diff --git a/homeassistant/components/knx/const.py b/homeassistant/components/knx/const.py
index bacd678bb99..1ec89b47409 100644
--- a/homeassistant/components/knx/const.py
+++ b/homeassistant/components/knx/const.py
@@ -118,6 +118,7 @@ class ColorTempModes(Enum):
     """Color temperature modes for config validation."""
 
     ABSOLUTE = "DPT-7.600"
+    ABSOLUTE_FLOAT = "DPT-9"
     RELATIVE = "DPT-5.001"
 
 
diff --git a/homeassistant/components/knx/light.py b/homeassistant/components/knx/light.py
index f5ef8f61b84..07747f094c3 100644
--- a/homeassistant/components/knx/light.py
+++ b/homeassistant/components/knx/light.py
@@ -4,7 +4,11 @@ from __future__ import annotations
 from typing import Any, cast
 
 from xknx import XKNX
-from xknx.devices.light import Light as XknxLight, XYYColor
+from xknx.devices.light import (
+    ColorTemperatureType,
+    Light as XknxLight,
+    XYYColor,
+)
 
 from homeassistant import config_entries
 from homeassistant.components.light import (
@@ -56,16 +60,20 @@ def _create_light(xknx: XKNX, config: ConfigType) -> XknxLight:
     group_address_tunable_white_state = None
     group_address_color_temp = None
     group_address_color_temp_state = None
-    if config[LightSchema.CONF_COLOR_TEMP_MODE] == ColorTempModes.ABSOLUTE:
-        group_address_color_temp = config.get(LightSchema.CONF_COLOR_TEMP_ADDRESS)
-        group_address_color_temp_state = config.get(
-            LightSchema.CONF_COLOR_TEMP_STATE_ADDRESS
-        )
-    elif config[LightSchema.CONF_COLOR_TEMP_MODE] == ColorTempModes.RELATIVE:
+    color_temperature_type = ColorTemperatureType.UINT_2_BYTE
+    if config[LightSchema.CONF_COLOR_TEMP_MODE] == ColorTempModes.RELATIVE:
         group_address_tunable_white = config.get(LightSchema.CONF_COLOR_TEMP_ADDRESS)
         group_address_tunable_white_state = config.get(
             LightSchema.CONF_COLOR_TEMP_STATE_ADDRESS
         )
+    else:
+        # absolute uint or float
+        group_address_color_temp = config.get(LightSchema.CONF_COLOR_TEMP_ADDRESS)
+        group_address_color_temp_state = config.get(
+            LightSchema.CONF_COLOR_TEMP_STATE_ADDRESS
+        )
+        if config[LightSchema.CONF_COLOR_TEMP_MODE] == ColorTempModes.ABSOLUTE_FLOAT:
+            color_temperature_type = ColorTemperatureType.FLOAT_2_BYTE
 
     return XknxLight(
         xknx,
@@ -140,6 +148,7 @@ def _create_light(xknx: XKNX, config: ConfigType) -> XknxLight:
         group_address_brightness_white_state=individual_color_addresses(
             LightSchema.CONF_WHITE, LightSchema.CONF_BRIGHTNESS_STATE_ADDRESS
         ),
+        color_temperature_type=color_temperature_type,
         min_kelvin=config[LightSchema.CONF_MIN_KELVIN],
         max_kelvin=config[LightSchema.CONF_MAX_KELVIN],
     )
@@ -239,7 +248,7 @@ class KNXLight(KnxEntity, LightEntity):
         """Return the color temperature in Kelvin."""
         if self._device.supports_color_temperature:
             if kelvin := self._device.current_color_temperature:
-                return kelvin
+                return int(kelvin)
         if self._device.supports_tunable_white:
             relative_ct = self._device.current_tunable_white
             if relative_ct is not None:
diff --git a/homeassistant/components/knx/manifest.json b/homeassistant/components/knx/manifest.json
index 6cb6a4ffcf7..79b729017b2 100644
--- a/homeassistant/components/knx/manifest.json
+++ b/homeassistant/components/knx/manifest.json
@@ -11,7 +11,7 @@
   "loggers": ["xknx", "xknxproject"],
   "quality_scale": "platinum",
   "requirements": [
-    "xknx==2.10.0",
+    "xknx==2.11.0",
     "xknxproject==3.2.0",
     "knx-frontend==2023.6.23.191712"
   ]
diff --git a/requirements_all.txt b/requirements_all.txt
index 2546116f246..b6058900420 100644
--- a/requirements_all.txt
+++ b/requirements_all.txt
@@ -2688,7 +2688,7 @@ xbox-webapi==2.0.11
 xiaomi-ble==0.17.2
 
 # homeassistant.components.knx
-xknx==2.10.0
+xknx==2.11.0
 
 # homeassistant.components.knx
 xknxproject==3.2.0
diff --git a/requirements_test_all.txt b/requirements_test_all.txt
index d323757226c..d91b73fb075 100644
--- a/requirements_test_all.txt
+++ b/requirements_test_all.txt
@@ -1967,7 +1967,7 @@ xbox-webapi==2.0.11
 xiaomi-ble==0.17.2
 
 # homeassistant.components.knx
-xknx==2.10.0
+xknx==2.11.0
 
 # homeassistant.components.knx
 xknxproject==3.2.0