5-day weather forecast Chennai 18-05-2026

Weather forecast Chennai tomorrow 18.05.2026: sunny, temperature from 29 °C to 35 °C.

Precipitation probability 100%. Wind up to 10.39 m/s (gusts 14.14 m/s). Air humidity 53–80%, atmospheric pressure 752–755 mm Hg, UV index up to 9.7.

Sunrise 05:43
Sunset 18:28

Waxing Crescent2% illuminated
Moonrise 06:49 · Moonset 20:20

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Table

← Sun, May 17

Mon, May 18, 2026

Tue, May 19 →

Forecast from 29 °C to 35 °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	30	30	29	29	29	29	30	31	32	33	34	35	35	34	33	31	31	31	31	30	30	30	30
Precipitation (mm/hr)	0.93	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 (%)	78	22	49	54	44	45	32	48	50	32	32	29	24	23	20	19	13	10	6	5	5	6	9	8
Rain chance (%)	100	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	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)	7.69	7.61	7.19	6.69	6.39	6.81	6.5	7.19	7.11	6.5	5.89	5.61	6.39	8.11	9.61	10.39	10	9.69	9.69	9.89	9.69	9.81	9.81	9.39
Wind gust (m/s)	10.67	10.44	9.97	9.33	8.89	9.5	8.92	9.61	9.17	8.36	7.47	7	8.28	9.94	12.5	14.14	13.61	13.42	13.69	13.67	13.42	13.58	13.56	13.06
Wind direction (°)	SSW 202°	SSW 201°	SSW 197°	SSW 198°	SSW 194°	SSW 193°	SSW 196°	SSW 199°	SSW 202°	SSW 205°	SSW 199°	S 190°	S 178°	SSE 163°	SSE 159°	SSE 162°	SSE 162°	SSE 167°	SSE 167°	S 176°	S 182°	S 187°	S 189°	SSW 193°

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 (%)	77	77	77	76	76	76	75	70	64	60	57	54	53	54	55	63	71	74	77	78	78	79	80	79

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)	753	752	752	752	752	753	753	754	754	755	754	754	753	752	752	752	752	752	752	753	754	754	754	754

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	0.8	1.9	3.7	7.3	9.7	9.4	8.5	5.5	2.2	0.6	0.2	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)	22.9	19.7	17	15.9	15.7	15.4	14.8	13.8	13.1	13	13.5	14.7	16.2	18.7	22	25.1	27.6	28.1	27.2	27.3	27.3	26.6	24.9	23
PM10 (µg/m³)	31.9	27.6	23.5	21	20.2	19.6	18.7	17.1	16.1	15.9	16.4	17.7	20	24	29	33.3	36.8	38	36.4	36.1	35.5	33.7	30.8	28.5
Ozone (O₃) (µg/m³)	126	116	108	100	92	83	74	67	63	62	64	68	74	86	108	135	156	167	173	175	175	172	164	149
NO₂ (µg/m³)	5.8	6	7.3	9.2	10.9	12.2	13.2	14	14.3	14.2	14.2	14.8	15.4	15	12.8	9.5	6.9	5.4	4.5	4.4	5.3	6.9	8.4	9.4
SO₂ (µg/m³)	8.6	7.7	8.6	10.7	12.9	15.5	18.3	20.2	20.3	19.4	18.7	18.8	19	18.9	18.2	17.1	15.7	13.7	11.4	10	10.2	11.3	11.8	10.7
CO (µg/m³)	289.9	277.9	294.9	322.9	337.9	323.9	296.9	276.9	268.9	268.9	279.9	314.9	360.9	385.9	368.9	330.9	301.9	290.9	288.9	292.9	305.9	326.9	344.9	359.9

← Sun, May 17

Mon, May 18, 2026

Tue, May 19 →

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.

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