April weather forecastPort Isabel, TX
April
Weather in April
April is a moderately hot spring month in Port Isabel, Texas, with an average temperature fluctuating between 71.2°F (21.8°C) and 77.7°F (25.4°C).Temperature
Entering April, the average high-temperature is recorded at a warm 77.7°F (25.4°C), exhibiting a minimal shift from March's 73°F (22.8°C). April registers an average low temperature of 71.2°F (21.8°C), subtly lower than the daytime maximum.Humidity
In April, the average relative humidity is 79%.Rainfall
The month with the least rainfall is April, when the rain falls for 8.8 days and typically collects 0.51" (13mm) of precipitation.Ocean temperature
In Port Isabel, the average seawater temperature in April is 73.9°F (23.3°C).Note: Your comfort in 73.9°F (23.3°C) waters hinges on your relationship with the cold, today's sunny disposition, wind patterns, and the air's temperature. For context, Olympic swimmers are no strangers to waters of 77°F (25°C) to 82.4°F (28°C).
Daylight
The average length of the day in April is 12h and 47min.On the first day of April, sunrise is at 7:18 am and sunset at 7:45 pm. On the last day of the month, sunrise is at 6:51 am and sunset at 8:00 pm CDT.
Sunshine
The average sunshine in April in Port Isabel is 8.9h.UV index
April through September, with an average maximum UV index of 7, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for average individuals.Note: In April, the maximum UV index of 7 suggests these recommendations:
Act on precautions and pay attention to sun safety recommendations. Avoidance of sunburn is obligatory. Between 10 a.m. and 4 p.m., the Sun's UV radiation is at its peak. Limit your exposure to direct sunlight during these hours. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Caution! Sand and water reflections can notably increase the UV radiation intensity.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in April
Port Isabel, TX
- Average high temperature in April: 77.7°F
The warmest month (with the highest average high temperature) is August (88°F).
The month with the lowest average high temperature is January (67.1°F).
- Average low temperature in April: 71.2°F
The month with the highest average low temperature is August (82°F).
The coldest month (with the lowest average low temperature) is January (59.5°F).
Average pressure in April
Port Isabel, TX
- Average pressure in April: 29.9"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The months with the lowest atmospheric pressure are May and June (29.88"Hg).
Average wind speed in April
Port Isabel, TX
- Average wind speed in April: 14.2mph
The windiest month (with the highest average wind speed) is April (14.2mph).
The calmest month (with the lowest average wind speed) is September (10.9mph).
Average humidity in April
Port Isabel, TX
- Average humidity in April: 79%
The month with the highest relative humidity is May (80%).
The month with the lowest relative humidity is October (72%).
Average rainfall in April
Port Isabel, TX
- Average rainfall in April: 0.51"
The wettest month (with the highest rainfall) is September (4.13").
The driest month (with the least rainfall) is April (0.51").
Average rainfall days in April
Port Isabel, TX
- Average rainfall days in April: 8.8 days
The month with the highest number of rainy days is September (19.8 days).
The month with the least rainy days is March (8.2 days).
Average sea temperature in April
Port Isabel, TX
- Average sea temperature in April: 73.9°F
The best month for swimming (with the highest average sea temperature) is August (85.1°F).
The coldest month (with the lowest average sea temperature) is February (66.7°F).
Average daylight in April /
Average sunshine in April
Port Isabel, TX
- Average daylight in April: 12h and 48min
The month with the longest days is June (Average daylight: 13h and 42min).
The month with the shortest days is December (Average daylight: 10h and 30min).
- Average sunshine in April: 8h and 54min
The month with the most sunshine is July (Average sunshine: 11h and 18min).
The month with the least sunshine is December (Average sunshine: 4h and 48min).
Average sunshine days in April
Port Isabel, TX
- Average sunshine days in April: 19.3 days
The month with the most sunshine days is March (20.7 days).
The month with the least sunshine days is September (7.2 days).
Average UV index in April
Port Isabel, TX
- Average UV index in April: 7
The months with the highest UV index are April, May, June, July, August and September (UV index 7).
The months with the lowest UV index are January, February and December (UV index 5).
Average cloud cover in April
Port Isabel, TX
- Average cloud cover in April: 34
The month with the most cloud cover is December (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 20).
Average visibility in April
Port Isabel, TX
- 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).
