diff --git a/modules/default/weather/weather.js b/modules/default/weather/weather.js
index 8a8dc90c..6a02d182 100644
--- a/modules/default/weather/weather.js
+++ b/modules/default/weather/weather.js
@@ -155,7 +155,7 @@ Module.register("weather", {
 			this.sendNotification("CURRENTWEATHER_TYPE", { type: this.weatherProvider.currentWeather().weatherType.replace("-", "_") });
 		}
 
-		let notificationPayload = {
+		const notificationPayload = {
 			currentWeather: this.weatherProvider?.currentWeatherObject?.simpleClone() ?? null,
 			forecastArray: this.weatherProvider?.weatherForecastArray?.map((ar) => ar.simpleClone()) ?? [],
 			hourlyArray: this.weatherProvider?.weatherHourlyArray?.map((ar) => ar.simpleClone()) ?? [],
diff --git a/modules/default/weather/weatherobject.js b/modules/default/weather/weatherobject.js
index 08b79fef..c2e6727b 100755
--- a/modules/default/weather/weatherobject.js
+++ b/modules/default/weather/weatherobject.js
@@ -148,9 +148,12 @@ class WeatherObject {
 	}
 
 	/**
-	 * Clone to simple object to prevent mutating and deprecated legacy library.
+	 * Clone to simple object to prevent mutating and deprecation of legacy library.
 	 *
-	 * @returns {object} simple object cloned.
+	 * Before being handed to other modules, mutable values must be cloned safely.
+	 * Especially 'moment' object is not immutable, so original 'date', 'sunrise', 'sunset' could be corrupted or changed by other modules.
+	 *
+	 * @returns {object} plained object clone of original weatherObject
 	 */
 	simpleClone() {
 		const toFlat = ["date", "sunrise", "sunset"];