Dominical
Costa Rica
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Dominical, Costa Rica

September, the first month of the autumn, in Dominical, is still a warm month, with average temperature fluctuating between 29°C (84.2°F) and 22°C (71.6°F).

Temperature

In Dominical, Costa Rica, the average high-temperature remains the same as in August - a still warm 29°C (84.2°F). The average low-temperature, in Dominical, is 22°C (71.6°F).

Rainfall

In Dominical, in September, during 22 rainfall days, 471mm (18.5") of precipitation is typically accumulated. Throughout the year, there are 191 rainfall days, and 3349mm (131.9") of precipitation is accumulated.

Sea temperature

Months with the warmest seawater in Dominical are March through June, August and September, with an average sea temperature of 29°C (84.2°F).
Note: 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.

Daylight

The average length of the day in September is 12.2h.

Sunshine

September and October, with an average of 5h of sunshine, are months with the least sunshine in Dominical.

UV index

Months with the highest UV index are February through October, with an average maximum UV index of 12. A UV Index of 11, and more, symbolizes an extreme threat to health from the exposure to the Sun's UV rays for the ordinary person.
Note: The average daily UV index of 12 in September transform into the following instructions:
Practice all essential precautions. Protection against sun damage is crucial. 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. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. 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. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.

What is the temperature in September in Dominical?

The average high-temperature, in September, in Dominical, Costa Rica, is 29°C (84.2°F), while the average low-temperature is 22°C (71.6°F).

How much does it rain in Dominical in September?

In Dominical, Costa Rica, during September, the rain falls for 22 days and regularly aggregates up to 471mm (18.5") of precipitation.

What are the months with the warmest sea water in Dominical?

Months with the warmest seawater in Dominical are March through June, August and September, with an average sea temperature of 29°C (84.2°F).

What is the water temperature in September in Dominical?

In Dominical, Costa Rica, the average seawater temperature in September is 29°C (84.2°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.

How many hours of daylight does Dominical have in September?

The average length of the day in September is 12.2h.

What is the month with the least sunshine in Dominical?

Months with the least sunshine in Dominical are September and October, with an average of 5h of sunshine.

How many hours of sunshine does Dominical have in September?

The average sunshine in September in Dominical is 5h.

When is the highest UV index in Dominical?

February through October, with an average maximum UV index of 12, are months with the highest UV index.

What is the UV index intensity in September in Dominical?

In September, the average daily maximum UV index in Dominical, Costa Rica, is 12. A UV Index reading of 11, and higher, represents an ultimate hazard to health from the exposure to the Sun's UV radiation.
Average temperature in September - Dominical, Costa Rica
  • Average high temperature in September: 29°C

Warmest months (with the highest average high temperature) are March and April (31°C).
Months with the lowest average high temperature are November and December (28°C).

  • Average low temperature in September: 22°C

The month with the highest average low temperature is April (24°C).
Coldest months (with the lowest average low temperature) are November and December (21°C).

Average rainfall in September - Dominical, Costa Rica
  • Average rainfall in September: 471mm

The wettest month (with the highest rainfall) is October (599mm).
The driest month (with the lowest rainfall) is February (24mm).

Average rainfall days in September - Dominical, Costa Rica
  • Average rainfall days in September: 22 days

Months with the highest number of rainy days are June, August and September (22 days).
The month with the lowest number of rainy days is March (7 days).

Average sea temperature in September - Dominical, Costa Rica
  • Average sea temperature in September: 29°C

Best months for swimming (with the highest average sea temperature) are March, April, May, June, August and September (29°C).
Coldest months (with the lowest average sea temperature) are January, February, July, October, November and December (28°C).

Average daylight in September / Average sunshine in September - Dominical, Costa Rica
  • Average daylight in September: 12.2h

The month with the longest days is June (Average daylight: 12.7h).
The month with shortest days is December (Average daylight: 11.6h).

  • Average sunshine in September: 5h

The month with most sunshine is March (Average sunshine: 8h).
Months with least sunshine are September and October (Average sunshine: 5).

Average UV index in September - Dominical, Costa Rica
  • Average UV index in September: 12

Months with the highest UV index are February, March, April, May, June, July, August, September and October (UV index 12).
The month with the lowest UV index is December (UV index 10).