5-day weather forecast Chennai 18-08-2026
Weather forecast Chennai Tuesday, August 18 18.08.2026: partly cloudy, temperature from 28 °C to 33 °C.
Precipitation probability 51%. Wind up to 6.69 m/s (gusts 9.5 m/s). Air humidity 47–73%, atmospheric pressure 755–758 mm Hg, UV index up to 11.5.
5 days at a glance — tap a day to open it
Sunrise 05:56
Sunset 18:28
Sunset 18:28
First Quarter37% illuminated
Moonrise 10:47 · Moonset 22:33
Moonrise 10:47 · Moonset 22:33
Chart
Table
Tue, Aug 18, 2026
| Temperature | Rain chance | Cloud cover | Humidity | Pressure | Wind | UV Index | ||
|---|---|---|---|---|---|---|---|---|
| 00:00 |  Light drizzle | 29 °C | 51% (0.59 mm/hr) | 75% | 73% | 757 mm Hg | SSW 196° 5.31 (7.89) m/s | 0 |
| 01:00 |  Patchy light drizzle | 29 °C | 50% (0.71 mm/hr) | 80% | 72% | 756 mm Hg | SSW 204° 5.11 (7.5) m/s | 0 |
| 02:00 |  Patchy rain possible | 29 °C | 36% (0.35 mm/hr) | 79% | 72% | 756 mm Hg | SSW 207° 4.31 (6.58) m/s | 0 |
| 03:00 | Patchy light drizzle | 29 °C | 40% (0.42 mm/hr) | 77% | 72% | 756 mm Hg | SSW 207° 4.5 (6.86) m/s | 0 |
| 04:00 | Patchy rain possible | 28 °C | 51% (0.81 mm/hr) | 79% | 73% | 756 mm Hg | SW 217° 3.69 (5.81) m/s | 0 |
| 05:00 | Patchy rain possible | 28 °C | 39% (0.41 mm/hr) | 78% | 73% | 757 mm Hg | SW 236° 2.81 (4.44) m/s | 0 |
| 06:00 |  Sunny | 29 °C | 6% | 25% | 64% | 756 mm Hg | W 268° 2.81 (4.64) m/s | 0.2 |
| 07:00 |  Partly cloudy | 30 °C | 4% | 27% | 57% | 757 mm Hg | WNW 285° 3.31 (4.75) m/s | 1 |
| 08:00 |  Patchy rain possible | 31 °C | 10% (0.01 mm/hr) | 72% | 60% | 758 mm Hg | WNW 293° 2.11 (2.83) m/s | 2.9 |
| 09:00 | Sunny | 32 °C | 3% | 16% | 51% | 758 mm Hg | NW 314° 2.11 (2.81) m/s | 6.2 |
| 10:00 | Sunny | 33 °C | 2% | 18% | 47% | 758 mm Hg | N 8° 1.61 (2.06) m/s | 9.4 |
| 11:00 | Partly cloudy | 32 °C | 4% | 32% | 53% | 758 mm Hg | E 83° 2.81 (3.56) m/s | 11.5 |
| 12:00 | Partly cloudy | 33 °C | 3% | 25% | 49% | 756 mm Hg | E 82° 4.89 (6.5) m/s | 11.3 |
| 13:00 | Partly cloudy | 32 °C | 5% | 44% | 54% | 755 mm Hg | E 98° 6.5 (9.5) m/s | 6.8 |
| 14:00 | Partly cloudy | 32 °C | 4% | 30% | 57% | 755 mm Hg | ESE 104° 6.69 (9) m/s | 3.3 |
| 15:00 | Partly cloudy | 31 °C | 7% | 50% | 61% | 755 mm Hg | SE 129° 6 (8.22) m/s | 1.9 |
| 16:00 | Partly cloudy | 30 °C | 7% | 44% | 65% | 755 mm Hg | SSE 154° 6.39 (8.53) m/s | 0.8 |
| 17:00 | Partly cloudy | 30 °C | 8% | 47% | 66% | 755 mm Hg | SSE 148° 5.69 (8.11) m/s | 0.2 |
| 18:00 |  Clear | 30 °C | 7% | 39% | 67% | 756 mm Hg | SSE 157° 5.39 (7.81) m/s | 0 |
| 19:00 |  Partly cloudy | 30 °C | 7% | 31% | 68% | 756 mm Hg | SSE 166° 5 (7.5) m/s | 0 |
| 20:00 | Clear | 29 °C | 7% | 23% | 69% | 757 mm Hg | S 174° 4.69 (7.14) m/s | 0 |
| 21:00 | Partly cloudy | 29 °C | 7% | 32% | 69% | 757 mm Hg | S 184° 4.19 (6.39) m/s | 0 |
| 22:00 | Clear | 29 °C | 8% | 42% | 69% | 758 mm Hg | SSW 194° 3.69 (5.69) m/s | 0 |
| 23:00 | Partly cloudy | 29 °C | 9% | 51% | 69% | 758 mm Hg | SSW 204° 3.19 (4.94) m/s | 0 |
Tue, Aug 18, 2026
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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.