5-day weather forecast Chennai Oct 18, 2026
30°Weather forecast Chennai Sunday Oct 18, 2026: patchy rain possible, temperature from 27 °C to 30 °C.
Precipitation probability 80%. Wind up to 4.39 m/s (gusts 9 m/s). Air humidity 64–84%, atmospheric pressure 757–760 mm Hg, UV index up to 9.
5 days at a glance — tap a day to open it
Sunrise 05:59
Sunset 17:48
Sunset 17:48
First Quarter58% illuminated
Moonrise 12:39 · Moonset does not set today
Moonrise 12:39 · Moonset does not set today
Chart
Table
Sun, Oct 18, 2026
| Time | Weather | Temperature | Rain chance | Cloud cover | Humidity | Pressure | Wind | UV Index |
|---|---|---|---|---|---|---|---|---|
| 00:00 |  Light rain shower | 28 °C | 73% (1.7 mm/hr) | 100% | 83% | 758 mm Hg | SSE 160° 3.69 (5.22) m/s | 0 |
| 01:00 | Light rain shower | 27 °C | 73% (1.63 mm/hr) | 100% | 84% | 758 mm Hg | S 171° 3.5 (5) m/s | 0 |
| 02:00 | Light rain shower | 28 °C | 64% (0.88 mm/hr) | 100% | 81% | 758 mm Hg | S 172° 3.19 (4.5) m/s | 0 |
| 03:00 |  Moderate or heavy rain shower | 27 °C | 80% (2.86 mm/hr) | 100% | 82% | 758 mm Hg | S 177° 3 (3.72) m/s | 0 |
| 04:00 | Light rain shower | 27 °C | 59% (0.73 mm/hr) | 100% | 79% | 758 mm Hg | S 171° 2.89 (3.53) m/s | 0 |
| 05:00 |  Patchy rain possible | 28 °C | 32% (0.14 mm/hr) | 100% | 77% | 758 mm Hg | S 169° 2.61 (3.22) m/s | 0 |
| 06:00 |  Light drizzle | 28 °C | 39% (0.18 mm/hr) | 100% | 76% | 759 mm Hg | S 174° 2.69 (3.31) m/s | 0 |
| 07:00 |  Light rain shower | 28 °C | 44% (0.41 mm/hr) | 100% | 74% | 760 mm Hg | S 171° 2.69 (3.5) m/s | 0.7 |
| 08:00 | Patchy rain possible | 29 °C | 19% (0.03 mm/hr) | 100% | 69% | 760 mm Hg | S 169° 3.11 (3.83) m/s | 2.3 |
| 09:00 |  Overcast | 30 °C | 16% | 100% | 66% | 760 mm Hg | SSE 167° 3.31 (3.81) m/s | 4.8 |
| 10:00 | Patchy rain possible | 30 °C | 18% (0.04 mm/hr) | 100% | 64% | 760 mm Hg | SSE 155° 3.31 (3.5) m/s | 7.4 |
| 11:00 | Light rain shower | 30 °C | 54% (1 mm/hr) | 92% | 66% | 759 mm Hg | SE 146° 3.61 (7.61) m/s | 9 |
| 12:00 | Light rain shower | 30 °C | 57% (1.19 mm/hr) | 78% | 68% | 758 mm Hg | SE 143° 3.69 (3.72) m/s | 8.9 |
| 13:00 | Light rain shower | 30 °C | 53% (0.97 mm/hr) | 84% | 68% | 758 mm Hg | SE 135° 4 (9) m/s | 7 |
| 14:00 | Patchy rain possible | 30 °C | 21% (0.13 mm/hr) | 74% | 69% | 757 mm Hg | SE 129° 4.39 (8.39) m/s | 4.8 |
| 15:00 | Patchy rain possible | 30 °C | 36% (0.32 mm/hr) | 87% | 69% | 757 mm Hg | ESE 123° 3.81 (6.81) m/s | 2.6 |
| 16:00 | Patchy rain possible | 29 °C | 36% (0.4 mm/hr) | 71% | 70% | 758 mm Hg | ESE 111° 3.31 (7.31) m/s | 0.9 |
| 17:00 | Patchy rain possible | 29 °C | 20% (0.07 mm/hr) | 74% | 73% | 758 mm Hg | E 95° 3.11 (3.42) m/s | 0.1 |
| 18:00 | Patchy rain possible | 29 °C | 24% (0.04 mm/hr) | 100% | 75% | 758 mm Hg | ENE 76° 2.69 (3.14) m/s | 0 |
| 19:00 | Patchy rain possible | 29 °C | 26% (0.06 mm/hr) | 100% | 75% | 759 mm Hg | ENE 58° 2.69 (3.22) m/s | 0 |
| 20:00 |  Cloudy | 29 °C | 18% | 88% | 75% | 760 mm Hg | NE 52° 2.69 (3.31) m/s | 0 |
| 21:00 | Patchy rain possible | 29 °C | 16% (0.01 mm/hr) | 78% | 75% | 760 mm Hg | NE 47° 2.69 (3.33) m/s | 0 |
| 22:00 | Patchy rain possible | 28 °C | 26% (0.12 mm/hr) | 81% | 75% | 760 mm Hg | NE 40° 2.69 (3.33) m/s | 0 |
| 23:00 | Patchy rain possible | 28 °C | 17% (0.02 mm/hr) | 72% | 76% | 759 mm Hg | NE 43° 2.39 (3) m/s | 0 |
Sun, Oct 18, 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.