You can't "fix" a weather station yourself because they are mapped to your zip code, but EPA makes updates and corrections to weather stations once per year.
But first, we need to determine if your weather station is really wrong. Portfolio Manager is only using weather stations that have complete weather data going back to at least the year 2000. So, while thousands of weather stations exist, we are only using 778 weather stations in the United States, and 153 weather stations in Canada.
- A map of the weather stations used in Portfolio Manager is included in our technical reference document: Climate and Weather (see Figure 1 for the US & Canada and Figure 2 for international).
If you're pretty sure your weather station is incorrect, fill out our form and let us know the specifics.
We get our list of weather stations from the National Climatic Data Center (NCDC), part of NOAA. NCDC updates their data on a regular basis and EPA updates historical data in Portfolio Manager on an annual basis to accommodate any modifications and corrections from NCDC.
Properties outside of the U.S. and Canada need to select their own weather stations when they set up a property because Portfolio Manager does not maintain an inventory of international postal codes.