San Juan
August
Weather in San Juan for August 2026
Your guide to San Juan weather in August - trends and predictions
Heat Advisory - See hour by hour.
Until now, August 2026 in San Juan has been nearly identical to the historical average, with a temperature of 31.1 °C (showing only a slight deviation of 0.1 °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 August is 31.3 °C. As the month progressed, temperatures tended to slightly increase, reaching an average of 31.4 °C by the end of August.
San Juan in August brings notable rainfall, with an average of 16 rainy days and a total precipitation of 118.1 mm.
Official Weather Alert ⚠️
Temperatures
Rain 🌧️
15
Dry days
16
Rainy days
0
Snow days
31°/26°
Temperatures
24 km/h
Avg max wind
78 %
Avg humidity
San Juan Weather August
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Temperatures trend during August in San Juan
See the weather trend as well as the moving average line
August weather in San Juan day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Aug. |  Moderate or heavy rain shower | 32° /25° | 5.9 mm | 7 | |
| 2 Aug. | Moderate or heavy rain shower | 31° /25° | 6.9 mm | 7 | |
| 3 Aug. |  Patchy rain possible | 32° /25° | 2.9 mm | 9 | |
| 4 Aug. | Patchy rain possible | 31° /25° | 1.9 mm | 7 | |
| 5 Aug. |  Cloudy | 31° /25° | 1.5 mm | 7 | |
| 6 Aug. | Moderate or heavy rain shower | 31° /25° | 3.3 mm | 9 | |
| 7 Aug. | Patchy rain possible | 31° /25° | 3.3 mm | 7 | |
| 8 Aug. | Moderate or heavy rain shower | 31° /25° | 4.5 mm | 8 | |
| 9 Aug. | Moderate or heavy rain shower | 31° /25° | 3.6 mm | 7 | |
| 10 Aug. | Moderate or heavy rain shower | 31° /25° | 5.6 mm | 7 | |
| 11 Aug. |  Overcast | 31° /25° | 5.3 mm | 6 | |
| 12 Aug. | Patchy rain possible | 30° /26° | 4.4 mm | 12 | |
| 13 Aug. | Patchy rain possible | 31° /27° | 0.4 mm | 10.6 | |
| 14 Aug. | Patchy rain possible | 31° /27° | 0.5 mm | 11.2 | |
| 15 Aug. | Patchy rain possible | 31° /26° | 1.7 mm | 11.7 | |
| 16 Aug. | Patchy rain possible | 30° /27° | 4.6 mm | 7 | |
| 17 Aug. | Patchy rain possible | 29° /26° | 6.2 mm | 6 | |
| 18 Aug. |  Sunny | 31° /26° | 1.7 mm | 8 | |
| 19 Aug. | Patchy rain possible | 31° /25° | 0.1 mm | 8 | |
| 20 Aug. | Patchy rain possible | 30° /26° | 1.6 mm | 7 | |
| 21 Aug. | Patchy rain possible | 30° /26° | 0.2 mm | 8 | |
| 22 Aug. | Patchy rain possible | 31° /25° | 0.5 mm | 8 | |
| 23 Aug. | Patchy rain possible | 31° /26° | 1.9 mm | 7 | |
| 24 Aug. | Patchy rain possible | 31° /26° | 0.8 mm | 8 | |
| 25 Aug. | Patchy rain possible | 31° /26° | 0.5 mm | 8 | |
| 26 Aug. | Light rain shower | 31° /25° | 1.4 mm | 7 | |
| 27 Aug. |  Thundery outbreaks possible | 32° /25° | 0.1 mm | 7 | |
| 28 Aug. | Overcast | 32° /25° | 2.3 mm | 7 | |
| 29 Aug. | Cloudy | 31° /26° | 0.3 mm | 7 | |
| 30 Aug. | Thundery outbreaks possible | 32° /26° | 0.5 mm | 7 | |
| 31 Aug. | Overcast | 31° /25° | 0.3 mm | 7 | |
| Next | |||||
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.
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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 31° and lows near 26°, suitable for diverse activities and preferences.
How much rainfall should be expected in San Juan during August?
Significant rainfall exceeding 118.1 mm is expected in San Juan during August, occurring over more than 16 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 24 km/h, suggesting breezy to windy conditions, depending on your activities.
August rainfall patterns in San Juan
Explore the daily rainfall trends and prepare for San Juans August weather 💧
Typically, San Juan has 16 rainy days in August with a total of 118.1 mm of rainfall.
UV exposure in San Juan during August
Stay informed about UV levels for safe outdoor activities throughout the month of August ☀️
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