Table 3. Top 10 ACIS stations with the highest number of days at or above a CSI 2 during November 2025. We analyzed 191 Applied Climate Information System (ACIS) stations associated with U.S. cities.

The Climate Shift Index (CSI), Climate Central’s daily temperature attribution system, applies the latest peer-reviewed methodology to map the influence of climate change on temperatures across the ...

Meteorological winter (December, January, February) is the fastest-warming season for most of the U.S. Locations across the Northeast and the Great Lakes region have seen some of the highest rates of ...

Climate Central created Climate Change: Key Facts, a free slide deck available in English and Spanish, using our library of Climate Matters content — all of which is reviewed by staff scientists in ...