diff --git a/homeassistant/components/nam/const.py b/homeassistant/components/nam/const.py
index 2e4d6b0c85a56..4b7b50b309ae3 100644
--- a/homeassistant/components/nam/const.py
+++ b/homeassistant/components/nam/const.py
@@ -20,6 +20,7 @@
 ATTR_BMP280_TEMPERATURE: Final = "bmp280_temperature"
 ATTR_DHT22_HUMIDITY: Final = "dht22_humidity"
 ATTR_DHT22_TEMPERATURE: Final = "dht22_temperature"
+ATTR_DS18B20_TEMPERATURE: Final = "ds18b20_temperature"
 ATTR_HECA_HUMIDITY: Final = "heca_humidity"
 ATTR_HECA_TEMPERATURE: Final = "heca_temperature"
 ATTR_MHZ14A_CARBON_DIOXIDE: Final = "mhz14a_carbon_dioxide"
diff --git a/homeassistant/components/nam/sensor.py b/homeassistant/components/nam/sensor.py
index 0f4647d071fd9..27fae62be8a7f 100644
--- a/homeassistant/components/nam/sensor.py
+++ b/homeassistant/components/nam/sensor.py
@@ -43,6 +43,7 @@
     ATTR_BMP280_TEMPERATURE,
     ATTR_DHT22_HUMIDITY,
     ATTR_DHT22_TEMPERATURE,
+    ATTR_DS18B20_TEMPERATURE,
     ATTR_HECA_HUMIDITY,
     ATTR_HECA_TEMPERATURE,
     ATTR_MHZ14A_CARBON_DIOXIDE,
@@ -145,6 +146,15 @@ class NAMSensorEntityDescription(SensorEntityDescription):
         state_class=SensorStateClass.MEASUREMENT,
         value=lambda sensors: sensors.bmp280_temperature,
     ),
+    NAMSensorEntityDescription(
+        key=ATTR_DS18B20_TEMPERATURE,
+        translation_key="ds18b20_temperature",
+        suggested_display_precision=1,
+        native_unit_of_measurement=UnitOfTemperature.CELSIUS,
+        device_class=SensorDeviceClass.TEMPERATURE,
+        state_class=SensorStateClass.MEASUREMENT,
+        value=lambda sensors: sensors.ds18b20_temperature,
+    ),
     NAMSensorEntityDescription(
         key=ATTR_HECA_HUMIDITY,
         translation_key="heca_humidity",
diff --git a/homeassistant/components/nam/strings.json b/homeassistant/components/nam/strings.json
index be41f50c7b6c9..c4921ec52f96b 100644
--- a/homeassistant/components/nam/strings.json
+++ b/homeassistant/components/nam/strings.json
@@ -75,6 +75,9 @@
       "bmp280_temperature": {
         "name": "BMP280 temperature"
       },
+      "ds18b20_temperature": {
+        "name": "DS18B20 temperature"
+      },
       "heca_humidity": {
         "name": "HECA humidity"
       },
diff --git a/tests/components/nam/fixtures/nam_data.json b/tests/components/nam/fixtures/nam_data.json
index 93a33d4a5529c..82dacbefb342d 100644
--- a/tests/components/nam/fixtures/nam_data.json
+++ b/tests/components/nam/fixtures/nam_data.json
@@ -15,6 +15,7 @@
     { "value_type": "BME280_temperature", "value": "7.56" },
     { "value_type": "BME280_humidity", "value": "45.69" },
     { "value_type": "BME280_pressure", "value": "101101.17" },
+    { "value_type": "DS18B20_temperature", "value": "12.56" },
     { "value_type": "BMP_temperature", "value": "7.56" },
     { "value_type": "BMP_pressure", "value": "103201.18" },
     { "value_type": "BMP280_temperature", "value": "5.56" },
diff --git a/tests/components/nam/snapshots/test_diagnostics.ambr b/tests/components/nam/snapshots/test_diagnostics.ambr
index a8072ee224ddc..c187dec2866ca 100644
--- a/tests/components/nam/snapshots/test_diagnostics.ambr
+++ b/tests/components/nam/snapshots/test_diagnostics.ambr
@@ -11,7 +11,7 @@
       'bmp280_temperature': 5.6,
       'dht22_humidity': 46.2,
       'dht22_temperature': 6.3,
-      'ds18b20_temperature': None,
+      'ds18b20_temperature': 12.6,
       'heca_humidity': 50.0,
       'heca_temperature': 8.0,
       'mhz14a_carbon_dioxide': 865.0,
diff --git a/tests/components/nam/snapshots/test_sensor.ambr b/tests/components/nam/snapshots/test_sensor.ambr
index bbc655ecbb683..ea47998f3de37 100644
--- a/tests/components/nam/snapshots/test_sensor.ambr
+++ b/tests/components/nam/snapshots/test_sensor.ambr
@@ -532,6 +532,60 @@
     'state': '6.3',
   })
 # ---
+# name: test_sensor[sensor.nettigo_air_monitor_ds18b20_temperature-entry]
+  EntityRegistryEntrySnapshot({
+    'aliases': set({
+    }),
+    'area_id': None,
+    'capabilities': dict({
+      'state_class': <SensorStateClass.MEASUREMENT: 'measurement'>,
+    }),
+    'config_entry_id': <ANY>,
+    'device_class': None,
+    'device_id': <ANY>,
+    'disabled_by': None,
+    'domain': 'sensor',
+    'entity_category': None,
+    'entity_id': 'sensor.nettigo_air_monitor_ds18b20_temperature',
+    'has_entity_name': True,
+    'hidden_by': None,
+    'icon': None,
+    'id': <ANY>,
+    'labels': set({
+    }),
+    'name': None,
+    'options': dict({
+      'sensor': dict({
+        'suggested_display_precision': 1,
+      }),
+    }),
+    'original_device_class': <SensorDeviceClass.TEMPERATURE: 'temperature'>,
+    'original_icon': None,
+    'original_name': 'DS18B20 temperature',
+    'platform': 'nam',
+    'previous_unique_id': None,
+    'supported_features': 0,
+    'translation_key': 'ds18b20_temperature',
+    'unique_id': 'aa:bb:cc:dd:ee:ff-ds18b20_temperature',
+    'unit_of_measurement': <UnitOfTemperature.CELSIUS: '°C'>,
+  })
+# ---
+# name: test_sensor[sensor.nettigo_air_monitor_ds18b20_temperature-state]
+  StateSnapshot({
+    'attributes': ReadOnlyDict({
+      'device_class': 'temperature',
+      'friendly_name': 'Nettigo Air Monitor DS18B20 temperature',
+      'state_class': <SensorStateClass.MEASUREMENT: 'measurement'>,
+      'unit_of_measurement': <UnitOfTemperature.CELSIUS: '°C'>,
+    }),
+    'context': <ANY>,
+    'entity_id': 'sensor.nettigo_air_monitor_ds18b20_temperature',
+    'last_changed': <ANY>,
+    'last_reported': <ANY>,
+    'last_updated': <ANY>,
+    'state': '12.6',
+  })
+# ---
 # name: test_sensor[sensor.nettigo_air_monitor_heca_humidity-entry]
   EntityRegistryEntrySnapshot({
     'aliases': set({