San Juan, Weather & Growing Conditions
Today
89°F
Scattered Rain Showers
Scattered rain showers. Partly sunny. High near 89, with temperatures falling to around 85 in the afternoon. East wind 9 to 15 mph. Chance of precipitation is 40%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 89°F | Scattered Rain Showers | 9 to 15 mph E | 40% |
| Tonight | 77°F | Scattered Rain Showers | 5 to 10 mph E | 40% |
| Wednesday | 91°F | Scattered Rain Showers | 6 to 15 mph ESE | 40% |
| Wednesday Night | 77°F | Isolated Rain Showers | 7 to 12 mph ESE | 20% |
| Thursday | 90°F | Mostly Sunny then Scattered Rain Showers | 7 to 14 mph ESE | 30% |
| Thursday Night | 77°F | Isolated Rain Showers | 5 to 10 mph E | 10% |
| Friday | 89°F | Isolated Rain Showers | 6 to 14 mph E | 20% |
| Friday Night | 77°F | Scattered Rain Showers | 6 to 10 mph E | 30% |
| Saturday | 91°F | Isolated Rain Showers then Sunny | 6 to 14 mph E | 8% |
| Saturday Night | 78°F | Isolated Rain Showers | 6 to 10 mph E | 10% |
| Sunday | 93°F | Scattered Rain Showers | 8 to 16 mph E | 30% |
| Sunday Night | 78°F | Clear | 6 to 10 mph E | 0% |
| Monday | 91°F | Isolated Rain Showers then Sunny | 7 to 16 mph E | 10% |
| Monday Night | 78°F | Isolated Rain Showers | 6 to 10 mph E | 8% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for San Juan,
Growing season
365 days
Explore more for San Juan, : full frost dates · planting calendar
Climate data from the nearest NOAA station, Trujillo Alto 2 Ssw, Pr Rq (2.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.