Fix temp_dew mapping in get_psm3 (#1920)

* Fix temp_dew point mapping

* Add whatsnew entry

Author: AdamRJensen

docs/sphinx/source/whatsnew.rst

@@ -6,6 +6,7 @@ What's New
 
 These are new features and improvements of note in each release.
 
+.. include:: whatsnew/v0.10.3.rst
 .. include:: whatsnew/v0.10.2.rst
 .. include:: whatsnew/v0.10.1.rst
 .. include:: whatsnew/v0.10.0.rst

docs/sphinx/source/whatsnew/v0.10.3.rst

@@ -15,7 +15,8 @@ Enhancements
 
 Bug fixes
 ~~~~~~~~~
-
+* Fix mapping of the dew point column to ``temp_dew`` when ``map_variables``
+  is True in :py:func:`pvlib.iotools.get_psm3`. (:pull:`1920`)
 
 Testing
 ~~~~~~~

pvlib/iotools/psm3.py

@@ -30,7 +30,7 @@
     'Clearsky DNI': 'dni_clear',
     'Solar Zenith Angle': 'solar_zenith',
     'Temperature': 'temp_air',
-    'Dew point': 'temp_dew',
+    'Dew Point': 'temp_dew',
     'Relative Humidity': 'relative_humidity',
     'Pressure': 'pressure',
     'Wind Speed': 'wind_speed',

pvlib/tests/iotools/test_psm3.py

@@ -172,7 +172,7 @@ def test_read_psm3_map_variables():
     data, metadata = psm3.read_psm3(MANUAL_TEST_DATA, map_variables=True)
     columns_mapped = ['Year', 'Month', 'Day', 'Hour', 'Minute', 'dhi', 'ghi',
                       'dni', 'ghi_clear', 'dhi_clear', 'dni_clear',
-                      'Cloud Type', 'Dew Point', 'solar_zenith',
+                      'Cloud Type', 'temp_dew', 'solar_zenith',
                       'Fill Flag', 'albedo', 'wind_speed',
                       'wind_direction', 'precipitable_water',
                       'relative_humidity', 'temp_air', 'pressure']