diff --git a/esphome/components/hydreon_rgxx/hydreon_rgxx.cpp b/esphome/components/hydreon_rgxx/hydreon_rgxx.cpp
index 3ed65831ae..25d2617677 100644
--- a/esphome/components/hydreon_rgxx/hydreon_rgxx.cpp
+++ b/esphome/components/hydreon_rgxx/hydreon_rgxx.cpp
@@ -195,7 +195,7 @@ void HydreonRGxxComponent::process_line_() {
       if (n == std::string::npos) {
         continue;
       }
-      int data = strtol(this->buffer_.substr(n + strlen(PROTOCOL_NAMES[i])).c_str(), nullptr, 10);
+      float data = strtof(this->buffer_.substr(n + strlen(PROTOCOL_NAMES[i])).c_str(), nullptr);
       this->sensors_[i]->publish_state(data);
       ESP_LOGD(TAG, "Received %s: %f", PROTOCOL_NAMES[i], this->sensors_[i]->get_raw_state());
       this->sensors_received_ |= (1 << i);