URNT12 KNHC 210516
VORTEX DATA MESSAGE
A. 21/05:01:20Z
B. 19 deg 26 min N
086 deg 02 min W
C. 700 mb 2477 m
D. NA kt
E. NA deg nm
F. 116 deg 128 kt
G. 28 deg 019 nm
H. 930 mb
I. 10 C/ 3051 m
J. 20 C/ 3054 m
K. 9 C/ NA
L. CLOSED
M. C35
N. 12345/ 7
O. 0.02 / 1 nm
P. AF306 1324A WILMA OB 09
MAX FL WIND 128 KT NE QUAD 04:55:50 Z

Line J is the temp inside the Eye, and line K is the dewpoint inside the Eye.
A wide spread like that is part of the reason you are able to see through the Eye so clearly on satellite pics.

This gives an approximate Relative humidity of 49% inside the Eye.
http://www.eustis.army.mil/weather/weather_products/wxconversions.htm