The Rainy Lure Module (Japanese: レイニールアーRainy Lure) is an item exclusive to Pokémon GO, introduced on May 4, 2021. It was developed by Professor Willow as an upgrade to the Lure Module.
In Pokémon GO
A PokéStop with an active Rainy Lure Module in map view
The Rainy Lure Module is a PokéStop module used to attract wild Pokémon to the PokéStop's location for 30 minutes, especially Water, Bug and Electrictypes. PokéStops that have an active Rainy Lure Module placed will have rainfall around them. All players can utilize the effect, and any player viewing the PokéStop can see the username of whoever placed the Lure Module. Only one Lure Module can be active at a PokéStop at once, and another Lure Module cannot be placed until the previous one expires.
Like the Lure Module, its effect is similar to that of the Incense but is fixed to a PokéStop rather than to the player.
If standing within range of a PokéStop with a Rainy Lure Module active, a player may evolve a Sliggoo into Goodra for 100.
Boosted spawns
The following Pokémon have increased spawn rates around a Rainy Lure Module.[1]