Millions across 9 US states told to brace for ‘coldest air of the season’ as Canadian cold blast hits today –Expected temperatures range from 25F to 36F. | 6 Oct 2026 | Meteorologists are warning millions of Americans to prepare for the first widespread frost and freeze of the season. The National Weather Service (NWS) has issued frost advisories and freeze warnings for parts of nine states from late Tuesday into Wednesday morning. AccuWeather meteorologists warned that those living in the Northeast will experience the “coldest air of the season.” The NWS alerts cover areas of Maine, New Hampshire, Vermont, Massachusetts, Rhode Island, Connecticut, New York, New Jersey and Pennsylvania. Most alerts begin at 11pm or midnight, with the latest continuing until 9am Wednesday.