September weather forecast
Palmar, Costa Rica

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Weather in September

The first month of the autumn, September, is also a moderately hot month in Palmar, Costa Rica, with an average temperature varying between 19.2°C (66.6°F) and 26.3°C (79.3°F).

Temperature

Palmar's average high-temperature marks a still warm 26.3°C (79.3°F) with the advent of September, closely mirroring that of the preceding month. Palmar anticipates an average minimum temperature of 19.2°C (66.6°F) in the month of September.

Humidity

In Palmar, Costa Rica, the average relative humidity in September is 87%.

Rainfall

In Palmar, in September, during 29.4 rainfall days, 288mm (11.34") of precipitation is typically accumulated. In Palmar, during the entire year, the rain falls for 272 days and collects up to 2217mm (87.28") of precipitation.

Daylight

The average length of the day in September is 12h and 11min.
On the first day of September in Palmar, sunrise is at 05:28 and sunset at 17:46. On the last day of the month, sunrise is at 05:26 and sunset at 17:28 CST.

Sunshine

In Palmar, the average sunshine in September is 7.6h.

UV index

The months with the highest UV index are January through April, June, July, September, October and December, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV radiation for average individuals.
Note: The maximum UV index of 6 during September leads to these instructions:
Eschew overexposure. Those with light skin may suffer burns in fewer than 20 minutes. Avoid direct Sun exposure and stay in the shade between 10 a.m. and 4 p.m., a time when UV radiation is most intense, noting that not all shade structures offer full protection. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.
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Frequently asked questions

What are September temperatures in Palmar?

In Palmar, in September, the average high-temperature is 26.3°C (79.3°F), and the average low-temperature is 19.2°C (66.6°F). In May, the average heat index (a.k.a. 'feels like', 'apparent temperature'), which factors the actual air temperature with the relative humidity, is estimated at 32°C (89.6°F).

What is the average humidity in September in Palmar?

In September, the average relative humidity in Palmar, Costa Rica, is 87%.

How much does it rain in Palmar in September?

In Palmar, in September, during 29.4 rainfall days, 288mm (11.34") of precipitation is typically accumulated.

What is the average length of the day in September in Palmar?

The average day length in September in Palmar, Costa Rica, is 12h and 11min.

When is the sunrise / sunset in September in Palmar?

In September, on the first day of the month, sunrise is at 05:28 and sunset at 17:46. On the last day of the month, in Palmar, sunrise is at 05:26 and sunset at 17:28 CST.

How many hours of sunshine does Palmar have in September?

The average sunshine duration in September is 7.6h.

What is the month with the highest UV index in Palmar?

The months with the highest UV index in Palmar are January through April, June, July, September, October and December, with an average maximum UV index of 6.

How high is the UV index in September in Palmar?

In Palmar, the average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Palmar, Costa Rica

Average temperature in September - Palmar, Costa Rica
  • Average high temperature in September: 26.3°C

The warmest months (with the highest average high temperature) are March and April (29.7°C).
The month with the lowest average high temperature is October (25.4°C).

  • Average low temperature in September: 19.2°C

The month with the highest average low temperature is May (19.8°C).
The coldest month (with the lowest average low temperature) is January (16.8°C).

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Average pressure in September
Palmar, Costa Rica

Average pressure in September - Palmar, Costa Rica
  • Average pressure in September: 1011mbar

The month with the highest atmospheric pressure is January (1012.1mbar).
The month with the lowest atmospheric pressure is October (1010.7mbar).

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Average wind speed in September
Palmar, Costa Rica

Average wind speed in September - Palmar, Costa Rica
  • Average wind speed in September: 3.8km/h

The windiest month (with the highest average wind speed) is February (10.6km/h).
The calmest month (with the lowest average wind speed) is September (3.8km/h).

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Average humidity in September
Palmar, Costa Rica

Average humidity in September - Palmar, Costa Rica
  • Average humidity in September: 87%

The month with the highest relative humidity is October (89%).
The month with the lowest relative humidity is March (70%).

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Average rainfall in September
Palmar, Costa Rica

Average rainfall in September - Palmar, Costa Rica
  • Average rainfall in September: 288mm

The wettest month (with the highest rainfall) is October (396mm).
The driest month (with the least rainfall) is February (17mm).

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Average rainfall days in September
Palmar, Costa Rica

Average rainfall days in September - Palmar, Costa Rica
  • Average rainfall days in September: 29.4 days

The month with the highest number of rainy days is October (30.2 days).
The month with the least rainy days is February (10.3 days).

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

Average daylight in September / Average sunshine in September - Palmar, 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 4min

The month with the most sunshine is March (Average sunshine: 9h and 24min).
The month with the least sunshine is October (Average sunshine: 7h and 0min).

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Average sunshine days in September
Palmar, Costa Rica

Average sunshine days in September - Palmar, Costa Rica
  • Average sunshine days in September: 0.5 days

The month with the most sunshine days is January (16.7 days).
The month with the least sunshine days is September (0.5 days).

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Average UV index in September
Palmar, Costa Rica

Average UV index in September - Palmar, Costa Rica
  • Average UV index in September: 6

The months with the highest UV index are January, February, March, April, June, July, September, October and December (UV index 6).
The months with the lowest UV index are May, August and November (UV index 5).

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Average cloud cover in September
Palmar, Costa Rica

Average cloud cover in September - Palmar, Costa Rica
  • Average cloud cover in September: 50

The month with the most cloud cover is October (Cloud cover 54).
The month with the least cloud cover is February (Cloud cover 19).

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Average visibility in September
Palmar, Costa Rica

Average visibility in September - Palmar, Costa Rica
  • Average visibility in September: 7km

The months with the highest visibility are February and March (10km).
The months with the lowest visibility are August, September, October and November (7km).

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Palmar, Costa Rica

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