Contents
- Weather in April
- Frequently asked questions
- Average temperature in April
- Average pressure in April
- Average wind speed in April
- Average humidity in April
- Average rainfall in April
- Average rainfall days in April
- Average sea temperature in April
- Average daylight in April
- Average sunshine in April
- Average sunshine days in April
- Average UV index in April
- Average cloud cover in April
- Average visibility in April
Weather in April
Temperature
San Juan, Puerto Rico, signifies an average high-temperature of a still warm 81.1°F (27.3°C) in April, closely mirroring the 79.9°F (26.6°C) of March. Night temperatures in April in San Juan, Puerto Rico, exhibit a subtle decrease, settling at an average of 75.2°F (24°C).Heat index
For most parts of April, the heat index is calculated to be a hot 86°F (30°C). Enduring exposure and ongoing activity could cause a sense of fatigue and subsequent heat cramps.Heat index's context suggests values are appropriate for shady areas and slight breezes. Direct sunlight might cause an increase of up to 15 Fahrenheit (8 Celsius) degrees in the heat index.
Note: The heat index, also known as 'feels like' or 'apparent temperature', melds the effects of warmth and moisture to generate a feeling of heat. An individual's perception of weather can be affected by a variety of elements including metabolic differences, being pregnant, and their level of physical exertion. Consider the fact that direct sun exposure can influence how hot one feels, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Children often overlook the necessity for resting and fluid replenishment. Thirst is a late sign of dehydration - thus, it is critical to stay hydrated, especially during extended periods of physical activities.
Humidity
The average relative humidity in April in San Juan is 77%.Rainfall
April is the month with the least rainfall. Rain falls for 12.4 days and accumulates 0.55" (14mm) of precipitation.Ocean temperature
In San Juan, in April, the average water temperature is 80.4°F (26.9°C).Note: Water temperatures between 77°F (25°C) and 84.2°F (29°C) are regarded as very warm, ensuring all water activities are pleasurable for extended periods without feeling uneasy.
Daylight
The average length of the day in April in San Juan is 12h and 34min.On the first day of the month, sunrise is at 6:17 am and sunset at 6:38 pm. On the last day of April, sunrise is at 5:57 am and sunset at 6:45 pm AST.
Sunshine
In April, the average sunshine in San Juan, Puerto Rico, is 9.1h.UV index
April through November, with an average maximum UV index of 7, are months with the highest UV index in San Juan. A UV Index reading of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The UV index of 7 in April translates into these instructions:
Follow precautions and abide by sun safety rules. Deterrence of sunburn is imperative. Stay in the shade and limit direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is particularly strong. Remember, however, that shade structures may not provide complete protection. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears. Warning! The reflection of sand and water increases the UV dose.
Frequently asked questions
What is the usual temperature for San Juan in April?
What is the average humidity in April in San Juan?
What is the driest month in San Juan?
How much does it rain in San Juan in April?
What is the ocean temperature in April in San Juan?
What is the average length of the day in April in San Juan?
What time are sunrise and sunset in April in San Juan?
How many hours of sunshine does San Juan have in April?
What are the months with the highest UV index in San Juan?
How high is the UV index in April in San Juan?
Average temperature in April
San Juan, PR
- Average high temperature in April: 81.1°F
The warmest month (with the highest average high temperature) is August (85.1°F).
The months with the lowest average high temperature are January and March (79.9°F).
- Average low temperature in April: 75.2°F
The months with the highest average low temperature are August, September and October (79.2°F).
The coldest month (with the lowest average low temperature) is March (73.9°F).
Average pressure in April
San Juan, PR
- Average pressure in April: 29.99"Hg
The months with the highest atmospheric pressure are January and February (30.02"Hg).
The month with the lowest atmospheric pressure is October (29.9"Hg).
Average wind speed in April
San Juan, PR
- Average wind speed in April: 9.4mph
The windiest month (with the highest average wind speed) is July (10.7mph).
The calmest month (with the lowest average wind speed) is October (7.4mph).
Average humidity in April
San Juan, PR
- Average humidity in April: 77%
The months with the highest relative humidity are May, June and July (79%).
The months with the lowest relative humidity are February and March (76%).
Average rainfall in April
San Juan, PR
- Average rainfall in April: 0.55"
The wettest month (with the highest rainfall) is November (1.57").
The driest month (with the least rainfall) is April (0.55").
Average rainfall days in April
San Juan, PR
- Average rainfall days in April: 12.4 days
The month with the highest number of rainy days is November (16.1 days).
The month with the least rainy days is June (10.3 days).
Average sea temperature in April
San Juan, PR
- Average sea temperature in April: 80.5°F
The best month for swimming (with the highest average sea temperature) is September (84.9°F).
The coldest month (with the lowest average sea temperature) is February (78.9°F).
Average daylight in April /
Average sunshine in April
San Juan, PR
- Average daylight in April: 12h and 4min
The month with the longest days is June (Average daylight: 13h and 12min).
The month with the shortest days is December (Average daylight: 11h and 0min).
- Average sunshine in April: 9h and 1min
The month with the most sunshine is June (Average sunshine: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 6h and 36min).
Average sunshine days in April
San Juan, PR
- Average sunshine days in April: 11 days
The month with the most sunshine days is June (13.7 days).
The month with the least sunshine days is November (9.4 days).
Average UV index in April
San Juan, PR
- Average UV index in April: 7
The months with the highest UV index are April, May, June, July, August, September, October and November (UV index 7).
The months with the lowest UV index are January, February, March and December (UV index 6).
Average cloud cover in April
San Juan, PR
- Average cloud cover in April: 30
The month with the most cloud cover is December (Cloud cover 35).
The month with the least cloud cover is September (Cloud cover 26).
Average visibility in April
San Juan, PR
- Average visibility in April: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
San Juan, Puerto Rico, USA
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