That is not a huge temp swing but yeast really don't like their temp going up and down. Stabilize it in a water bath, the mass of the water bath will keep temps from fluctuating so much and you can use ice if needed.
Something is always fermenting....
"It's Bahl Hornin'"
Kegged: Sour Saison, Pale Ale, Aggie Ale, Firestone DBA, De Koninck Blonde
Bottled: Belgian Quad (Grand Reserve), Derangement (Belgian Dark Strong)
On Deck: Pliny the Younger