Only the info on Wikipedia but not sure on it's accuracy as the references don't seem to work for Manchester.
Getting weather data is hard work. The Met Office website should have far more information available.
Did there used to be a Manchester weather centre ?
EDIT the best I can do is: try Weatheronline and the history section , records for Manchester go way back, but you have to read off the graph. I assume August 3rd 1990 was the highest temp at Manchester Airport at 34.x
Yes Manchester did used to have a weather centre, situated in Stockport town centre. Obviously long gone now.
I have to be honest, for this part of the country, there seems to be a distinct lack of easy to reach, historical weather data. Woodford (situated in the borough of Stockport) is fairly representative of the city but a known frost hollow and is no longer in use.
Rostherne is a brand new station so has no historical records and is too far out of the city to be representative. Manchester Airport is still in use, but is not an official Met Office station as far as I know? Data is available but isn’t especially easy to decipher. Manchester Uni isn’t accurate enough.
Overall it has been a fascinating and exceptional day. The heat in the city has been absolutely incredible - there are a few unofficial stations within the UHI of Manchester which have recorded 34 or 35C today and I can well believe they are accurate.
Incredible and not to be forgotten for a long time.
Manchester City Centre, 31m ASL