Weather in January
Temperature
In San Juan, the coldest period comes during January, November and December, when the average high-temperature touches 29°C (84.2°F).Rainfall
January is the month with the least rainfall. Rain falls for 12 days and accumulates 20mm (0.79") of precipitation.Daylight
The average length of the day in January in San Juan is 11h and 8min.On the first day of the month, sunrise is at 07:18 and sunset at 18:19. On the last day of January, sunrise is at 07:19 and sunset at 18:37 AST.
Sunshine
January, May, September through December, with an average of 7h of sunshine, are months with the least sunshine.UV index
The months with the lowest UV index are January and December, with an average maximum UV index of 8. A UV Index estimate of 8 to 10 represents a very high health hazard from exposure to the Sun's UV radiation for the ordinary person.Note: In January, the UV index of 8 transforms into the following advice:
Being careless can result in skin and eye damage. Always take the necessary safety measures. Avoid direct Sun exposure and stay in the shade between 10 a.m. and 4 p.m., a time when UV radiation is most intense, noting that not all shade structures offer full protection. Boost your sun resistance with garments that are densely woven yet spacious.
Frequently asked questions
What time of the year is the coldest in San Juan?
How hot is it in San Juan in January?
What is the driest month in San Juan?
How many days does it rain in January in San Juan?
How many hours of daylight does San Juan have in January?
What time are sunrise and sunset in January in San Juan?
What are the months with the least sunshine in San Juan?
How long on average sun shines in January in San Juan?
When is the lowest UV index in San Juan?
How high is the UV index in January in San Juan?
Average temperature in January
San Juan, Dominican Republic
- Average high temperature in January: 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 January: 14°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 January
San Juan, Dominican Republic
- Average rainfall in January: 20mm
The wettest month (with the highest rainfall) is May (189mm).
The driest month (with the least rainfall) is January (20mm).
Average rainfall days in January
San Juan, Dominican Republic
- Average rainfall days in January: 12 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 January /
Average sunshine in January
San Juan, Dominican Republic
- Average daylight in January: 11h and 1min
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 January: 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 January
San Juan, Dominican Republic
- Average UV index in January: 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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