diff --git a/homeassistant/components/dlink/data.py b/homeassistant/components/dlink/data.py
index c9e3b20a0bf8..b93cd2191669 100644
--- a/homeassistant/components/dlink/data.py
+++ b/homeassistant/components/dlink/data.py
@@ -19,9 +19,9 @@ class SmartPlugData:
         """Initialize the data object."""
         self.smartplug = smartplug
         self.state: str | None = None
-        self.temperature: str | None = None
-        self.current_consumption = None
-        self.total_consumption: str | None = None
+        self.temperature: str = ""
+        self.current_consumption: str = ""
+        self.total_consumption: str = ""
         self.available = False
         self._n_tried = 0
         self._last_tried: datetime | None = None
diff --git a/homeassistant/components/dlink/switch.py b/homeassistant/components/dlink/switch.py
index 9827c1c13a1b..e6b9a4c7883e 100644
--- a/homeassistant/components/dlink/switch.py
+++ b/homeassistant/components/dlink/switch.py
@@ -94,17 +94,22 @@ class SmartPlugSwitch(DLinkEntity, SwitchEntity):
     @property
     def extra_state_attributes(self) -> dict[str, Any]:
         """Return the state attributes of the device."""
-        attrs: dict[str, Any] = {}
-        if self.data.temperature and self.data.temperature.isnumeric():
-            attrs[ATTR_TEMPERATURE] = self.hass.config.units.temperature(
+        try:
+            temperature = self.hass.config.units.temperature(
                 int(self.data.temperature), UnitOfTemperature.CELSIUS
             )
-        else:
-            attrs[ATTR_TEMPERATURE] = None
-        if self.data.total_consumption and self.data.total_consumption.isnumeric():
-            attrs[ATTR_TOTAL_CONSUMPTION] = float(self.data.total_consumption)
-        else:
-            attrs[ATTR_TOTAL_CONSUMPTION] = None
+        except ValueError:
+            temperature = None
+
+        try:
+            total_consumption = float(self.data.total_consumption)
+        except ValueError:
+            total_consumption = None
+
+        attrs = {
+            ATTR_TOTAL_CONSUMPTION: total_consumption,
+            ATTR_TEMPERATURE: temperature,
+        }
 
         return attrs