Contents
- Weather in August
- Frequently asked questions
- Average temperature in August
- Average pressure in August
- Average wind speed in August
- Average humidity in August
- Average rainfall in August
- Average rainfall days in August
- Average daylight in August
- Average sunshine in August
- Average sunshine days in August
- Average UV index in August
- Average cloud cover in August
- Average visibility in August
Weather in August
Temperature
August's arrival in San Juan shows an average high-temperature of a still moderately hot 23.3°C (73.9°F), echoing the conditions of July. During August, the average low-temperature is recorded at a moderate 15.8°C (60.4°F).Humidity
In August, the average relative humidity in San Juan is 89%.Rainfall
In San Juan, during August, the rain falls for 29.2 days and regularly aggregates up to 339mm (13.35") of precipitation. In San Juan, 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 August is 12h and 26min.On the first day of August in San Juan, sunrise is at 05:26 and sunset at 17:59. On the last day of the month, sunrise is at 05:27 and sunset at 17:45 CST.
Sunshine
In August, the average sunshine is 6.7h.UV index
January through December, with an average maximum UV index of 5, are months with the highest UV index. January through December, with an average maximum UV index of 5, are months with the lowest UV index in San Juan. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for the ordinary person.Note: During August, 5 as the daily maximum UV index converts into the following advice:
Adopt protective measures - Suggestions to resist sunburn are offered. Avoiding the Sun during its peak radiation time around midday is a healthy practice. Tightly woven clothing, when worn loosely, shields effectively against the Sun.
Frequently asked questions
What is the usual temperature for San Juan in August?
What is the average humidity in August in San Juan?
How many days does it rain in August in San Juan?
What is the average length of the day in August in San Juan?
When is the sunrise / sunset in August in San Juan?
How long on average sun shines in August in San Juan?
When is the highest UV index in San Juan?
What is the month with the lowest UV index in San Juan?
How high is the UV index in August in San Juan?
Average temperature in August
San Juan, 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).
Average pressure in August
San Juan, 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).
Average wind speed in August
San Juan, 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).
Average humidity in August
San Juan, 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%).
Average rainfall in August
San Juan, 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).
Average rainfall days in August
San Juan, 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).
Average daylight in August /
Average sunshine in August
San Juan, 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).
Average sunshine days in August
San Juan, 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).
Average UV index in August
San Juan, 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).
Average cloud cover in August
San Juan, 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).
Average visibility in August
San Juan, 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).
San Juan, Costa Rica
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