Increase test coverage of `weather.py`

[RDaxini]

Is your feature request related to a problem? Please describe.
Test coverage of the weather module is low. Coverage on main is around 70% (codecov)

Describe the solution you'd like
Increase test coverage, e.g. for functions such as get_anywhere() and get_NSRDB(), check try/except blocks and whether errors are raised as expected, etc.