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
Sunset 18:29
Waxing Crescent24% illuminated
Moonrise 10:07 · Moonset 23:18
Moonrise 10:07 · Moonset 23:18
Chart
Table
Thu, May 21, 2026
| Temperature | Rain chance | Cloud cover | Humidity | Pressure | Wind | UV Index | ||
|---|---|---|---|---|---|---|---|---|
| 00:00 |  Clear | 30 °C | 0% | 4% | 65% | 752 mm Hg | WSW 241° 12 (16.5) m/s | 0 |
| 01:00 | Clear | 29 °C | 0% | 8% | 65% | 751 mm Hg | WSW 246° 10.69 (15.25) m/s | 0 |
| 02:00 | Clear | 30 °C | 0% | 8% | 63% | 751 mm Hg | WSW 253° 9.39 (13.86) m/s | 0 |
| 03:00 | Clear | 31 °C | 0% | 9% | 56% | 751 mm Hg | W 264° 8.81 (13.39) m/s | 0 |
| 04:00 | Clear | 32 °C | 0% | 11% | 52% | 751 mm Hg | W 274° 9.31 (14.17) m/s | 0 |
| 05:00 | Clear | 32 °C | 0% | 9% | 53% | 752 mm Hg | W 272° 7.61 (11.89) m/s | 0 |
| 06:00 |  Sunny | 32 °C | 0% | 6% | 52% | 752 mm Hg | W 263° 6.11 (9.42) m/s | 0.2 |
| 07:00 | Sunny | 33 °C | 0% | 4% | 49% | 753 mm Hg | W 270° 6.89 (10) m/s | 0.9 |
| 08:00 | Sunny | 34 °C | 0% | 4% | 45% | 754 mm Hg | W 278° 7 (10.11) m/s | 1.9 |
| 09:00 | Sunny | 35 °C | 0% | 5% | 42% | 754 mm Hg | WNW 292° 7 (10.22) m/s | 4.7 |
| 10:00 | Sunny | 37 °C | 0% | 4% | 39% | 753 mm Hg | WNW 286° 6.69 (10.08) m/s | 8 |
| 11:00 | Sunny | 38 °C | 0% | 5% | 35% | 752 mm Hg | W 281° 6.19 (9.08) m/s | 9.3 |
| 12:00 | Sunny | 40 °C | 0% | 5% | 33% | 752 mm Hg | WNW 290° 4.89 (7.86) m/s | 10.2 |
| 13:00 | Sunny | 40 °C | 0% | 18% | 34% | 751 mm Hg | NW 323° 3.81 (6.5) m/s | 9 |
| 14:00 | Sunny | 39 °C | 0% | 18% | 40% | 750 mm Hg | NE 36° 0.89 (1.44) m/s | 6.3 |
| 15:00 | Sunny | 37 °C | 0% | 12% | 44% | 750 mm Hg | SE 138° 2.31 (4.08) m/s | 3.7 |
| 16:00 | Sunny | 36 °C | 0% | 10% | 50% | 749 mm Hg | SSE 155° 4.5 (8.22) m/s | 1.5 |
| 17:00 |  Patchy rain possible | 37 °C | 71% (0.01 mm/hr) | 75% | 43% | 750 mm Hg | SSW 206° 5.81 (9.86) m/s | 0.4 |
| 18:00 | Clear | 34 °C | 0% | 12% | 46% | 751 mm Hg | SW 230° 9 (15.58) m/s | 0 |
| 19:00 | Clear | 33 °C | 0% | 11% | 47% | 751 mm Hg | SW 234° 9.81 (16.11) m/s | 0 |
| 20:00 | Clear | 34 °C | 0% | 5% | 45% | 751 mm Hg | WSW 237° 9.31 (16.11) m/s | 0 |
| 21:00 | Clear | 34 °C | 0% | 5% | 44% | 752 mm Hg | WSW 242° 9.81 (15.97) m/s | 0 |
| 22:00 | Clear | 34 °C | 0% | 4% | 46% | 752 mm Hg | WSW 249° 9.39 (15.39) m/s | 0 |
| 23:00 | Clear | 34 °C | 0% | 4% | 48% | 751 mm Hg | WSW 248° 7.69 (13.72) m/s | 0 |
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.