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)	28	28	27	28	28	28	28	28	28	29	30	30	29	29	29	29	28	28	28	28	28	28	27	27
Precipitation (mm/hr)	1.52	1.71	2.18	0.35	0.03	0	0	0	0	0.23	0.19	0.33	0.02	0.01	0	0	0	0	0.05	0.88	1.25	2.41	2.23	1.9

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 (%)	91	77	85	100	100	100	100	100	100	78	66	96	95	100	100	100	100	100	100	97	78	96	100	82
Rain chance (%)	68	65	72	45	25	21	21	20	20	30	21	36	19	19	18	20	21	22	26	61	61	75	77	69

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)	4	3	3	2.89	3	3	2.61	1.81	1.5	1.69	2.31	4.5	5.19	5	5	4.5	4.19	4	4	3.69	3.5	3.31	2.81	1.89
Wind gust (m/s)	5.5	4.03	4.19	3.83	4.22	4.22	3.5	2.53	2.11	2.22	2.61	7.5	8.19	10	9	7.5	4.31	4.53	4.92	4.61	4.42	4.42	3.53	2.5
Wind direction (°)	SSE 152°	SSE 155°	SSE 157°	SSE 165°	S 169°	S 185°	SSW 201°	SSW 199°	SSW 209°	SSW 204°	SSE 158°	SSE 147°	SE 141°	SE 142°	SE 145°	SSE 148°	SSE 147°	SE 146°	SE 146°	SSE 154°	SSE 166°	S 179°	S 185°	S 173°

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 (%)	80	79	81	79	78	76	76	74	74	72	67	68	71	71	72	74	77	78	78	78	77	79	83	82

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)	758	757	757	757	757	757	758	758	759	759	759	758	758	757	756	756	756	757	757	758	758	758	758	758

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	0.7	2.5	5.2	6.8	8.3	8.8	8.6	6.1	3.2	1.1	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)	11.5	11.2	11.4	11.3	11.4	12.1	13.3	12.5	10	8.3	7.3	6.9	6.7	5.5	4.8	4.6	4.3	4.7	6.1	7.2	8.6	10.3	10.7	8.6
PM10 (µg/m³)	12.3	12.1	12.3	12.3	12.5	13.2	14.6	13.9	11.4	9.5	8.3	8	7.9	6.7	5.8	5.7	5.3	5.5	7	8.1	9.4	11.1	11.6	9.6
Ozone (O₃) (µg/m³)	37	34	31	28	24	24	28	34	41	50	61	68	71	71	68	62	54	47	43	40	38	38	38	39
NO₂ (µg/m³)	17.9	21.2	23.8	25.5	26.7	26.7	25.3	22.7	19.9	16.7	13.1	10.2	8.2	6.9	6.5	7.5	9.5	11.2	12.1	12.6	13.3	14	14.9	16.2
SO₂ (µg/m³)	12.8	15.4	17.9	19.6	21.2	23.5	28.2	33.6	35.8	32.2	25.5	19.5	15.5	12.1	9.6	8.1	7.4	7.1	7.1	7.5	7.9	8	8.2	9.1
CO (µg/m³)	329	346	356	353	343	340.3	336.5	323.3	299	278	255	236	222	212	207	208	214	226	249	278	298	300	294	291

← Thu, Oct 15

Fri, Oct 16, 2026

Sat, Oct 17 →

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 →