There are hills to the upwind side of Faro - NW and N - so perhaps there
is
a föhn effect. That might also explain the extremely low RH - 6% at
12.00
UTC today - unless the instrument is faulty. Notice also the reports of
"smoke" - brush fires perhaps ?

So, can there be a Foehn effect without clouds over the hills? I thought the
Foehn effect was due to the descending air (downwind side of the hills)
being heated at the dry adiabatic rate, rather than the moist one, at which
it cools while ascending at the windprone side of the hill.

Yannis, SE Athens
+26.8C, RH 55%, SLP 1007.3 hPa