Fix precipitation styles (#3041)

They weren't applied to wrong classnames, this PR fixes that and also
expands the weather util tests

---------

Co-authored-by: veeck <michael@veeck.de>

modules/default/weather/weatherutils.js

@@ -12,7 +12,7 @@ const WeatherUtils = {
 	 * @returns {number} the speed in beaufort
 	 */
 	beaufortWindSpeed(speedInMS) {
-		const windInKmh = (speedInMS * 3600) / 1000;
+		const windInKmh = this.convertWind(speedInMS, "kmh");
 		const speeds = [1, 5, 11, 19, 28, 38, 49, 61, 74, 88, 102, 117, 1000];
 		for (const [index, speed] of speeds.entries()) {
 			if (speed > windInKmh) {
@@ -40,6 +40,8 @@ const WeatherUtils = {
 			valueUnit = valueUnit ? valueUnit : "mm";
 		}
 
+		if (valueUnit === "%") return `${value}${valueUnit}`;
+
 		return `${value.toFixed(2)} ${valueUnit}`;
 	},