Yes, when using SimilarWeb or SEMRush in Clay to find site traffic, the data shown is monthly.
For SEMRush, we retrieve monthly traffic analytics estimates for a given domain. You can specify a complete month for analytics in yyyy-MM format, or if left blank, the most recent complete month's data will be used.
For SimilarWeb, you can retrieve the estimated number of visits to a given domain, which can be segmented by month among other factors.
Both integrations provide monthly traffic data, allowing you to analyze website performance over time.