As per the official website of the Met department the hottest days in the month of June in the past few years have been as follows. lucknow recorded a maximum temperature of 38.7 degree celcius ( June 5, 2013) , 45.4 (June 14 2012), 42 (June 5 2011), 43.8 (June 1 2010), 44.8 degree celcius (June 22 2009), 40 (June 2 2008), 44.6 (June 3 2007), 41 (June 13 2006), 46.1 (June 20 2005) and 41.2 (June 8 2004)