There was a short heatwave from the 19th to the 21st of June 1936, when maxima got into the 30s. 31.7°C on the 20th and 21st being the highest record. The heatwave did not last long though as it turned into an increasingly thundery breakdown with heavy thunderstorms breaking out over many western and southern areas.
South Farnborough: a storm occurred on the 20th of June from 2.05pm to 2.25pm. 30mp squalls reported and the thermometer fell from 85.5F to 70.0F in 28 minutes. A second storm from 9.10pm to 10.20pm with 48mph gusts. Cherry sized hail fell
Hailsham: 2.2" of rain on the 19th
Wigan: 2.11" of rain on the 22nd
The far north of Scotland escaped with Lerwick recording 17.3hrs of sunshine on the 21st.
Bit of an odd summer 1936 was.
July was a total washout, the wettest since 1888 and yet August was the driest since 1818 for England and Wales.
Summer CETwise, it was unremarkable with 15.4°C