| OBSERVING STATISTICS  | 
| January - June 2005  | 
|   | 
|   | 
Clear Nights* | 
Photometric Nights | 
Number of Observation Hours | 
Average Temperture (ºC) | 
Average Wind Speed (m/s) | 
Average Humidity (%) | 
| January | 
23 | 
15 | 
309.1 | 
 0.0 | 
 5.8 | 
49.1 | 
| February | 
12 | 
10 | 
157.3 | 
-3.9 | 
 4.7 | 
76.9 | 
| March | 
 8 | 
 3 | 
121.7 | 
 1.3 | 
 5.1 | 
78.1 | 
| April | 
13 | 
 7 | 
161.1 | 
 5.0 | 
 6.2 | 
65.4 | 
| May | 
13 | 
 7 | 
159.5 | 
 10.8 | 
 5.7 | 
 52.9 | 
| June | 
17 | 
 9 | 
177.5 | 
 14.8 | 
 4.7 | 
55.9 | 
|   | 
| Total number of clear nights from January 1 to June 30, 2005:   86 | 
| *A clear night is when the sky is 70% clear for more than 6 hours | 
| Comments and suggestions to U. Thiele (uthiele@caha.es) |