September weather forecast
Rio San Juan, Dominican Republic

Weather in September

September, the first month of the autumn in Rio San Juan, is still a tropical month, with an average temperature fluctuating between 32°C (89.6°F) and 22°C (71.6°F).

Temperature

June through September, with an average high-temperature of 32°C (89.6°F), are the warmest months.

Rainfall

In Rio San Juan, in September, during 15 rainfall days, 131mm (5.16") of precipitation is typically accumulated. 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

The month with the warmest seawater in Rio San Juan is September, with an average sea temperature of 29.2°C (84.6°F).
Note: 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.

Daylight

The average length of the day in September in Rio San Juan is 12h and 15min.
On the first day of September in Rio San Juan, sunrise is at 06:24 and sunset at 18:55. On the last day of the month, sunrise is at 06:30 and sunset at 18:29 AST.

Sunshine

In September, the average sunshine in Rio San Juan is 7h.

UV index

In September, the average daily maximum UV index in Rio San Juan is 11. A UV Index estimate of 11, and higher, represents an extreme health hazard from exposure to the Sun's UV radiation for average individuals.
Note: The daily maximum UV index of 11 in September interpret into the following advice:
Take all necessary precautions, as unprotected skin can burn in minutes. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. 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. A broad-spectrum sunscreen of SPF 30+ should be liberally applied and re-applied every two hours, and immediately after an outdoor workout or a swim. Caution! The reflection of sand and water significantly increases the intensity of the Sun's UV radiation.
[Resources]

FAQ

What is the warmest month in Rio San Juan?

Warmest months are June through September, with an average high-temperature of 32°C (89.6°F).

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

In Rio San Juan, in September, during 15 rainfall days, 131mm (5.16") of precipitation is typically accumulated.

When is the sea warmest in Rio San Juan?

September is the month with the warmest seawater in Rio San Juan, with an average sea temperature of 29.2°C (84.6°F).

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

In September, the average sea temperature in Rio San Juan, Dominican Republic, is 29.2°C (84.6°F). For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

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

In Rio San Juan, the average day length in September is 12h and 15min.

When are sunrise and sunset in September in Rio San Juan?

In September, on the first day of the month, sunrise is at 06:24 and sunset at 18:55. On the last day of the month, in Rio San Juan, Dominican Republic, sunrise is at 06:30 and sunset at 18:29 AST.

How long on average sun shines in September in Rio San Juan?

The average sunshine duration in September in Rio San Juan is 7h.

What is the UV index intensity in September in Rio San Juan?

In September, the average daily maximum UV index is 11. A UV Index value of 11, and more, symbolizes an extreme health vulnerability from unprotected exposure to UV radiation.
Average rainfall days
Average sunshine
Average UV index

Average temperature in September
Rio San Juan, Dominican Republic

Average temperature in September - Rio San Juan, Dominican Republic
  • Average high temperature in September: 32°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 September: 22°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).

[Resources]

Average rainfall in September
Rio San Juan, Dominican Republic

Average rainfall in September - Rio San Juan, Dominican Republic
  • Average rainfall in September: 131mm

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

[Resources]

Average rainfall days in September
Rio San Juan, Dominican Republic

Average rainfall days in September - Rio San Juan, Dominican Republic
  • Average rainfall days in September: 15 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).

[Resources]

Average sea temperature in September
Rio San Juan, Dominican Republic

Average sea temperature in September - Rio San Juan, Dominican Republic
  • Average sea temperature in September: 29.2°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).

[Resources]

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

Average daylight in September / Average sunshine in September - Rio San Juan, Dominican Republic
  • Average daylight in September: 12h and 15min

The month with the longest days is June (Average daylight: 13h and 18min).
The month with the shortest days is December (Average daylight: 10h and 58min).

  • Average sunshine in September: 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).

[Resources]

Average UV index in September
Rio San Juan, Dominican Republic

Average UV index in September - Rio San Juan, Dominican Republic
  • Average UV index in September: 11

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).

[Resources]

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location
* you will be automatically redirected to the weather forecast for your location