We are happy to introduce to you our new service that provides historical weather data for more than 30,000 cities/towns for the last 5 years.

Now you can simply choose a city/town (or several cities/towns) and download an archive, which contains a bulk file with the weather history for up to 5 years – any day or week, or even several years. Pricing is simple and easy – just $10 for one city/town, no matter how much data you receive – see http://openweathermap.org/price.

Just sign in and place an order on your personal page at https://home.openweathermap.org/history_bulks/new. Please note that our traditional History API stays the same.

We invite you to try our new product, Weather Alerts – it provides weather alerts based on our meteorological data.

Now you can use simple syntax to create triggers, which will work upon the occurrence of specified weather conditions (temperature, humidity, pressure, etc.) in a certain period of time. For example, if you are interested in forecasts of the approach of frosts or the probability of strengthening of wind in a certain place, you can get this information by using our new tool.

The alerts will be generated in our service when the conditions for the trigger are satisfied. You will need to poll the service within a certain time interval in order to receive them. For the future, we are planning to improve and develop this service, with the addition of push notifications and new data sources.

You can find out more at http://openweathermap.org/triggers.

Weather Alerts structure: http://openweathermap.org/triggers-struct.

OpenWeatherMap is happy to announce good news for owners of private weather stations! We are launching a new version of Weather Stations API 3.0. Now there are more easy ways to manage your stations and transmit their data.

Thank you to Francesco Azzola for the article:
– http://www.survivingwithandroid.com
– @survivingwithan
– https://it.linkedin.com/in/francescoazzola

This post describes how to use OpenWeatherMap UV Index. This is an interesting API because we can use it to explore some important aspects of Android and of location-aware APIs. OpenWeatherMap provides this API for free! As you may already know, OpenWeatherMap also provides a full set of APIs about weather information: you can get current weather conditions, forecast, historical information and so on. This information is free, and we can use OpenWeatherMap APIs free of charge.

At the end of this article, we will build an Android app that gets the UV index and shows it using Material Design guidelines.

Before diving into the details of the app, it is useful to have some idea about the UV index.

There are many online map services for those who prefer active leisure. For example, here is a map with bike routes: http://www.thunderforest.com/maps/opencyclemap/.

Route maps are extremely useful! Also, while choosing a route it would be beneficial to know the weather in the region you will be travelling in. And what if we combine a bike route map with weather data from OpenWeatherMap? Eureka!

Map Editor 2.0 can help us with that!

In recent years, the fight against air pollution has become global. Humanity, at least when we are speaking about developed countries, starts to realize finally that the Earth is our common home which can get not suitable for living in the near future. Atmospheric pollution takes place when substances harmful for living creatures diffuse throughout the surrounding air, and then this destructive activity has its toxic impact later since it causes global changes of climate of the Earth.

Taking into account the great importance of the climate change issue, we at OpenWeatherMap would like to make our own contribution to making this world a better place.

The first version of the APIs includes several data sets: CO (carbon), NO₂ (nitrogen dioxide), O₃ (ozone), SO₂ (sulphur dioxide).

We hope that the air condition data, both current and historical, will give you a great opportunity to create a variety of new applications and analytic services to keep an eye on what we breathe in real time and whether there is any improvement over time.