San Juan
Tomorrow
Tomorrow weather in San Juan
Wednesday, 17th September 2025
29°
Heavy rain
Official weather alert: Hydrologic Outlook.The weather tomorrow in San Juan will be colder than today, with max temperatures of 28°.
The rain is expected to get stronger, the expected precipitation are 43 mm.
The wind tomorrow will get lighter comparing to today but still be strong and reach over 22 km/h.
The humidity in San Juan will continue to be high and expected to go over 85%.
29° / 27°
Temp
86%
Rain
22 km/h
Wind
85%
Humidity
San Juan Weather Pages
San Juan hourly forecast for tomorrow
Scroll right to see more weather forecasts for San Juan tomorrow
| 00:00 | 01:00 | 02:00 | 03:00 | 04:00 | 05:00 | 06:00 | 06:12 | 07:00 | 08:00 | 09:00 | 10:00 | 11:00 | 12:00 | 13:00 | 14:00 | 15:00 | 16:00 | 17:00 | 18:00 | 18:24 | 19:00 | 20:00 | 21:00 | 22:00 | 23:00 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| weather |  | |  |  |  | |  |  |  |  |  | | | | | | | | | |  |  | | | |  | Next |
| temperatures | 27.9° | 27.5° | 27.4° | 27.6° | 27.6° | 27.6° | 27.7° | Sunrise | 27.8° | 27.9° | 27.8° | 27.9° | 28.2° | 27.9° | 27.7° | 27.6° | 27.6° | 27.6° | 27.4° | 27.3° | Sunset | 27.1° | 27.2° | 27.4° | 27.1° | 27.3° | |
| feels like | 33.2° | 32.6° | 32.5° | 32.7° | 32.7° | 32.4° | 32.1° | 32.1° | 32° | 31.8° | 31.9° | 32.7° | 33° | 33.3° | 33° | 32.6° | 32.3° | 31.8° | 31.5° | 31.2° | 31.3° | 31.5° | 30.7° | 31° | |||
| wind speed | 19 km/h | 19 km/h | 18 km/h | 16 km/h | 15 km/h | 13 km/h | 10 km/h | 8 km/h | 7 km/h | 8 km/h | 8 km/h | 11 km/h | 17 km/h | 19 km/h | 21 km/h | 22 km/h | 20 km/h | 18 km/h | 18 km/h | 18 km/h | 16 km/h | 15 km/h | 14 km/h | 12 km/h | |||
| wind degree | 72° | 73° | 83° | 87° | 95° | 100° | 103° | 114° | 116° | 114° | 105° | 84° | 84° | 92° | 96° | 96° | 98° | 104° | 104° | 106° | 110° | 114° | 122° | 118° | |||
| wind direction | ENE | ENE | E | E | E | E | ESE | ESE | ESE | ESE | ESE | E | E | E | E | E | E | ESE | ESE | ESE | ESE | ESE | ESE | ESE | |||
| Precipitation | 0 mm | 0 mm | 6.1 mm | 0 mm | 0 mm | 0 mm | 0 mm | 0 mm | 3 mm | 0 mm | 0 mm | 5.3 mm | 0 mm | 0 mm | 7.7 mm | 6.4 mm | 5.8 mm | 5.1 mm | 2.6 mm | 1.3 mm | 0 mm | 0 mm | 0 mm | 0.3 mm | |||
| chance for rain | 0% | 0% | 100% | 0% | 0% | 0% | 0% | 0% | 100% | 0% | 0% | 100% | 0% | 0% | 100% | 100% | 100% | 100% | 100% | 100% | 0% | 0% | 0% | 100% | |||
| chance for snow | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | |||
| humidity | 87% | 90% | 91% | 89% | 88% | 86% | 84% | 82% | 78% | 78% | 79% | 79% | 81% | 91% | 94% | 88% | 86% | 83% | 84% | 84% | 85% | 83% | 83% | 79% | |||
| dew point | 25.6° | 25.7° | 25.5° | 25.4° | 25.5° | 25.2° | 24.7° | 24.3° | 23.9° | 23.7° | 23.8° | 24° | 24.9° | 26.1° | 26.4° | 25.4° | 24.9° | 24.4° | 24.3° | 24.2° | 24.2° | 24.3° | 24.3° | 22.9° | |||
| visibility | 10 km | 10 km | 10 km | 10 km | 10 km | 10 km | 10 km | 10 km | 9 km | 10 km | 10 km | 10 km | 10 km | 9 km | 5 km | 10 km | 10 km | 10 km | 10 km | 10 km | 10 km | 10 km | 9 km | 9 km | |||
| cloud cover | 47% | 48% | 98% | 94% | 63% | 33% | 32% | 44% | 72% | 96% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 100% | 99% | 99% | 63% | 46% | 84% | |||
| UV | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0.2 | 1.3 | 3.7 | 6.8 | 9.6 | 10.8 | 10.3 | 9 | 6.1 | 3 | 1 | 0.1 | 0 | 0 | 0 | 0 | 0 |
Weather in San Juan tomorrow
The temperature tomorrow in San Juan is expected to be typical for this time of year, with a forecast of 29 °C, closely aligning with the historical average for 17th of September.
temperatures
29 °C
rain
43.6 mm
wind
22 km/h
UV
Low
San Juan daylight overview ☀️
Tomorrow in San Juan, The sun rises at 06:12 and sets at 18:24, giving a total daylight duration of 12 hours and 12 minutes.
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What to wear tomorrow in San Juan? clothing recommendations
Stay comfortably stylish - your tailored guide for tomorrow's San Juan forecast.
Short-sleeve shirt
Shorts
Lightweight pants
Sunglasses
Wide brimmed hat
Sunscreen
Umbrella
The weather tomorrow in San Juan - FAQ
What is the maximum temperature for tomorrow in San Juan?
The maximum temperature for tomorrow in San Juan is expected to be 29° degrees. Please dress accordingly to stay comfortable throughout the day.
Will it rain tomorrow in San Juan? 🌧️
Yes, there is a 86% chance of rain in San Juan tomorrow. We recommend carrying an umbrella or rain gear to stay dry.
What will be the wind speed tomorrow in San Juan? 🌀
The wind in San Juan is expected to blow at 22 km/h. This could affect outdoor activities, so plan accordingly.
How should I dress for the weather in San Juan tomorrow?
Given the forecast of 29 °C with a 86% chance of rain, we advise checking our "What to wear tomorrow" section for recommendations. There, you will find tailored advice to help you stay comfortable and prepared for the weather conditions in San Juan tomorrow.
What is the sunrise and sunset time for San Juan tomorrow?
The sun is expected to rise at 06:12 and set at 18:24 in San Juan.
How accurate is the weather forecast San Juan tomorrow? ✅
San Juan weather forecast for tomorrow is based on the most current and sophisticated meteorological models available. While we strive for accuracy, weather conditions can change unexpectedly, so we recommend checking for updates regularly.
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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.
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