Weather in December
Temperature
The months of January, November and December are noted for their lowest temperatures, with an average high-temperature of 29°C (84.2°F).Rainfall
In San Juan, in December, it is raining for 13 days, with typically 44mm (1.73") of accumulated precipitation. Throughout the year, there are 154 rainfall days, and 1160mm (45.67") of precipitation is accumulated.Daylight
December has the shortest days of the year, with an average of 11h and 0min of daylight.On the first day of December in San Juan, sunrise is at 07:02 and sunset at 18:06. On the last day of the month, sunrise is at 07:17 and sunset at 18:18 AST.
Sunshine
January, May, September through December, with an average of 7h of sunshine, are months with the least sunshine.UV index
January and December, with an average maximum UV index of 8, are months with the lowest UV index in San Juan. A UV Index of 8 to 10 symbolizes a very high health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: The UV index of 8 during December leads to these advisories:
Take extra precautions. Protection against sun damage is required. UV radiation from the sun is at its strongest between 10 a.m. and 4 p.m. Try to limit direct exposure during these hours. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly.
Frequently asked questions
What are the coldest months in San Juan?
How hot is December in San Juan?
How many days does it rain in December in San Juan?
What is the month with the shortest days in San Juan?
What is the average length of the day in December in San Juan?
When are sunrise and sunset in December in San Juan?
What is the month with the least sunshine in San Juan?
How long on average sun shines in December in San Juan?
When is the lowest UV index in San Juan?
What is the UV index reading in December in San Juan?
Average temperature in December
San Juan, Dominican Republic
- Average high temperature in December: 29°C
The warmest months (with the highest average high temperature) are July, August and September (32°C).
The months with the lowest average high temperature are January, November and December (29°C).
- Average low temperature in December: 15°C
The months with the highest average low temperature are May, June, August and September (19°C).
The coldest month (with the lowest average low temperature) is January (14°C).
Average rainfall in December
San Juan, Dominican Republic
- Average rainfall in December: 44mm
The wettest month (with the highest rainfall) is May (189mm).
The driest month (with the least rainfall) is January (20mm).
Average rainfall days in December
San Juan, Dominican Republic
- Average rainfall days in December: 13 days
The month with the highest number of rainy days is October (16 days).
The months with the least rainy days are February, March and April (10 days).
Average daylight in December /
Average sunshine in December
San Juan, Dominican Republic
- Average daylight in December: 11h and 0min
The month with the longest days is June (Average daylight: 13h and 12min).
The month with the shortest days is December (Average daylight: 11h and 0min).
- Average sunshine in December: 7h
The months with the most sunshine are February, March, April, June, July and August (Average sunshine: 8h).
The months with the least sunshine are January, May, September, October, November and December (Average sunshine: 7h).
Average UV index in December
San Juan, Dominican Republic
- Average UV index in December: 8
The months with the highest UV index are March, April, May, June, July, August and September (UV index 12).
The months with the lowest UV index are January and December (UV index 8).
San Juan, Dominican Republic
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