Tucson: first 100°F day happens earlier
The first day temperature goes over 100 °F at Tucson Airport each year is falling about 1 day earlier per decade.
Plot of first 100°F in Tucson
- PPT slides from Deborah Hughes-Hallett
- Sample problem statements and solutions from Deborah Hughes-Hallett
- Spreadsheet data.
Source
The original source for the data is no longer available (a NOAA site accessed on 2022). An alternate source is this weather.gov site, or this Pima County Public Library site. Note: the linear fit may give different numbers to the ones in the graph above.