Weather

You can pick weather to fit your campaign or roll on the Weather table to determine the weather for a given day, adjusting for the terrain and season as appropriate.

##### WEATHER

 15-17
 18- 20

 13-17
 18-20

 13-17
 18-20

### Extreme Cold

Whenever the temperature is at or below 0 degrees Fahrenheit, a creature exposed to the cold must succeed on a DC 10 Constitution saving throw at the end of each hour or gain one level of exhaustion. Creatures with resistance or immunity to cold damage automatically succeed on the saving throw, as do creatures wearing cold weather gear (thick coats, gloves, and the like) and creatures naturally adapted to cold climates.

### Extreme Heat

When the temperature is at or above 100 degrees Fahrenheit, a creature exposed to the heat and without access to drinkable water must succeed on a Constitution saving throw at the end of each hour or gain one level of exhaustion. The DC is 5 for the first hour and increases by 1 for each additional hour. Creatures wearing medium or heavy armor, or who are clad in heavy clothing, have disadvantage on the saving throw. Creatures with resistance or immunity to fire damage automatically succeed on the saving throw, as do creatures naturally adapted to hot climates.

### Strong Wind

A strong wind imposes disadvantage on ranged weapon attack rolls and Wisdom (Perception) checks that rely on hearing. A strong wind also extinguishes open flames, disperses fog, and makes flying by nonmagical means nearly impossible. A flying creature in a strong wind must land at the end of its turn or fall. A strong wind in a desert can create a sandstorm that imposes disadvantage on Wisdom (Perception) checks that rely on sight.

### Heavy Precipitation

Everything within an area of heavy rain or heavy snowfall is lightly obscured, and creatures in the area have disadvantage on Wisdom (Perception) checks that rely on sight. Heavy rain also extinguishes open flames and imposes disadvantage on Wisdom (Perception) checks that rely on hearing.

### High Altitude

Traveling at altitudes of 10,000 feet or higher above sea level is taxing for a creature that needs to breathe, because of the reduced amount of oxygen in the air. Each hour such a creature spends traveling at high altitude counts as 2 hours for the purpose of determining how long that creature can travel. Breathing creatures can become acclimated to a high altitude by spending 30 days or more at this elevation. Breathing creatures can't become acclimated to elevations above 20,000 feet unless they are native to such environments.

## Wilderness Hazards

This section describes a few examples of hazards that adventurers might encounter in the wilderness. Some hazards, such as slippery ice and razorvine, require no ability check to spot. Others, such as defiled ground, are undetectable by normal senses.

The other hazards presented here can be identified with a successful Intelligence (Nature) check. Use the guidelines in chapter 8 to set an appropriate DC for any check made to spot or recognize a hazard.

### Desecrated Ground

Some cemeteries and catacombs are imbued with the unseen traces of ancient evil. An area of desecrated ground can be any size, and a detect evil and good spell cast within range reveals its presence. Undead standing on desecrated ground have advantage on all saving throws. A vial of holy water purifies a 10-foot-square area of desecrated ground when sprinkled on it, and a hallow spell purifies desecrated ground within its area.

### Frigid Water

A creature can be immersed in frigid water for a number of minutes equal to its Constitution score before suffering any ill effects. Each additional minute spent in frigid water requires the creature to succeed on a DC 10 Constitution saving throw or gain one level of exhaustion. Creatures with resistance or immunity to cold damage automatically succeed on the saving throw. as do creatures that are naturally adapted to living in ice-cold water.

### Quicksand

A quicksand pit covers the ground in roughly a 10-footsquare area and is usually 10 feet deep. When a creature enters the area, it sinks ld4 + 1 feet into the quicksand and becomes restrained. At the start of each of the creature's turns, it sinks another 1d4 feet. As long as the creature isn't completely submerged in quicksand, it can escape by using its action and succeeding on a Strength check. The DC is 10 plus the number of feet the creature has sunk into the quicksand. A creature that is completely submerged in quicksand can't breathe (see the suffocation rules in the Player's Handbook). A creature can pull another creature within its reach out of a quicksand pit by using its action and succeeding on a Strength check. The DC is 5 plus the number of feet the target creature has sunk into the quicksand.

### Razorvine

Razorvine is a plant that grows in wild tangles and hedges. It also clings to the sides of buildings and other surfaces as ivy does. A 10-foot-high, 10-foot-wide, 5-foot-thick wall or hedge of razorvine has AC 11, 25 hit points, and immunity to bludgeoning, piercing, and psychic damage. When a creature comes into direct contact with razorvine for the first time on a turn, the creature must succeed on a DC 10 Dexterity saving throw or take 5 (1d10) slashing damage from the razorvine's bladelike thorns.

### Slippery Ice

Slippery ice is difficult terrain. When a creature moves onto slippery ice for the first time on a turn, it must succeed on a DC 10 Dexterity (Acrobatics) check or fall prone.

### Thin Ice

Thin ice has a weight tolerance of 3d10 x 10 pounds per 10-foot-square area. Whenever the total weight on an area of thin ice exceeds its tolerance, the ice in that area breaks. All creatures on broken ice fall through.