5-day weather forecast Chennai 21-05-2026

Weather forecast Chennai Thursday, May 21 21.05.2026: sunny, temperature from 29 °C to 40 °C.

Precipitation probability 71%. Wind up to 12 m/s (gusts 16.5 m/s). Air humidity 33–65%, atmospheric pressure 749–754 mm Hg, UV index up to 10.2.

Sunrise 05:42
Sunset 18:29

Waxing Crescent24% illuminated
Moonrise 10:07 · Moonset 23:18

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← Wed, May 20

Thu, May 21, 2026

Forecast from 29 °C to 40 °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)	30	29	30	31	32	32	32	33	34	35	37	38	40	40	39	37	36	37	34	33	34	34	34	34
Precipitation (mm/hr)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0.01	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 (%)	4	8	8	9	11	9	6	4	4	5	4	5	5	18	18	12	10	75	12	11	5	5	4	4
Rain chance (%)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	71	0	0	0	0	0	0

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)	12	10.69	9.39	8.81	9.31	7.61	6.11	6.89	7	7	6.69	6.19	4.89	3.81	0.89	2.31	4.5	5.81	9	9.81	9.31	9.81	9.39	7.69
Wind gust (m/s)	16.5	15.25	13.86	13.39	14.17	11.89	9.42	10	10.11	10.22	10.08	9.08	7.86	6.5	1.44	4.08	8.22	9.86	15.58	16.11	16.11	15.97	15.39	13.72
Wind direction (°)	WSW 241°	WSW 246°	WSW 253°	W 264°	W 274°	W 272°	W 263°	W 270°	W 278°	WNW 292°	WNW 286°	W 281°	WNW 290°	NW 323°	NE 36°	SE 138°	SSE 155°	SSW 206°	SW 230°	SW 234°	WSW 237°	WSW 242°	WSW 249°	WSW 248°

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 (%)	65	65	63	56	52	53	52	49	45	42	39	35	33	34	40	44	50	43	46	47	45	44	46	48

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)	752	751	751	751	751	752	752	753	754	754	753	752	752	751	750	750	749	750	751	751	751	752	752	751

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	0.2	0.9	1.9	4.7	8	9.3	10.2	9	6.3	3.7	1.5	0.4	0	0	0	0	0	0

← Wed, May 20

Thu, May 21, 2026

Chennai 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 →