Kerala’s Onam celebrations are approaching, but those travelling to the state or living in rain-affected areas may need to keep an eye on the weather.

With Thiruvonam falling on Wednesday (August 26), the India Meteorological Department (IMD) has forecast isolated spells of rain across parts of Kerala in the days ahead. As of now, light to moderate rain is expected on Thiruvonam, though the forecast could change if the weather pattern shifts.

Rain forecast ahead of Thiruvonam

In its updated five-day forecast issued on Sunday (August 23) afternoon, the IMD placed several districts under yellow alert for isolated heavy rainfall.

On Sunday (August 23), yellow alert is in force in Pathanamthitta, Idukki, Kozhikode, Wayanad, Kannur and Kasaragod.

On Monday (August 24), the alert covers Pathanamthitta, Kottayam, Idukki, Ernakulam and Thrissur.

For Tuesday (August 25), yellow alert has been issued for Kottayam, Idukki and Ernakulam.

The forecast does not indicate continuous rain across the state. Instead, isolated spells are expected in different areas, meaning weather conditions can vary considerably even between nearby locations.

What travellers should keep in mind

Those planning to travel to Kerala for Onam can expect the possibility of rain during the journey and in the days immediately before Thiruvonam, particularly in the yellow-alert districts.

Travellers heading to or through the affected areas should monitor the latest weather updates before setting out. Those with plans involving hilly or rain-prone areas may also need to be particularly alert to changing local conditions.

Thiruvonam weather outlook

As of now, Wednesday (August 26) is expected to see light to moderate rainfall, with rainfall amounts of 2.5 mm to 64.4 mm forecast.

This means Onam celebrations are not currently expected to face widespread heavy rain across Kerala. However, isolated showers could still occur in different parts of the state.

Fresh alerts possible

The IMD has said its forecast is subject to change depending on weather conditions. Fresh alerts could therefore be issued if the weather pattern changes in the coming days.

The yellow alert indicates the possibility of isolated heavy rain. The IMD defines heavy rainfall as 64.5 mm to 115.5 mm in 24 hours.

For residents in the affected districts, particularly those in areas that have already experienced heavy rain, keeping track of updated alerts will be important as Thiruvonam approaches.