Your input "climate.shp" is a shapefile not a feature class (a dataset inside a geodatabase).
I would recommend that you actually get all of your data into geodatabases first.
Use arcpy.FeatureClassToFeatureClass_conversion or arcpy.CopyFeatures_management to copy the input to the output and disable Z & M geometries using the flags available in environment settings:
See here :
ArcGIS Help (10.2, 10.2.1, and 10.2.2)
ArcGIS Help (10.2, 10.2.1, and 10.2.2)
So your code might look like this :
import arcpy
from arcpy import env
env.workspace = "c:/Data/AGeodatabase.gdb"
inFeature = "climate"
outFeature = "climate2"
env.outputZFlag = "Disabled"
env.outputMFlag = "Disabled"
arcpy.FeatureClassToFeatureClass_conversion(inFeature, outFeature)