Rio Grande Weather in July

July in Rio Grande brings very high temperatures around 30°C (86°F) during the day, dropping to 25°C (77°F) at night, with quite a bit of rainfall expected, averaging around 122 mm (4.8 in) for the month.

Rainfall in Rio Grande in July

Historically, approximately 19 days this month are expected to have rain, averaging 122 mm (4.8 in). Expect frequent rainfall this month, and not just light drizzle. When it rains, it tends to come down hard.

Temperature in Rio Grande in July

Daytime highs in Rio Grande in July reach 30°C (86°F), with nights around 25°C (77°F). The hottest part of the day is usually in the afternoon, so lighter clothing can help you stay comfortable. With lows around 25°C (77°F), the nights are warm enough that a sheet is usually all you need for bedding.

Sunshine in Rio Grande in July

Expect sunny days throughout the month, with an estimated 281 hours of sunshine. This makes it a pleasant time to visit Rio Grande.

Wind Speed in Rio Grande in July

In July, average wind speeds reach 4 m/s (8 knots), leading to light to moderate breezes. Conditions vary from day to day, with both calm and windier periods.

Average water temperature in July

The water is 28°C (82°F) this month — warm enough that getting in requires no effort at all. Good conditions for swimming, snorkeling, or just floating around.

If you're looking for dry conditions and comfortable temperatures, July may not be the ideal month to visit Rio Grande. Our weather planner can help you explore destinations with more pleasant weather conditions.

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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 July

Min Temperature 25°C (77°F)  

Max Temperature 30°C (86°F)  

Water Temperature 28°C (82°F) *  

Chance of Rain 63%  

Precipitation 122 mm (4.8 in)  

Rainy days 19 days  

Humidity 76% *  

Windspeed 4 m/s (8 knots) *  

Sunshine 281 hours *  

Percentage Sunshine 68% *  

* 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 July, with daily highs averaging around 30°C (86°F). Nights are warm, with lows around 26°C (79°F).

Average temperatures in July

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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 July

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

‹ January February March April May June July August September October November December ›

Historical weather for Rio Grande in July

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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‹ January February March April May June July August September October November December ›

Rio Grande historical weather extremes in July

According to our 49 years of weather records for Rio Grande, the following extremes were recorded between 1976 and 2025.

• The warmest day in July was on July 7, 2010, with a maximum of 34°C (93°F).
• Rio Grande experienced its chilliest July day on July 14, 1996, reaching only 27°C (81°F).
• Nighttime temperatures dropped to 22°C (72°F) on July 13, 2003, marking the coldest July night on record.

What to Wear in Rio Grande in July

Warm temperatures in July make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Prepare for significant rainfall with proper waterproof clothing and shoes. Expect water temperatures of around 28°C (82°F), which is ideal for taking a refreshing dip. Bring swimwear and consider packing a towel for drying off. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.

What To Do in Rio Grande in July

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

Swimming

9/10

Cycling

7/10

Walking

7/10

Camping

7/10

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.