Daily weather observations at the University of Reading date back to 1908. Here are a selection of news stories and observations for Reading since they began - with one or two earlier, newsworthy, items. They will be updated each day. Let me know if you have any other snippets of news/information.

Any mention of a record refers to observations at the University of Reading - elsewhere in the United Kingdom values may have been higher or lower.

In Reading on 15 July in ...

The equal lowest July dew point at 0900 GMT - with dry air the value was just 2 C. Reading lay on the edge of a pool of cool air over the North Sea.
A series of heavy overnight thunderstorms (15/16 July) gave 35.1 mm of rainfall, almost half of the total fall during summer 1976 - in less than 4 hours.
The first of 12 consecutive days, each of which reached 25 C or above. This was also a mainly dry and sunny period.
The first day of an 8-day spell with each day having at least 9 h of sunshine. The dry spell ended with a thunderstorm early on the 23rd.
The first of 15 consecutive days, each of which reached at least 25 C. This was the warmest July at Whiteknights during 1968-2013.

Some historical data/observations for anniversary dates can be found here