diff --git a/mlair/data_handler/data_handler_wrf_chem.py b/mlair/data_handler/data_handler_wrf_chem.py
index 82bf3fe17f65be5d2422f8bde7ca42356cf0f67b..c89442c0b4e19a0f523c89c31e3d7abd3c58065b 100644
--- a/mlair/data_handler/data_handler_wrf_chem.py
+++ b/mlair/data_handler/data_handler_wrf_chem.py
@@ -3,7 +3,9 @@ __data__ = "2021-02-03"
 
 import xarray as xr
 import numpy as np
+import pandas as pd
 import itertools
+import glob
 import matplotlib.pyplot as plt
 from dask.diagnostics import ProgressBar
 
@@ -60,6 +62,7 @@ class BaseWrfChemDataLoader:
                  physical_t_coord_name: str = DEFAULT_PHYSICAL_TIME_COORD_NAME,
                  staged_vars: List[str] = DEFAULT_STAGED_VARS,
                  variables=None, z_coord_selector=None,
+                 start_time=None, end_time=None,
                  staged_rotation_opts: Dict = DEFAULT_STAGED_ROTATION_opts,
                  vars_to_rotate: Tuple[Tuple[Tuple[str, str], Tuple[str, str]]] = DEFAULT_VARS_TO_ROTATE,
                  staged_dimension_mapping=None, stag_ending='_stag',
@@ -84,6 +87,9 @@ class BaseWrfChemDataLoader:
         self.variables = variables
         self.z_coord_selector = z_coord_selector
 
+        self.start_time = start_time
+        self.end_time = end_time
+
         if rechunk_values is None:
             self.rechunk_values = {self.time_dim_name: 1}
         else:
@@ -118,7 +124,19 @@ class BaseWrfChemDataLoader:
 
     @property
     def dataset_search_str(self):
-        return os.path.join(self.data_path, self.common_file_starter + '*')
+        if (self.start_time is None) and (self.end_time is None):
+            return os.path.join(self.data_path, self.common_file_starter + '*')
+        elif (self.start_time is not None) and (self.end_time is not None):
+            path_list = []
+            for day in pd.date_range(self.start_time, self.end_time):
+                path_list += sorted(glob.glob(os.path.join(self.data_path,
+                                                           self.common_file_starter) + '*' + day.strftime(
+                    "%Y-%m-%d") + '*'
+                                              ))
+
+            return path_list
+        else:
+            raise ValueError(f"`start_time' and `end_time' must both be given or None.")
 
     @TimeTrackingWrapper
     def open_data(self):
@@ -496,7 +514,9 @@ class DataHandlerSingleGridColumn(DataHandlerSingleStation):
                                                        time_dim_name=self.time_dim,
                                                        rechunk_values=self.rechunk_values,
                                                        variables=self.variables,
-                                                       z_coord_selector=self._joint_z_coord_selector
+                                                       z_coord_selector=self._joint_z_coord_selector,
+                                                       start_time=self.start,
+                                                       end_time=self.end,
 
                                                        # preprocess_open_mfdataset=preprocess_fkt_for_loader,
                                                        )
@@ -937,7 +957,7 @@ if __name__ == '__main__':
 
         wrf_new = SingleGridColumnWrfChemDataLoader((lat_xr, lon_xr),
                                                     data_path='/home/felix/Data/WRF-Chem/upload_aura_2021-02-24/2009/',
-                                                    common_file_starter='wrfout_d0',
+                                                    common_file_starter='wrfout_d01_',
                                                     time_dim_name='XTIME',
                                                     logical_x_coord_name='west_east',
                                                     logical_y_coord_name='south_north',