Weak toIceDragonFairy ×1.6

Attacker	Type	Moveset	DPS
Eternatus	PoisonDragon	Dragon TailDynamax CannonLegacy	63.7
Baxcalibur	DragonIce	Ice FangGlaive RushLegacy	49.3
Rayquaza	DragonFlying	Dragon TailBreaking SwipeLegacy	46.8
Haxorus	Dragon	Dragon TailBreaking SwipeLegacy	46.8
Palkia	WaterDragon	Dragon TailDraco Meteor	46.8
Salamence	DragonFlying	Dragon TailDraco Meteor	46.3
Dragonite	DragonFlying	Dragon TailDraco MeteorLegacy	44.1
Dragapult	DragonGhost	Dragon TailBreaking Swipe	44.0
Garchomp	DragonGround	Dragon TailBreaking Swipe	43.2
Reshiram	DragonFire	Dragon BreathDraco Meteor	42.4
Dialga	SteelDragon	Dragon BreathDraco Meteor	42.4
Enamorus	FairyFlying	Fairy WindDazzling Gleam	42.3

Windy boosts the Dragon attacks above. Windy boosts Jangmo-o.

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

Jangmo-o's moveset, CP and shiny All counters Raid board

Questions people ask

What is Jangmo-o weak to in Pokémon GO?

Jangmo-o takes 1.6 times from Ice, Dragon and Fairy.

What's the best counter to Jangmo-o?

Eternatus with Dragon Tail and Dynamax Cannon, worth 63.7 damage per second against Jangmo-o's own defense. The full ranking is above.