There's no Dennis on the cover - he wouldn't take over until 1974. Instead, it's Biffo the Bear and his best friend Buster who are feeling the cold.
Cover art from this issue was done by legendary Beano artist, Dudley D. Watkins.
From the Archives: Biffo's Bonfire 1964
Archive: Billy Whizz No. 1
12 X-mas Comics: Biffo
12 X-mas Comics: Pup Parade
12 X-mas Comics: Jonah