
The driest month (with the least rainfall) is May (29mm).
Average rainfall days in December
Porthleven, United Kingdom
- Average rainfall days in December: 21.7 days
The month with the highest number of rainy days is December (21.7 days).
The month with the least rainy days is May (13.6 days).
Average snowfall in December
Porthleven, United Kingdom
- Average snowfall in December: 0mm
The month with the highest snowfall is February (3mm).
The months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0mm).
Average snowfall days in December
Porthleven, United Kingdom
- Average snowfall days in December: 0.1 days
The month with the highest number of snowfall days is February (0.8 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October and November (0 days).
Average sea temperature in December
Porthleven, United Kingdom
- Average sea temperature in December: 11.8°C
The best month for swimming (with the highest average sea temperature) is August (17.1°C).
The coldest month (with the lowest average sea temperature) is March (9.7°C).
Average daylight in December /
Average sunshine in December
Porthleven, United Kingdom
- Average daylight in December: 8h and 1min
The month with the longest days is June (Average daylight: 16h and 18min).
The month with the shortest days is December (Average daylight: 8h and 12min).
- Average sunshine in December: 3h and 5min
The months with the most sunshine are April and July (Average sunshine: 8h and 30min).
The month with the least sunshine is December (Average sunshine: 3h and 54min).
Average sunshine days in December
Porthleven, United Kingdom
- Average sunshine days in December: 5.4 days
The month with the most sunshine days is May (14.8 days).
The month with the least sunshine days is November (5.3 days).
Average UV index in December
Porthleven, United Kingdom
- Average UV index in December: 3
The month with the highest UV index is August (UV index 5).
The month with the lowest UV index is January (UV index 2).
Average cloud cover in December
Porthleven, United Kingdom
- Average cloud cover in December: 62
The month with the most cloud cover is December (Cloud cover 62).
The month with the least cloud cover is April (Cloud cover 43).
Average visibility in December
Porthleven, United Kingdom
- Average visibility in December: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
