5-day weather forecast State of Rio de Janeiro 21-03-2026

Weather forecast State of Rio de Janeiro Saturday 21 March 21.03.2026: fog, temperature from 16 °C to 23 °C.

Precipitation probability 100%. Wind up to 1.31 m/s (gusts 2.17 m/s). Air humidity 78–99%, atmospheric pressure 758–761 mm Hg, UV index up to 10.5.

Sunrise 05:55
Sunset 18:05

Chart

Table

Type of temperature:

°C

°F

← Fri, 20 Mar

Sat, 21 Mar, 2026

Sun, 22 Mar →

Forecast from 16 °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)	18	18	18	17	17	17	16	17	19	21	23	22	22	22	22	22	21	20	18	18	18	18	17	17
Precipitation (mm/hr)	0.13	0.1	0.08	0.03	0	0	0	0	0	0.01	0.58	0.82	1.91	2.09	1.14	0.54	1.34	0.16	0.01	0.01	0.04	0	0	0

Cloud cover

Cloud cover
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 (%)	100	100	100	100	100	100	100	100	32	58	72	53	62	70	69	72	78	72	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)	1.11	1.11	1.11	0.89	0.61	0.5	0.5	0.5	1	1.19	1.11	0.69	0.61	0.69	0.69	0.89	1.11	1.19	1.31	1.19	0.89	0.61	0.5	0.31
Wind gust (m/s)	1.72	1.67	1.69	1.39	0.94	0.83	0.94	0.86	1.25	1.39	1.31	0.94	0.92	1.19	1.28	1.72	1.39	1.61	2.17	1.94	1.47	1.03	0.89	0.56

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 (%)	99	99	99	99	99	99	99	98	92	81	78	84	87	88	89	90	93	96	98	98	98	98	98	97

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)	760	759	759	759	759	759	760	761	761	761	761	761	760	759	758	758	758	759	760	761	761	761	761	761

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	0.4	1.7	3.9	8	10.5	9.5	7.6	7.1	3.6	1.5	0.3	0	0	0	0	0	0

← Fri, 20 Mar

Sat, 21 Mar, 2026

Sun, 22 Mar →

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.

Learn more about our methodology →