The capital Delhi recorded a maximum temperature of 31.5 degrees celsius, three less than normal while the minimum was recorded at 26.5 degrees celsius.
The city received a total of 2.2 mm of rainfall.
In Uttar Pradesh, three people died after being struck by lightning in Azamgarh, two people each died in Firozabad, Barabanki, Ambedkarnagar and Lakhimpur and one each in Bhadohi and Sultanpur in other rain-related incidents, including house collapse.
Met office sources here said heavy rain and thundershowers occurred across the state.
The Met office has forecast heavy to very heavy rainfall at one or two places over the state during the next 48 hours.
Central Water Commission sources said that Sharda and Ghaghra were in spate and flowing above the red mark at Palia Kalan, Elgin Bridge, Ayodhya and Turtipar while Ganga was flowing above the danger mark at Ballia.
A report from Barabanki said that about half-a-dozen villages around the Charsandi embankment were submerged in the water and administration was shifting the people to safer places.