Weather in Puerto Rico on 18 August 2026
Preliminary outlook for 18 August 2026
A preliminary estimate based on the 2020–2025 archive: daytime around +29°C and nighttime around +23°C, average precipitation 0 mm, wind around 4 m/s, humidity around 60%.
This is a climate-based estimate, not a precise long-range forecast. It is replaced by hourly data when the date enters the forecast window.
+27°C
Weather archive — latest year: 2025
Clear/Sunny
Weather archive — latest year: 2025
Nighttime: +25°C
Precipitation: 0 mm
Wind: 4 — 4 m/s
Humidity: 58%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +30°C | Sun hours | 13 h |
| UV index | 7 | Cloud cover (avg.) | 0% |
| Pressure (avg.) | 761 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +28°C | Dew point (avg.) | +18°C |
| Heat index (avg.) | +28°C | Wind chill (avg.) | +27°C |
| Wind gusts (max.) | 8 m/s | Wind direction (avg.) | 181° ↖ (NNW) |
Sunrise
07:34
Duration
13 h 04 min
Sunset
20:38
Moonrise
02:00
Moonset
16:47
Moon phase
Last Quarter
Illumination
29%
+26°C
Weather archive — for 2024 year
Clear/Sunny
Weather archive — for 2024 year
Nighttime: +24°C
Sea temperature: +23°C
Precipitation: 0 mm
Wind: 4 — 4 m/s
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +28°C | Sun hours | 13 h |
| UV index | 7 | Cloud cover (avg.) | 0% |
| Pressure (avg.) | 758 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | +23°C |
| Feels like (avg.) | +28°C | Dew point (avg.) | +18°C |
| Heat index (avg.) | +28°C | Wind chill (avg.) | +26°C |
| Wind gusts (max.) | 7 m/s | Wind direction (avg.) | 176° ↖ (NNW) |
Sunrise
07:35
Duration
13 h 03 min
Sunset
20:38
Moonrise
20:03
Moonset
05:50
Moon phase
Waxing Gibbous
Illumination
93%
+26°C
Weather archive — for 2023 year
Clear/Sunny
Weather archive — for 2023 year
Nighttime: +24°C
Precipitation: 0 mm
Wind: 4 — 6 m/s
Humidity: 59%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +30°C | Sun hours | 13 h |
| UV index | 7 | Cloud cover (avg.) | 5% |
| Pressure (avg.) | 761 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +28°C | Dew point (avg.) | +18°C |
| Heat index (avg.) | +28°C | Wind chill (avg.) | +26°C |
| Wind gusts (max.) | 10 m/s | Wind direction (avg.) | 240° ↖ (NNW) |
Sunrise
07:34
Duration
13 h 04 min
Sunset
20:38
Moonrise
09:31
Moonset
22:13
Moon phase
Waxing Crescent
Illumination
9%
+24°C
Weather archive — for 2022 year
Clear/Sunny
Weather archive — for 2022 year
Nighttime: +21°C
Precipitation: 0 mm
Wind: 4 — 5 m/s
Humidity: 71%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +27°C | Sun hours | 13 h |
| UV index | 6 | Cloud cover (avg.) | 1% |
| Pressure (avg.) | 761 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +25°C | Dew point (avg.) | +18°C |
| Heat index (avg.) | +25°C | Wind chill (avg.) | +23°C |
| Wind gusts (max.) | 9 m/s | Wind direction (avg.) | 57° ↘ (SE) |
Sunrise
07:34
Duration
13 h 04 min
Sunset
20:38
Moonrise
00:24
Moonset
14:02
Moon phase
Last Quarter
Illumination
54%
+27°C
Weather archive — for 2021 year
Clear/Sunny
Weather archive — for 2021 year
Nighttime: +24°C
Precipitation: 0 mm
Wind: 4 — 4 m/s
Humidity: 42%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +31°C | Sun hours | 13 h |
| UV index | 7 | Cloud cover (avg.) | 1% |
| Pressure (avg.) | 761 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +31°C | Dew point (avg.) | +12°C |
| Heat index (avg.) | +31°C | Wind chill (avg.) | +31°C |
| Wind gusts (max.) | 10 m/s | Wind direction (avg.) | 21° ↑ (NNE) |
Sunrise
07:34
Duration
13 h 04 min
Sunset
20:38
Moonrise
17:17
Moonset
02:45
Moon phase
Waxing Gibbous
Illumination
69%
+25°C
Weather archive — for 2020 year
Clear/Sunny
Weather archive — for 2020 year
Nighttime: +22°C
Precipitation: 0 mm
Wind: 4 — 5 m/s
Humidity: 63%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +27°C | Sun hours | 13 h |
| UV index | 6 | Cloud cover (avg.) | 0% |
| Pressure (avg.) | 761 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +26°C | Dew point (avg.) | +17°C |
| Heat index (avg.) | +26°C | Wind chill (avg.) | +24°C |
| Wind gusts (max.) | 11 m/s | Wind direction (avg.) | 110° ↖ (NNW) |
Sunrise
07:35
Duration
13 h 03 min
Sunset
20:38
Moonrise
06:41
Moonset
20:33
Moon phase
New Moon
Illumination
0%
Weather in Puerto Rico on 18 August in previous years
| Year | Day | Nighttime | Average | Sun | UV | Humidity | Wind |
|---|---|---|---|---|---|---|---|
| 2025 |
+30°C
|
+25°C
|
+27°C | 13 h | 7 | 58% | 4 — 4 m/s |
| 2024 |
+28°C
|
+24°C
|
+26°C | 13 h | 7 | 65% | 4 — 4 m/s |
| 2023 |
+30°C
|
+24°C
|
+26°C | 13 h | 7 | 59% | 4 — 6 m/s |
| 2022 |
+27°C
|
+21°C
|
+24°C | 13 h | 6 | 71% | 4 — 5 m/s |
| 2021 |
+31°C
|
+24°C
|
+27°C | 13 h | 7 | 42% | 4 — 4 m/s |
| 2020 |
+27°C
|
+22°C
|
+25°C | 13 h | 6 | 63% | 4 — 5 m/s |