The Hamlet DLC introduces the Fog as a prominent mechanic in Humid Season, acting as a short event lasting from 1-3 minutes that occurs outdoors. It is indicated by a thick fog that covers the whole screen, reducing the visible area to a small radius around the player.
Players experience fatigue, in which they are weighed down by any wearable items equipped in the Head or Body slot, causing a significant reduction in movement speed. This is indicated by the character stating "This [item] is slowing me down" and seeming hunched forward as they move. Removing any items in the head/body slots will allow the player to move normally. Three exceptions exist to this, which both exist to negate the fatigue caused by fog: The Pith Hat or Cowl worn on the head, allowing the use of the body slot; and the Weevole Mantle worn on the body, allowing the use of the head slot. Using these two items in conjunction during Fog has no added bonus. (Wagstaff 's Spectoggles and items crafted from Spectoggles crafted in the tinkering tab also prevent fatigue)
Players will also experience a high increase in Wetness as the event progresses, due to the high "humidity" of the air. This cannot be reduced by any means unless Purple Grouper or Tropical Bouillabaisse is eaten, one runs for shelter into interiors, or is near a working Oscillating Fan. Tools such as Umbrellas or waterproof clothing are useless in this instance.
Once the Fog clears, heavy rain will occur for another 1-3 minutes, causing increased wetness unless the player is drying off inside the aforementioned shelters. After this, weather will return to being clear, and players may resume their activities with ease or dry off to reduce their wetness.
- In the Hamlet DLC, outdoor exploration is dangerous during Fog due to the limited view. If a player wishes to explore, they are advised to carry the most basic minimums they require to explore, and to not equip any equipment to increase the player's mobility. However this can be averted if the player uses a Pith Hat or Weevole Mantle.
- Players are advised to utilize an Umbrella or waterproof clothing (such as the Snakeskin Hat or Snakeskin Jacket) to reduce wetness from post-fog Rain.