5-day weather forecast Barcelona 20-05-2026

Weather forecast Barcelona Wednesday, May 20 20.05.2026: sunny, temperature from 18 °C to 23 °C.

No precipitation expected. Wind up to 4.31 m/s (gusts 4.94 m/s). Air humidity 55–77%, atmospheric pressure 767–770 mm Hg, UV index up to 8.7.

Sunrise 06:28
Sunset 21:08

Waxing Crescent15% illuminated
Moonrise 09:42 · Moonset 00:43

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Table

← Tue, May 19

Wed, May 20, 2026

Thu, May 21 →

Forecast from 18 °C to 23 °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)	19	19	19	18	18	18	18	18	19	20	21	21	22	22	22	23	23	22	22	22	21	21	21	20
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 (%)	48	24	22	25	24	18	12	11	11	12	12	11	10	9	7	7	8	8	7	7	8	8	9	10
Rain chance (%)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0

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)	1.19	1.11	1	1.19	1.61	1.61	1.69	1.5	1.61	1.61	1.61	2	2.5	2.81	3	3.5	4.31	4.11	3.5	3.11	2.5	2.11	1.5	1.69
Wind gust (m/s)	1.69	1.64	1.56	1.89	2.61	2.69	2.89	2.53	2.31	2.08	1.97	2.36	2.89	3.22	3.44	4.03	4.94	4.72	4.14	3.86	3.28	2.89	2.17	2.58
Wind direction (°)	ENE 59°	NE 50°	NE 44°	NE 45°	NE 47°	NE 46°	NE 41°	NE 39°	ENE 57°	E 81°	ESE 110°	SE 145°	SSE 167°	S 177°	S 182°	S 183°	S 177°	S 178°	S 182°	SSW 192°	SSW 200°	SSW 212°	SW 231°	WSW 245°

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 (%)	76	76	77	77	77	77	76	76	72	66	63	61	59	58	56	55	56	56	57	59	61	63	64	64

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)	767	767	767	767	767	767	768	768	769	769	770	770	770	770	770	770	769	769	769	769	769	769	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	0.4	1.4	2.9	4.9	6.9	8.3	8.7	7.9	6.2	4.2	2.4	1	0.3	0	0	0

Air quality & pollen

Air quality
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
PM2.5 (µg/m³)	9.9	10.6	14.9	18.1	20.8	22.9	25.7	28.6	30.2	29.8	27.3	20.9	17.1	17.9	18.9	19.3	19.1	18.1	17	16	15.2	15	14.8	15.5
PM10 (µg/m³)	17.8	20	22.9	25.9	28.1	28.7	31.1	32.8	33.6	32.9	30.1	24.8	22.6	24	25.7	26.6	26.5	25.1	23.7	22.3	21.3	21	20.8	21.6
Ozone (O₃) (µg/m³)	76	55	60	67	69.2	71	61	54	49	47	50	63	82	98	108	114	118	119	118	116	113	109	104	98
NO₂ (µg/m³)	40.9	60.8	54	39	32.7	21.5	22.8	23.6	23.9	23.6	22.7	20.8	18.1	15.5	13	10.6	8.7	7.6	7	6.9	7.3	8.2	9.8	12.4
SO₂ (µg/m³)	4.8	5.6	5.4	5.4	4.9	3.4	3.3	3.2	3.1	2.9	2.9	3.1	3.5	3.7	3.6	3.4	3.1	2.9	2.7	2.5	2.4	2.4	2.5	2.9
CO (µg/m³)	138.9	152.9	154.4	177.4	214.1	251.9	262.9	262.9	240.9	206.9	188.9	207.9	242.9	258.9	235.9	193.9	160.9	149.9	147.9	146.9	144.9	144.9	145.9	147.9

← Tue, May 19

Wed, May 20, 2026

Thu, May 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.

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