September weather forecast and climate
Jericó, Costa Rica

Weather in September

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

Temperature

In September, the average high-temperature is essentially the same as in August - a still moderately hot 23°C (73.4°F). In September, in Jericó, the average low-temperature is 16.4°C (61.5°F).

Humidity

Months with the highest humidity in Jericó are September and October, with an average relative humidity of 91%.

Rainfall

In Jericó, it is raining for 29.5 days, with typically 344mm (13.54") of accumulated precipitation. In Jericó, Costa Rica, during the entire year, the rain falls for 287.8 days and collects up to 2585mm (101.77") of precipitation.

Daylight

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

Sunshine

In Jericó, Costa Rica, the average sunshine is 6.5h.

UV index

Months with the highest UV index are January through December, with an average maximum UV index of 5. January through December, with an average maximum UV index of 5, are months with the lowest UV index. A UV Index of 3 to 5 symbolizes a moderate health risk from the exposure to the Sun's UV radiation for average individuals.
Note: The daily maximum UV index of 5 interpret into the following advice:
Take precautions - Protection against sunburn is recommended. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What is the most humid month in Jericó?

Months with the highest humidity are September and October, with an average relative humidity of 91%.

What is the average humidity in September in Jericó?

In September, the average relative humidity in Jericó, Costa Rica, is 91%.

How many days does it rain in September in Jericó?

In September, in Jericó, Costa Rica, the rain falls for 29.5 days. Throughout September, 344mm (13.54") of precipitation is accumulated.

How many hours of daylight does Jericó have in September?

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

How long on average sun shines in September in Jericó?

The average sunshine in September in Jericó, Costa Rica, is 6.5h.

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

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

When is the lowest UV index in Jericó?

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

What is the UV index reading in September in Jericó?

The average daily maximum UV index in September in Jericó is 5. A UV Index value of 3 to 5 symbolizes a medium hazard to health from unsafe exposure to the Sun's UV rays.

Average temperature in September
Jericó, Costa Rica

Average temperature in September - Jericó, 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).

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Average pressure in September
Jericó, Costa Rica

Average pressure in September - Jericó, 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).

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Average wind speed in September
Jericó, Costa Rica

Average wind speed in September - Jericó, 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).

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Average humidity in September
Jericó, Costa Rica

Average humidity in September - Jericó, Costa Rica
  • Average humidity in September: 91%

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

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Average rainfall in September
Jericó, Costa Rica

Average rainfall in September - Jericó, 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).

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Average rainfall days in September
Jericó, Costa Rica

Average rainfall days in September - Jericó, 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).

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

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

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

  • Average sunshine in September: 6.5h

The month with the most sunshine is February (Average sunshine: 9.2h).
The month with the least sunshine is October (Average sunshine: 5.8h).

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Average sunshine days in September
Jericó, Costa Rica

Average sunshine days in September - Jericó, 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).

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Average UV index in September
Jericó, Costa Rica

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

Months with the highest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 5).
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
Jericó, Costa Rica

Average cloud cover in September - Jericó, 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).

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Average visibility in September
Jericó, Costa Rica

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

Months with the highest visibility are January, February and March (9km).
Months with the lowest visibility are August, September, October and November (6km).

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