Rio Grande Weather in April

With daytime temperatures of 29°C (84°F) and nighttime lows of 23°C (73°F), April in Rio Grande brings high temperatures during the day. Do keep in mind that quite a bit of rainfall is typical. Around 90 mm (3.5 in) falls on average.

Rainfall in Rio Grande in April

Records from the past 30 years suggest around 14 days of rain, with 90 mm (3.5 in) average for the month. A fairly balanced picture this month, some wet days but nothing too extreme in terms of intensity.

Temperature in Rio Grande in April

April is one of the better months to visit Rio Grande. Expect 29°C (84°F) during the day and 23°C (73°F) at night. This gives the month a fairly typical daily rhythm, with warmer afternoons and more comfortable nights. Nights are warm at 23°C (73°F). It's worth making sure your accommodation has decent ventilation or air conditioning.

Sunshine in Rio Grande in April

The month enjoys around 268 hours of sunshine, creating mostly sunny days with good weather conditions.

Wind Speed in Rio Grande in April

Wind speeds average 3 m/s (6 knots) during April. At this speed, light breezes keep leaves and small twigs in gentle motion while the wind also provides natural cooling. Since this is an average, some days are more tranquil while others have more persistent light winds that are more noticeable.

Average water temperature in April

The water is 27°C (81°F) this month — warm enough that getting in requires no effort at all. Good conditions for swimming, snorkeling, or just floating around.

So this is a great month to visit if you prefer dry days with pleasant temperatures.

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Puerto Rico, check out our Rio Grande's climate page.

Rio Grande Temperature in April

Min Temperature 23°C (73°F)  

Max Temperature 29°C (84°F)  

Water Temperature 27°C (81°F) *  

Chance of Rain 47%  

Precipitation 90 mm (3.5 in)  

Rainy days 14 days  

Humidity 71% *  

Windspeed 3 m/s (6 knots) *  

Sunshine 268 hours *  

Percentage Sunshine 71% *  

* Data from: San Juan, Puerto Rico (18 KM, 11 Miles).

Daily Historical Temperatures

50-year average (1976-2025)

Based on our historical records, temperatures in Rio Grande typically stay consistent throughout April, with daily highs averaging around 29°C (84°F). Nights are warm, with lows around 23°C (73°F).

Average temperatures in April

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Daily Historical Precipitation

50-year average (1976-2025)

Average daily rainfall for each day of the month based on long-term records.

Average precipitation in April

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Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

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Historical weather for Rio Grande in April

Browse day-by-day weather records for Rio Grande spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.

Historical weather Temperatures Precipitation

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Rio Grande historical weather extremes in April

Based on weather observations in Rio Grande between 1976 and 2026, these are the recorded extremes during April.

• Rio Grande recorded its highest April temperature of 34°C (93°F) on April 28, 2010.
• Rio Grande experienced its chilliest April day on April 23, 2007, reaching only 25°C (77°F).
• The coldest night in April in Rio Grande was on April 1, 1976, with a minimum of 19°C (66°F).

What to Wear in Rio Grande in April

Warm weather calls for comfortable, breathable clothing in April. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). High rain levels are expected, so pack waterproof gear and an umbrella or poncho. With water temperatures around 27°C (81°F), swimming conditions are excellent. Pack your swimsuit, goggles, and maybe some water shoes. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.

What To Do in Rio Grande in April

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

9/10

Cycling

7/10

Walking

7/10

Camping

8/10

Outdoor sports

7/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Puerto Rico, check out our Rio Grande's climate page.

More climate data for Rio Grande

Temperature Rainfall Sunshine Humidity Wind Speed Water Temp

See the full Rio Grande climate overview or explore weather in Puerto Rico.