diff --git a/homeassistant/components/homekit/type_thermostats.py b/homeassistant/components/homekit/type_thermostats.py
index 24a137e4957..c34e9066160 100644
--- a/homeassistant/components/homekit/type_thermostats.py
+++ b/homeassistant/components/homekit/type_thermostats.py
@@ -188,8 +188,14 @@ class Thermostat(HomeAccessory):
                 (CHAR_COOLING_THRESHOLD_TEMPERATURE, CHAR_HEATING_THRESHOLD_TEMPERATURE)
             )
 
+        if (
+            ATTR_CURRENT_HUMIDITY in attributes
+            or features & ClimateEntityFeature.TARGET_HUMIDITY
+        ):
+            self.chars.append(CHAR_CURRENT_HUMIDITY)
+
         if features & ClimateEntityFeature.TARGET_HUMIDITY:
-            self.chars.extend((CHAR_TARGET_HUMIDITY, CHAR_CURRENT_HUMIDITY))
+            self.chars.append(CHAR_TARGET_HUMIDITY)
 
         serv_thermostat = self.add_preload_service(SERV_THERMOSTAT, self.chars)
         self.set_primary_service(serv_thermostat)
@@ -253,7 +259,6 @@ class Thermostat(HomeAccessory):
                 properties={PROP_MIN_VALUE: hc_min_temp, PROP_MAX_VALUE: hc_max_temp},
             )
         self.char_target_humidity = None
-        self.char_current_humidity = None
         if CHAR_TARGET_HUMIDITY in self.chars:
             self.char_target_humidity = serv_thermostat.configure_char(
                 CHAR_TARGET_HUMIDITY,
@@ -265,6 +270,8 @@ class Thermostat(HomeAccessory):
                 # of 0-80%
                 properties={PROP_MIN_VALUE: min_humidity},
             )
+        self.char_current_humidity = None
+        if CHAR_CURRENT_HUMIDITY in self.chars:
             self.char_current_humidity = serv_thermostat.configure_char(
                 CHAR_CURRENT_HUMIDITY, value=50
             )
diff --git a/tests/components/homekit/test_type_thermostats.py b/tests/components/homekit/test_type_thermostats.py
index 1dd191f5303..1a18c7fe805 100644
--- a/tests/components/homekit/test_type_thermostats.py
+++ b/tests/components/homekit/test_type_thermostats.py
@@ -742,6 +742,29 @@ async def test_thermostat_humidity(hass, hk_driver, events):
     assert events[-1].data[ATTR_VALUE] == "35%"
 
 
+async def test_thermostat_humidity_with_target_humidity(hass, hk_driver, events):
+    """Test if accessory and HA are updated accordingly with humidity without target hudmidity.
+
+    This test is for thermostats that do not support target humidity but
+    have a current humidity sensor.
+    """
+    entity_id = "climate.test"
+
+    # support_auto = True
+    hass.states.async_set(entity_id, HVACMode.OFF, {ATTR_CURRENT_HUMIDITY: 40})
+    await hass.async_block_till_done()
+    acc = Thermostat(hass, hk_driver, "Climate", entity_id, 1, None)
+    hk_driver.add_accessory(acc)
+
+    await acc.run()
+    await hass.async_block_till_done()
+
+    assert acc.char_current_humidity.value == 40
+    hass.states.async_set(entity_id, HVACMode.HEAT_COOL, {ATTR_CURRENT_HUMIDITY: 65})
+    await hass.async_block_till_done()
+    assert acc.char_current_humidity.value == 65
+
+
 async def test_thermostat_power_state(hass, hk_driver, events):
     """Test if accessory and HA are updated accordingly."""
     entity_id = "climate.test"