Go to weather.com, search for any city and then click on 10 day forecast. (10 day Forecast for Disney World)
Open Excel and select new workbook. Starting with the second row, one cell over, type "Day 1" then tab to the next cell and type "Day 2". Continue adding until "Day 10".
In the 1st cell on the 3rd row type "High" then press the down arrow on the keyboard and type "Low".
Using the weather. com website fill out the highs and lows for the city selected. Once complete select all the cells containing information.
Click the Insert tab and select line chart. After the chart has been inserted you can resize and move it. Be sure to change the chart title by double clicking on the words "chart title".