[FAQ] Where to find .epw weather data?

[This list will be modified over time]

Free resources:

1. The main source is DOE's website:

http://apps1.eere.energy.gov/buildings/energyplus/weatherdata_about...

https://www.energyplus.net/weather

2. One building.com is also coming around > (http://climate.onebuilding.org/). Their data is limited right now but they are working on that and also unlike the first resource the data has been through quality checks.

3. There are a couple of weather files available on EnergyPlus mailing list (https://groups.yahoo.com/neo/groups/EnergyPlus_Support/files/Meteon...) which are generated by MeteoNorm (http://meteonorm.com/).

Commercial:

4. WeatherAnalytics: http://www.weatheranalytics.com/wa/products/data-weather-files/

5. WhiteBox technologies: http://weather.whiteboxtechnologies.com

PS: I started a project to plot all these resources on a single epwmap. #WIP

Replies are closed for this discussion.

Replies to This Discussion

Permalink Reply by Chris Mackey on October 17, 2015 at 11:50am

Abraham,

WeatherAnalytics makes you pay for EPW data that they fabricate from other climate data sets. This "fabrication" process is proprietary and known only to them, such that I am a bit skeptical of it. Sometimes, WeatherAnalytics is your only option but make sure that you check the EnergyPlus user group weather files before going to them:

https://groups.yahoo.com/neo/groups/EnergyPlus_Support/files/Meteon...

You have to make an account for the E+ yahoo group to access these files but, for the epw file access, it is definitely worth it.

Also, hopefully Dragonfly will give us a means of "fabricating" epw data in a manner that is open and we are aware of the assumptions (https://github.com/chriswmackey/Dragonfly). When the dragonfly is past it's pupa stage in a few more months, I will post back here.

-Chris

Permalink Reply by Abraham Yezioro on October 17, 2015 at 12:40pm

Hi Chris,

I'm aware of the Meteonorm, but ... the requested EPW (Indonesia) is not there (and of course not in the E+ site), as far as i remember. So i reminded this WA option.

The DragonFly project sounds interesting. Please update the progress on it.

-A.

Permalink Reply by Tim on April 28, 2016 at 9:41am

This feature is freaking awesome, have been using from its inception, super easy to use, super helpful, great job.

Thank you.

Permalink Reply by Agus Hariyadi on April 30, 2016 at 9:26pm

dear all,

this link:
4. WeatherAnalytics: http://www.weatheranalytics.com/wa/products/data-weather-files/

any idea how to buy weather file from this website?

I need weather file for Manado Indonesia, so I couldn't find in this link:

5. WhiteBox technologies: http://weather.whiteboxtechnologies.com

Or are there any other website that similar to this WeatherAnalytics website before?

Thanks,
Agus

Permalink Reply by Mostapha Sadeghipour Roudsari on May 1, 2016 at 5:18am

Hi Agus, Have you tried to send an email to weatheranalytics directly? They should be able to answer to your question.

Permalink Reply by Agus Hariyadi on May 3, 2016 at 5:03pm

Yes I have email them since last saturday.. but They didn't answer me up until now..

Permalink Reply by huntan on October 18, 2016 at 6:28am

I've recently discovered this site: https://www.wunderground.com/

Looks like they have some weather data not present in E+'s website. Can anyone confirm if this site is credible?

Permalink Reply by fuad al samman on November 17, 2016 at 10:45am

Please, Can I get a epw file to Sana'a Yemen. Thanks to all.

Permalink Reply by Devang Chauhan on January 27, 2017 at 3:30am

Hi All,

For a location for which a weather file is not available from any source, and paying for proprietary services is not an option, is there a way to fabricate weather data?

Chris,

Can Dragonfly help in this regard?

What I have come up with in my search on this is Urban Weather Generator from MIT that generate hourly urban air temperature and humidity values for a location based on weather data for that city. But what I am interested in is rather a full fabricated weather file.

Thanks,

-Devang

Permalink Reply by Julia T on January 27, 2017 at 9:34am

Hi Devang,

I may be saying a huge stupidity, but if there is no other option... may it be worthy to take like 4 epws of the closest places that you can find and create your own file using the interpolation algorithms that meteonorm uses for the same problem? It will never be exact but... don't know, better than nothing

Having a quick look I didn't find the exact algorithms, but these 2 articles may help you

https://www.researchgate.net/profile/Jan_Remund/publication/2414913...

http://www.ibpsa.org/proceedings/BSO2016/p1059.pdf

Permalink Reply by Alvaro Balderrama on June 11, 2017 at 9:10am

Greetings,

I've been looking for an epw file for the city of Santa Cruz de la Sierra - (biggest city in Bolivia but not capital), and there isn't any. Nearby cities have really different situations, so is it possible to edit one nearby as template and create the one for Santa Cruz de la Sierra?

Best regards,