Weather in San Juan for September 2024
Until now, September 2024 in San Juan is slightly cooler than the historical average by -1.1 °C.
The forecast for the next days in San Juan predicts temperatures to be around 31 °C, close to the historical average.
In general, the average temperature in San Juan at the beginning of September is 32 °C. As the month progressed, temperatures tended to moderately fall, reaching an average of 31.1 °C by the end of September.
Expect significant rainfall in San Juan during September, with an average of 18 rainy days.
Is September a good time to visit San Juan? check out the best time to travel to San Juan page.
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San Juan in September average weather
| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  32° | ||||||
| 2  32° | 3 33° | 4 32° | 5  31° | 6 32° | 7  32° | 8 30° |
| 9 30° | 10 31° | 11 31° | 12 33° | 13 32° | 14 33° | 15 33° |
| 16 32° | 17  30° | 18 31° | 19 30° | 20  32° | 21 31° | 22 31° |
| 23 30° | 24 31° | 25 31° | 26 31° | 27 32° | 28 31° | 29 31° |
| 30 31° |
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Temperatures trend during September in San Juan
September weather day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. | Partly cloudy | 32° /25° | 0.9 mm | 8 | |
| 2 Sept. | Patchy rain possible | 32° /25° | 2.5 mm | 7 | |
| 3 Sept. | Patchy rain possible | 33° /25° | 1 mm | 7 | |
| 4 Sept. | Partly cloudy | 32° /25° | 0.5 mm | 8 | |
| 5 Sept. | Cloudy | 31° /25° | 1.1 mm | 7 | |
| 6 Sept. | Partly cloudy | 32° /24° | 0.8 mm | 8 | |
| 7 Sept. | Heavy rain at times | 32° /25° | 9.2 mm | 7 | |
| 8 Sept. | Patchy rain possible | 30° /25° | 3.2 mm | 7 | |
| 9 Sept. | Patchy rain possible | 30° /25° | 11.9 mm | 7 | |
| 10 Sept. | Patchy rain possible | 31° /25° | 2.6 mm | 7 | |
| 11 Sept. | Light rain shower | 31° /24° | 4.5 mm | 7 | |
| 12 Sept. | Partly cloudy | 33° /25° | 1.9 mm | 8 | |
| 13 Sept. | Partly cloudy | 32° /25° | 0.8 mm | 8 | |
| 14 Sept. | Partly cloudy | 33° /25° | 0.4 mm | 8 | |
| 15 Sept. | Partly cloudy | 33° /25° | 0.1 mm | 8 | |
| 16 Sept. | Partly cloudy | 32° /25° | 0 mm | 8 | |
| 17 Sept. | Thundery outbreaks possible | 30° /26° | 0.6 mm | 7 | |
| 18 Sept. | Partly cloudy | 31° /28° | 0 mm | 10 | |
| 19 Sept. | Cloudy | 30° /27° | 0.1 mm | 11 | |
| 20 Sept. | Moderate rain | 32° /27° | 8.4 mm | 11 | |
| 21 Sept. | Patchy rain possible | 31° /26° | 2.8 mm | 1 | |
| 22 Sept. | Patchy rain possible | 31° /26° | 2 mm | 6 | |
| 23 Sept. | Moderate rain | 30° /23° | 10 mm | 6 | |
| 24 Sept. | Patchy rain possible | 31° /26° | 0.2 mm | 6 | |
| 25 Sept. | Partly cloudy | 31° /26° | 0 mm | 7 | |
| 26 Sept. | Patchy rain possible | 31° /26° | 0.2 mm | 6 | |
| 27 Sept. | Patchy rain possible | 32° /27° | 0.4 mm | 6 | |
| 28 Sept. | Patchy rain possible | 31° /27° | 0.5 mm | 6 | |
| 29 Sept. | Patchy rain possible | 31° /26° | 0.7 mm | 6 | |
| 30 Sept. | Patchy rain possible | 31° /26° | 4.4 mm | 6 | |
| Next | |||||
San Juan in September - FAQ
What to pack to San Juan in September?
As you prepare for your trip to San Juan in September, it's important to consider the typical weather patterns for the time of year. Below is a carefully tailored packing list to ensure that your time in San Juan, during September, is comfortable and enjoyable, regardless of the weather conditions.
- Clothing
- Lightweight Clothing: T-shirts, blouses, shorts, skirts
- Rain Gear: Lightweight, waterproof clothing
- Footwear
- Waterproof Shoes
- Sandals/Flip-flops: Comfortable for warm climates
- Accessories
- Sunglasses: For sun protection
- Sun Hats: Wide-brimmed hats for sun protection in warm weather
- Umbrellas/Raincoats: For rainy days
- Personal Items
- Sunscreen: High SPF for sunny destinations
- Lip Balm with SPF: To protect against chapped lips
- Insect Repellent: For destinations with mosquitos or other insects
Quick links
Where is San Juan?Get accurate weather forecasts for San Juan, located at latitude 18.466 and longitude -66.106. Stay updated with localized weather information tailored for San Juan.