I was amused when I saw August is August 
But yeah, Solace/Solis, along with that village, Solas. I kind of wonder why.
Did they run out of names?
In this case it seems more like it's Sol in the sense of the sun. Many of the names are in the kinda Latin that is Tevene
Verimentis I don't really have a clue? Something about truth?
Pluitanis is Rainy
Nubulis is Cloudy
Eluviesta is flooding
Molioris is... kind?
Ferventis is burning
Solis is sunny
Matrinalis is motherly? Or the month to get married in?
Parvulis is something to do with childhood or being small?
Frumentum is harvest
Umbralis is shadowy
Cassus is empty/fruitless
edit: It's rather reminiscent of the
French Republican Calendar.