On each of these days, it was so unusually warm that some Concord residents would have struggled to cool down even in the middle of the night, putting them at significantly higher risk of heat-related illnesses.
July
August
July (7-year moving average)
August (7-year moving average)
Number of extreme heat days per month
Number of extreme heat days per month
The summer of 1975 included some of the hottest temperatures ever seen in New England
