[sinanju]

I wonder how cold it got during the Year of the Volcano (Tambora—1816).

[BIGLOOK]

We'll never know. Perhaps some tree ring evidence might shed some light but even that is unlikely since most of the flora in SE Asia wouldn't survive the three hundred year time span. Nor does any record exist of the prevailing wind patterns exist. It's effects were believed global and noted as 'The Year without Summer' but did that also include the Southern Hemisphere? The April 1815 eruption would have occurred during the Southern Hemisphere's autumnal season.

There are no records of tax increases in the American colonies to allay or offset the effects of the global climate change either.