No surprise for Northeast residents sweating out the summer after a winter barely touching their snow shovels: this is the hottest year on record in the region so far. The Northeast Regional Climate Center at Cornell University reported Tuesday that the average temperature in the 12-state region was 49.9 degrees from January through July. That’s the warmest seven-month period since 1895, the year systematic record keeping began. The second-warmest comparable period was 1921, when the seven-month average was 49.2 degrees.