Acid Rain
Exclusive to: 
This content is available only after activating the 
Shadow Rift
Acid Rain is a weather phenomenon added in Don't Starve Together. It replaces normal rainfall in the Caves during Shadow Rift activity.
Acid Rain is a more dangerous weather condition compared to normal rain due to scarce protective equipment and its strong negative impact on the environment. During such rain, the places where the drops come into contact with the ground smoke, showing the harmful corrosive effect of the acid. Unlike regular rain, Acid Rain does not cause Wetness.
The only biomes where it doesn't rain are: Lunar Grotto and Ancient Archive.
Acid Rain takes away the durability of certain equipped items, accelerates the deterioration of perishable items including food, and causes damage to the player if they don't have appropriate protection. The negative effect depends on the strength of the rain and is dealt every 1.5 seconds:
- Deals up to 3 damage to the character (negated by 100% water resistance).
- Removes .07% freshness from perishable items held in inventory (negated by 100% water resistance, or keeping such items in containers such as a Backpack).
- Reduces durability of equipped Water Resistant Armor (such as the Football Helmet) by 3 hp.
- Reduces the durability of equipped Water Resistant clothing by 3 seconds (excluding the Umbralla, which gets repaired by acid rain while held instead).
Some creatures receive debuffs or buffs during the acid rain:
| Mobs | Attack Damage | Physical Damage Taken | Move Speed |
|---|---|---|---|
       
|
-15% | +25% | -15% |
        
|
+50% | -25% | +15% |
   
|
+50% | +25% | +25% |
Acid Rain also empowers Batilisks, speeding them up by 25%, increasing their damage by 50%, and changing the loot to Batilisk Wing (50%), Guano (30%), Monster Meat (20%), and Nitre (20%). If a player has Nitre in their inventory Batilisks will knock it out as they attack in an attempt to eat it, similar to a Slurtle. Every half day while Acid Rain is in effect Batilisks will descend from the ceiling to attack players with Nitre in their inventory, with the number of Batilisks increasing based on how much Nitre is held.
| Number of Nitre in inventary |
Number of Batilisks on raid |
|---|---|
| 0-1 | 0 |
| 2-3 | 2 |
| 4-5 | 3 |
| 20 | 6 |
If a Rock Lobster is damaged by Acid Rain it will shrink in size and become weaker. After the rain stops they will slowly return to normal size.
Acid Rain will cause underground Ponds to become covered with Nitre Formations. The Pond cannot be fished in until the Nitre is removed.
All Mushtrees will accumulate acid rain on their caps. In this state, the Mushrooms that fall out of them will be slightly spoiled
Tips
- The best item to deal with Acid Rain is the Umbralla. It provides full protection and regenerates its own durability while held in hand during such rain, rather than being degraded faster like other water resistant gear. It can also be placed on the ground and activated for an area of effect of full protection while leaving your equipment slots free.
- One effective way to avoid rain damage is to use Slimy Salve.
- Warly's Fish Cordon Bleu temporarily gives full wetness protection and can negate the adverse effects of Acid Rain, though equipped items and perishables in the main inventory will still be affected.
Trivia
- Acid Rain was introduced in the Terrors Below update.
