Weak toFireElectric ×1.6

Attacker	Type	Moveset	DPS
Blacephalon	FireGhost	IncinerateMind BlownLegacy	34.0
Regieleki	Electric	Lock OnThunder CageLegacy	31.7
Reshiram	DragonFire	Fire FangFusion FlareLegacy	28.2
Zeraora	Electric	Volt SwitchPlasma Fists	27.7
Zekrom	DragonElectric	Charge BeamFusion BoltLegacy	27.0
Xurkitree	Electric	Thunder ShockDischarge	26.7
Chandelure	GhostFire	Fire SpinOverheat	25.9
Cinderace	Fire	Fire SpinPyroball	25.5
Volcarona	BugFire	Fire SpinOverheat	25.2
Darmanitan	Fire	Fire FangOverheat	25.1
Blaziken	FireFighting	Fire SpinBlast BurnLegacy	24.3
Moltres	FireFlying	Fire SpinOverheat	24.0

Rainy boosts the Electric attacks above. Snow and Windy boost Celesteela.

Level 40, 15 attack IV, costed against Celesteela's own defense and typing, one per evolution family.

Celesteela's moveset, CP and shiny All counters Raid board

Questions people ask

What is Celesteela weak to in Pokémon GO?

Celesteela takes 1.6 times from Fire and Electric.

What's the best counter to Celesteela?

Blacephalon with Incinerate and Mind Blown, worth 34.0 damage per second against Celesteela's own defense. The full ranking is above.