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What are the sources for WeatherOnline forecasts?


The WeatherOnline forecasts are created by using a MOS system developed in-house with the most current US weather services model data (GFS). The statistical methods of the Model-Output-Statistic (MOS)-System were developed in cooperation with the Meteorological Department of the University of Bonn.

What is a MOS-System?


A Model-Output-Statistic (MOS)-System combines the data of the weather forecast model and the locally recorded data for any given point by transforming the model data from a coarse grid to detailed small scale areas.
In order to do so, one needs a large volume of past model forecast data as well as the corresponding recorded data for any given location. The MOS-System relates these two sets of data in an optimized fashion allowing development of the local weather forecast by using the most current model forecast.

What are the time intervals used in the temperature and icons of the local forecasts?


The forecasted maximum temperature always refers to a 12hour window from 6am to 6om local time.
The forecasted minimum temperature always refers to the 12hour window from 6pm of the day before the forecast day to 6 am of the forecast day.
The weather icon for the morning refers to the time between 6am and 12pm local time, the icon for the afternoon is valid from 12am to 6pm local time and the evening icon refers to the time from 6pm to 12am local time.

How often are the current weather conditions and forecasts updated?


The current weather information as well as the satellite images are updated every 30 minutes whereas the radar images are being updated every 15 minutes.
The local weather forecasts as well as the weather charts are updated 8 times a day. The updates start at 2 am CEST or 3 am CEST depending on daylight saving time and continue on a three hourly bases.


Nearby Weather Stations - Sifnos Distance
Milos Airport 38.2 km
Paros Airport 45.7 km
Syros Airport 55.3 km
Naxos Airport 73.4 km
Naxos 74.3 km
Mykonos 84.8 km
Santorini 97.2 km
Athens Airport 130.0 km
El Venizelos 131.2 km
Elliniko Airport 144.9 km
Tatoi Palace 155.6 km
Chania Intl. Airport 158.1 km
Elefsina Airport 171.3 km
Heraklion Airport 172.8 km
Tanagra Airport 190.2 km
Kastelli Airport 191.5 km
Tympaki Airport 192.8 km
Kythira 201.6 km
Skyros Airport 204.1 km
Chios Airport 209.2 km
Çeşme 221.4 km
Leros 232.9 km
Sitia Airport 234.0 km
Samos Airport 254.9 km
Skiathos 262.8 km
Tripoli Airport 264.3 km
Kos Airport 264.8 km
Kuşadası 296.0 km
Mytilene 297.2 km
Çiğli Air Base 298.6 km
Kalamata 300.7 km
İzmir Adnan Menderes Airport 301.8 km
Bodrum 302.5 km
Lemnos Airport 303.2 km
İzmir 309.7 km
Nea Anchialos Airport 313.8 km
Karpathos 317.1 km
Lamia 320.0 km
Dikili 320.9 km
Ayvalık 321.7 km
Datça 329.5 km
Milas- Bodrum Airport 329.5 km
Methoni 336.1 km
Manisa 344.5 km
Aydın 359.8 km
Balıkesir Koca Seyit Airport 364.1 km
Çanakkale 369.1 km
Larissa National Airport 373.6 km
Rhodes/Paradissi 379.0 km
Patras Araxos Airport 386.8 km
Andravida 394.4 km
Marmaris 395.4 km
Akhisar 399.4 km
Kavala/Chrisoupolis 406.6 km
Muğla 407.1 km
Thessaloniki Airport 410.6 km
Alexandroupolis Airport 413.0 km
Zakynthos Airport 434.2 km
Balıkesir 443.6 km
Dalaman 454.4 km
Kozani 472.0 km
Preveza 483.1 km
Cephalonia Airport 484.0 km
Bandırma 492.5 km
Tobruk 501.3 km
Tekirdağ 510.4 km
Ioannina 518.4 km
Kastoria Airport 522.9 km
Florina 537.6 km
Korçë 577.6 km
Gjirokastër 601.0 km
Sarandë 604.6 km
Istanbul 605.2 km
Marj 624.9 km
Benghazi Airport 704.1 km