San Juan Weather in October
Thinking of visiting San Juan in October? Expect very high temperatures reaching 31°C (88°F) during the day, dropping to 25°C (77°F) at night, and note that quite a bit of rainfall is likely.
Rainfall in San Juan in October
Typically, you can expect about 18 days of rain this month, with 146 mm (5.7 in) on average. Expect frequent rainfall this month, and not just light drizzle. When it rains, it tends to come down hard.
Temperature in San Juan in October
Temperatures in San Juan in October top out at 31°C (88°F) and drop to 25°C (77°F) overnight. If you're spending a lot of time outdoors, it helps to plan around the warmer part of the day. With lows around 25°C (77°F), the nights are warm enough that a sheet is usually all you need for bedding.
Sunshine in San Juan in October
Expect sunny days throughout the month, with an estimated 228 hours of sunshine. This makes it a pleasant time to visit San Juan.
Wind Speed in San Juan in October
Average wind conditions reach 2 m/s (4 knots) in October. This creates comfortable weather with light winds that gently move vegetation. Keep in mind this is an average. Daily conditions range from near-calm to more noticeable wind.
Average water temperature in October
At 28°C (82°F), the water is warm and comfortable for swimming. Most people find this temperature ideal for spending longer periods in the water.October in San Juan can still be great, but if you prefer pleasant temperatures along with dry and sunny conditions, our weather planner can help you explore other options in the world.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Puerto Rico, check out our San Juan's climate page.
San Juan Temperature in October
Min Temperature
25°C (77°F)
Max Temperature
31°C (88°F)
Water Temperature
28°C (82°F)
Chance of Rain
60%
Precipitation
146 mm (5.7 in)
Rainy days
18 days
Humidity
77%
Windspeed
2 m/s (4 knots)
Sunshine
228 hours
Percentage Sunshine
63%
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in San Juan typically stay consistent throughout October, with daily highs averaging around 31°C (88°F). Nights are warm, with lows around 25°C (77°F).
Average temperatures in October
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 October
Historical weather for San Juan in October
Browse day-by-day weather records for San Juan spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
San Juan historical weather extremes in October
According to our 49 years of weather records for San Juan, the following extremes were recorded between 1976 and 2025.
- On October 14, 1980, temperatures climbed to 36°C (97°F), marking the warmest October day on record.
- The coldest October day was on October 6, 1985, with a maximum of 24°C (75°F).
- The coldest night in October in San Juan was on October 30, 2001, with a minimum of 21°C (70°F).
Best Places in Puerto Rico in October
Find out more about the weather in Puerto Rico and which places have the best travel conditions in this month. See all of Puerto Rico in October →
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What to Wear in San Juan in October
Warm temperatures in October 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. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.What To Do in San Juan in October
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Puerto Rico, check out our San Juan's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed Water Temp
See the full San Juan climate overview or explore weather in Puerto Rico.
