Dimm Seeing Statistics by Month

     Site        Paranal  
Year 2017
Units arcsecs
Percentiles 5% 10% 15% 20% 25% 50% 75% 90% 95% 97.5% 99% 99.5% mean std N
JAN 0.42 0.46 0.50 0.53 0.56 0.71 0.93 1.20 1.41 1.63 1.95 2.20 0.79 0.33 11121
FEB 0.38 0.43 0.47 0.51 0.54 0.68 0.89 1.31 1.66 1.95 2.28 2.47 0.79 0.40 9827
MAR 0.38 0.42 0.45 0.48 0.50 0.61 0.78 1.01 1.26 1.81 2.29 2.50 0.70 0.34 12839
APR 0.39 0.43 0.46 0.49 0.52 0.66 0.91 1.31 1.71 2.09 2.42 2.61 0.79 0.42 14006
MAY 0.46 0.52 0.57 0.61 0.66 0.87 1.23 1.66 1.95 2.21 2.49 2.68 1.00 0.47 8877
JUN 0.41 0.47 0.51 0.55 0.58 0.77 1.21 1.63 1.84 2.10 2.39 2.56 0.93 0.47 9338
JUL 0.45 0.49 0.52 0.56 0.61 0.79 1.04 1.46 1.78 2.06 2.42 2.63 0.89 0.42 14216
AUG 0.41 0.45 0.48 0.50 0.53 0.66 0.93 1.27 1.50 1.76 2.09 2.36 0.77 0.37 13867
SEP 0.45 0.49 0.53 0.55 0.58 0.75 1.07 1.55 1.94 2.42 2.73 2.84 0.91 0.49 11652
OCT 0.45 0.50 0.53 0.56 0.58 0.70 0.88 1.10 1.27 1.43 1.61 1.75 0.76 0.26 13651
NOV 0.44 0.47 0.50 0.52 0.54 0.65 0.84 1.27 1.56 1.76 2.00 2.20 0.76 0.35 12310
DEC 0.39 0.44 0.48 0.51 0.54 0.66 0.86 1.15 1.41 1.70 2.02 2.29 0.75 0.33 11604
Anual/Partial 0.41 0.46 0.49 0.52 0.55 0.70 0.94 1.33 1.64 1.93 2.31 2.55 0.81 0.40 143308