5-day weather forecast Rio de Janeiro 18-07-2026

Weather forecast Rio de Janeiro tomorrow 18.07.2026: sunny, temperature from 17 °C to 27 °C.

Precipitation probability 6%. Wind up to 3.39 m/s (gusts 6.92 m/s). Air humidity 43–70%, atmospheric pressure 763–767 mm Hg, UV index up to 6.3.

Sunrise 06:32
Sunset 17:25

Waxing Crescent23% illuminated
Moonrise 09:31 · Moonset 21:51

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Table

← Fri, Jul 17

Sat, Jul 18, 2026

Sun, Jul 19 →

Forecast from 17 °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)	19	18	18	18	18	18	17	17	19	21	23	25	26	27	27	26	25	23	22	22	21	21	20	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 (%)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
Rain chance (%)	4	4	4	5	5	5	6	6	5	3	2	2	1	1	1	1	2	4	5	5	4	4	4	5

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)	2.81	3	2.69	2.39	2.61	2.61	2.89	2.81	2.89	2.81	2.61	2.11	1.61	1.39	2	2.89	3.31	3.39	3.11	3.31	3.19	3.19	3	2.69
Wind gust (m/s)	5.89	6.31	5.67	5.03	5.47	5.42	6.03	5.69	4.81	3.72	3.28	2.64	2.14	1.92	2.89	4.36	5.36	6.75	6.5	6.92	6.72	6.72	6.31	5.67
Wind direction (°)	NNE 29°	NNE 21°	N 10°	N 3°	N 3°	N 356°	N 358°	N 357°	N 357°	N 359°	N 3°	N 10°	NNE 29°	NE 46°	ENE 63°	E 80°	E 93°	E 86°	ENE 76°	NE 50°	NE 40°	NE 39°	NE 38°	NNE 27°

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 (%)	62	64	65	65	66	68	70	70	66	59	53	48	45	43	44	46	53	62	67	66	64	64	65	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)	766	765	765	765	765	765	765	766	766	767	767	766	765	764	763	763	763	763	763	764	764	764	764	764

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	6.3	5.6	3.9	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)	19.4	18.5	17.1	15.5	14	12.7	12	13.3	15.3	15.9	13.2	12.1	10.7	9.4	8.2	7.5	7.4	7.5	7.8	8.2	9.1	11.6	13.5	14.4
PM10 (µg/m³)	21.5	20.5	19	17.1	15.5	14.1	13.2	14.5	16.4	17.9	15.9	15	13.6	12.1	10.8	10	9.8	9.8	10	10.4	11.1	13.6	15.5	16.2
Ozone (O₃) (µg/m³)	18	18	19	19	17	14	17	28	45	60	73	85	92	92	87	81	75	68	61	54	46	40	36	33
NO₂ (µg/m³)	35.5	33.1	30.2	27.6	25.5	23.6	21.8	20.3	19	16.7	12.5	7.4	3.7	2.5	2.7	3.6	5.2	7.5	10	12.9	16	18.4	19.7	20.3
SO₂ (µg/m³)	5.9	5.6	5.2	4.9	4.6	4.4	4.5	5.1	6.1	6.4	5.7	4.4	3.3	2.7	2.4	2.2	2.2	2.4	2.7	3.3	4.1	4.7	5	5.2
CO (µg/m³)	122	91	95	109	126	152	185	233	287	321	314	286	270	279	300	330	383	444	469	430	354	282	222	165

← Fri, Jul 17

Sat, Jul 18, 2026

Sun, Jul 19 →

Rio de Janeiro on the map

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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