January weather forecast
Rio San Juan, Dominican Republic

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Weather in January

An increasing trend towards sunny conditions marks the start of the year in the coastal city of Rio San Juan. An average month brings significant rainfall with up to 135mm (5.31"), a fact not unfamiliar to long-term dwellers. This, however, does not deter the gentle sunlight that persists within the city. Come late January, the daylight hours increase, fostering a warmer atmosphere. Nonetheless, it is advisable to keep those umbrellas handy to account for latent rainfall.

Temperature

The lowest level of Rio San Juan's temperatures is noted during January, February and December, averaging a high-temperature of 28°C (82.4°F).

Rainfall

In Rio San Juan, in January, it is raining for 14 days, with typically 135mm (5.31") of accumulated precipitation. In Rio San Juan, during the entire year, the rain falls for 162 days and collects up to 1895mm (74.61") of precipitation.

Sea temperature

In Rio San Juan, Dominican Republic, the average seawater temperature in January is 26.2°C (79.2°F).
Note: In water activities such as swimming and diving, temperatures from 25°C (77°F) to 29°C (84.2°F) are deemed highly pleasurable for extended periods without any unease.

Daylight

The average length of the day in January in Rio San Juan, Dominican Republic, is 11h and 6min.
On the first day of the month, sunrise is at 07:14 and sunset at 18:12. On the last day of January, sunrise is at 07:15 and sunset at 18:31 AST.

Sunshine

The average sunshine in January in Rio San Juan is 7h.

UV index

In January, the average daily maximum UV index in Rio San Juan is 8. A UV Index value of 8 to 10 symbolizes a very high health hazard from exposure to the Sun's UV rays for the average person.
Note: A typical high UV index of 8 in January suggests the following recommendations:
Ensure safety measures are in place, as skin and eyes are vulnerable to quick damage. Be aware that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. and try to reduce direct sun exposure during this period as much as possible. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat. Alert! UV radiation becomes sharper due to reflections from sand and water.

Frequently asked questions

What is the coldest month in Rio San Juan?

January, February and December, with an average high-temperature of 28°C (82.4°F), are marked as the coldest months in Rio San Juan.

How hot does it get in Rio San Juan in January?

The high-temperature, in January, in Rio San Juan, is 28°C (82.4°F), while the low-temperature averages to 19°C (66.2°F).

How much does it rain in Rio San Juan in January?

In January, in Rio San Juan, Dominican Republic, the rain falls for 14 days. Throughout January, 135mm (5.31") of precipitation is accumulated.

What is the sea water temperature in January in Rio San Juan?

In Rio San Juan, the average seawater temperature in January is 26.2°C (79.2°F). Water temperature between 25°C (77°F) and 29°C (84.2°F) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

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

The average day length in January in Rio San Juan, Dominican Republic, is 11h and 6min.

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

In January, on the first day of the month, sunrise is at 07:14 and sunset at 18:12. On the last day of the month, in Rio San Juan, Dominican Republic, sunrise is at 07:15 and sunset at 18:31 AST.

How many hours of sunshine does Rio San Juan have in January?

In January, the average sunshine duration is 7h.

What is the UV index reading in January in Rio San Juan?

The average daily maximum UV index in January in Rio San Juan, Dominican Republic, is 8. A UV Index of 8 to 10 symbolizes a very high health threat from exposure to Sun's UV rays.
Average rainfall days
Average daylight
Average sunshine
Average UV index

Average temperature in January
Rio San Juan, Dominican Republic

Average temperature in January - Rio San Juan, Dominican Republic
  • Average high temperature in January: 28°C

The warmest months (with the highest average high temperature) are June, July, August and September (32°C).
The months with the lowest average high temperature are January, February and December (28°C).

  • Average low temperature in January: 19°C

The months with the highest average low temperature are June, July, August and September (22°C).
The coldest months (with the lowest average low temperature) are January, February and March (19°C).

Average rainfall in January
Rio San Juan, Dominican Republic

Average rainfall in January - Rio San Juan, Dominican Republic
  • Average rainfall in January: 135mm

The wettest month (with the highest rainfall) is November (268mm).
The driest month (with the least rainfall) is February (103mm).

Average rainfall days in January
Rio San Juan, Dominican Republic

Average rainfall days in January - Rio San Juan, Dominican Republic
  • Average rainfall days in January: 14 days

The months with the highest number of rainy days are August and October (16 days).
The month with the least rainy days is April (10 days).

Average sea temperature in January
Rio San Juan, Dominican Republic

Average sea temperature in January - Rio San Juan, Dominican Republic
  • Average sea temperature in January: 26.2°C

The best month for swimming (with the highest average sea temperature) is September (29.2°C).
The coldest month (with the lowest average sea temperature) is February (25.7°C).

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

Average daylight in January / Average sunshine in January - Rio San Juan, Dominican Republic
  • Average daylight in January: 11h and 1min

The month with the longest days is June (Average daylight: 13h and 18min).
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 June, July and August (Average sunshine: 8h).
The months with the least sunshine are November and December (Average sunshine: 6h).

Average UV index in January
Rio San Juan, Dominican Republic

Average UV index in January - Rio San Juan, Dominican Republic
  • Average UV index in January: 8

The months with the highest UV index are March, April, May, June, July and August (UV index 12).
The month with the lowest UV index is December (UV index 7).

Rio San Juan, Dominican Republic

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