July Weather in Guaynabo

Last updated: March 2, 2024

The weather in Guaynabo, Puerto Rico, during July is characterized by an average temperature of 27°C (81°F). Highs can soar to 31°C (87°F), while lows may dip to 24°C (75°F). Typically, the humidity level in Guaynabo throughout July hovers around 80%.

24°C (75°F)

Minimum temperature

27°C (81°F)

Average temperature

31°C (87°F)

Maximum temperature

80%

Humidity

Precipitation and Sunshine hours

In July, Guaynabo averages 124 mm (4.9 inches) of rainfall, typically over the course of 24 rainy days. The month enjoys an average of 13 hours 4 minutes of daylight, with the sun shining for approximately 11 hours 23 minutes each day. Additionally, there is a 38% probability of sunny days during this period.

124 mm (4.9 inches)

Precipitation

24 rainy days

Rainy days

11 hours 23 minutes

Sunshine hours

38%

Chance of sun

UV Index

In July, the UV Index in Guaynabo reaches a maximum of 12, indicating a level of Extreme exposure. The most intense UV radiation typically occurs between 12:00 and 14:00, during which unprotected skin may burn in as little as 10 minutes.

Average solar exposure data for the current time of the year. Actual values may vary and depend on many factors, such as cloud cover, vegetation cover, surface type, etc.
	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00
UVI	1	2	5	8	11	12	12	10	7	4	2	1	0
Exposure	Low		Moderate	VeryHigh	Extreme			VeryHigh	High	Moderate	Low
Time to burn	45 min		30 min	15 min	10 min			15 min	25 min	30 min	45 min