September weather forecast
Electriona, Costa Rica

September

Weather in September

September, the first month of the autumn in Electriona, is still a warm month, with an average temperature fluctuating between 16.4°C (61.5°F) and 23°C (73.4°F).

Temperature

Transitioning into September, Electriona records an average high-temperature of a still moderately hot 23°C (73.4°F), almost identical to August's 23.3°C (73.9°F). The temperature in Electriona lowers to an average of 16.4°C (61.5°F) during September nights.

Humidity

September and October, with an average relative humidity of 91%, are the most humid months.

Rainfall

In Electriona, in September, during 29.5 rainfall days, 344mm (13.54") of precipitation is typically accumulated. Throughout the year, there are 287.8 rainfall days, and 2585mm (101.77") of precipitation is accumulated.

Daylight

The average length of the day in September is 12h and 11min.
On the first day of September, sunrise is at 05:27 and sunset at 17:45. On the last day of the month, sunrise is at 05:25 and sunset at 17:27 CST.

Sunshine

The average sunshine in September in Electriona is 6.5h.

UV index

January through December, with an average maximum UV index of 5, are months with the highest UV index in Electriona. January through December, with an average maximum UV index of 5, are months with the lowest UV index in Electriona. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.
Note: An average UV index of 5 in September transforms into this advice:
Adopt protective measures - It is advised to guard against sun damage. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. A hat with a broad brim is indispensable, filtering out up to half of UV rays.

Frequently asked questions

What is the temperature in September in Electriona?
In Electriona, in September, the average high-temperature is 23°C (73.4°F), and the average low-temperature is 16.4°C (61.5°F).
What are the most humid months in Electriona?
The months with the highest humidity in Electriona are September and October, with an average relative humidity of 91%.
What is the average humidity in September in Electriona?
In September, the average relative humidity in Electriona is 91%.
How many days does it rain in September in Electriona?
In Electriona, Costa Rica, in September, during 29.5 rainfall days, 344mm (13.54") of precipitation is typically accumulated.
What is the average length of the day in September in Electriona?
The average day length in September is 12h and 11min.
When is the sunrise / sunset in September in Electriona?
On the first day of September in Electriona, sunrise is at 05:27 and sunset at 17:45. On the last day of the month, sunrise is at 05:25 and sunset at 17:27 CST.
How many hours of sunshine does Electriona have in September?
In Electriona, the average sunshine duration in September is 6.5h.
What is the month with the highest UV index in Electriona?
The months with the highest UV index are January through December, with an average maximum UV index of 5.
What is the month with the lowest UV index in Electriona?
The months with the lowest UV index in Electriona are January through December, with an average maximum UV index of 5.
What is the UV index reading in September in Electriona?
In September, the average daily maximum UV index in Electriona, Costa Rica, is 5. A UV Index estimate of 3 to 5 represents a medium hazard to health from exposure to the Sun's UV radiation.
Average high temperature
Average low temperature
Average wind speed
Average max. wind speed
Average wind speed gusts
Average humidity
Average rainfall
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility
Average temperature in September
Electriona, Costa Rica
  • Average high temperature in September: 23°C

The warmest month (with the highest average high temperature) is April (26°C).
The month with the lowest average high temperature is October (22.4°C).

  • Average low temperature in September: 16.4°C

The month with the highest average low temperature is June (17°C).
The coldest month (with the lowest average low temperature) is January (13.8°C).

Average pressure in September
Electriona, Costa Rica
  • Average pressure in September: 1011.1mbar

The month with the highest atmospheric pressure is January (1012.3mbar).
The month with the lowest atmospheric pressure is October (1010.8mbar).

Average wind speed in September
Electriona, Costa Rica
  • Average wind speed in September: 4.3km/h

The windiest month (with the highest average wind speed) is February (10.7km/h).
The calmest month (with the lowest average wind speed) is September (4.3km/h).

Average humidity in September
Electriona, Costa Rica
  • Average humidity in September: 91%

The months with the highest relative humidity are September and October (91%).
The months with the lowest relative humidity are February and March (75%).

Average rainfall in September
Electriona, Costa Rica
  • Average rainfall in September: 344mm

The wettest month (with the highest rainfall) is October (438mm).
The driest month (with the least rainfall) is February (26mm).

Average rainfall days in September
Electriona, Costa Rica
  • Average rainfall days in September: 29.5 days

The month with the highest number of rainy days is October (30.5 days).
The month with the least rainy days is February (12.2 days).

Average daylight in September /
Average sunshine in September
Electriona, 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: 6h and 3min

The month with the most sunshine is February (Average sunshine: 9h and 12min).
The month with the least sunshine is October (Average sunshine: 5h and 48min).

Average sunshine days in September
Electriona, Costa Rica
  • Average sunshine days in September: 0.1 days

The month with the most sunshine days is March (13.5 days).
The month with the least sunshine days is September (0.1 days).

Average UV index in September
Electriona, 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).

Average cloud cover in September
Electriona, Costa Rica
  • Average cloud cover in September: 65

The month with the most cloud cover is October (Cloud cover 68).
The month with the least cloud cover is February (Cloud cover 30).

Average visibility in September
Electriona, 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 August, September, October and November (6km).

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