5-day weather forecast Rio de Janeiro 21-05-2026

Weather forecast Rio de Janeiro Thursday, May 21 21.05.2026: light rain shower, temperature from 20 °C to 21 °C.

Precipitation probability 100%. Wind up to 3.69 m/s (gusts 5.22 m/s). Air humidity 85–94%, atmospheric pressure 764–768 mm Hg, UV index up to 6.

Sunrise 06:21
Sunset 17:17

Waxing Crescent24% illuminated
Moonrise 11:13 · Moonset 22:25

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← Wed, May 20

Thu, May 21, 2026

Forecast from 20 °C to 21 °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	20	20	20	20	20	20	20	20	20	20	20	20	20	20	20	20
Precipitation (mm/hr)	0.24	0.26	0.45	0.42	0.38	0.52	1.45	0.98	0.47	0.42	0.26	0.28	0.32	0.39	0.75	0.62	0.7	0.7	0.79	0.6	0.5	0.33	0.3	0.3

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 (%)	88	92	97	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100
Rain chance (%)	100	100	100	100	100	100	100	100	100	100	100	100	100	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)	1.89	1.69	1.5	1.19	2	2.39	2.5	2.81	2.31	2.19	2	1.61	1.39	1.39	1.89	2.89	3.19	3.39	3.69	3.31	3	2.61	2.39	2.19
Wind gust (m/s)	2.81	2.47	2.19	1.72	2.83	3.36	3.5	3.89	3.19	3.06	2.75	2.17	1.92	1.92	2.58	3.94	4.39	4.81	5.22	4.69	4.31	3.78	3.5	3.19
Wind direction (°)	WNW 289°	W 279°	W 262°	SSW 208°	S 171°	SSE 157°	S 174°	S 181°	S 182°	S 181°	S 179°	S 174°	S 182°	SSW 193°	S 182°	S 171°	S 172°	S 173°	S 174°	SSE 168°	SSE 163°	SSE 158°	SSE 151°	SE 144°

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 (%)	92	92	93	94	93	93	93	94	93	93	92	92	93	92	93	92	91	90	89	88	86	85	86	87

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)	764	764	764	764	764	764	764	765	766	766	767	766	766	765	765	765	766	767	767	767	767	768	768	768

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	0.1	0.3	6	6	6	6	6	6	6	6	0	0	0	0	0	0

← Wed, May 20

Thu, May 21, 2026

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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