January weather forecast
San Juan, Dominican Republic

Weather in January

January, like December, in San Juan, Dominican Republic, is another warm winter month, with an average temperature ranging between min 14°C (57.2°F) and max 29°C (84.2°F).

Temperature

The coldest months are January, November and December, with an average high-temperature of 29°C (84.2°F).

Rainfall

The month with the least rainfall in San Juan is January, when the rain falls for 12 days and typically collects 20mm (0.79") of precipitation.

Daylight

In January, the average length of the day 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 18:38 AST.

Sunshine

The months with the least sunshine in San Juan are January, May, September through December, with an average of 7h of sunshine.

UV index

January and December, with an average maximum UV index of 8, are months with the lowest UV index. A UV Index estimate of 8 to 10 represents a very high health risk from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The daily maximum UV index of 8 in January interpret into the following advice:
Take special precautions, as unprotected eyes and skin can be burned and damaged quickly. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What are the coldest months in San Juan?

January, November and December, with an average high-temperature of 29°C (84.2°F), are the coldest months in San Juan, Dominican Republic.

What is the driest month in San Juan?

January is the month with the least rainfall in San Juan. Rain falls for 12 days and accumulates 20mm (0.79") of precipitation.

How much does it rain in San Juan in January?

In January, in San Juan, the rain falls for 12 days. Throughout January, 20mm (0.79") of precipitation is accumulated.

What is the average length of the day in January in San Juan?

In San Juan, Dominican Republic, the average day length in January is 11h and 8min.

What time are sunrise and sunset in January in San Juan?

In January, on the first day of the month, sunrise is at 07:18 and sunset at 18:19. On the last day of the month, sunrise is at 07:19 and sunset at 18:38 AST.

What is the month with the least sunshine in San Juan?

January, May, September through December, with an average of 7h of sunshine, are months with the least sunshine in San Juan.

How long on average sun shines in January in San Juan?

The average sunshine duration in January is 7h.

What is the month with the lowest UV index in San Juan?

The months with the lowest UV index in San Juan, Dominican Republic, are January and December, with an average maximum UV index of 8.

How high is the UV index in January in San Juan?

In January, the average daily maximum UV index in San Juan is 8. A UV Index value of 8 to 10 symbolizes a very high health risk from exposure to Sun's UV rays.
Average rainfall days
Average sunshine
Average UV index

Average temperature in January
San Juan, Dominican Republic

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).

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Average rainfall in January
San Juan, Dominican Republic

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).

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Average rainfall days in January
San Juan, Dominican Republic

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).

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Average daylight in January /
Average sunshine in January
San Juan, Dominican Republic

Average daylight in January / Average sunshine in January - San Juan, Dominican Republic
  • Average daylight in January: 11h and 8min

The month with the longest days is June (Average daylight: 13h and 15min).
The month with the shortest days is December (Average daylight: 11h and 1min).

  • 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).

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Average UV index in January
San Juan, Dominican Republic

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).

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