diff --git a/internal/handler/sensor.go b/internal/handler/sensor.go
index 381be09..97c6f76 100644
--- a/internal/handler/sensor.go
+++ b/internal/handler/sensor.go
@@ -192,7 +192,7 @@ func (h *SensorHandler) GetLatestSensorRawData(w http.ResponseWriter, r *http.Re
 		Temperature      float64   `json:"temperature"`        // 温度(℃)
 		AtmPressure      float64   `json:"atm_pressure"`       // 大气压(kPa)
 		SolarRadiation   int       `json:"solar_radiation"`    // 太阳辐射(W/m²)
-		Rainfall         int       `json:"rainfall"`           // 累计雨量(mm)
+		Rainfall         float64   `json:"rainfall"`           // 累计雨量(mm)
 	}{
 		ID:               data.ID,
 		Timestamp:        data.Timestamp,
@@ -205,7 +205,7 @@ func (h *SensorHandler) GetLatestSensorRawData(w http.ResponseWriter, r *http.Re
 		Temperature:      float64(data.Temperature) / 10.0,
 		AtmPressure:      float64(data.AtmPressure) / 10.0,
 		SolarRadiation:   data.SolarRadiation,
-		Rainfall:         data.OpticalRain,
+		Rainfall:         float64(data.OpticalRain) / 10.0,
 	}
 
 	w.Header().Set("Content-Type", "application/json")