Salt Lake City Effective Observing Hours
Number of effective hours of dark skies and lunar observing for Salt Lake City, Utah
2008 observing hours times climate percent clear sky
For temperature limited, exclude Dec., Jan. Feb. Mar. and one-half Nov. hours

Month	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
% Clear	16%	18%	23%	23%	29%	47%	55%	52%	57%	45%	30%	19%
2008 dark sky hours	209	172	164	132	119	109	117	135	155	190	209	214
2008 effective dark sky hours	33	31	38	30	35	51	64	70	88	86	63	41
2008 lunar obs hours	151	126	112	86	73	62	76	88	111	118	140	140
2008 effective lunar obs hours	24	23	26	20	21	29	42	46	63	53	42	27
% Cldy	61%	57%	52%	47%	39%	20%	13%	13%	17%	29%	47%	58%
% Partly Cldy	23%	25%	26%	30%	32%	33%	32%	35%	27%	26%	23%	23%
Ave Min Mo Temp F	19	25	31	38	46	55	64	62	51	40	31	22
Mean Clear Days	5	5	7	7	9	14	17	16	17	14	9	6
Mean Partly Cldy Days	7	7	8	9	10	10	10	11	8	8	7	7
Mean Cldy Days	19	16	16	14	12	6	4	4	5	9	14	18