convertPrecipitationUnit (value, valueUnit, outputUnit) {
		if (valueUnit === "%") return `${value.toFixed(0)} ${valueUnit}`;

		let convertedValue = value;
		let conversionUnit = valueUnit;
		if (outputUnit === "imperial") {
			convertedValue = this.convertPrecipitationToInch(value, valueUnit);
			conversionUnit = "in";
		} else {
			conversionUnit = valueUnit ? valueUnit : "mm";
		}

		return `${convertedValue.toFixed(2)} ${conversionUnit}`;
	}
Convert a value in a given unit to a string with a converted
value and a postfix matching the output unit system.
@param {number} value - The value to convert.
@param {string} valueUnit - The unit the values has. Default is mm.
@param {string} outputUnit - The unit system (imperial/metric) the return value should have.
@returns {string} - A string with tha value and a unit postfix.