September weather forecast
Paraíso, Costa Rica

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Weather in September

Continuing the legacy of the wet season, September experiences a further increase in rainfall to 320mm (12.6"). Cloud cover persists, and the hours of sunshine remain relatively constant at about 7.3 each day. Despite the intensified downpour and overcast skies, the temperature remains fairly stable. Amid the intensifying rain-drenched season, the wind continues to perform its cooling magic. September presents a unique vibe by amplifying the quintessential elements of the wet season.

Temperature

As Paraíso, Costa Rica, steps into September, the average high-temperature holds at a pleasant 22.9°C (73.2°F), hinting at a minor fluctuation from the prior month. In the month of September, Paraíso experiences an average low-temperature of 16.5°C (61.7°F).

Humidity

In Paraíso, the average relative humidity in September is 89%.

Rainfall

In Paraíso, during September, the rain falls for 29.7 days and regularly aggregates up to 320mm (12.6") of precipitation. In Paraíso, Costa Rica, during the entire year, the rain falls for 305 days and collects up to 2534mm (99.76") of precipitation.

Daylight

The average length of the day in September in Paraíso, Costa Rica, is 12h and 11min.
On the first day of the month, sunrise is at 05:26 and sunset at 17:44. On the last day of September, in Paraíso, sunrise is at 05:23 and sunset at 17:26 CST.

Sunshine

In September, the average sunshine is 7.3h.

UV index

January through December, with an average maximum UV index of 5, are months with the highest UV index. The months with the lowest UV index in Paraíso are January through December, with an average maximum UV index of 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The maximum UV index, 5 during September, leads to the following recommendations:
Guard yourself - Precautionary measures against sun damage are advocated. It's recommended to limit sun exposure when its radiation is at its peak during midday. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit.
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Frequently asked questions

What are September temperatures in Paraíso?

An average high-temperature, in September, in Paraíso, is 22.9°C (73.2°F) and the average low-temperature is 16.5°C (61.7°F).

What is the average humidity in September in Paraíso?

In September, the average relative humidity in Paraíso is 89%.

How much does it rain in Paraíso in September?

In September, in Paraíso, Costa Rica, the rain falls for 29.7 days. Throughout September, 320mm (12.6") of precipitation is accumulated.

How many hours of daylight does Paraíso have in September?

In Paraíso, Costa Rica, the average day length in September is 12h and 11min.

When is the sunrise / sunset in September in Paraíso?

In September, on the first day of the month, sunrise is at 05:26 and sunset at 17:44. On the last day of the month, in Paraíso, sunrise is at 05:23 and sunset at 17:26 CST.

How many hours of sunshine does Paraíso have in September?

In September, the average sunshine duration in Paraíso, Costa Rica, is 7.3h.

What are the months with the highest UV index in Paraíso?

The months with the highest UV index are January through December, with an average maximum UV index of 5.

What are the months with the lowest UV index in Paraíso?

January through December, with an average maximum UV index of 5, are months with the lowest UV index in Paraíso.

What is the UV index intensity in September in Paraíso?

In Paraíso, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from unprotected exposure to UV radiation.

Average temperature in September
Paraíso, Costa Rica

Average temperature in September - Paraíso, Costa Rica
  • Average high temperature in September: 22.9°C

The warmest month (with the highest average high temperature) is April (25.3°C).
The month with the lowest average high temperature is October (22.2°C).

  • Average low temperature in September: 16.5°C

The month with the highest average low temperature is May (16.9°C).
The coldest month (with the lowest average low temperature) is January (13.7°C).

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Average pressure in September
Paraíso, Costa Rica

Average pressure in September - Paraíso, Costa Rica
  • Average pressure in September: 1011.2mbar

The month with the highest atmospheric pressure is January (1012.4mbar).
The month with the lowest atmospheric pressure is October (1010.9mbar).

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Average wind speed in September
Paraíso, Costa Rica

Average wind speed in September - Paraíso, Costa Rica
  • Average wind speed in September: 3.7km/h

The windiest month (with the highest average wind speed) is February (8.6km/h).
The calmest month (with the lowest average wind speed) is September (3.7km/h).

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Average humidity in September
Paraíso, Costa Rica

Average humidity in September - Paraíso, Costa Rica
  • Average humidity in September: 89%

The month with the highest relative humidity is October (90%).
The month with the lowest relative humidity is February (76%).

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Average rainfall in September
Paraíso, Costa Rica

Average rainfall in September - Paraíso, Costa Rica
  • Average rainfall in September: 320mm

The wettest month (with the highest rainfall) is October (444mm).
The driest month (with the least rainfall) is February (33mm).

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Average rainfall days in September
Paraíso, Costa Rica

Average rainfall days in September - Paraíso, Costa Rica
  • Average rainfall days in September: 29.7 days

The month with the highest number of rainy days is October (30.5 days).
The month with the least rainy days is February (14.9 days).

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Average daylight in September /
Average sunshine in September
Paraíso, Costa Rica

Average daylight in September / Average sunshine in September - Paraíso, Costa Rica
  • Average daylight in September: 12h and 1min

The month with the longest days is June (Average daylight: 12h and 42min).
The month with the shortest days is December (Average daylight: 11h and 36min).

  • Average sunshine in September: 7h and 2min

The month with the most sunshine is February (Average sunshine: 9h and 6min).
The month with the least sunshine is October (Average sunshine: 6h and 30min).

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Average sunshine days in September
Paraíso, Costa Rica

Average sunshine days in September - Paraíso, Costa Rica
  • Average sunshine days in September: 0.3 days

The month with the most sunshine days is February (10.4 days).
The month with the least sunshine days is October (0.1 days).

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Average UV index in September
Paraíso, Costa Rica

Average UV index in September - Paraíso, Costa Rica
  • Average UV index in September: 5

The months with the highest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 5).
The months with the lowest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 5).

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Average cloud cover in September
Paraíso, Costa Rica

Average cloud cover in September - Paraíso, Costa Rica
  • Average cloud cover in September: 56

The month with the most cloud cover is October (Cloud cover 61).
The month with the least cloud cover is February (Cloud cover 31).

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Average visibility in September
Paraíso, Costa Rica

Average visibility in September - Paraíso, Costa Rica
  • Average visibility in September: 6km

The months with the highest visibility are January, February and March (9km).
The months with the lowest visibility are September and October (6km).

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Paraíso, Costa Rica

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