import arcpy
from arcpy import env 
from arcpy.sa import * 
arcpy.env.workspace = r"I:\ARW_Data\Data\Raw_Data\Soil_Moisture\2011"
arcpy.env.overwriteOutput = True
arcpy.CheckOutExtension('Spatial')
mask = r"I:\ARW_Data\slc_90m_clip1"
arcpy.env.cellSize = r"I:\ARW_Data\slc_90m_clip2"
rasters = arcpy.ListRasters("*.tif", "TIF")
for raster in rasters:
 outraster = raster.replace('.tif','_clip.tif')
 arcpy.gp.ExtractByMask_sa(raster,mask,outraster)