Guwahati, June 7: May 2025 marked a month of climatic extremes across India, with the Northeast experiencing a significant shift in rainfall intensity and monsoon advancement, raising both opportunities and concerns for the region. According to the India Meteorological Department’s (IMD) latest climate summary, the East & Northeast India region recorded 242.8 mm of rainfall — 28% above normal — making it the 4th highest in the last 25 years and 29th highest since 1901.
The IMD in its June 7 forecast said light/moderate rainfall at most/many places is likely to continue over northeast India during the next 7 days with isolated heavy rainfall over Arunachal Pradesh, Assam & Meghalaya from June 10-13 and Nagaland, Manipur, Mizoram & Tripura on June 7 and from June 11-13.
Resubelpara in North Garo Hills recorded 9 cm of rainfall in the past 24 hours, while Gharmura in Hailakandi district and Barpathar in Golaghat district of Assam recorded 5 cm of rainfall respectively.
In its climate report for May, the IMD said several districts across Assam and Meghalaya were impacted by extremely heavy rainfall events, with Guwahati setting a new 24-hour rainfall record of 111.4 mm on May 31, surpassing a previous record from 1958. Other Northeast states such as Meghalaya (East Khasi Hills, South West Khasi Hills, East Garo Hills) and Mizoram (Saiha) also reported severe impacts from extreme downpours, as per media-reported damage assessments.
Rainfall over the country as a whole for May 2025 was 126.7 mm, which is 106% more than its Long Period Average (LPA) of 61.4 mm.
Guwahati, Assam, recorded a 24-hour rainfall of 111.4 mm on May 31, breaking its previous record of 96.8 mm set in May 1958.
The Southwest Monsoon’s early onset further reinforced the unusual climate patterns. The monsoon reached Mizoram on May 24 — over a week ahead of schedule — and swept into Tripura, Manipur, Nagaland, Arunachal Pradesh, and parts of Assam and Meghalaya by May 26, marking one of the earliest monsoon arrivals in over a decade.
The IMD also noted that the region experienced 16–23 days of thunderstorm activity, contributing to the 199 lightning-related deaths across the country, including fatalities in Assam. Meanwhile, cooler temperatures prevailed across most of India, with the national average maximum temperature for May being the 7th lowest since 1901, a trend attributed to frequent thunderstorms and Western Disturbances.
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