Weather in Cayo Guillermo on 18 August 2026
Preliminary outlook for 18 August 2026
A preliminary estimate based on the 2019–2025 archive: daytime around +33°C and nighttime around +24°C, average precipitation 0.4 mm, wind around 3 m/s, humidity around 77%.
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.
+28°C
Weather archive — latest year: 2025
Partly Cloudy
Weather archive — latest year: 2025
Nighttime: +23°C
Precipitation: 0 mm
Wind: 2 — 3 m/s
Humidity: 78%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +34°C | Sun hours | 12 h |
| UV index | 7 | Cloud cover (avg.) | 47% |
| Pressure (avg.) | 758 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +31°C | Dew point (avg.) | +23°C |
| Heat index (avg.) | +31°C | Wind chill (avg.) | +28°C |
| Wind gusts (max.) | 5 m/s | Wind direction (avg.) | 165° ↓ (S) |
Sunrise
07:01
Duration
12 h 50 min
Sunset
19:51
Moonrise
02:10
Moonset
16:27
Moon phase
Last Quarter
Illumination
29%
+28°C
Weather archive — for 2024 year
Cloudy
Weather archive — for 2024 year
Nighttime: +25°C
Precipitation: 0.3 mm
Wind: 1 — 1 m/s
Humidity: 75%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +33°C | Sun hours | 7 h |
| UV index | 7 | Cloud cover (avg.) | 47% |
| Pressure (avg.) | 761 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +32°C | Dew point (avg.) | +23°C |
| Heat index (avg.) | +32°C | Wind chill (avg.) | +28°C |
| Wind gusts (max.) | 4 m/s | Wind direction (avg.) | 129° ↙ (SW) |
Sunrise
07:01
Duration
12 h 50 min
Sunset
19:51
Moonrise
19:23
Moonset
05:36
Moon phase
Waxing Gibbous
Illumination
93%
+29°C
Weather archive — for 2023 year
Overcast
Weather archive — for 2023 year
Nighttime: +25°C
Precipitation: 0 mm
Wind: 3 — 4 m/s
Humidity: 72%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +34°C | Sun hours | 7 h |
| UV index | 7 | Cloud cover (avg.) | 43% |
| Pressure (avg.) | 761 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +33°C | Dew point (avg.) | +23°C |
| Heat index (avg.) | +33°C | Wind chill (avg.) | +29°C |
| Wind gusts (max.) | 9 m/s | Wind direction (avg.) | 75° → (E) |
Sunrise
07:01
Duration
12 h 51 min
Sunset
19:52
Moonrise
08:47
Moonset
21:26
Moon phase
Waxing Crescent
Illumination
9%
+28°C
Weather archive — for 2022 year
Partly Cloudy
Weather archive — for 2022 year
Nighttime: +24°C
Precipitation: 0 mm
Wind: 1 — 2 m/s
Humidity: 76%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +33°C | Sun hours | 8 h |
| UV index | 6 | Cloud cover (avg.) | 52% |
| Pressure (avg.) | 761 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +32°C | Dew point (avg.) | +23°C |
| Heat index (avg.) | +32°C | Wind chill (avg.) | +28°C |
| Wind gusts (max.) | 4 m/s | Wind direction (avg.) | 115° → (E) |
Sunrise
07:01
Duration
12 h 50 min
Sunset
19:51
Moonrise
No moonrise
Moonset
13:16
Moon phase
Waning Gibbous
Illumination
54%
+27°C
Weather archive — for 2021 year
Cloudy
Weather archive — for 2021 year
Nighttime: +24°C
Precipitation: 1.1 mm
Wind: 5 — 5 m/s
Humidity: 79%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +30°C | Sun hours | 7 h |
| UV index | 7 | Cloud cover (avg.) | 44% |
| Pressure (avg.) | 762 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 8 km | Sea temperature | — |
| Feels like (avg.) | +30°C | Dew point (avg.) | +22°C |
| Heat index (avg.) | +30°C | Wind chill (avg.) | +27°C |
| Wind gusts (max.) | 11 m/s | Wind direction (avg.) | 101° → (ESE) |
Sunrise
07:01
Duration
12 h 50 min
Sunset
19:51
Moonrise
16:58
Moonset
02:51
Moon phase
Waxing Gibbous
Illumination
69%
+28°C
Weather archive — for 2020 year
Partly Cloudy
Weather archive — for 2020 year
Nighttime: +25°C
Precipitation: 1.2 mm
Wind: 2 — 2 m/s
Humidity: 78%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +32°C | Sun hours | 7 h |
| UV index | 6 | Cloud cover (avg.) | 74% |
| Pressure (avg.) | 759 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 9 km | Sea temperature | — |
| Feels like (avg.) | +32°C | Dew point (avg.) | +24°C |
| Heat index (avg.) | +32°C | Wind chill (avg.) | +28°C |
| Wind gusts (max.) | 5 m/s | Wind direction (avg.) | 140° ↓ (S) |
Sunrise
07:01
Duration
12 h 50 min
Sunset
19:51
Moonrise
06:22
Moonset
19:55
Moon phase
New Moon
Illumination
0%
+28°C
Weather archive — for 2019 year
Clear/Sunny
Weather archive — for 2019 year
Nighttime: +25°C
Precipitation: 0 mm
Wind: 4 — 5 m/s
Humidity: 79%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +33°C | Sun hours | 10 h |
| UV index | 7 | Cloud cover (avg.) | 5% |
| Pressure (avg.) | 762 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +33°C | Dew point (avg.) | +23°C |
| Heat index (avg.) | +33°C | Wind chill (avg.) | +29°C |
| Wind gusts (max.) | 11 m/s | Wind direction (avg.) | 75° ↗ (ENE) |
Sunrise
07:01
Duration
12 h 51 min
Sunset
19:52
Moonrise
22:04
Moonset
09:29
Moon phase
Waning Gibbous
Illumination
78%
Weather in Cayo Guillermo on 18 August in previous years
| Year | Day | Nighttime | Average | Sun | UV | Humidity | Wind |
|---|---|---|---|---|---|---|---|
| 2025 |
+34°C
|
+23°C
|
+28°C | 12 h | 7 | 78% | 2 — 3 m/s |
| 2024 |
+33°C
|
+25°C
|
+28°C | 7 h | 7 | 75% | 1 — 1 m/s |
| 2023 |
+34°C
|
+25°C
|
+29°C | 7 h | 7 | 72% | 3 — 4 m/s |
| 2022 |
+33°C
|
+24°C
|
+28°C | 8 h | 6 | 76% | 1 — 2 m/s |
| 2021 |
+30°C
|
+24°C
|
+27°C | 7 h | 7 | 79% | 5 — 5 m/s |
| 2020 |
+32°C
|
+25°C
|
+28°C | 7 h | 6 | 78% | 2 — 2 m/s |
| 2019 |
+33°C
|
+25°C
|
+28°C | 10 h | 7 | 79% | 4 — 5 m/s |