Weak toRockElectricIce ×1.6

Attacker	Type	Moveset	DPS
Regieleki	Electric	Lock OnThunder CageLegacy	60.0
Zeraora	Electric	Volt SwitchPlasma Fists	51.5
Zekrom	DragonElectric	Charge BeamFusion BoltLegacy	50.3
Xurkitree	Electric	Thunder ShockDischarge	49.7
Glimmora	RockPoison	Rock ThrowMeteor Beam	45.5
Rampardos	Rock	Smack DownRock Slide	45.0
Eternatus	PoisonDragon	Poison JabDynamax CannonLegacy	43.6
Deoxys	Psychic	Charge BeamThunderbolt	43.3
Gigalith	Rock	Lock OnMeteor BeamLegacy	43.2
Electivire	Electric	Thunder ShockWild Charge	43.0
Tyrantrum	RockDragon	Rock ThrowMeteor Beam	42.1
Raikou	Electric	Volt SwitchWild Charge	41.9

Rainy boosts the Electric attacks above. Partly cloudy and Windy boost Trumbeak.

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

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

Questions people ask

What is Trumbeak weak to in Pokémon GO?

Trumbeak takes 1.6 times from Rock, Electric and Ice.

What's the best counter to Trumbeak?

Regieleki with Lock On and Thunder Cage, worth 60.0 damage per second against Trumbeak's own defense. The full ranking is above.