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 70%. Wind up to 10.19 m/s (gusts 13.47 m/s). Air humidity 54–80%, atmospheric pressure 751–755 mm Hg, UV index up to 9.7.
Sunrise 05:43
Sunset 18:28
Sunset 18:28
Waxing Crescent2% illuminated
Moonrise 06:49 · Moonset 20:20
Moonrise 06:49 · Moonset 20:20
Chart
Table
| Temperature | Rain chance | Cloud cover | Humidity | Pressure | Wind | UV Index | ||
|---|---|---|---|---|---|---|---|---|
| 00:00 |  Thundery outbreaks possible | 30 °C | 70% (0.01 mm/hr) | 77% | 75% | 754 mm Hg | SSW 207° 7.39 (10.33) m/s | 0 |
| 01:00 | Thundery outbreaks possible | 30 °C | 100% (0.08 mm/hr) | 83% | 76% | 753 mm Hg | SSW 203° 7.5 (10.28) m/s | 0 |
| 02:00 |  Patchy light rain with thunder | 30 °C | 100% (0.19 mm/hr) | 80% | 77% | 752 mm Hg | SSW 202° 7.19 (9.92) m/s | 0 |
| 03:00 | Thundery outbreaks possible | 30 °C | 0% | 34% | 77% | 752 mm Hg | SSW 202° 7 (9.67) m/s | 0 |
| 04:00 | Thundery outbreaks possible | 29 °C | 0% | 45% | 77% | 752 mm Hg | SSW 199° 7.11 (9.75) m/s | 0 |
| 05:00 | Thundery outbreaks possible | 29 °C | 100% (0.08 mm/hr) | 76% | 77% | 753 mm Hg | SSW 196° 7.11 (9.86) m/s | 0 |
| 06:00 |  Thundery outbreaks possible | 30 °C | 0% | 47% | 76% | 753 mm Hg | SSW 197° 7.31 (9.92) m/s | 0.2 |
| 07:00 | Thundery outbreaks possible | 30 °C | 0% | 45% | 71% | 754 mm Hg | SSW 200° 7.19 (9.42) m/s | 0.8 |
| 08:00 | Thundery outbreaks possible | 32 °C | 0% | 34% | 64% | 755 mm Hg | SSW 201° 6.69 (8.19) m/s | 1.9 |
| 09:00 | Thundery outbreaks possible | 33 °C | 0% | 26% | 61% | 755 mm Hg | SSW 200° 6.31 (7.72) m/s | 3.7 |
| 10:00 | Thundery outbreaks possible | 33 °C | 0% | 26% | 58% | 755 mm Hg | SSW 193° 6 (7.5) m/s | 7.3 |
| 11:00 |  Sunny | 34 °C | 0% | 18% | 57% | 754 mm Hg | S 178° 6.39 (7.97) m/s | 9.7 |
| 12:00 | Sunny | 34 °C | 0% | 16% | 56% | 753 mm Hg | S 171° 7.11 (8.42) m/s | 9.4 |
| 13:00 | Sunny | 35 °C | 0% | 20% | 54% | 752 mm Hg | SSE 163° 8 (9.72) m/s | 8.5 |
| 14:00 | Sunny | 35 °C | 0% | 21% | 54% | 752 mm Hg | SSE 160° 9.19 (11.64) m/s | 5.5 |
| 15:00 | Sunny | 34 °C | 0% | 17% | 59% | 751 mm Hg | SSE 158° 10.19 (13.42) m/s | 2.2 |
| 16:00 | Sunny | 32 °C | 0% | 12% | 68% | 751 mm Hg | SSE 162° 9.89 (12.97) m/s | 0.6 |
| 17:00 | Sunny | 31 °C | 0% | 8% | 73% | 752 mm Hg | SSE 166° 9.39 (12.42) m/s | 0.2 |
| 18:00 |  Clear | 31 °C | 0% | 8% | 79% | 752 mm Hg | SSE 163° 9 (12) m/s | 0 |
| 19:00 | Clear | 31 °C | 0% | 10% | 80% | 752 mm Hg | SSE 164° 9.39 (12.61) m/s | 0 |
| 20:00 | Clear | 30 °C | 0% | 10% | 80% | 753 mm Hg | S 176° 9.89 (13.47) m/s | 0 |
| 21:00 | Clear | 30 °C | 0% | 12% | 80% | 754 mm Hg | S 184° 9.61 (12.97) m/s | 0 |
| 22:00 | Clear | 30 °C | 0% | 11% | 79% | 755 mm Hg | S 188° 9.69 (13.08) m/s | 0 |
| 23:00 | Clear | 30 °C | 0% | 24% | 76% | 755 mm Hg | SSW 195° 8.89 (12.25) m/s | 0 |
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.