diff --git a/homeassistant/components/sensor/wunderground.py b/homeassistant/components/sensor/wunderground.py
index 67c96e66062e0..b4607c2eeb9c1 100644
--- a/homeassistant/components/sensor/wunderground.py
+++ b/homeassistant/components/sensor/wunderground.py
@@ -658,7 +658,7 @@ def _cfg_expand(self, what, default=None):
         try:
             val = val(self.rest)
         except (KeyError, IndexError) as err:
-            _LOGGER.error("Failed to parse response from WU API: %s", err)
+            _LOGGER.warning("Failed to parse response from WU API: %s", err)
             val = default
         except TypeError:
             pass  # val was not callable - keep original value
@@ -684,6 +684,9 @@ def device_state_attributes(self):
                 attrs[attr] = callback(self.rest)
             except TypeError:
                 attrs[attr] = callback
+            except (KeyError, IndexError) as err:
+                _LOGGER.warning("Failed to parse response from WU API: %s",
+                                err)
 
         attrs[ATTR_ATTRIBUTION] = CONF_ATTRIBUTION
         attrs[ATTR_FRIENDLY_NAME] = self._cfg_expand("friendly_name")