As a matter of fact, it's hard to find an overall satisfactory desktop weather application. Many weather forecasting programs known for Windows either don't offer enough or accurate weather information, or are much too bloated in file size or UI design, or even don't work at all. If you want a free, lightweight program that comes with an impressive features set, Tray Weather may be just what you are looking for.

Tray Weather is a simple yet practical application for retrieving and showing detailed weather data for a given geographic location in a small dialog and in the system tray. It's free and open-source, developed by FelixdelasPozas (Félix de las Pozas Álvarez) from Spain. It features very intuitive, streamlined UI design, and is very easy to configure while providing detailed, up-to-date and accurate weather reports and forecasts.

Tray Weather uses the free IP Geolocation API service from IP-API.com to automatically detect user's IP geolocation, or you can manually input your geographic location by specifying the latitude and longitude coordinates. And, Tray Weather obtains the weather and maps information from the popular weather and forecast service OpenWeatherMap.

Tray Weather can display the following weather information: current temperature, maximum temperature, minimum temperature, cloudiness, humidity, ground pressure, wind speed, wind direction, rain accumulation, snow accumulation, sunrise time, sunset time, air quality, ultraviolet radiation, moon phase, temperature forecast, pollution concentration forecast, ultraviolet radiation forecast, temperature map, etc.

System Requirements

  • Internet connection
  • OpenWeatherMap API key

Prompts

  • The API key (which is free) requires you to sign up for an OpenWeatherMap account, and it doesn't work until you verify your email address (that usually takes minutes to hours, then you'll get an email reminder). Otherwise, your API key will keep saying "Invalid OpenWeatherMap API Key" in Tray Weather.
  • At night, the weather icon changes to display the current moon phase.

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