Is it normal for the keyword difficulty tool to be moderate one month and highly competitive another?

[lwilkins]

I designed a website a month ago and found moderate keywords to use through the SEOmoz tool. Now when I search them again, they are all highly competitive. Is it seasonal? Should I redo the keywords?

[lavellester]

Hi

I think it takes data from Google keywords tool data to determine keyword difficulty so I guess if the Google keyword tool data changes then this would be reflected in the keyword difficulty tool results.  although don't quote me on this!

[EricaMcGillivray]

Keywords can definitely flux per season. We've also been scrubbing some of our data, and Lavellester is correct that if some of our data sources change their opinion, our tool will change too.