diff --git a/internal/mqtt/event.go b/internal/mqtt/event.go
index a4df632..f5e2f30 100644
--- a/internal/mqtt/event.go
+++ b/internal/mqtt/event.go
@@ -2,6 +2,7 @@ package mqtt
 
 import (
 	"fmt"
+	"math"
 	"reflect"
 	"strconv"
 	"time"
@@ -47,9 +48,9 @@ func eventToMap(event *weather.AmbientEntry) map[string]string {
 		case uint, uint8, uint16, uint32, uint64:
 			v = strconv.FormatUint(f.Uint(), 10)
 		case float32:
-			v = strconv.FormatFloat(f.Float(), 'f', 4, 32)
+			v = strconv.FormatFloat(math.Round(f.Float()*10)/10, 'f', 4, 32)
 		case float64:
-			v = strconv.FormatFloat(f.Float(), 'f', 4, 64)
+			v = strconv.FormatFloat(math.Round(f.Float()*10)/10, 'f', 4, 64)
 		case []byte:
 			v = string(f.Bytes())
 		case string: