San Juan
August
Weather in San Juan for August 2025
Your guide to San Juan weather in August - trends and predictions
In general, the average temperature in San Juan at the beginning of August is 31.4 °C. As the month progressed, temperatures tended to slightly increase, reaching an average of 31.7 °C by the end of August.
San Juan experiences an exceptionally high level of rainfall in August, with more than 20 rainy days on average.
Is August a good time to visit San Juan? check out the best time to travel to San Juan page.
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8
Dry days
23
Rainy days
0
Snow days
32°/25°
Temperatures
23 km/h
Avg max wind
77 %
Avg humidity
San Juan in August average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  33° | 2 31° | 3  32° | ||||
| 4  31° | 5  31° | 6 31° | 7 31° | 8 32° | 9 32° | 10 30° |
| 11  32° | 12 31° | 13 31° | 14 29° | 15 31° | 16 31° | 17 31° |
| 18 32° | 19 31° | 20 30° | 21 30° | 22 30° | 23 31° | 24 32° |
| 25 31° | 26 32° | 27  32° | 28 32° | 29 32° | 30 32° | 31 31° |
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Temperatures trend during August in San Juan
See the weather trend as well as the moving average line
August weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Aug. | Moderate or heavy rain shower | 33° /25° | 7.1 mm | 7 | |
| 2 Aug. | Moderate or heavy rain shower | 31° /25° | 7.8 mm | 7 | |
| 3 Aug. | Heavy rain at times | 32° /25° | 1.5 mm | 7 | |
| 4 Aug. | Patchy rain possible | 31° /25° | 1.3 mm | 7 | |
| 5 Aug. | Cloudy | 31° /25° | 0.8 mm | 7 | |
| 6 Aug. | Moderate or heavy rain shower | 31° /25° | 3.3 mm | 7 | |
| 7 Aug. | Moderate or heavy rain shower | 31° /25° | 5.8 mm | 7 | |
| 8 Aug. | Moderate or heavy rain shower | 32° /25° | 7.5 mm | 7 | |
| 9 Aug. | Moderate or heavy rain shower | 32° /25° | 4.7 mm | 7 | |
| 10 Aug. | Moderate or heavy rain shower | 30° /25° | 9.9 mm | 7 | |
| 11 Aug. | Overcast | 32° /24° | 0.1 mm | 7 | |
| 12 Aug. | Moderate rain at times | 31° /25° | 1.4 mm | 7 | |
| 13 Aug. | Patchy rain possible | 31° /25° | 3.6 mm | 7 | |
| 14 Aug. | Patchy rain possible | 29° /25° | 12.9 mm | 7 | |
| 15 Aug. | Patchy rain possible | 31° /26° | 0.3 mm | 7 | |
| 16 Aug. | Patchy rain possible | 31° /25° | 1.2 mm | 7 | |
| 17 Aug. | Moderate or heavy rain shower | 31° /25° | 3.9 mm | 7 | |
| 18 Aug. | Patchy rain possible | 32° /26° | 1.4 mm | 7 | |
| 19 Aug. | Patchy rain possible | 31° /25° | 1.4 mm | 7 | |
| 20 Aug. | Patchy rain possible | 30° /25° | 2.9 mm | 7 | |
| 21 Aug. | Moderate or heavy rain shower | 30° /25° | 6.5 mm | 7 | |
| 22 Aug. | Moderate or heavy rain shower | 30° /24° | 8.6 mm | 7 | |
| 23 Aug. | Patchy rain possible | 31° /25° | 1.7 mm | 7 | |
| 24 Aug. | Moderate rain at times | 32° /25° | 1.9 mm | 7 | |
| 25 Aug. | Moderate or heavy rain shower | 31° /25° | 5.2 mm | 7 | |
| 26 Aug. | Light rain shower | 32° /24° | 2.2 mm | 7 | |
| 27 Aug. | Thundery outbreaks possible | 32° /25° | 0.1 mm | 8 | |
| 28 Aug. | Overcast | 32° /25° | 1.1 mm | 7 | |
| 29 Aug. | Cloudy | 32° /26° | 0.4 mm | 7 | |
| 30 Aug. | Thundery outbreaks possible | 32° /26° | 0.8 mm | 7 | |
| 31 Aug. | Overcast | 31° /25° | 0.4 mm | 7 | |
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Important Notice
Our weather forecast for San Juan in August is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the San Juan forecast closer to your planned date for the most up-to-date weather information.
San Juan in August - FAQ
What are the expected maximum and minimum temperatures in San Juan during August?
During August, expect a variety of temperatures with highs around 32° and lows near 25°, suitable for diverse activities and preferences.
How much rainfall should be expected in San Juan during August?
Significant rainfall exceeding 127.9 mm is expected in San Juan during August, occurring over more than 23 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in San Juan during August?
The average wind speed in San Juan during August is 23 km/h, suggesting breezy to windy conditions, depending on your activities.
What to pack to San Juan in August?
As you prepare for your trip to San Juan in August, 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 August, 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
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