Weather in Barcelona on 21 September 2026
Preliminary outlook for 21 September 2026
A preliminary estimate based on the 2020–2025 archive: daytime around +24°C and nighttime around +20°C, average precipitation 1.1 mm, wind around 3 m/s, humidity around 67%.
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.
+23°C
Weather archive — latest year: 2025
Thundery outbreaks in nearby
Weather archive — latest year: 2025
Nighttime: +21°C
Precipitation: 1 mm
Wind: 2 — 3 m/s
Humidity: 74%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +26°C | Sun hours | 5 h |
| UV index | 6 | Cloud cover (avg.) | 49% |
| 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.) | +19°C |
| Heat index (avg.) | +26°C | Wind chill (avg.) | +24°C |
| Wind gusts (max.) | 6 m/s | Wind direction (avg.) | 175° → (ESE) |
Sunrise
07:38
Duration
12 h 12 min
Sunset
19:50
Moonrise
07:09
Moonset
19:39
Moon phase
New Moon
Illumination
0%
+21°C
Weather archive — for 2024 year
Cloudy
Weather archive — for 2024 year
Nighttime: +18°C
Sea temperature: +24°C
Precipitation: 0.4 mm
Wind: 3 — 4 m/s
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +23°C | Sun hours | 8 h |
| UV index | 5 | Cloud cover (avg.) | 68% |
| Pressure (avg.) | 763 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | +24°C |
| Feels like (avg.) | +20°C | Dew point (avg.) | +15°C |
| Heat index (avg.) | +22°C | Wind chill (avg.) | +20°C |
| Wind gusts (max.) | 7 m/s | Wind direction (avg.) | 74° → (E) |
Sunrise
07:38
Duration
12 h 12 min
Sunset
19:50
Moonrise
21:25
Moonset
11:22
Moon phase
Waning Gibbous
Illumination
70%
+23°C
Weather archive — for 2023 year
Clear/Sunny
Weather archive — for 2023 year
Nighttime: +20°C
Precipitation: 0 mm
Wind: 4 — 6 m/s
Humidity: 63%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +26°C | Sun hours | 12 h |
| UV index | 6 | Cloud cover (avg.) | 13% |
| Pressure (avg.) | 756 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +23°C | Dew point (avg.) | +15°C |
| Heat index (avg.) | +23°C | Wind chill (avg.) | +23°C |
| Wind gusts (max.) | 9 m/s | Wind direction (avg.) | 258° ↙ (WSW) |
Sunrise
07:37
Duration
12 h 14 min
Sunset
19:51
Moonrise
14:13
Moonset
23:02
Moon phase
First Quarter
Illumination
43%
+22°C
Weather archive — for 2022 year
Partly Cloudy
Weather archive — for 2022 year
Nighttime: +21°C
Precipitation: 0.1 mm
Wind: 3 — 5 m/s
Humidity: 69%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +24°C | Sun hours | 9 h |
| UV index | 5 | Cloud cover (avg.) | 64% |
| Pressure (avg.) | 763 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +23°C | Dew point (avg.) | +17°C |
| Heat index (avg.) | +23°C | Wind chill (avg.) | +22°C |
| Wind gusts (max.) | 8 m/s | Wind direction (avg.) | 150° ↘ (SE) |
Sunrise
07:37
Duration
12 h 14 min
Sunset
19:51
Moonrise
03:03
Moonset
18:22
Moon phase
Waning Crescent
Illumination
15%
+19°C
Weather archive — for 2021 year
Heavy rain at times
Weather archive — for 2021 year
Nighttime: +17°C
Precipitation: 1.5 mm
Wind: 2 — 3 m/s
Humidity: 65%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +21°C | Sun hours | 9 h |
| UV index | 4 | Cloud cover (avg.) | 52% |
| Pressure (avg.) | 766 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +19°C | Dew point (avg.) | +13°C |
| Heat index (avg.) | +20°C | Wind chill (avg.) | +19°C |
| Wind gusts (max.) | 5 m/s | Wind direction (avg.) | 198° ↖ (NW) |
Sunrise
07:38
Duration
12 h 12 min
Sunset
19:50
Moonrise
20:28
Moonset
07:49
Moon phase
Full Moon
Illumination
100%
+23°C
Weather archive — for 2020 year
Moderate or heavy rain shower
Weather archive — for 2020 year
Nighttime: +21°C
Precipitation: 3.6 mm
Wind: 3 — 4 m/s
Humidity: 62%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +25°C | Sun hours | 7 h |
| UV index | 6 | Cloud cover (avg.) | 72% |
| Pressure (avg.) | 761 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 9 km | Sea temperature | — |
| Feels like (avg.) | +23°C | Dew point (avg.) | +17°C |
| Heat index (avg.) | +24°C | Wind chill (avg.) | +22°C |
| Wind gusts (max.) | 7 m/s | Wind direction (avg.) | 153° → (ESE) |
Sunrise
07:38
Duration
12 h 12 min
Sunset
19:50
Moonrise
11:53
Moonset
22:19
Moon phase
Waxing Crescent
Illumination
25%
Weather in Barcelona on 21 September in previous years
| Year | Day | Nighttime | Average | Sun | UV | Humidity | Wind |
|---|---|---|---|---|---|---|---|
| 2025 |
+26°C
|
+21°C
|
+23°C | 5 h | 6 | 74% | 2 — 3 m/s |
| 2024 |
+23°C
|
+18°C
|
+21°C | 8 h | 5 | 71% | 3 — 4 m/s |
| 2023 |
+26°C
|
+20°C
|
+23°C | 12 h | 6 | 63% | 4 — 6 m/s |
| 2022 |
+24°C
|
+21°C
|
+22°C | 9 h | 5 | 69% | 3 — 5 m/s |
| 2021 |
+21°C
|
+17°C
|
+19°C | 9 h | 4 | 65% | 2 — 3 m/s |
| 2020 |
+25°C
|
+21°C
|
+23°C | 7 h | 6 | 62% | 3 — 4 m/s |