There was an amazing temperature drop at the end of August 1869.

Leicester recorded a maximum of 35C on the 28th and a minimum of -0.5C on 31st.

I'm sceptical about those readings but Skipton recorded 32.8C on the 29th and -1.1C on the 31st

So it would seem that it went from intense late summer heat to early winter morning chill within a couple of days. Must have been shock for agriculturalists bring in the harvest!

Other readings

Camden Square: 31.7C on 28th; 5.6C on 31st
Banbury: 29.4C on 27th; 0.6C on 31st
Orleton: 31.9C on 28th; -0.4C on 31st
Derby: 30.0C on 28th; 2.2C on 31st
Castle Toward: 26.1C on 28th; -1.7C on 30th
Stirling: 26.6C on 28th; -3.5C on 30th
Doo Castle: 27.2C on 28th; -1.7C on 31st

Some detail info
Culford
28th max: 28.3C
29th max: 16.1C
30th min: 0.6C ice observed on grass

Cirencester
28th max: 28.9C
29th max. 15.6C
31st: ice observed on grass

Bideford
28th
Max: 30.3C
Min: 18.1C
29th
Max: 21.1C
Min: 17.2C
30th
Max: 18.6C
Min: 12.8C

Ripon
28th Max: 31.2C
29th Max: 11.1C

Killaloe
28th Max: 30.0C
29th Max: 13.3C

Reports say that the wind swung into the NE and this brought cloud but nor rain. It could be similiar to what happen on the 30th June 1995 when there was a remarkable drop in temperature during that afternoon and evening.

What makes this more remarkable is that temperatures of 30C were being recorded and a couple of days later, an air frost was observed.

Originally Posted by: KevBrads1