diff --git a/routes/weather.ts b/routes/weather.ts
index 257dff8..4b7856f 100644
--- a/routes/weather.ts
+++ b/routes/weather.ts
@@ -184,11 +184,6 @@ function checkWeatherRestriction( adjustmentValue: number, weather: WateringData
 export const getWeatherData = async function( req: express.Request, res: express.Response ) {
 	const location: string = getParameter(req.query.loc);
 
-	if ( !weatherProvider.getWeatherData ) {
-		res.send( "Error: selected WeatherProvider does not support getWeatherData" );
-		return;
-	}
-
 	let coordinates: GeoCoordinates;
 	try {
 		coordinates = await resolveCoordinates( location );
@@ -263,11 +258,6 @@ export const getWateringData = async function( req: express.Request, res: expres
 	let timeData: TimeData = getTimeData( coordinates );
 	let wateringData: WateringData;
 	if ( adjustmentMethod !== ADJUSTMENT_METHOD.MANUAL || checkRestrictions ) {
-		if ( !weatherProvider.getWateringData ) {
-			res.send( "Error: selected WeatherProvider does not support getWateringData" );
-			return;
-		}
-
 		try {
 			wateringData = await weatherProvider.getWateringData( coordinates );
 		} catch ( err ) {
diff --git a/routes/weatherProviders/WeatherProvider.ts b/routes/weatherProviders/WeatherProvider.ts
index 5581860..4826df2 100644
--- a/routes/weatherProviders/WeatherProvider.ts
+++ b/routes/weatherProviders/WeatherProvider.ts
@@ -5,15 +5,21 @@ export class WeatherProvider {
 	 * Retrieves weather data necessary for watering level calculations.
 	 * @param coordinates The coordinates to retrieve the watering data for.
 	 * @return A Promise that will be resolved with the WateringData if it is successfully retrieved,
-	 * or rejected with an error message if an error occurs while retrieving the WateringData.
+	 * or rejected with an error message if an error occurs while retrieving the WateringData or the WeatherProvider
+	 * does not support this method.
 	 */
-	getWateringData?( coordinates : GeoCoordinates ): Promise< WateringData >;
+	getWateringData( coordinates : GeoCoordinates ): Promise< WateringData > {
+		throw "Selected WeatherProvider does not support getWateringData";
+	}
 
 	/**
 	 * Retrieves the current weather data for usage in the mobile app.
 	 * @param coordinates The coordinates to retrieve the weather for
 	 * @return A Promise that will be resolved with the WeatherData if it is successfully retrieved,
-	 * or rejected with an error message if an error occurs while retrieving the WeatherData.
+	 * or rejected with an error message if an error occurs while retrieving the WeatherData or the WeatherProvider does
+	 * not support this method.
 	 */
-	getWeatherData?( coordinates : GeoCoordinates ): Promise< WeatherData >;
+	getWeatherData( coordinates : GeoCoordinates ): Promise< WeatherData > {
+		throw "Selected WeatherProvider does not support getWeatherData";
+	}
 }