Marco Leon wrote:


Perhaps the controller deemed that the runway was unsafe due to the
visibility. Without being able to see if the runway was clear, he could not
verify it was safe:

Never the controllers call. Always the pilots call.

3-3-2. CLOSED/UNSAFE RUNWAY INFORMATION
If an aircraft requests to takeoff, land, or touch-and-go on a closed or
unsafe runway, inform the pilot the runway is closed or unsafe, and
a. If the pilot persists in his/her request, quote him/her the appropriate
parts of the NOTAM applying to the runway and inform him/her that a
clearance cannot be issued.
b. Then, if the pilot insists and in your opinion the intended operation
would not adversely affect other traffic, inform him/her that the operation
will be at his/her own risk.


This has nothing to do with weather.