weather-api

I don't see a lot of information available comparing the weather APIs that are available. What is the difference between OpenWeatherMap and Wunderground. I see that the paid version of Wunderground has some higher tiers with more features, but OpenWeatherMap's free tier allows a huge number of uses. Are there implementation tradeoffs that aren't obvious? Here's a comparison of different weather forecast APIs: 7 Weather Forecast API for Developing Apps It contains a comparison of the following: Open Weather Map AccuWeather The Weather Channel Dark Sky APIXU Weather API World Weather Online

Where can I find historical raw weather data for a project I am doing with focus on the USA and Canada. I need temperatures mainly, but other details would be nice. I am having a very hard time finding this data. I really dont want to have to scrape a weather site. Gilbert Le Blanc At the United States National Severe Storms Laboratory Historical Weather Data Archive (note: this has since been retired). Also, the United States National Climatic Data Center Geodata Portal . The United States National Climatic Data Center Climate Data Online . The United States National Climatic Data Center Most

I had been using the following google weather api in my iPhone apps to get 4 day weather forecast. NSString *address = @"http://www.google.com/ig/api?weather=Chicago"; NSString *request = [NSString stringWithFormat:@"%@",address]; NSLog(@"request: %@", request); NSURL *URL = [NSURL URLWithString:request]; NSError *error; NSString *XML = [NSString stringWithContentsOfURL:URL encoding:NSASCIIStringEncoding error:&error]; NSLog(@"XML: %@", XML); NSLog(@"XML lenght: %d", [XML length]); As of yesterday Aug 25th, 2012 I get absolutely nothing back! I don't get any results back. When did this happen?