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Lucknow, the capital of Uttar Pradesh, sits on the Gomti River in the heart of the Indo-Gangetic plain in north-central India, at approximately 26.85°N, 80.95°E. It has a humid subtropical climate with dry winters (Köppen Cwa) — with scorching pre-monsoon summers, a wet monsoon delivering most of the year's rain, and cool, foggy winters typical of the plain.
Summer, from April to June, is extremely hot and dry, with May and June the hottest — highs regularly reaching 40–45°C, occasionally higher — with humidity around 20% and hot, dust-laden winds. The monsoon then arrives in late June and lasts through September, accounting for around 85% of the year's rainfall, bringing heavy downpours, high humidity and a drop in temperature.
Winter, from November to February, is cool and dry, with January the coolest month — highs around 23–24°C but mornings that can drop to 3–4°C, and on record occasions to freezing. Dense fog frequently shrouds the plain in the early morning, disrupting transport, and severe air pollution settles over the city during the still, cool months.
Lucknow receives around 900–1,000 mm of rain a year, with the southwest monsoon between July and September delivering the overwhelming majority — around 85% of the annual total — while the rest of the year is very dry; the Bay of Bengal branch of the monsoon is its main source. Live rainfall, humidity, and pressure readings for the city are shown in the panels above.
Lucknow's climate is that of the Indo-Gangetic plain in concentrated form: temperatures can swing from near 0°C on a January morning to above 45°C in May, with practically all the rain compressed into three monsoon months. Winter fog and the severe seasonal air pollution that accompanies it are among the region's most persistent problems.
To follow any single measurement in Lucknow more closely, use our live instruments: the online barometer for atmospheric pressure, the thermometer for temperature, the hygrometer for humidity, the anemometer for wind speed, the wind vane for wind direction, and the rain gauge for rainfall.