Come on this is England we're talking about we can have different weather in the same street :) I'd have no problem believing it was raining in LOCATION2 but sunny in LOCATION1 (or vice versa) That said  I bet that 'on average' yeah the weather would be the same 90% of the time, as you say they're NOT that far away from each other  The geographical distinction of whether you are in Essex or London makes no difference to the weather