UTC Support in Weather Window

[akey7]

Description

The following exception is thrown if the weather window timestamp is already specified in UTC: TypeError: Already tz-aware, use tz_convert to convert.

Steps to reproduce issue

1. Specify weather window with a timestamp that includes a UTC offset.

Current behavior

The exception in the description above is raised.

Expected behavior

No exception should be raised and the code should adapt to timestamps already in UTC.

Code versions

N/A