Yes, there is a well known correlation. Think about things like how loss of water would impact your system through sweating. Here is an article that may explain it for you https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4292702/
Hello~Yes, there is a link, heat can cause dehydration if you do not drink enough water, thus, affecting your blood pressure. Cold and cause the arteries to spasm, so again, this can cause a blood pressure issue as well.