Pokémon GO is in the process of being updated to version 0.85.2 for Android and 1.55.1 for iOS devices. Details from our development team:
50 additional Pokémon originally discovered in the Hoenn region can be caught.
Real-world weather conditions are now reflected in Map View, in battle, and when catching Pokémon.
Added a weather icon that can be tapped to highlight which Pokémon types are more likely to appear in the surrounding area and will be affected by current weather conditions.
Added the beta feature to create battle parties that allow Trainers to save teams of up to six Pokémon to take into Gym battles and Raid Battles.
Increased Pokémon Storage maximum to 1,500.
Updated the battle interface to include a dedicated button for performing a Charged Attack.
Various bug fixes and performance updates.
—The Pokémon GO team