Weather in Castelldefels on 17 August 2026
Preliminary outlook for 17 August 2026
A preliminary estimate based on the 2020–2025 archive: daytime around +28°C and nighttime around +24°C, average precipitation 2 mm, wind around 4 m/s, humidity around 65%.
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.
+30°C
Weather archive — latest year: 2025
Clear/Sunny
Weather archive — latest year: 2025
Nighttime: +28°C
Precipitation: 0 mm
Wind: 3 — 4 m/s
Humidity: 53%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +33°C | Sun hours | 13 h |
| UV index | 7 | Cloud cover (avg.) | 1% |
| Pressure (avg.) | 760 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +32°C | Dew point (avg.) | +20°C |
| Heat index (avg.) | +32°C | Wind chill (avg.) | +30°C |
| Wind gusts (max.) | 9 m/s | Wind direction (avg.) | 231° ↓ (S) |
Sunrise
07:03
Duration
13 h 45 min
Sunset
20:48
Moonrise
00:14
Moonset
16:09
Moon phase
Last Quarter
Illumination
37%
+26°C
Weather archive — for 2024 year
Clear/Sunny
Weather archive — for 2024 year
Nighttime: +25°C
Sea temperature: +26°C
Precipitation: 0 mm
Wind: 3 — 6 m/s
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +28°C | Sun hours | 12 h |
| UV index | 7 | Cloud cover (avg.) | 44% |
| Pressure (avg.) | 761 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | +26°C |
| Feels like (avg.) | +28°C | Dew point (avg.) | +20°C |
| Heat index (avg.) | +28°C | Wind chill (avg.) | +26°C |
| Wind gusts (max.) | 10 m/s | Wind direction (avg.) | 196° ↓ (SSW) |
Sunrise
07:04
Duration
13 h 44 min
Sunset
20:48
Moonrise
19:49
Moonset
03:48
Moon phase
Waxing Gibbous
Illumination
86%
+26°C
Weather archive — for 2023 year
Clear/Sunny
Weather archive — for 2023 year
Nighttime: +25°C
Precipitation: 0 mm
Wind: 5 — 7 m/s
Humidity: 74%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +29°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.) | +29°C | Dew point (avg.) | +21°C |
| Heat index (avg.) | +29°C | Wind chill (avg.) | +27°C |
| Wind gusts (max.) | 12 m/s | Wind direction (avg.) | 79° → (E) |
Sunrise
07:03
Duration
13 h 46 min
Sunset
20:49
Moonrise
08:06
Moonset
21:47
Moon phase
Waxing Crescent
Illumination
1%
+25°C
Weather archive — for 2022 year
Moderate or heavy rain shower
Weather archive — for 2022 year
Nighttime: +22°C
Precipitation: 11.9 mm
Wind: 4 — 5 m/s
Humidity: 69%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +27°C | Sun hours | 10 h |
| UV index | 7 | Cloud cover (avg.) | 42% |
| Pressure (avg.) | 757 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +27°C | Dew point (avg.) | +20°C |
| Heat index (avg.) | +27°C | Wind chill (avg.) | +25°C |
| Wind gusts (max.) | 9 m/s | Wind direction (avg.) | 101° → (ESE) |
Sunrise
07:03
Duration
13 h 45 min
Sunset
20:48
Moonrise
23:50
Moonset
13:04
Moon phase
Waning Gibbous
Illumination
61%
+24°C
Weather archive — for 2021 year
Clear/Sunny
Weather archive — for 2021 year
Nighttime: +23°C
Precipitation: 0 mm
Wind: 3 — 3 m/s
Humidity: 58%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +26°C | Sun hours | 13 h |
| UV index | 6 | Cloud cover (avg.) | 7% |
| Pressure (avg.) | 763 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +26°C | Dew point (avg.) | +15°C |
| Heat index (avg.) | +26°C | Wind chill (avg.) | +24°C |
| Wind gusts (max.) | 6 m/s | Wind direction (avg.) | 193° → (ESE) |
Sunrise
07:03
Duration
13 h 45 min
Sunset
20:48
Moonrise
16:34
Moonset
01:07
Moon phase
First Quarter
Illumination
61%
+25°C
Weather archive — for 2020 year
Cloudy
Weather archive — for 2020 year
Nighttime: +22°C
Precipitation: 0 mm
Wind: 3 — 4 m/s
Humidity: 70%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +26°C | Sun hours | 8 h |
| UV index | 5 | Cloud cover (avg.) | 60% |
| Pressure (avg.) | 760 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +27°C | Dew point (avg.) | +20°C |
| Heat index (avg.) | +27°C | Wind chill (avg.) | +25°C |
| Wind gusts (max.) | 7 m/s | Wind direction (avg.) | 136° ↘ (SSE) |
Sunrise
07:04
Duration
13 h 44 min
Sunset
20:48
Moonrise
04:52
Moonset
20:10
Moon phase
Waning Crescent
Illumination
1%
Weather in Castelldefels on 17 August in previous years
| Year | Day | Nighttime | Average | Sun | UV | Humidity | Wind |
|---|---|---|---|---|---|---|---|
| 2025 |
+33°C
|
+28°C
|
+30°C | 13 h | 7 | 53% | 3 — 4 m/s |
| 2024 |
+28°C
|
+25°C
|
+26°C | 12 h | 7 | 68% | 3 — 6 m/s |
| 2023 |
+29°C
|
+25°C
|
+26°C | 13 h | 7 | 74% | 5 — 7 m/s |
| 2022 |
+27°C
|
+22°C
|
+25°C | 10 h | 7 | 69% | 4 — 5 m/s |
| 2021 |
+26°C
|
+23°C
|
+24°C | 13 h | 6 | 58% | 3 — 3 m/s |
| 2020 |
+26°C
|
+22°C
|
+25°C | 8 h | 5 | 70% | 3 — 4 m/s |