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 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
Weather in December
Temperature
San Diego greets December with an average high-temperature of a still agreeable 22.7°C (72.9°F), marking a slight deviation from the preceding month. During the December nights, an average temperature of 14.3°C (57.7°F) is observed.Humidity
In San Diego, Costa Rica, the average relative humidity in December is 83%.Rainfall
In December, the rain falls for 23 days. Throughout December, 79mm (3.11") of precipitation is accumulated. Throughout the year, in San Diego, Costa Rica, there are 305 rainfall days, and 2534mm (99.76") of precipitation is accumulated.Daylight
With an average of 11h and 36min of daylight, December has the shortest days of the year.On the first day of December in San Diego, sunrise is at 05:37 and sunset at 17:12. On the last day of the month, sunrise is at 05:52 and sunset at 17:26 CST.
Sunshine
In December, the average sunshine is 8h.UV index
January through December, with an average maximum UV index of 5, are months with the highest UV index. January through December, with an average maximum UV index of 5, are months with the lowest UV index in San Diego, Costa Rica. A UV Index estimate of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for ordinary individuals.Note: The maximum UV index, 5 during December, leads to the following recommendations:
Take precautions - Protection against skin and eye damage is obliged. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. During bright days, sunglasses that offer UVA and UVB defense are recommended.
Frequently asked questions
What is the temperature in December in San Diego?
What is the average humidity in December in San Diego?
How much does it rain in San Diego in December?
What is the month with the shortest days in San Diego?
What is the average length of the day in December in San Diego?
When are sunrise and sunset in December in San Diego?
How long on average sun shines in December in San Diego?
What is the month with the highest UV index in San Diego?
What is the month with the lowest UV index in San Diego?
What is the UV index intensity in December in San Diego?
Average temperature in December
San Diego, Costa Rica
- Average high temperature in December: 22.7°C
The warmest month (with the highest average high temperature) is April (25.3°C).
The month with the lowest average high temperature is October (22.2°C).
- Average low temperature in December: 14.3°C
The month with the highest average low temperature is May (16.9°C).
The coldest month (with the lowest average low temperature) is January (13.7°C).
Average pressure in December
San Diego, Costa Rica
- Average pressure in December: 1011.8mbar
The month with the highest atmospheric pressure is January (1012.4mbar).
The month with the lowest atmospheric pressure is October (1010.9mbar).
Average wind speed in December
San Diego, Costa Rica
- Average wind speed in December: 7.2km/h
The windiest month (with the highest average wind speed) is February (8.6km/h).
The calmest month (with the lowest average wind speed) is September (3.7km/h).
Average humidity in December
San Diego, Costa Rica
- Average humidity in December: 83%
The month with the highest relative humidity is October (90%).
The month with the lowest relative humidity is February (76%).
Average rainfall in December
San Diego, Costa Rica
- Average rainfall in December: 79mm
The wettest month (with the highest rainfall) is October (444mm).
The driest month (with the least rainfall) is February (33mm).
Average rainfall days in December
San Diego, Costa Rica
- Average rainfall days in December: 23 days
The month with the highest number of rainy days is October (30.5 days).
The month with the least rainy days is February (14.9 days).
Average daylight in December /
Average sunshine in December
San Diego, Costa Rica
- Average daylight in December: 11h and 4min
The month with the longest days is June (Average daylight: 12h and 42min).
The month with the shortest days is December (Average daylight: 11h and 36min).
- Average sunshine in December: 8h and 0min
The month with the most sunshine is February (Average sunshine: 9h and 6min).
The month with the least sunshine is October (Average sunshine: 6h and 30min).
Average sunshine days in December
San Diego, Costa Rica
- Average sunshine days in December: 4.9 days
The month with the most sunshine days is February (10.4 days).
The month with the least sunshine days is October (0.1 days).
Average UV index in December
San Diego, Costa Rica
- Average UV index in December: 5
The months with the highest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 5).
The months with the lowest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 5).
Average cloud cover in December
San Diego, Costa Rica
- Average cloud cover in December: 44
The month with the most cloud cover is October (Cloud cover 61).
The month with the least cloud cover is February (Cloud cover 31).
Average visibility in December
San Diego, Costa Rica
- Average visibility in December: 8km
The months with the highest visibility are January, February and March (9km).
The months with the lowest visibility are September and October (6km).
San Diego, Costa Rica
Weather forecast for your location
2. Allow the app to use your location
