July weather forecast
San Juan, Costa Rica

July

Weather in July

July in San Juan witnesses slight rainfall reduction, dropping to 301mm (11.85") from June's 378mm (14.88"). This period boasts an average high-temperature of 23.3°C (73.9°F). July symbolizes the heart of San Juan's rainy season, despite a slight respite from June’s high rainfall. The daily wind speeds remain relatively stable throughout the month. A dense cloud cover is characteristic, yet the city experiences a fair amount of sunshine.

Temperature

The high temperature recorded in San Juan during July, at a still moderately hot 23.3°C (73.9°F), shows minimal deviation from June. The nights of July anticipate an average low-temperature of 15.8°C (60.4°F).

Humidity

The average relative humidity in July is 89%.

Rainfall

In San Juan, during July, the rain falls for 29.7 days and regularly aggregates up to 301mm (11.85") of precipitation. Throughout the year, there are 287.8 rainfall days, and 2585mm (101.77") of precipitation is accumulated.

Daylight

In July, the average length of the day is 12h and 38min.
On the first day of the month, sunrise is at 05:19 and sunset at 18:01. On the last day of July, sunrise is at 05:25 and sunset at 17:59 CST.

Sunshine

In July, the average sunshine is 7.1h.

UV index

The months with the highest UV index in San Juan are January through December, with an average maximum UV index of 5. The months with the lowest UV index in San Juan, Costa Rica, are January through December, with an average maximum UV index of 5. A UV Index reading of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for average individuals.
Note: An average maximum UV index of 5 in July leads to these recommendations:
Take heed. Individuals of lighter complexion can be burned in less than half an hour. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.

Frequently asked questions

What are July temperatures in San Juan?
The average high-temperature and low-temperature during July are 23.3°C (73.9°F) and 15.8°C (60.4°F) respectively.
What is the average humidity in July in San Juan?
The average relative humidity in July in San Juan, Costa Rica, is 89%.
How much does it rain in San Juan in July?
In San Juan, Costa Rica, in July, during 29.7 rainfall days, 301mm (11.85") of precipitation is typically accumulated.
How many hours of daylight does San Juan have in July?
The average day length in July is 12h and 38min.
When is the sunrise / sunset in July in San Juan?
On the first day of July in San Juan, sunrise is at 05:19 and sunset at 18:01. On the last day of the month, sunrise is at 05:25 and sunset at 17:59 CST.
How many hours of sunshine does San Juan have in July?
The average sunshine duration in July is 7.1h.
What is the month with the highest UV index in San Juan?
January through December, with an average maximum UV index of 5, are months with the highest UV index.
What is the month with the lowest UV index in San Juan?
The months with the lowest UV index in San Juan are January through December, with an average maximum UV index of 5.
What is the UV index reading in July in San Juan?
In July, the average daily maximum UV index in San Juan, Costa Rica, is 5. A UV Index estimate of 3 to 5 represents a moderate health threat 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 July
San Juan, Costa Rica
  • Average high temperature in July: 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 July: 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 July
San Juan, Costa Rica
  • Average pressure in July: 1011.5mbar

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 July
San Juan, Costa Rica
  • Average wind speed in July: 6.8km/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 July
San Juan, Costa Rica
  • Average humidity in July: 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 July
San Juan, Costa Rica
  • Average rainfall in July: 301mm

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

Average rainfall days in July
San Juan, Costa Rica
  • Average rainfall days in July: 29.7 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 July /
Average sunshine in July
San Juan, Costa Rica
  • Average daylight in July: 12h and 4min

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 July: 7h and 1min

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 July
San Juan, Costa Rica
  • Average sunshine days in July: 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 July
San Juan, Costa Rica
  • Average UV index in July: 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 July
San Juan, Costa Rica
  • Average cloud cover in July: 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 July
San Juan, Costa Rica
  • Average visibility in July: 7km

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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