5-day weather forecast Rio de Janeiro 17-05-2026

Weather forecast Rio de Janeiro tomorrow 17.05.2026: sunny, temperature from 21 °C to 27 °C.

Precipitation probability 100%. Wind up to 4.39 m/s (gusts 7.06 m/s). Air humidity 64–96%, atmospheric pressure 760–764 mm Hg, UV index up to 6.1.

Sunrise 06:19
Sunset 17:19

Waxing Crescent0% illuminated
Moonrise 07:08 · Moonset 17:58

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← Sat, May 16

Sun, May 17, 2026

Mon, May 18 →

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)	21	21	21	21	21	21	21	21	22	24	26	27	27	27	27	25	24	23	22	23	22	22	22	22
Precipitation (mm/hr)	0	0	0	0	0	0	0	0	0	0	0	0	0	0.58	0.85	1.16	0.57	0.39	0.46	0.1	0.58	0.68	0.41	0.42

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 (%)	25	24	24	24	23	23	22	17	8	5	5	6	7	77	83	86	73	78	77	75	94	100	100	100
Rain chance (%)	0	0	0	0	0	0	0	0	0	0	0	0	0	100	100	100	100	100	100	100	100	100	100	100

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)	1.61	0.69	0.61	0.89	1.19	1.81	1.89	2.31	1.81	1.19	0.69	1.5	2.39	2.69	3.11	3.31	3.61	3.19	3.5	3.19	4.39	3.89	2.19	3.19
Wind gust (m/s)	2.47	1.08	0.92	1.39	1.86	2.86	3.11	3.72	2.47	1.47	0.83	1.72	2.81	3.28	3.97	4.36	4.94	4.56	5.28	4.94	7.06	6.42	3.03	4.47
Wind direction (°)	NE 34°	NNE 12°	ENE 59°	NE 54°	NE 40°	NNE 32°	NNE 28°	NNE 23°	NNE 19°	NNE 22°	NE 52°	SSE 152°	SSE 153°	SSE 150°	S 173°	SSW 195°	SW 223°	WSW 247°	W 260°	WSW 257°	WSW 247°	WSW 251°	W 278°	W 270°

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 (%)	91	90	90	90	90	91	92	90	84	75	68	64	65	65	67	77	82	88	93	92	93	96	95	95

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)	762	762	762	761	761	761	761	761	761	761	761	761	761	760	760	760	761	761	762	763	763	764	763	763

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	0.2	0.9	2.4	4.3	5.8	6.1	5.4	3.8	2	0.6	0	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)	16.8	16.3	15.8	15.9	17.5	17.3	15.2	14.5	14.3	14.5	13.7	12.5	11.9	11.7	12.8	15.8	19.7	22.9	20.2	21.2	21.1	19.6	17.8	16.3
PM10 (µg/m³)	17.9	17.3	16.8	16.8	18.4	17.8	15.6	14.9	14.8	15.5	15	13.8	13.4	13.2	14	16.8	20.6	23.7	20.9	21.5	21.3	19.7	18	16.4
Ozone (O₃) (µg/m³)	34	31	28	32	49	73	95	112	126	134	133	126	118	110	101	91	80	68	57	46	35	27	23	21
NO₂ (µg/m³)	23.3	22.6	22.5	21.4	18.7	15.1	11.8	9	6.5	4.8	3.8	3.6	4.8	8.2	13.1	17.5	20.9	23.8	26.2	28.4	30.2	30.6	28.6	25.3
SO₂ (µg/m³)	5.4	5.1	4.9	5	5.9	7.2	8	7.7	6.9	6.1	5.4	4.8	4.6	5.2	6.2	7.2	8	8.7	9	8.6	7.7	7	6.5	6
CO (µg/m³)	367.9	347.9	307.9	279.9	275.9	282.9	293.9	309.9	329.9	337.9	323.9	297.9	276.9	267.9	263.9	264.9	256.9	253.9	291.9	417.9	584.9	686.9	663.9	575.9

← Sat, May 16

Sun, May 17, 2026

Mon, May 18 →

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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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