Astroclimatology of Paranal

Monthly Statistics (85-04) Annual Plots ( Summer 2004 2003 2002 2001 2000 1999 1998 1997 1996 1995 1994 1993 1990 1989 1988 1988 1986 1985)

Humidity at Paranal: Annual Statistics

Average Relative Humidity (%)

Nighttime (23h-10hUT)	1985	1986	1987	1988	1989	1990	1993	1994	1995	1996	1997	1998	1999	2000	2001	2002	2003	2004
January	24	24	20	17	16	14	16	21	24	22	42	19	22	42	28	19	14	18
February	29	24	21	18	38	14	13	24	20	25	23	28	40	33	32	30	31	34
March	34	21	23	16	24	17	21	19	27	24	29	23	31	40	44	36	15	19
April	12	17	15	16	23	11	16	22	14	18	17	19	16	24	26	24	13	22
May	7	12		13	16	10	17	11	13	12	18	14	14	17	16	24	17	12
June	11	7		7	13	11	7	7	12	13	21	17	12	20	10	10	10	10
July	10	8		4	12	11	8	10	8	10	7	13	12	14	10	23	11	17
August	8	10		5	11	6	14	12	6	12	19	9	8	10	10	8	11	14
September	6	5		7	6	9	10	9	11	8	17	8	9	11	11	8	8	11
October	8	7		3	9	8	9	11	8	15	11	10	13	7	8	9	8	9
November	8	9	11	11	7	10	12	10	8	9	9	9	11	8	8	8	10	11
December	10	14	8	24	11	7	12	19	17	13	12	19	16	13	14	11	11	16
Year	15	14	14	13	15	12	14	14	14	15	17	15	17	20	18	17	13	16
Nr. of nights>80%	5	1	2	0	7	2	3	1	3	5	9	3	9	13	0	2	0	1