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
The onset of December brings with it an average high-temperature of a cool 11.4°C (52.5°F), showing a negligible variation from the month before. Irun maintains a consistent average nighttime low-temperature of 7.5°C (45.5°F) throughout December.Humidity
The average relative humidity in December is 76%.Rainfall
In Irun, during December, the rain falls for 16 days and regularly aggregates up to 68mm (2.68") of precipitation. In Irun, during the entire year, the rain falls for 207.1 days and collects up to 868mm (34.17") of precipitation.Snowfall
Months with snowfall in Irun, Spain, are January through March and December. December is the first month it typically snows in Irun. Throughout December, in the average 0.8 snowfall days, it receives 2mm (0.08") of snow. In Irun, Spain, during the entire year, snow falls for 3.5 days and aggregates up to 17mm (0.67") of snow.Sea temperature
In Irun, the average seawater temperature in December is 14.3°C (57.7°F).Note: You can swim in 14.3°C (57.7°F) below 10°C (50°F) with proper thermal wear; failing that, the cold shock and respiratory challenges are nearly certain. A short span at 13°C (55.4°F) without it is tough.
Daylight
With an average of 9h and 0min of daylight, December has the shortest days of the year in Irun.On the first day of the month, sunrise is at 08:20 and sunset at 17:32. On the last day of December, sunrise is at 08:39 and sunset at 17:41 CET.
Sunshine
The average sunshine in December in Irun is 5.3h.UV index
The months with the lowest UV index are January through April, November and December, with an average maximum UV index of 3. A UV Index estimate of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for average individuals.Note: In December, the average maximum UV index of 3 translates into the following recommendations:
Undertake precautions - Guarding against sun damage is counselled. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Guard yourself! Snow reflection can almost double the UV radiation from the Sun.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are December temperatures in Irun?
What is the average humidity in December in Irun?
How much does it rain in Irun in December?
When does it start to snow in Irun?
How cold is the water in December in Irun?
What is the month with the shortest days in Irun?
How many hours of daylight does Irun have in December?
When are sunrise and sunset in December in Irun?
How many hours of sunshine does Irun have in December?
What are the months with the lowest UV index in Irun?
What is the UV index intensity in December in Irun?
Average temperature in December
Irun, Spain
- Average high temperature in December: 11.4°C
The warmest month (with the highest average high temperature) is August (23.3°C).
The month with the lowest average high temperature is January (9.9°C).
- Average low temperature in December: 7.5°C
The month with the highest average low temperature is August (16.9°C).
The coldest month (with the lowest average low temperature) is February (6°C).
Average pressure in December
Irun, Spain
- Average pressure in December: 1021.8mbar
The month with the highest atmospheric pressure is December (1021.8mbar).
The month with the lowest atmospheric pressure is April (1015.6mbar).
Average wind speed in December
Irun, Spain
- Average wind speed in December: 15.7km/h
The windiest month (with the highest average wind speed) is November (16.3km/h).
The calmest month (with the lowest average wind speed) is August (9.8km/h).
Average humidity in December
Irun, Spain
- Average humidity in December: 76%
The month with the highest relative humidity is June (81%).
The month with the lowest relative humidity is October (75%).
Average rainfall in December
Irun, Spain
- Average rainfall in December: 68mm
The wettest month (with the highest rainfall) is November (137mm).
The driest month (with the least rainfall) is July (42mm).
Average rainfall days in December
Irun, Spain
- Average rainfall days in December: 16 days
The month with the highest number of rainy days is May (20.2 days).
The month with the least rainy days is August (14.2 days).
Average snowfall in December
Irun, Spain
- Average snowfall in December: 2mm
The month with the highest snowfall is February (9mm).
The months with the least snowfall are April, May, June, July, August, September, October and November (0mm).
Average snowfall days in December
Irun, Spain
- Average snowfall days in December: 0.8 days
The month with the highest number of snowfall days is February (1.5 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).
Average sea temperature in December
Irun, Spain
- Average sea temperature in December: 14.3°C
The best month for swimming (with the highest average sea temperature) is August (21.4°C).
The coldest month (with the lowest average sea temperature) is February (12.4°C).
Average daylight in December /
Average sunshine in December
Irun, Spain
- Average daylight in December: 9h and 0min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in December: 5h and 2min
The month with the most sunshine is July (Average sunshine: 9h and 36min).
The month with the least sunshine is November (Average sunshine: 5h and 0min).
Average sunshine days in December
Irun, Spain
- Average sunshine days in December: 12.8 days
The month with the most sunshine days is August (13.8 days).
The months with the least sunshine days are May and November (7.8 days).
Average UV index in December
Irun, Spain
- Average UV index in December: 3
The months with the highest UV index are May, June, July, August and September (UV index 5).
The months with the lowest UV index are January, February, March, April, November and December (UV index 3).
Average cloud cover in December
Irun, Spain
- Average cloud cover in December: 45
The month with the most cloud cover is January (Cloud cover 52).
The month with the least cloud cover is September (Cloud cover 32).
Average visibility in December
Irun, Spain
- Average visibility in December: 10km
The months with the highest visibility are February, March, June, July, August, September, October and December (10km).
The months with the lowest visibility are January, April, May and November (9km).
