Thank you. After some other posts I recalled that and was reading about it. Tambora was 10 times more powerful than Krakatoa! Although I did see references to “the year without summer” for Krakatoa as well. (I think for both of them it was several years of noticeable lower temperatures).
The more recent Mt. Pinatubo eruption that closed down our military base in the Philippines also probably caused slightly lower temperatures the following summer (like 1 degree).