What are the odds it'll rain on any given day?

Story Published: Oct 4, 2006 at 2:39 PM PDT

Story Updated: Jan 16, 2008 at 1:55 PM PDT

By Scott Sistek

This chart will show how many times it has rained on any given day over the past 115 years (Jan. 1, 1893 - Dec. 31, 2007) Combination of Seattle-Tacoma Airport and Federal Building
Day	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sept	Oct	Nov	Dec
1	72	64	59	56	52	35	27	9	31	38	53	79
2	66	64	67	58	49	33	29	13	26	44	61	68
3	72	68	64	55	44	32	30	15	29	37	66	69
4	76	67	53	56	44	36	33	9	29	39	67	70
5	68	58	62	59	44	37	26	16	34	37	63	76
6	66	63	44	57	42	41	25	19	26	43	64	65
7	69	63	57	58	34	36	25	14	29	51	73	67
8	75	57	66	43	46	37	21	10	30	41	63	66
9	74	66	66	50	49	43	18	12	25	51	76	73
10	67	66	59	49	43	37	24	12	32	54	73	73
11	66	61	66	58	47	42	24	12	26	43	69	74
12	71	59	67	56	33	41	16	13	26	45	71	65
13	78	67	63	56	41	47	21	19	33	50	71	65
14	71	72	56	52	40	37	19	19	40	51	64	71
15	68	71	61	56	39	27	18	25	27	46	80	71
16	75	75	62	55	49	40	23	22	35	50	72	67
17	73	70	63	50	47	33	15	23	34	48	69	63
18	70	53	57	58	43	35	13	26	36	44	60	63
19	55	61	63	58	45	33	15	18	36	52	86	72
20	69	67	62	45	34	36	11	15	37	51	64	66
21	66	59	63	46	40	29	11	18	28	47	61	74
22	65	65	64	49	36	33	11	24	31	51	60	66
23	72	65	69	45	33	31	13	22	28	46	74	70
24	73	64	61	45	41	35	11	22	30	55	73	67
25	67	60	58	42	48	25	15	28	35	51	67	66
26	62	56	54	39	48	30	16	24	39	51	59	61
27	61	67	59	46	48	36	11	26	33	54	63	72
28	68	65	63	49	44	34	11	24	34	56	60	72
29	65		63	51	38	32	10	28	37	61	76	77
30	65		57	39	39	30	9	24	42	60	76	62
31	63		57		38		11	31		61		64

Blue numbers -- wettest days of month
Red numbers -- driest days of the month
Green number -- wettest day of the year
Orange number -- driest day of the year.

Information supplied by the National Weather Service Seattle

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