San Juan, Puerto Rico Hourly Forecast
San Juan temperature trend - Next 24 hours
The next 24 hours at a glance
- Warmest hour: 1 PM - around 86°
- Coolest hour: 4 AM - around 81°
- Highest rain chance: 10 AM (28%) - pack accordingly
- UV peak: 1 PM at index 10 - sun protection recommended
- Windiest: 12 PM at 16 mph
San Juan hourly weather - Tuesday, September 15
In San Juan, expect a high near 83°F (28°C) around 6 PM and a low of 81°F (27°C) near 11 PM; precipitation risk peaks at 26% around 11 PM.
| Time | Conditions | Temp | Feels | Rain | Wind | Humidity | UV | |
|---|---|---|---|---|---|---|---|---|
| 6 PM | Overcast | 83° | 90° | 20% | 13 mph E | 75% | 0 | |
| 7 PM | Overcast | 82° | 89° | 21% | 13 mph E | 76% | 0 | |
| 8 PM | Overcast | 82° | 88° | 22% | 15 mph E | 78% | 0 | |
| 9 PM | Overcast | 82° | 88° | 22% | 14 mph E | 78% | 0 | |
| 10 PM | Patchy rain nearby | 82° | 88° | 24% | 14 mph E | 80% | 0 | |
| 11 PM | Patchy rain nearby | 81° | 87° | 26% | 15 mph E | 81% | 0 |
San Juan hourly weather - Wednesday, September 16
In San Juan, expect a high near 86°F (30°C) around 1 PM and a low of 81°F (27°C) near 4 AM; precipitation risk peaks at 28% around 10 AM.
| Time | Conditions | Temp | Feels | Rain | Wind | Humidity | UV | |
|---|---|---|---|---|---|---|---|---|
| 12 AM | Patchy rain nearby | 82° | 88° | 19% | 12 mph ESE | 79% | 0 | |
| 1 AM | Patchy rain nearby | 81° | 86° | 21% | 13 mph ESE | 80% | 0 | |
| 2 AM | Overcast | 81° | 86° | 21% | 13 mph E | 80% | 0 | |
| 3 AM | Patchy rain nearby | 81° | 86° | 19% | 13 mph ESE | 78% | 0 | |
| 4 AM | Patchy rain nearby | 81° | 86° | 23% | 13 mph ESE | 78% | 0 | |
| 5 AM | Patchy rain nearby | 81° | 86° | 22% | 12 mph ESE | 77% | 0 | |
| 6 AM | Patchy rain nearby | 81° | 86° | 23% | 10 mph ESE | 79% | 0 | |
| 7 AM | Patchy rain nearby | 82° | 87° | 23% | 12 mph ESE | 78% | 0 | |
| 8 AM | Patchy rain nearby | 83° | 91° | 21% | 14 mph E | 75% | 1 | |
| 9 AM | Patchy rain nearby | 84° | 92° | 19% | 15 mph E | 72% | 3 | |
| 10 AM | Patchy rain nearby | 85° | 94° | 28% | 16 mph E | 72% | 5 | |
| 11 AM | Patchy rain nearby | 85° | 94° | 26% | 16 mph E | 71% | 7 | |
| 12 PM | Overcast | 85° | 94° | 17% | 16 mph E | 71% | 8 | |
| 1 PM | Patchy rain nearby | 86° | 94° | 26% | 16 mph E | 71% | 10 | |
| 2 PM | Patchy rain nearby | 85° | 93° | 27% | 16 mph E | 73% | 8 | |
| 3 PM | Patchy rain nearby | 84° | 93° | 26% | 15 mph E | 73% | 5 | |
| 4 PM | Patchy rain nearby | 84° | 93° | 26% | 13 mph E | 73% | 3 | |
| 5 PM | Thundery outbreaks in nearby | 84° | 92° | 27% | 14 mph E | 74% | 1 | |
| 6 PM | Patchy rain nearby | 83° | 91° | 25% | 14 mph E | 77% | 0 | |
| 7 PM | Overcast | 83° | 90° | 23% | 14 mph E | 79% | 0 | |
| 8 PM | Cloudy | 82° | 90° | 20% | 14 mph E | 80% | 0 | |
| 9 PM | Overcast | 82° | 89° | 24% | 14 mph ESE | 81% | 0 | |
| 10 PM | Overcast | 82° | 89° | 24% | 13 mph ESE | 82% | 0 | |
| 11 PM | Patchy rain nearby | 82° | 90° | 25% | 13 mph ESE | 82% | 0 |
San Juan hourly weather - Thursday, September 17
In San Juan, expect a high near 87°F (31°C) around 3 PM and a low of 81°F (27°C) near 4 AM; precipitation risk peaks at 71% around 10 AM.
| Time | Conditions | Temp | Feels | Rain | Wind | Humidity | UV | |
|---|---|---|---|---|---|---|---|---|
| 12 AM | Patchy rain nearby | 82° | 89° | 24% | 13 mph ESE | 83% | 0 | |
| 1 AM | Patchy rain nearby | 81° | 88° | 26% | 12 mph ESE | 84% | 0 | |
| 2 AM | Overcast | 82° | 88° | 25% | 12 mph ESE | 83% | 0 | |
| 3 AM | Patchy rain nearby | 81° | 87° | 27% | 12 mph SE | 83% | 0 | |
| 4 AM | Overcast | 81° | 87° | 25% | 10 mph SE | 82% | 0 | |
| 5 AM | Patchy rain nearby | 81° | 87° | 31% | 9 mph SE | 82% | 0 | |
| 6 AM | Patchy rain nearby | 82° | 88° | 28% | 10 mph ESE | 81% | 0 | |
| 7 AM | Overcast | 82° | 88° | 24% | 10 mph SE | 81% | 0 | |
| 8 AM | Patchy rain nearby | 83° | 90° | 29% | 12 mph ESE | 79% | 1 | |
| 9 AM | Light rain shower | 84° | 92° | 49% | 12 mph ESE | 74% | 3 | |
| 10 AM | Light rain shower | 85° | 93° | 71% | 13 mph ESE | 72% | 6 | |
| 11 AM | Light rain shower | 86° | 94° | 62% | 14 mph ESE | 70% | 9 | |
| 12 PM | Light rain shower | 86° | 94° | 62% | 14 mph ESE | 70% | 10 | |
| 1 PM | Light rain shower | 85° | 94° | 58% | 14 mph ESE | 73% | 6 | |
| 2 PM | Overcast | 87° | 96° | 15% | 13 mph ESE | 68% | 6 | |
| 3 PM | Overcast | 87° | 96° | 16% | 15 mph ESE | 67% | 5 | |
| 4 PM | Patchy rain nearby | 86° | 96° | 18% | 15 mph ESE | 70% | 2 | |
| 5 PM | Overcast | 85° | 95° | 19% | 15 mph ESE | 74% | 1 | |
| 6 PM | Patchy rain nearby | 84° | 94° | 24% | 14 mph ESE | 78% | 0 | |
| 7 PM | Patchy rain nearby | 83° | 91° | 30% | 14 mph ESE | 81% | 0 | |
| 8 PM | Patchy rain nearby | 82° | 90° | 26% | 14 mph ESE | 83% | 0 | |
| 9 PM | Cloudy | 82° | 90° | 19% | 13 mph ESE | 83% | 0 | |
| 10 PM | Patchy rain nearby | 82° | 90° | 28% | 11 mph ESE | 83% | 0 | |
| 11 PM | Patchy rain nearby | 82° | 88° | 32% | 11 mph SE | 83% | 0 |
Quick answers for the hours ahead
What is the warmest hour in San Juan today?
Will it rain in San Juan tonight?
When is the UV index highest in San Juan today?
San Juan hour-by-hour: what to expect
Over the next 24 hours in San Juan, temperatures range from 81°F (27°C) around 4 AM up to 86°F (30°C) near 1 PM - right in line with the typical September high of 88°F (31°C).
A stray shower can't be ruled out - Rain chances top out at 28% around 10 AM. Wind picks up to 16 mph (26 km/h) from the E near 12 PM. UV reaches 10 (1 PM) - sun protection recommended through midday.
The “feels like” column blends humidity and wind into an apparent temperature - see how it works in our feels-like temperature guide. Planning further ahead? Check the San Juan 14-day forecast or the monthly climate averages.