August weather forecast
San Isidro, Costa Rica

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Weather in August

San Isidro's August weather continues the rhythm set by July, with no change in the maximum temperature. This consistency in atmospheric conditions do mimic the previous month and foretells the near future. However, a crucial point to note is the slight increase in wind speed to 5.5km/h (3.4mph). This upswing, though marginal, slightly refreshes the overall climate, easing the effects of high humidity. Still set deep in the rainy season, August conveys its own tranquil and misty charm.

Temperature

As July transitions into August, San Isidro records an average high-temperature of a still moderately hot 23.3°C (73.9°F), consistent with the preceding month. In San Isidro, an average low-temperature of 15.8°C (60.4°F) is recorded during August nights.

Humidity

In August, the average relative humidity in San Isidro is 89%.

Rainfall

In August, the rain falls for 29.2 days. Throughout August, 339mm (13.35") of precipitation is 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 August in San Isidro, Costa Rica, is 12h and 26min.
On the first day of the month, sunrise is at 05:25 and sunset at 17:58. On the last day of August, in San Isidro, sunrise is at 05:26 and sunset at 17:45 CST.

Sunshine

In San Isidro, Costa Rica, the average sunshine in August is 6.7h.

UV index

January through December, with an average maximum UV index of 5, are months with the highest UV index in San Isidro, Costa Rica. The months with the lowest UV index are January through December, with an average maximum UV index of 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.
Note: In August, an average UV index of 5 transforms into the following instructions:
Act with care - The need to guard against sun damage is communicated. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.
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Frequently asked questions

What is the temperature in August in San Isidro?

August temperatures in San Isidro, Costa Rica, vary between a high-temperature of 23.3°C (73.9°F) and a low-temperature of 15.8°C (60.4°F).

What is the average humidity in August in San Isidro?

In August, the average relative humidity in San Isidro is 89%.

How much does it rain in San Isidro in August?

In August, the rain falls for 29.2 days. Throughout August, 339mm (13.35") of precipitation is accumulated.

What is the average length of the day in August in San Isidro?

In San Isidro, Costa Rica, the average day length in August is 12h and 26min.

When are sunrise and sunset in August in San Isidro?

In August, on the first day of the month, sunrise is at 05:25 and sunset at 17:58. On the last day of the month, in San Isidro, Costa Rica, sunrise is at 05:26 and sunset at 17:45 CST.

How long on average sun shines in August in San Isidro?

In August, the average sunshine duration is 6.7h.

What are the months with the highest UV index in San Isidro?

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

When is the lowest UV index in San Isidro?

January through December, with an average maximum UV index of 5, are months with the lowest UV index in San Isidro, Costa Rica.

What is the UV index intensity in August in San Isidro?

In San Isidro, Costa Rica, the average daily maximum UV index in August is 5. A UV Index estimate of 3 to 5 represents a medium health risk from unprotected exposure to UV radiation.

Average temperature in August
San Isidro, Costa Rica

Average temperature in August - San Isidro, Costa Rica
  • Average high temperature in August: 23.3°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 August: 15.8°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 August
San Isidro, Costa Rica

Average pressure in August - San Isidro, Costa Rica
  • Average pressure in August: 1011.3mbar

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 August
San Isidro, Costa Rica

Average wind speed in August - San Isidro, Costa Rica
  • Average wind speed in August: 5.5km/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 August
San Isidro, Costa Rica

Average humidity in August - San Isidro, Costa Rica
  • Average humidity in August: 89%

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

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Average rainfall in August
San Isidro, Costa Rica

Average rainfall in August - San Isidro, Costa Rica
  • Average rainfall in August: 339mm

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 August
San Isidro, Costa Rica

Average rainfall days in August - San Isidro, Costa Rica
  • Average rainfall days in August: 29.2 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 August /
Average sunshine in August
San Isidro, Costa Rica

Average daylight in August / Average sunshine in August - San Isidro, Costa Rica
  • Average daylight in August: 12h and 2min

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 August: 6h and 4min

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).

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Average sunshine days in August
San Isidro, Costa Rica

Average sunshine days in August - San Isidro, Costa Rica
  • Average sunshine days in August: 0.7 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 August
San Isidro, Costa Rica

Average UV index in August - San Isidro, Costa Rica
  • Average UV index in August: 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 August
San Isidro, Costa Rica

Average cloud cover in August - San Isidro, Costa Rica
  • Average cloud cover in August: 61

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 August
San Isidro, Costa Rica

Average visibility in August - San Isidro, Costa Rica
  • Average visibility in August: 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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San Isidro, Costa Rica

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