The hottest month in Mayaguez is June when the average maximum temperature is 33°, average temperature is 29° and average minimum temperature is 26°.
The coolest month in Mayaguez is February when the average maximum temperature is 30°, average temperature is 25° and average minimum temperature is 21°.
The longest days in Mayaguez are in June, with an average of 13.2 hours of daylight per day. December has the shortest days with an average of 11 hours of daylight per day.
The sunniest days in Mayaguez are in September which has the most hours of sunshine per day with an average of 9.2 hours of sunshine per day, making it a sunny month with few clouds. January has the least sunshine with an average of 5 hours of sunshine per day, making it a sunny month that is overcast at times.
The ultraviolet index is the highest in April when it reaches 13.7 and lowest in December when it reaches 7.7.
An ultraviolet index reading above 11 indicates an extreme risk of harm from unprotected sun exposure. Unprotected skin risks burning in less than 10 minutes. Take all precautions because unprotected skin and eyes can burn in minutes. Tanning will be safest before 10am and after 4pm but only with a good application of sun screen. For those with sensitive skin stay in the shade and wear protective clothing, a wide-brimmed hat, and UV-blocking sunglasses. Generously apply broad spectrum SPF 30+ sunscreen every 2 hours, even on cloudy days. Watch out for relections from water that may increase ultraviolet exposure.
The warmest sea water temperatures in Mayaguez are found in September when they peak at 29° and lowest in February when they dip to 26°.
The sea is excellent for swimming all year round as the water temperature is very warm and ideal for relaxing and swimming for the whole day.
The most humid month in Mayaguez is June with a dew point (an indicator of humidity) of 25° which is very uncomfortable and fairly oppressive unless you are on a beach. At night you would most likely require airconditioning.
The least humid month in Mayaguez is February with a dew point of 21° which is somewhat uncomfortable for most people in cities but fine on a beach.
The most windy month in Mayaguez is March when the average maximum windspeed is 25kmh and the average wind speed is 15kmh.
The least windy month in Mayaguez is June when the average maximum windspeed is 19kmh and the average wind speed is 11kmh.