Put your years in column E, so E1 is 2000, E2 is 2001 etc

In cell F1 use the formula =SUMIF(C:C,E1,B:B) and then copy this down.

"Chris26" wrote:

Hi
I have a set of daily data (total rainfall) for100 years.
What would be the easiest way to extract the total rainfall for:-
January Year 2000-2100, February 2000-2100 etc
and also
Total rainfall for 2001, 2002 etc

Col A (Date-Days) Col B (Rainfall mm) Col C (Format to only
show year)
1 Jan 2001 0 2001
2 Jan 2001 6 2001
3 Jan 2001 4 2001
to
31 Dec 2100 20 2100

I have manged to get the following to work
=SUMPRODUCT((TEXT(C3:C36526,"yyyy")="2001")*(B3:B3 6526)) although is it
possible to change "2001" to a cell ref so dont have to go into each
individual line and cgange to "2002", "2003" etc

Many Thanks
Chris