30s would be unprecedented. The coldest May high at PIT is 40, on 5/9/1966 (by far the snowiest May day on record here at 3.1”) and on 5/9/1923 (the third snowiest May day on record at 0.7”). I think I mentioned this back in 2021, but five of the 10 coldest May highs in Pittsburgh occurred on the 9th, including 2020 and 2021. Odd quirk.