Without any information about what data you have or how it is organized, its pretty hard to give you good suggestions.
One way would be to have all the monthly data in one worksheet and then on another worksheet have this week's dates and a lookup function returning the results for this week, using the month's data on the other sheet.
If Sheet1 contains dates in column D, from row 5 to row 35
and there are two columns of associated data in columns E and F
On Sheet2 create a list of dates for 7 days, in cells B2 to B8
Put =TODAY() in B2
then in B3 put =B2+1 and drag to extend the formula down to cell B8
Format cells B2 to B8 in a suitable date format.
In Cell C2 put this:=VLOOKUP($B2,Sheet1!$D$5:$F$35,2,FALSE)
in cell D2 put this:=VLOOKUP($B2,Sheet1!$D$5:$F$35,3,FALSE)
Drag to extend both formulas down to row 8.
You will now have 7 days worth of data drawn from the whole month's data.
This is just a basic idea, and there are several ways you could do this.