diff --git a/homeassistant/components/google_assistant/trait.py b/homeassistant/components/google_assistant/trait.py
index 5ae72b7a41ae..6c80a69bf4c6 100644
--- a/homeassistant/components/google_assistant/trait.py
+++ b/homeassistant/components/google_assistant/trait.py
@@ -1076,14 +1076,16 @@ class TemperatureControlTrait(_Trait):
                     float(attrs[water_heater.ATTR_MIN_TEMP]),
                     unit,
                     UnitOfTemperature.CELSIUS,
-                )
+                ),
+                1,
             )
             max_temp = round(
                 TemperatureConverter.convert(
                     float(attrs[water_heater.ATTR_MAX_TEMP]),
                     unit,
                     UnitOfTemperature.CELSIUS,
-                )
+                ),
+                1,
             )
             response["temperatureRange"] = {
                 "minThresholdCelsius": min_temp,
@@ -1236,14 +1238,16 @@ class TemperatureSettingTrait(_Trait):
                 float(attrs[climate.ATTR_MIN_TEMP]),
                 unit,
                 UnitOfTemperature.CELSIUS,
-            )
+            ),
+            1,
         )
         max_temp = round(
             TemperatureConverter.convert(
                 float(attrs[climate.ATTR_MAX_TEMP]),
                 unit,
                 UnitOfTemperature.CELSIUS,
-            )
+            ),
+            1,
         )
         response["thermostatTemperatureRange"] = {
             "minThresholdCelsius": min_temp,
diff --git a/tests/components/google_assistant/test_trait.py b/tests/components/google_assistant/test_trait.py
index ee2ab1278894..53b03a596e13 100644
--- a/tests/components/google_assistant/test_trait.py
+++ b/tests/components/google_assistant/test_trait.py
@@ -1325,7 +1325,7 @@ async def test_temperature_setting_climate_onoff(hass: HomeAssistant) -> None:
     assert trt.sync_attributes() == {
         "availableThermostatModes": ["off", "cool", "heat", "heatcool", "on"],
         "thermostatTemperatureRange": {
-            "minThresholdCelsius": 7,
+            "minThresholdCelsius": 7.2,
             "maxThresholdCelsius": 35,
         },
         "thermostatTemperatureUnit": "F",
@@ -1373,6 +1373,43 @@ async def test_temperature_setting_climate_no_modes(hass: HomeAssistant) -> None
     }
 
 
+async def test_temperature_setting_climate_range_fahrenheit_precision(
+    hass: HomeAssistant,
+) -> None:
+    """Test that Fahrenheit range bounds are reported to Google with decimal precision.
+
+    Regression test: when a climate entity advertises an integer Fahrenheit min/max
+    whose Celsius equivalent is non-integer (e.g. 62°F = 16.666…°C), rounding the
+    converted value to a whole degree Celsius causes Google Home to display a range
+    shifted by up to 1°F when it converts back for display. Reporting one decimal
+    place of Celsius precision keeps Google's displayed range aligned with
+    Home Assistant's.
+    """
+    hass.config.units = US_CUSTOMARY_SYSTEM
+
+    trt = trait.TemperatureSettingTrait(
+        hass,
+        State(
+            "climate.bla",
+            climate.HVACMode.COOL,
+            {
+                ATTR_SUPPORTED_FEATURES: ClimateEntityFeature.TARGET_TEMPERATURE,
+                climate.ATTR_HVAC_MODES: [climate.HVACMode.OFF, climate.HVACMode.COOL],
+                climate.ATTR_MIN_TEMP: 62,
+                climate.ATTR_MAX_TEMP: 86,
+            },
+        ),
+        BASIC_CONFIG,
+    )
+    attrs = trt.sync_attributes()
+    assert attrs["thermostatTemperatureRange"] == {
+        "minThresholdCelsius": 16.7,
+        "maxThresholdCelsius": 30,
+    }
+    # 16.7°C → 62.06°F (displays as 62°F, matching Home Assistant's min of 62°F);
+    # the pre-fix value of 17°C → 62.6°F would have displayed as 63°F.
+
+
 async def test_temperature_setting_climate_range(hass: HomeAssistant) -> None:
     """Test TemperatureSetting trait support for climate domain - range."""
     assert helpers.get_google_type(climate.DOMAIN, None) is not None
@@ -1409,7 +1446,7 @@ async def test_temperature_setting_climate_range(hass: HomeAssistant) -> None:
         "availableThermostatModes": ["off", "cool", "heat", "auto", "on"],
         "thermostatTemperatureRange": {
             "minThresholdCelsius": 10,
-            "maxThresholdCelsius": 27,
+            "maxThresholdCelsius": 26.7,
         },
         "thermostatTemperatureUnit": "F",
     }