diff --git a/esphome/components/atc_mithermometer/atc_mithermometer.cpp b/esphome/components/atc_mithermometer/atc_mithermometer.cpp
index 42c30598ad..9d550fcf8c 100644
--- a/esphome/components/atc_mithermometer/atc_mithermometer.cpp
+++ b/esphome/components/atc_mithermometer/atc_mithermometer.cpp
@@ -45,6 +45,8 @@ bool ATCMiThermometer::parse_device(const esp32_ble_tracker::ESPBTDevice &device
       this->battery_voltage_->publish_state(*res->battery_voltage);
     success = true;
   }
+  if (this->signal_strength_ != nullptr)
+    this->signal_strength_->publish_state(device.get_rssi());
 
   return success;
 }
diff --git a/esphome/components/atc_mithermometer/atc_mithermometer.h b/esphome/components/atc_mithermometer/atc_mithermometer.h
index ca079bf8c1..9398c02bcf 100644
--- a/esphome/components/atc_mithermometer/atc_mithermometer.h
+++ b/esphome/components/atc_mithermometer/atc_mithermometer.h
@@ -28,6 +28,7 @@ class ATCMiThermometer : public Component, public esp32_ble_tracker::ESPBTDevice
   void set_humidity(sensor::Sensor *humidity) { humidity_ = humidity; }
   void set_battery_level(sensor::Sensor *battery_level) { battery_level_ = battery_level; }
   void set_battery_voltage(sensor::Sensor *battery_voltage) { battery_voltage_ = battery_voltage; }
+  void set_signal_strength(sensor::Sensor *signal_strength) { signal_strength_ = signal_strength; }
 
  protected:
   uint64_t address_;
@@ -35,6 +36,7 @@ class ATCMiThermometer : public Component, public esp32_ble_tracker::ESPBTDevice
   sensor::Sensor *humidity_{nullptr};
   sensor::Sensor *battery_level_{nullptr};
   sensor::Sensor *battery_voltage_{nullptr};
+  sensor::Sensor *signal_strength_{nullptr};
 
   optional<ParseResult> parse_header_(const esp32_ble_tracker::ServiceData &service_data);
   bool parse_message_(const std::vector<uint8_t> &message, ParseResult &result);
diff --git a/esphome/components/atc_mithermometer/sensor.py b/esphome/components/atc_mithermometer/sensor.py
index bde83c28b6..7baab51944 100644
--- a/esphome/components/atc_mithermometer/sensor.py
+++ b/esphome/components/atc_mithermometer/sensor.py
@@ -6,15 +6,18 @@ from esphome.const import (
     CONF_BATTERY_VOLTAGE,
     CONF_MAC_ADDRESS,
     CONF_HUMIDITY,
+    CONF_SIGNAL_STRENGTH,
     CONF_TEMPERATURE,
     CONF_ID,
     DEVICE_CLASS_BATTERY,
     DEVICE_CLASS_HUMIDITY,
+    DEVICE_CLASS_SIGNAL_STRENGTH,
     DEVICE_CLASS_TEMPERATURE,
     DEVICE_CLASS_VOLTAGE,
     ENTITY_CATEGORY_DIAGNOSTIC,
     STATE_CLASS_MEASUREMENT,
     UNIT_CELSIUS,
+    UNIT_DECIBEL_MILLIWATT,
     UNIT_PERCENT,
     UNIT_VOLT,
 )
@@ -59,6 +62,13 @@ CONFIG_SCHEMA = (
                 state_class=STATE_CLASS_MEASUREMENT,
                 entity_category=ENTITY_CATEGORY_DIAGNOSTIC,
             ),
+            cv.Optional(CONF_SIGNAL_STRENGTH): sensor.sensor_schema(
+                unit_of_measurement=UNIT_DECIBEL_MILLIWATT,
+                accuracy_decimals=0,
+                device_class=DEVICE_CLASS_SIGNAL_STRENGTH,
+                state_class=STATE_CLASS_MEASUREMENT,
+                entity_category=ENTITY_CATEGORY_DIAGNOSTIC,
+            ),
         }
     )
     .extend(esp32_ble_tracker.ESP_BLE_DEVICE_SCHEMA)
@@ -85,3 +95,6 @@ async def to_code(config):
     if CONF_BATTERY_VOLTAGE in config:
         sens = await sensor.new_sensor(config[CONF_BATTERY_VOLTAGE])
         cg.add(var.set_battery_voltage(sens))
+    if CONF_SIGNAL_STRENGTH in config:
+        sens = await sensor.new_sensor(config[CONF_SIGNAL_STRENGTH])
+        cg.add(var.set_signal_strength(sens))
diff --git a/esphome/const.py b/esphome/const.py
index 970b3c6578..03f1da0e91 100644
--- a/esphome/const.py
+++ b/esphome/const.py
@@ -599,6 +599,7 @@ CONF_SHOW_VALUES = "show_values"
 CONF_SHUNT_RESISTANCE = "shunt_resistance"
 CONF_SHUNT_VOLTAGE = "shunt_voltage"
 CONF_SHUTDOWN_MESSAGE = "shutdown_message"
+CONF_SIGNAL_STRENGTH = "signal_strength"
 CONF_SINGLE_LIGHT_ID = "single_light_id"
 CONF_SIZE = "size"
 CONF_SLEEP_DURATION = "sleep_duration"