5-day weather forecast Barcelona Sep 20, 2026

27°21° · Sunny

Weather forecast Barcelona Sunday Sep 20, 2026: sunny, temperature from 21 °C to 27 °C.

Precipitation probability 15%. Wind up to 4 m/s (gusts 8.61 m/s). Air humidity 32–66%, atmospheric pressure 768–770 mm Hg, UV index up to 6.1.

Weather Alerts

ModerateSep 17, 10:57 AM — Sep 18, 02:59 PMTranslate with Google

Moderate rain warning. Litoral de Barcelona

Moderate rain warning

One-hour accumulated precipitation: 20 mm.

Be aware, keep up to date with the latest weather forecast. Moderate damages to people and properties may occur, especially to those vulnerable or in exposed areas.

5 days at a glance — tap a day to open it

Sunrise 07:36
Sunset 19:52

Waxing Gibbous73% illuminated
Moonrise 17:06 · Moonset 01:12

Chart

Table

← Sat, Sep 19

Sun, Sep 20, 2026

Mon, Sep 21 →

Forecast from 21 °C to 27 °C and precipitation

Temperature & Precipitation
Time	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00
Temperature (°C)	23	23	23	23	22	22	21	21	21	22	23	25	26	27	27	27	26	26	26	25	25	25	25	25
Precipitation (mm/hr)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0

Cloud cover and precipitation probability

Cloud cover & Rain chance
Time	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00
Cloud cover (%)	5	59	100	76	6	0	0	5	4	4	0	0	0	0	5	46	5	5	76	88	100	63	11	0
Rain chance (%)	4	8	15	11	5	5	4	4	4	3	2	1	1	1	1	3	1	1	7	9	11	6	2	1

Wind speed and direction

Wind & Wind gust
Time	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00
Wind (m/s)	1.31	2.11	2	1.61	1.69	1.39	1.19	1.31	1.5	0.81	0.31	0.61	1.39	1.81	2.39	3.61	4	3	2.39	2.11	1.5	1.19	1.61	1.19
Wind gust (m/s)	2.69	3.31	3.22	2.22	2	1.61	1.42	1.44	1.61	1	0.64	5.61	1.5	2.19	2.61	8.61	7	8	7.39	5.11	1.61	1.61	2.31	1.42
Wind direction (°)	WNW 282°	WNW 302°	NNW 328°	N 354°	NNE 30°	NNE 22°	N 355°	NNW 344°	NNW 334°	NW 319°	W 275°	SSE 155°	SE 138°	SE 134°	SE 139°	SE 143°	SE 144°	SE 146°	SSE 154°	SSE 161°	SSE 168°	SSW 211°	WSW 246°	W 279°

Air humidity

Humidity
Time	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00
Humidity (%)	60	60	61	63	66	66	65	63	60	55	50	45	39	34	32	33	38	41	43	45	47	48	47	45

Atmospheric pressure

Pressure
Time	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00
Pressure (mm Hg)	768	768	768	768	768	768	768	769	769	770	770	770	770	770	770	769	769	769	769	769	769	770	770	770

Ultraviolet index

UV Index
Time	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00
UV Index	0	0	0	0	0	0	0	0	0	0.4	1.3	2.9	4.5	5.8	6.1	5.5	4	2.3	1	0.2	0	0	0	0

Air quality & pollen

Air quality is available for the first three days only.

← Sat, Sep 19

Sun, Sep 20, 2026

Mon, Sep 21 →

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Data Sources & Methodology

Our weather forecasts are powered by a professional weather data provider that aggregates data from national weather services, satellite observations, radar networks, and over 80,000 weather stations worldwide. Forecast data is updated multiple times daily. We convert raw data into clear summaries — wind speed in m/s, pressure in mmHg — so you can plan your day with confidence.

Learn more about our methodology →