September weather forecast
Guadalupe, Costa Rica

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Weather in September

In September, Guadalupe's weather remains relatively stable, with minor variations from August. In contrast to previous months, the average temperature decreases slightly to 25.7°C (78.3°F), a year-round low. Despite maintaining a rainy climate, the rainfall decreases to 267mm (10.51"), presenting a brief respite from the heavy rains. Similar to August, the daylight hours continue to shorten, yet the city remains predominantly overcast due to persistent cloud cover. The wind conditions remain mild, indicating a stable weather pattern.

Temperature

September's arrival registers an average high-temperature of a still warm 25.7°C (78.3°F), closely aligning with the temperature of the previous month. A consistent average low-temperature of 21.3°C (70.3°F), with a minor variance from the daytime highs, is noted in Guadalupe during the nights of September.

Humidity

September and October, with an average relative humidity of 86%, are the most humid months in Guadalupe.

Rainfall

In Guadalupe, during September, the rain falls for 29.6 days and regularly aggregates up to 267mm (10.51") of precipitation. Throughout the year, in Guadalupe, there are 290 rainfall days, and 2270mm (89.37") of precipitation is accumulated.

Daylight

The average length of the day in September in Guadalupe is 12h and 11min.
On the first day of September in Guadalupe, sunrise is at 05:26 and sunset at 17:45. On the last day of the month, sunrise is at 05:24 and sunset at 17:27 CST.

Sunshine

The average sunshine in September in Guadalupe, Costa Rica, is 8.2h.

UV index

The months with the highest UV index in Guadalupe are January through December, with an average maximum UV index of 6. The months with the lowest UV index in Guadalupe are January through December, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation for the ordinary person.
Note: The maximum UV index of 6 during September translates into these guidelines:
Undertake precautions and comply with sun safety standards. Protection from skin and eye injury is vital. Stay in the shade and limit sun exposure from 10 a.m. to 4 p.m., when UV radiation is most potent. Keep in mind that shade structures like parasols or canopies do not offer full protection. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.
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Frequently asked questions

What is the temperature in September in Guadalupe?

In September, in Guadalupe, the average high-temperature is 25.7°C (78.3°F), and the average low-temperature is 21.3°C (70.3°F). The average heat index (a.k.a. 'real feel', 'feels like'), which factors the actual air temperature with the relative humidity, in May is computed to be 30°C (86°F).

What is the most humid month in Guadalupe?

September and October, with an average relative humidity of 86%, are most humid months.

What is the average humidity in September in Guadalupe?

In September, the average relative humidity in Guadalupe is 86%.

How many days does it rain in September in Guadalupe?

In Guadalupe, in September, during 29.6 rainfall days, 267mm (10.51") of precipitation is typically accumulated.

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

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

When is the sunrise / sunset in September in Guadalupe?

On the first day of September, sunrise is at 05:26 and sunset at 17:45. On the last day of the month, sunrise is at 05:24 and sunset at 17:27 CST.

How many hours of sunshine does Guadalupe have in September?

In September, the average sunshine duration in Guadalupe is 8.2h.

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

The months with the highest UV index in Guadalupe are January through December, with an average maximum UV index of 6.

What is the month with the lowest UV index in Guadalupe?

The months with the lowest UV index are January through December, with an average maximum UV index of 6.

What is the UV index reading in September in Guadalupe?

In September, the average daily maximum UV index in Guadalupe is 6. A UV Index reading of 6 to 7 represents a high health risk from exposure to Sun's UV rays.

Average temperature in September
Guadalupe, Costa Rica

Average temperature in September - Guadalupe, Costa Rica
  • Average high temperature in September: 25.7°C

The warmest month (with the highest average high temperature) is March (29.3°C).
The month with the lowest average high temperature is October (25.3°C).

  • Average low temperature in September: 21.3°C

The month with the highest average low temperature is April (21.9°C).
The coldest months (with the lowest average low temperature) are January, February and December (20.5°C).

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Average pressure in September
Guadalupe, Costa Rica

Average pressure in September - Guadalupe, Costa Rica
  • Average pressure in September: 1011.1mbar

The month with the highest atmospheric pressure is January (1011.8mbar).
The months with the lowest atmospheric pressure are October and November (1010.9mbar).

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Average wind speed in September
Guadalupe, Costa Rica

Average wind speed in September - Guadalupe, Costa Rica
  • Average wind speed in September: 5.3km/h

The windiest months (with the highest average wind speed) are February and March (7.6km/h).
The calmest month (with the lowest average wind speed) is June (5.2km/h).

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Average humidity in September
Guadalupe, Costa Rica

Average humidity in September - Guadalupe, Costa Rica
  • Average humidity in September: 86%

The months with the highest relative humidity are September and October (86%).
The months with the lowest relative humidity are February and March (68%).

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Average rainfall in September
Guadalupe, Costa Rica

Average rainfall in September - Guadalupe, Costa Rica
  • Average rainfall in September: 267mm

The wettest month (with the highest rainfall) is October (440mm).
The driest month (with the least rainfall) is February (18mm).

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Average rainfall days in September
Guadalupe, Costa Rica

Average rainfall days in September - Guadalupe, Costa Rica
  • Average rainfall days in September: 29.6 days

The month with the highest number of rainy days is October (30.5 days).
The month with the least rainy days is February (9.7 days).

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

Average daylight in September / Average sunshine in September - Guadalupe, 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: 8h and 1min

The month with the most sunshine is February (Average sunshine: 9h and 48min).
The month with the least sunshine is October (Average sunshine: 7h and 30min).

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Average sunshine days in September
Guadalupe, Costa Rica

Average sunshine days in September - Guadalupe, Costa Rica
  • Average sunshine days in September: 0.2 days

The month with the most sunshine days is February (13.7 days).
The month with the least sunshine days is September (0.2 days).

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Average UV index in September
Guadalupe, Costa Rica

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

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

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Average cloud cover in September
Guadalupe, Costa Rica

Average cloud cover in September - Guadalupe, Costa Rica
  • Average cloud cover in September: 45

The month with the most cloud cover is October (Cloud cover 49).
The month with the least cloud cover is February (Cloud cover 15).

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Average visibility in September
Guadalupe, Costa Rica

Average visibility in September - Guadalupe, Costa Rica
  • Average visibility in September: 9km

The months with the highest visibility are January, February, March, April and December (10km).
The months with the lowest visibility are May, June, July, August, September, October and November (9km).

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Guadalupe, Costa Rica

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