There is now the facility to view the latest Rainham weather via the Rainham History site. The sensor was commissioned on 27 December 2011 so data starts from that point onwards and will show max/min and averages going forward.
The weather information that is shown for Rainham Kent is:
Wind Speed and Wind bearing/direction
Air pressure / barometer readings (current and air pressure trends)
Rainfall (Today and this month/this year)
Although the weather station is situated fairly centrally in Rainham, it should also give a pretty accurate approximation for the weather in Gillingham, Parkwood, Wigmore, Hempstead, Bredhurst, Upchurch and Hartlip.