- Address round-off effects in :py:func:`pvlib.ivtools.utils._schumaker_qspline` (:issue:`1311`, :pull:`1315`)
- Fixed a bug in :py:func:`pvlib.spectrum.spectrl2` where negative spectral irradiance values were returned when the sun is behind the plane of array (:issue:`1348`, :pull:`1349`)
- Cliff Hansen (:ghuser:`cwhanse`)
- :ghuser:`Antoine-0`
- :ghuser:`Carlosbogo`
- Christian Weickhmann (:ghuser:`cweickhmann`)
- Kevin Anderson (:ghuser:`kanderso-nrel`)