I'm looking for a historical USA (specifically Chicago, IL) weather forecast dataset. Temperature forecasts would suffice, though the more data, the merrier. I know this has been asked a lot of times in the past, but nothing worked for me. Here's what I found so far:

  • Both links in the accepted answer to this question are broken
  • DarkSky API can't provide historical forecasts, but only historical observations and future forecasts
  • NOAA's Weather Prediction Center archives only provide pictures (either GIFs or PDFs), with no textual temperature forecast data
  • The data in this question doesn't seem to suit my needs (not sure how to parse some of it, and the parts that I have been able to parse don't contain historical Chicago forecasts). The answer to that question is relevant only to Europe, and I need USA weather forecasts
  • The best thing I could find was NOAA's Archive Information Request System and Iowa State Mesonet. Both provided historical weather forecasts for Chicago, but they were both very coarse and verbal. For example, the following paragraph appears in a huge text file: ".TODAY...Cloudy. Showers likely in the morning, then a chance of showers in the afternoon. Highs around 70. Northeast winds 10 to 20 mph. Chance of precipitation 60 percent." This thing would be difficult to parse, and would probably not be worth it because it just says "Highs around 70".

So is there anywhere from which I could get historical data that:
1. Contains Chicago temperature forecasts
2. Is easy to parse (e.g. in csv format)

  • 1
    I fixed the dead links in opendata.stackexchange.com/a/2013/1511, please let us know if it's useful
    – philshem
    Sep 18 '18 at 11:00
  • Thanks, but none of the sites contained historical weather forecasts for Chicago (in a format that is easy to parse). Moreover, I've contacted NOAA's support, and they said they don't have CSV/JSON/any other "nice" format for this kind of things.
    – ezer1337
    Sep 23 '18 at 8:37
  • This is not an answer. I am just typing my question here since I am not able to comment. I will delete this soon Since its been a while, I am just curious to know if you found an answer to your question. Jun 7 '19 at 19:52

openweathermap.org provides historical forecasts by location for the past 3 years. You purchase the data by location and 3 years of historical forecasts that you can download immediately is available for $45 dollars I believe. I searched long and hard for somebody that provided historical forecasts. Everyone provides historical weather but not the forecasts. Even the US government through NOAA starts purging forecasts after 90 days.

  • hardly open data, despite their domain name having "open" and ".org"
    – philshem
    Jan 22 at 7:49
  • I agree. The cost is not the best but it provides exactly what the person is asking for in csv format. Seems like he may have been looking for a long time for exactly what openweathermap.org is providing for a fee. I have also looked for a long time for this type of data and to me the $45 dollars was worth it for me to be able to move forward as opposed to being stuck forever.
    – Lockman
    Jan 22 at 15:04

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