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	19	19	19	19	19	18	19	19	19	19	19	20	20	20	20	20	19	19	19	19	19	19	19
Precipitation (mm/hr)	0.34	0.15	0.25	0.2	1.03	0.62	0.26	0.48	0.4	0.02	0.04	0.06	0.05	0.22	0.11	0.13	0.32	0.31	0.3	0.28	0.2	0.29	0.33	0.27

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 (%)	100	100	100	100	100	100	100	100	100	100	100	100	99	100	100	100	100	100	100	100	100	100	100	100
Rain chance (%)	52	42	47	44	72	66	50	61	56	31	32	33	31	42	37	39	49	48	46	45	40	46	48	45

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)	1.19	2.69	2.81	2.81	4.5	3.61	3.81	3.11	2.89	2.5	2	2	2	2.39	2.31	2.31	2.39	2.69	3.11	2.89	3.19	3.69	3.69	3.89
Wind gust (m/s)	1.42	3.72	3.14	3.11	5.22	4.11	4.53	4.31	3.92	3.31	2.53	2.5	2.83	3	2.83	2.89	3.14	3.5	3.92	3.72	4	4.5	4.81	5
Wind direction (°)	WNW 288°	WSW 239°	SW 230°	SW 222°	SW 234°	SW 223°	SW 226°	WSW 241°	WSW 256°	WSW 258°	WNW 282°	W 275°	WSW 257°	SW 230°	SSW 213°	S 188°	SSE 166°	SSE 158°	SSE 159°	SSE 152°	SE 145°	SE 142°	SE 134°	SE 132°

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 (%)	90	89	89	89	88	92	91	90	90	89	87	86	84	84	86	86	86	86	84	83	83	85	85	84

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	765	766	767	767	767	767	767	767	766	766	767	767	767	768	769	770	770	770

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	0.1	0.2	0.7	1.7	2.5	3.2	2.5	1.5	0.9	0.3	0.1	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)	8	4.1	4.2	4.7	5.3	5.8	4.6	8.1	10.9	11.1	11.9	12.2	12.5	12.6	12.3	12.5	13.9	16	19.2	21.7	22.3	22.6	22.5	20.1
PM10 (µg/m³)	9.6	5.3	5.2	5.9	6.5	7.1	5.6	9.7	13.2	13.6	15	15.9	16.5	16.8	16.6	17.1	19	21.9	25.6	28	29	28.8	28.9	26.4
Ozone (O₃) (µg/m³)	30	35	42	48	51	52	53	55	57	60	65	71	74	73	69	64	56	47	40	36	34	33	32	32
NO₂ (µg/m³)	35.9	31.8	26.6	22.5	20.5	19.7	19.7	21	23.1	23.8	21.5	17.8	15.1	13.8	13.4	14.9	19.7	26.4	31.6	34	34.8	35	34.9	34
SO₂ (µg/m³)	7.7	7.1	6.3	5.8	5.7	5.9	6.3	7.3	8.6	9.4	9.5	9.1	8.7	8.2	7.6	7.1	6.7	6.3	6.1	6.1	6.2	6.2	5.8	5.3
CO (µg/m³)	119	108	105	109	121	140	157	174	189	194	178	151	131	127	130	137	152	170	178	166	142	123	113	106

← Tue, Sep 15

Wed, Sep 16, 2026

Thu, Sep 17 →

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.

Learn more about our methodology →