FAQ

Here are the answers to frequently asked questions.

I can’t find the data I’m looking for, or am having technical issues, how can I get assistance?

Please send us a message through the contact page and we’d be happy to assist you.

Can this data be used in legal proceedings or for important decisions?

Regardless of the source, we STRONGLY encourage you to have one of our meteorologists verify any climate data before using it for important decision making or legal proceedings. We are able to ensure the data is accurate and appropriate for your use. Every effort has been made to maintain the quality, accuracy, and integrity of our database. However, it contains billions of data points and it is not physically possible to verify each one. Weatherlogics takes no responsibility for decisions or actions taken using data retrieved from this website. Please refer to the terms of service page for full details regarding our policies with respect to data usage.

Why should I use your climate data when I can get similar information elsewhere?

Our climate database provides the most complete and highest quality climate data for Canada. What does this mean?

All weather stations have the longest available and most complete climate history possible. In many locations, climate histories are broken up over time. For example, Winnipeg’s climate history is broken into 4 different stations:

  • St. John’s College: 1872-1938.
  • Winnipeg James Armstrong Richardson Airport: 1938-2008.
  • Winnipeg AWOS: 2008-2013.
  • Winnipeg A CS: 2013-2019.

Winnipeg’s history goes from 1872-2019, but if you try to download data, the longest single period you’ll find is 1938-2008. To get the complete history, you’ll need to figure out the complex process of combining these stations together, to get the full record from 1872 to 2019. The Weatherlogics database has already completed this process. The same situation occurs in hundreds of weather stations across the country.

In addition to completeness, all data are quality-controlled to remove erroneous values. Missing values have also been recovered whenever possible.

How are your records different from those I can find on other websites?

Our records are based on complete climate histories for every location. You must be very cautious when using records from other websites, because they are often based on incomplete data. For example, Winnipeg’s “records” are often based on Winnipeg James Armstrong Richardson Airport, which only has data from 1938-2008. These records have not been updated from 2008-2019 and don’t include data from 1872-1938. Our records are complete and include all available data.

In addition to completeness, you can also find unique records on our website. Maybe you’d like to search for dewpoint or relative humidity records – with our search forms this is easy! We can also accommodate custom date ranges and our APIs can search for records with consecutive days of certain weather conditions.

Lastly, our records are updated frequently and pass through quality control as soon as we receive the data. Hourly records are updated on an hourly basis, daily records are updated daily, and monthly records are updated on the first day of each month. On other websites, records are often updated infrequently, or not at all.

How are your normals different from other websites?

Like records, our normals are based on complete data. Other websites often show normals based on incomplete data. Continuing the example from above, the 1981-2010 normals for Winnipeg are only based on data from 1981-2007, because they are only calculated using one station (Winnipeg James Armstrong Richardson Airport). Our database calculates the correct normals using data from the entire 1981-2010 period. Other locations are more egregious, like Moose Jaw, where "1981-2010 normals" are only based on 1981-1997 data.

Our climate queries also allow for the calculation of normals for any desired period. Maybe instead of 1981-2010 normals, you’d like to see more recent values from 1990-2019. With our search forms this is easy!

Lastly, since our data is updated constantly, our normals for the upcoming 1991-2020 climate period will be available for all locations as of Jan 1, 2021.

What do the flags mean?

During our quality-control process, flags are assigned to each data point. Most flags are 'OK', indicating that the data value passed all QC checks. However, sometimes flags are not 'OK', in which case the flag should be looked up to see if there is an issue with the data. A table with the meaning of all flags can be found on the metadata page