World Meteorological Organization
Weather · Climate · Water
World Weather Information Service
Official Forecasts

Notes to User

System Requirements

The World Weather Information Service (WWIS) website is best viewed with the latest version of Microsoft Internet Explorer (Version 10 or above), Edge, Mozilla Firefox, Safari or Google Chrome. To update your browsers, please visit one of the websites listed below: For the best viewing experience, we suggest that you enable JavaScript on your browser. If you disable JavaScript, the WWIS website is not able to load weather information data and you are not able to use most of the features in this website.

Cookies are employed by the WWIS website to save user preferences on their computers. No personally identifiable information would be collected and saved. Users may opt for not accepting cookies by changing browser settings. Under such circumstances, user preferences could not be saved and user experience may be affected.

Satellite Images

The satellite images displayed in the WWIS website are produced using data from the following geostationary meteorological satellites:

Satellite Longitude of Satellite
FY-2G (CMA) 105°E
Himawari-8 (JMA) 140.7°E
Meteosat-7 (EUMETSAT) 57.5°E
Meteosat-10 (EUMETSAT) Prime Meridian

In the Satellite column, the organization in parenthesis is the owner of the respective satellite.

Times of Sunrise and Sunset

The provision of the times of sunrise and sunset in this website is in beta version.

The times of sunrise and sunset are calculated using standard algorithm and are generally accurate to within a few minutes. The accuracy of times is also affected by the actual altitude and location of the observation.

Because times of sunrise and sunset are calculated in local time, there is a chance that future times may not be correct, as changes might be made to dates of Daylight Saving Time.

Current Weather

The provision of the current weather information in this website is in beta version.

The current weather for cities displayed on this website are derived from weather reports measured at nearby weather stations. In using the current weather information, users should note that it may be different from actual weather conditions due to various factors, which include but not limited to, difference in topography and altitude of user’s locations and the weather station, and difference in user’s time and observation time of weather report. Users may refer to the latest weather reports which are available on the website of the National Meteorological and Hydrological Services.
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