Weather in Chennai on 18 December 2026
Preliminary outlook for 18 December 2026
A preliminary estimate based on the 2019–2025 archive: daytime around +27°C and nighttime around +24°C, average precipitation 1.9 mm, wind around 5 m/s, humidity around 75%.
This is a climate-based estimate, not a precise long-range forecast. It is replaced by hourly data when the date enters the forecast window.
+24°C
Weather archive — latest year: 2025
Clear/Sunny
Weather archive — latest year: 2025
Nighttime: +22°C
Precipitation: 0 mm
Wind: 4 — 5 m/s
Humidity: 69%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +27°C | Sun hours | 11 h |
| UV index | 6 | Cloud cover (avg.) | 7% |
| Pressure (avg.) | 761 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +26°C | Dew point (avg.) | +18°C |
| Heat index (avg.) | +26°C | Wind chill (avg.) | +24°C |
| Wind gusts (max.) | 7 m/s | Wind direction (avg.) | 29° ↗ (NE) |
Sunrise
06:24
Duration
11 h 22 min
Sunset
17:46
Moonrise
04:48
Moonset
16:18
Moon phase
Waning Crescent
Illumination
1%
+23°C
Weather archive — for 2024 year
Moderate or heavy rain shower
Weather archive — for 2024 year
Nighttime: +20°C
Precipitation: 12.2 mm
Wind: 7 — 7 m/s
Humidity: 83%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +24°C | Sun hours | 1 h |
| UV index | 5 | Cloud cover (avg.) | 100% |
| Pressure (avg.) | 757 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 7 km | Sea temperature | — |
| Feels like (avg.) | +25°C | Dew point (avg.) | +20°C |
| Heat index (avg.) | +25°C | Wind chill (avg.) | +23°C |
| Wind gusts (max.) | 13 m/s | Wind direction (avg.) | 331° ↖ (NW) |
Sunrise
06:25
Duration
11 h 22 min
Sunset
17:47
Moonrise
20:45
Moonset
09:05
Moon phase
Waning Gibbous
Illumination
79%
+26°C
Weather archive — for 2023 year
Patchy rain nearby
Weather archive — for 2023 year
Nighttime: +25°C
Precipitation: 0.2 mm
Wind: 6 — 7 m/s
Humidity: 70%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +27°C | Sun hours | 5 h |
| UV index | 6 | Cloud cover (avg.) | 80% |
| Pressure (avg.) | 761 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +28°C | Dew point (avg.) | +20°C |
| Heat index (avg.) | +28°C | Wind chill (avg.) | +26°C |
| Wind gusts (max.) | 10 m/s | Wind direction (avg.) | 55° ↗ (NE) |
Sunrise
06:24
Duration
11 h 22 min
Sunset
17:46
Moonrise
11:11
Moonset
23:13
Moon phase
Waxing Crescent
Illumination
37%
+26°C
Weather archive — for 2022 year
Cloudy
Weather archive — for 2022 year
Nighttime: +25°C
Precipitation: 0.2 mm
Wind: 5 — 7 m/s
Humidity: 76%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +27°C | Sun hours | 7 h |
| UV index | 7 | Cloud cover (avg.) | 64% |
| Pressure (avg.) | 758 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +28°C | Dew point (avg.) | +21°C |
| Heat index (avg.) | +28°C | Wind chill (avg.) | +26°C |
| Wind gusts (max.) | 11 m/s | Wind direction (avg.) | 41° ↗ (NE) |
Sunrise
06:24
Duration
11 h 22 min
Sunset
17:46
Moonrise
01:17
Moonset
13:30
Moon phase
Waning Crescent
Illumination
26%
+26°C
Weather archive — for 2021 year
Partly Cloudy
Weather archive — for 2021 year
Nighttime: +23°C
Precipitation: 0 mm
Wind: 5 — 6 m/s
Humidity: 69%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +29°C | Sun hours | 11 h |
| UV index | 7 | Cloud cover (avg.) | 34% |
| Pressure (avg.) | 761 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +27°C | Dew point (avg.) | +19°C |
| Heat index (avg.) | +27°C | Wind chill (avg.) | +25°C |
| Wind gusts (max.) | 9 m/s | Wind direction (avg.) | 24° ↑ (NNE) |
Sunrise
06:24
Duration
11 h 22 min
Sunset
17:46
Moonrise
17:08
Moonset
05:32
Moon phase
Waxing Gibbous
Illumination
97%
+26°C
Weather archive — for 2020 year
Patchy rain nearby
Weather archive — for 2020 year
Nighttime: +25°C
Precipitation: 0.1 mm
Wind: 5 — 7 m/s
Humidity: 78%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +27°C | Sun hours | 11 h |
| UV index | 6 | Cloud cover (avg.) | 75% |
| Pressure (avg.) | 760 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +29°C | Dew point (avg.) | +22°C |
| Heat index (avg.) | +29°C | Wind chill (avg.) | +26°C |
| Wind gusts (max.) | 11 m/s | Wind direction (avg.) | 37° ↗ (NE) |
Sunrise
06:25
Duration
11 h 22 min
Sunset
17:47
Moonrise
09:45
Moonset
21:30
Moon phase
Waxing Crescent
Illumination
20%
+26°C
Weather archive — for 2019 year
Patchy rain nearby
Weather archive — for 2019 year
Nighttime: +25°C
Precipitation: 0.3 mm
Wind: 5 — 6 m/s
Humidity: 78%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +28°C | Sun hours | 2 h |
| UV index | 7 | Cloud cover (avg.) | 72% |
| Pressure (avg.) | 761 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 9 km | Sea temperature | — |
| Feels like (avg.) | +28°C | Dew point (avg.) | +22°C |
| Heat index (avg.) | +28°C | Wind chill (avg.) | +26°C |
| Wind gusts (max.) | 10 m/s | Wind direction (avg.) | 41° ↗ (NE) |
Sunrise
06:24
Duration
11 h 22 min
Sunset
17:46
Moonrise
23:47
Moonset
11:39
Moon phase
Last Quarter
Illumination
50%
Weather in Chennai on 18 December in previous years
| Year | Day | Nighttime | Average | Sun | UV | Humidity | Wind |
|---|---|---|---|---|---|---|---|
| 2025 |
+27°C
|
+22°C
|
+24°C | 11 h | 6 | 69% | 4 — 5 m/s |
| 2024 |
+24°C
|
+20°C
|
+23°C | 1 h | 5 | 83% | 7 — 7 m/s |
| 2023 |
+27°C
|
+25°C
|
+26°C | 5 h | 6 | 70% | 6 — 7 m/s |
| 2022 |
+27°C
|
+25°C
|
+26°C | 7 h | 7 | 76% | 5 — 7 m/s |
| 2021 |
+29°C
|
+23°C
|
+26°C | 11 h | 7 | 69% | 5 — 6 m/s |
| 2020 |
+27°C
|
+25°C
|
+26°C | 11 h | 6 | 78% | 5 — 7 m/s |
| 2019 |
+28°C
|
+25°C
|
+26°C | 2 h | 7 | 78% | 5 — 6 m/s |