Heh. My heart says "go for it," but then I took a quick look at the weather forecast and saw a bit of rain on the way. Why don't you write to the association and ask for their advice? Here are the email addresses and numbers from the association website:
Blog sobre el Camino Mozárabe de Santiago
www.almeriajacobea.es
correos electrónicos :
caminomozarabedealmeria@gmail.com
almeriajacobea@gmail.com
mozarabeacci@gmail.com
en los telefonos y whasapp:
619860198/649806150
Remember that the first few sections of the Mozarabe from Almeria are quite hard going - river bed walking. Under rain clouds, you might not enjoy it so much.... whereas in spring with blossom on the almond and orange trees ... it's still hard work, but the scenery is a bit better.
Also note that heading into December, the stages near Granada will be getting quite chilly - you will pass the foothills of the Sierra Nevada.
I guess I'm leaning toward advising you to wait for spring. But, you know, if there's a cheap ticket to Almeria, you could head down for a few days to explore the city, visit Cabo de Gata, meet up with the association people and plan your spring Camino. I can't think of many things I'd rather do in early December.