The hottest 12 months

I read yesteday that January-March this year is the hottest January March ever recorded.

Combined with last year's record heat, this makes the last year (April 2014 - March 2015) the hottest 12 month period on record. It beat the 12 months ending in February, which beat the 12 months ending in January

Coincidentally I met up with a couple of good friends last night, and one mentioned how long this summer has been.

The year to year temperature increase is probably not noticeable. But after a while it adds up, and it is noticeable when there are several 30°C days in the middle of Autumn.