Formula for counting rain days of the year, month, and or week

Hum, Im trying to put a PT together, as suggested, but...
1. how would you get week nums?
2. how do you exclude 0's?

	F	G	H	I	J	K	L	M	N
5	year	rain days	month	rain days	week	rain days		2015
6	2015	1733	January 2015	292	1, 2015	20		Jan	1485
7	2016	930	February 2015	175	2, 2015			Feb	1340
8			March 2015	146	3, 2015			Mar	1487
9			January 2016	224	wk. 4, 2015			Apr	1440
10			February 2016	252				May	1487
11			March 2016	105				Jun	1440
12								Jul	1488
13								Aug	1488
14								Sep	1440
15								Oct	1488
16								Nov	1440
17								Dec	1488
18								2016	6778

M:N are a PT