Isla Grande Airport (SIG) 15 Day Weather Forecast, San Juan Puerto Rico
Current weather conditions and 15 day weather forecast for Isla Grande Airport in San Juan, Puerto Rico including weather daily high/low temperature, warnings, chance of precipitation, pressure, humidity/wind chill, rain, wind speed, cloud, pressure, and UV index.
Current weather conditions at SIG
| 03 October 2026 Sat 29.1 ° C ( 84.4°F )  Sunny |
Feels Like : 32.8 ° C / 91°F Humidity : % 69 Pressure : 1014 mb Wind Speed : 22.3 kmph / 13.9 miles from E 
Visibility : 10 km Precipitation (rainfall) : 0 mm Cloud (%) : 7 |
15-day weather forecast for Isla Grande Airport, San Juan, Puerto Rico
| Date | Weather forecast | Low temperature | High temperature | Average Temperature | Humidity | Wind | Chance of rain |
|---|---|---|---|---|---|---|---|
| 03 October 2026 Sat |  Patchy rain nearby |
26.9 ° C | 30.2 ° C | 28.3 ° C | % 73 | 24.8 km/h | 40% |
| 04 October 2026 Sun | Patchy rain nearby |
26.3 ° C | 30.4 ° C | 28 ° C | % 74 | 27.7 km/h | 73% |
| 05 October 2026 Mon | Patchy rain nearby |
26.3 ° C | 30.4 ° C | 28 ° C | % 76 | 26.3 km/h | 62% |
| 06 October 2026 Tue | Patchy rain nearby |
26.2 ° C | 30.1 ° C | 27.9 ° C | % 75 | 25.2 km/h | 37% |
| 07 October 2026 Wed | Patchy rain nearby |
26.4 ° C | 29.9 ° C | 28 ° C | % 74 | 24.8 km/h | 64% |
| 08 October 2026 Thu |  Overcast |
26.1 ° C | 29.7 ° C | 27.7 ° C | % 76 | 25.2 km/h | 78% |
| 09 October 2026 Fri | Sunny |
26.5 ° C | 29.7 ° C | 28.1 ° C | % 73 | 26.6 km/h | 17% |
| 10 October 2026 Sat | Sunny |
27 ° C | 29.8 ° C | 28.2 ° C | % 71 | 26.3 km/h | 11% |
| 11 October 2026 Sun | Patchy rain nearby |
26.7 ° C | 29.9 ° C | 28 ° C | % 72 | 26.6 km/h | 57% |
| 12 October 2026 Mon | Patchy rain nearby |
25.9 ° C | 29.7 ° C | 27.7 ° C | % 74 | 24.5 km/h | 57% |
| 13 October 2026 Tue | Patchy rain nearby |
25.8 ° C | 30.1 ° C | 27.9 ° C | % 75 | 27.7 km/h | 68% |
| 14 October 2026 Wed | Sunny |
25.6 ° C | 30.5 ° C | 27.8 ° C | % 74 | 25.2 km/h | 62% |
| 15 October 2026 Thu | Sunny |
25.4 ° C | 30 ° C | 27.4 ° C | % 74 | 24.8 km/h | 64% |
| 16 October 2026 Fri | Patchy rain nearby |
25.2 ° C | 28.4 ° C | 26.6 ° C | % 76 | 12.6 km/h | 72% |
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