NATIONAL OPTICAL ASTRONOMY OBSERVATORIES
	CERRO TOLOLO INTER-AMERICAN OBSERVATORY
Meteorology Report		Month: May		Year: 1980
Date	Cloud cover	Photometric	Useful	Useless
1 - 2	0-0-0-0	*
2 - 3	0-0-2-2	*
3 - 4	0-0-0-4	*	*
4 - 5	3-2-0-0	*	*
5 - 6	0-0-0-3	*	*
6 - 7	0-0-0-3	*	*
7 - 8	3-1-3-4	*	*
8 - 9	8-8-8-8			*
9 - 10	8-8-8-8			*
10 - 11	2-3-1-1	*	*
11 - 12	2-2-2-1	*	*
12 - 13	1-1-4-7	*	*	*
13 - 14	8-8-8-8			*
14 - 15	8-8-8-8			*
15 - 16	8-8-8-8			*
16 - 17	1-0-0-0	*
17 - 18	1-0-1-0	*
18 - 19	3-2-8-8		*	*
19 - 20	8-8-8-8			*
20 - 21	3-0-8-8		*	*
21 - 22	3-1-3-3	*	*
22 - 23	0-0-0-0	*
23 - 24	0-1-3-1	*	*
24 - 25	4-6-3-4			*
25 - 26	4-1-0-0	*	*
26 - 27	0-0-0-0	*
27 - 28	0-3-0-0	*	*
28 - 29	1-1-2-3	*	*
29 - 30	6-7-7-7			*
30 - 31	7-6-0-1		*	*
31 - 1	4-3-4-4		*	*
	Totals	19	17	13
		Min.	Med.	Max.
Temperat. deg.F		35	56	74
Humidity % RH		5		100
Wind speed M/H			48	70
Water, precipitation	this month	1.8mm	tot.year:	83.3mm
			Report by: Oscar Saa