I am analyzing weather data from 2 sites, and trying to determine if they are correlated. For the most part, I am able to run linear regressions and Pearson's correlations since the data are relatively normal. However, when looking at relative humidity, it obviously has an upper limit in place (100%; it would have a lower limit of 0 as well, but this is not applicable, as I'm only looking at maximum RH). One site reaches 100% RH frequently; the other occasionally does.
The Question: Is Spearman's
\rho appropriate in the case of data with upper limits?