San Juan weather in September (North Puerto Rico, Puerto Rico)

This month is known as a warm month. The average maximum daytime temperature in San Juan in September lies at 31.9°C (89.42°F). On average, it is the month with the highest temperatures of the year. The average minimum temperature is 25.3°C (77.54°F) (usually the minimum temperature is noted at night).

The amount of rain during this month is high with an average of 167mm (6.6in). It rains an average of 18 days of the month. If you enjoy blue skies and sunshine, then this is a great time to go to San Juan with 236 hours of sun.

So what to wear in September? Visitors traveling to San Juan should plan on bringing a totally waterproof coat since it will often be raining. However, also bring your summer cloths because it can be very warm or even hot. With a water temperature of around 29.0°C (84.2°F), this is a great month to swim so bring your swimwear.

No idea where to travel to this year? We now have a tool which suggests which destination suits your ideal climate conditions. Find out where to go with our weather planner.

For other monthly average weather and what to do in September look at the numbers below.

Monthly Averages in September

Show in Fahrenheit

Min Temperature 25 °C

Max Temperature 31 °C

Water Temperature 29 °C

Chance of Rain 60%

Precipitation 167mm

Rainy Days 18

Sunshine Hours 236

 

Where to stay in San Juan

Where to go in Puerto Rico in September

Find out more about the weather in Puerto Rico in September and which places have the best weather conditions in this month.

Weather conditions Weather

Temperatures

Precipitation

Legend perfect weather pleasant tolerable unpleasant poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20-29ºC / 68-84ºF and not too much precipitation (less than 90mm / 3.5inch a month).

What To Do

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

Swimming

8/10

Cycling

7/10

Walking

7/10

Camping

7/10

Outdoor sports

7/10

Weather Forecasts for San Juan (North Puerto Rico)

Show in Fahrenheit

SAT   Jan 28

27°C | 21°C

NE 24 kmph

7.6 mm

Moderate rain

Hourly Overview

SUN   Jan 29

27°C | 21°C

ENE 27 kmph

3.8 mm

Patchy rain possible

Hourly Overview

MON   Jan 30

28°C | 22°C

ENE 23 kmph

6.3 mm

Moderate rain

Hourly Overview

5-Day Forecast 10-Day Forecast

Interested in more climate information?

Weather and Climate provides you with all the information you need about the climate in San Juan.

Our site offers climate and forecast data for almost all countries in the world. Are you going to Puerto Rico? On this website you can find historical weather averages for many cities in Puerto Rico. Not sure yet where to go? We now have a tool which suggests which destination suits your ideal climate conditions. Find out where to go with our weather planner.