Rain Alert: Big Temperature Drop for Delhi, UP & Bihar

New Delhi | April 30, 2026 — Millions across Northern and Eastern India are breathing a sigh of relief as the India Meteorological Department (IMD) has issued a significant weather update, predicting widespread rain, thunderstorms, and a welcome dip in temperatures. After a week of intense pre-monsoon heat, parts of Delhi-NCR, Uttar Pradesh, and Bihar are expected to see moderate rainfall over the next 48 hours, with weather systems likely to impact as many as 18 states in total.

The Forecast: Rain and Thunderstorms on the Horizon

According to the latest bulletin from the IMD, a new Western Disturbance is currently active over the hilly regions of Northwest India. This atmospheric system, combined with a cyclonic circulation over the plains, is set to break the current heatwave spell.

For residents of Delhi and the National Capital Region (NCR), the sky is expected to turn cloudy by late evening, with light to moderate showers accompanied by gusty winds reaching speeds of 30–50 km/h. Similar conditions are forecast for Uttar Pradesh and Bihar, where the intensity of thunderstorms might be higher, posing a risk of lightning and localized thundersqualls.

States Under Alert

The IMD has extended its rainfall and thunderstorm warning to approximately 18 states and Union Territories. The regions expected to see a significant change in weather include:

• North & Northwest: Delhi, Punjab, Haryana, Rajasthan, and Uttar Pradesh.
• East: Bihar, Jharkhand, Odisha, and West Bengal.
• Northeast: Assam, Meghalaya, Arunachal Pradesh, Nagaland, Manipur, Mizoram, and Tripura.
• South: Parts of Karnataka, Kerala, and Tamil Nadu.

In the northeastern states, particularly Assam and Meghalaya, the alert is more severe, with “heavy to very heavy” rainfall predicted for the next three days.

Temperature Dip: Relief from the 45°C Mark

The most anticipated part of this forecast is the projected fall in temperatures. Over the last 48 hours, several stations in West Uttar Pradesh and Rajasthan recorded maximum temperatures exceeding 45°C—with Banda (UP) recently hitting a peak of 45.8°C.

The IMD predicts that as the rain and wind move in, maximum temperatures could drop by 2–4°C across Central and Northwest India.

• Delhi-NCR: Expected to see the mercury settle around 37°C–38°C, down from the 41°C range.
• Maharashtra & Gujarat: A gradual fall of 2–3°C is likely by May 1st.
• East India: Bihar and West Bengal will see a similar cooling effect due to persistent cloud cover and moisture.

Impact on Agriculture and Daily Life

While the rain brings relief from the heat, the IMD has also issued a yellow alert for farmers. Thunderstorms and gusty winds can damage standing crops and horticulture. In Jharkhand and Interior Karnataka, there is a specific warning for hailstorms, which could impact fruit orchards.

Safety Recommendations for Citizens:

1. Stay Indoors during Lightning: If you hear thunder, seek shelter immediately. Avoid standing under trees or near metal structures.
2. Travel Precautions: High wind speeds (up to 60 km/h in some pockets) may lead to dust storms, reducing visibility on highways. Commuters in UP and Bihar are advised to check weather updates before long-distance travel.
3. Hydration: Despite the temperature drop, humidity levels are expected to rise. Continue to drink plenty of fluids.

Why Is This Happening Now?

Meteorologists explain that this weather shift is typical of the pre-monsoon season, though the current intensity is driven by the interaction of moist winds from the Bay of Bengal meeting the dry, hot air over the Indian landmass.

The IMD’s morning bulletin also noted that while the plains deal with rain, the higher reaches of Jammu & Kashmir, Himachal Pradesh, and Uttarakhand might experience light snowfall or sleet, further cooling the winds that blow down into the northern plains.

The Outlook for May

Looking ahead, the IMD suggests that this wet spell will last until May 5, 2026, for most of East and Northeast India. While Northwest India may see a temporary rise in temperatures again after May 2nd, the current “break” in the heatwave provides a much-needed window for the power grid and water resources to stabilize after a demanding April.

For now, residents in Delhi, UP, and Bihar should keep their umbrellas handy and prepare for a cooler, albeit windier, start to the month of May.