The ornamental design for a remote weathersensor, as shown and described.
FIG. 1 is a front perspective view of a remote weather sensor showing an embodiment of our new design;
FIG. 2 is a right elevation view thereof;
FIG. 3 is a left elevation view thereof;
FIG. 4 is a rear elevation view thereof;
FIG. 5 is a front elevation view thereof;
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a bottom plan view thereof, wherein the broken lines in the Figures are for illustrative purposes only and form no part of the claimed design.