Volcanic activity caused that summer IIRC.
39 here this morning. Very cold for almost May.
The Year Without a Summer (also known as the Poverty Year, The Summer that Never Was, Year There Was No Summer and Eighteen Hundred and Froze to Death[1]) was 1816, in which severe summer climate abnormalities caused average global temperatures to decrease by 0.4–0.7 °C (0.7–1.3 °F),[2] resulting in major food shortages across the Northern Hemisphere.[3][4] It is believed that the anomaly was caused by a combination of a historic low in solar activity with a volcanic winter event, the latter caused by a succession of major volcanic eruptions capped by the 1815 eruption of Mount Tambora, in the Dutch East Indies (Indonesia), the largest known eruption in over 1,300 years, which occurred during the concluding decades of the Little Ice Age, potentially adding to the existing cooling that had been periodically ongoing since 1350 AD
Yes that's what the link said that I posted.
