diff --git a/Calendar/WeatherForecast.py b/Calendar/WeatherForecast.py
new file mode 100644
index 0000000..77d07b9
--- /dev/null
+++ b/Calendar/WeatherForecast.py
@@ -0,0 +1,17 @@
+class WeatherForecast (object):
+    """Defines a weather forecast, independent of any implementation"""
+    def __init__ (self):
+        self.air_temperature = None
+        self.rain_probability = None
+        self.rain_amount = None
+        self.sunrise = None
+        self.sunset = None
+        self.moon_phase = None
+        self.wind_speed = None
+
+        self.icon = None
+        self.short_description = None
+
+        self.date = None
+        self.place = None
+        self.fetch_time = None
\ No newline at end of file