By Team INVC | INVC NEWS
NEW DELHI, India | September 17, 2026 —
Weather Today September 17, 2026 remains active across large parts of India as the monsoon delivers another round of rain, thunderstorms and lightning before its expected withdrawal from northwest India. The India Meteorological Department has issued weather warnings for several regions, while Delhi-NCR could see cloudy skies, light rain or drizzle during the day.
In Delhi, the IMD has flagged thunderstorm and lightning activity for September 17. Its local forecast for parts of New Delhi shows a generally cloudy sky with light rain or drizzle and maximum temperatures around 31°C to 34°C, depending on the station.
Meanwhile, heavier rain remains a concern in parts of eastern, northeastern and southern India.
Delhi-NCR Weather Today: Clouds, Rain and Thunderstorm Risk
Delhi-NCR residents should keep an umbrella handy today.
The IMD forecast for New Delhi-Ridge indicates a minimum temperature near 23°C and a maximum around 33°C, along with generally cloudy skies and light rain or drizzle. New Delhi-Narela could reach around 34°C.
The wider Haryana-Chandigarh-Delhi meteorological subdivision also carries a thunderstorm and lightning warning for Thursday.
Humidity could remain noticeable, particularly during the morning and after any rain spell.
Commuters should watch for short periods of reduced visibility, wet roads and localized traffic disruption if showers become intense.
Bihar Faces Heavy Rain and Thunderstorm Warning
Bihar stands among the regions receiving a stronger warning today.
The IMD’s Patna Meteorological Centre has issued a heavy rain as well as thunderstorm and lightning warning for September 17. The warning continues into September 18 before conditions are currently expected to ease.
Residents in vulnerable areas should remain alert to waterlogging, lightning and sudden intense showers.
Heavy Rain Warning for West Bengal and Sikkim
Sub-Himalayan West Bengal and Sikkim also face a heavy-rain warning today.
The IMD’s Kolkata regional warning shows heavy rain for the subdivision on September 17. Gangetic West Bengal, meanwhile, carries a thunderstorm and lightning warning.
Mountain and foothill areas can become particularly sensitive to intense rainfall because slippery roads and localized landslides may disrupt travel.
Assam and Meghalaya Could See Heavy Showers
Rain remains active across parts of the Northeast.
The IMD forecast issued for Assam and Meghalaya lists heavy rain along with thunderstorm and lightning activity for September 17. The region had also faced a very-heavy-rain warning for the preceding day.
People planning road travel should monitor local forecasts because rainfall intensity can vary sharply from one district to another.
Tamil Nadu Rain Alert Continues
Tamil Nadu and Puducherry remain another important weather focus.
The IMD’s Chennai regional forecast carries a heavy-rain and thunderstorm warning for September 17 and indicates continuing rain risks over the coming days.
Localized thunderstorms may bring lightning and sudden heavy downpours even where the day starts relatively dry.
Karnataka: Thunderstorms and Strong Surface Winds
Parts of Karnataka could experience another unsettled day.
North Interior Karnataka and South Interior Karnataka carry warnings for thunderstorms, lightning and strong surface winds on September 17. The forecast also indicates the possibility of heavier rainfall returning to parts of South Interior Karnataka from September 19.
Bengaluru recently experienced significant rain and waterlogging, while the broader forecast keeps showers in play across Karnataka through the coming days.
Andhra Pradesh Also Faces Thunderstorm Risk
Coastal Andhra Pradesh and Rayalaseema remain under thunderstorm, lightning and strong-wind warnings today.
IMD forecasts indicate that heavier rainfall could develop in Coastal Andhra Pradesh from September 19 as the weather system evolves.
Drivers and people working outdoors should remain cautious during lightning or sudden gusty winds.
Gujarat Weather: Thunderstorms Remain Possible
The Gujarat Region and Saurashtra-Kutch carry warnings for thunderstorm and lightning activity on September 17.
Similar conditions may continue in parts of the state on September 18 before the warning pattern eases.
Is the Monsoon About to Withdraw?
The southwest monsoon is approaching its seasonal withdrawal phase, but rain has not finished yet.
The IMD has indicated that conditions may become favorable for the withdrawal of the southwest monsoon from parts of northwest India around September 19, slightly later than the normal September 17 date. However, active weather systems can still generate thunderstorms and rain before the retreat begins.
That transition makes the next few days particularly important for north and northwest India.
What People Should Watch Today
People in areas under thunderstorm warnings should avoid exposed open spaces during lightning, stay away from unstable structures and trees during strong winds, and monitor district-level IMD updates.
Motorists should reduce speed during heavy rain and avoid entering deeply waterlogged roads.
Weather conditions can also change quickly during the monsoon transition. Therefore, city-level and district-level alerts remain more useful than relying only on a broad state forecast.
For Delhi-NCR, the key message today is cloudy weather, possible light rain or drizzle and thunderstorm risk, rather than continuous heavy rainfall.
For parts of Bihar, Assam-Meghalaya, Sub-Himalayan West Bengal-Sikkim and Tamil Nadu, the rainfall warning is more significant.
