5-day weather forecast Buenos Aires 18-05-2026

Weather forecast Buenos Aires Monday, May 18 18.05.2026: sunny, temperature from 9 °C to 14 °C.

No precipitation expected. Wind up to 3.11 m/s (gusts 4.86 m/s). Air humidity 49–74%, atmospheric pressure 766–770 mm Hg, UV index up to 3.2.

Sunrise 07:43
Sunset 17:57

Waxing Crescent2% illuminated
Moonrise 09:59 · Moonset 19:31

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Table

← Sun, May 17

Mon, May 18, 2026

Tue, May 19 →

Forecast from 9 °C to 14 °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)	10	10	10	9	9	9	9	9	9	9	10	11	12	13	13	14	14	14	13	13	12	12	12	11
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 (%)	15	18	11	5	1	2	2	2	2	2	0	0	0	0	0	0	0	0	0	0	0	0	0	0
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)	3.11	2.89	2.69	2.5	2.39	2.31	2.61	2.81	2.5	2.39	2.19	1.89	1.61	1.39	1.19	1	1.11	1.11	1.11	1.5	2	2.11	2.39	2.69
Wind gust (m/s)	4.86	4.56	4.22	3.94	3.83	3.69	4.17	4.44	3.97	3.42	2.86	2.39	1.94	1.72	1.47	1.25	1.44	1.53	1.72	2.39	3.19	3.39	3.86	4.36
Wind direction (°)	SSE 164°	S 170°	S 180°	S 191°	SSW 199°	SSW 207°	SSW 208°	SSW 206°	SSW 207°	SSW 213°	SW 219°	SW 232°	WSW 255°	WSW 257°	WSW 256°	W 277°	W 275°	W 261°	WNW 292°	NW 312°	NW 313°	WNW 295°	WNW 285°	WNW 286°

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 (%)	67	68	70	71	71	71	72	73	74	71	67	63	59	55	52	50	49	50	54	57	59	61	63	66

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)	770	770	770	770	770	770	770	770	770	770	770	770	770	769	768	767	767	767	767	767	767	767	767	766

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	1.1	2.1	3	3.2	2.8	1.9	0.9	0.3	0	0	0	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)	7.7	6.4	5.8	5.7	6.7	9.2	11.5	11.2	10	8.6	6.2	4.9	4.6	4.5	5.2	11.7	19.2	24.5	26.9	26.3	23.5	20.8	17.6	14.5
PM10 (µg/m³)	8.6	7.3	6.6	6.5	7.5	9.9	12.1	11.9	11	9.6	7.2	5.7	5.4	5.2	5.9	12.3	19.9	25.1	27.4	26.9	24.2	21.4	18.2	15.1
Ozone (O₃) (µg/m³)	15	16	17	17	15	12	12	17	25	33	40	47	48	40	27	16	9	3	0	0	0	1	2	2
NO₂ (µg/m³)	19.1	16.6	14.6	13.7	14.5	16.3	17	15.6	13.2	10.9	8.1	5.3	5.9	12.3	22	30.4	35.9	40.1	42.7	43.4	42.5	41.2	40	38.3
SO₂ (µg/m³)	5.3	4.8	4.7	4.9	5.5	6.4	7.1	7.7	8.2	8.2	7.4	6.2	5.5	5.5	6	6.9	8.7	10.9	12.4	12.7	12.2	11.4	10.1	8.4
CO (µg/m³)	173.9	123.9	97.9	125.9	257.9	442.9	558.9	543.9	458.9	371.9	286.9	198.9	158.9	179.9	247.9	370.9	601.9	886.9	1072.9	1088.9	1005.9	881.9	706.9	491.9

← Sun, May 17

Mon, May 18, 2026

Tue, May 19 →

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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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