temperature

stage one: lower than -54

stage two: -48 to -53

stage three: -40 to -47

stage four: -32 to -39

stage five: -24 to -31

stage six: -16 to -23

stage seven: -8 to -15

stage eight: 0 to -7

stage nine: 1 to 8

stage ten: 9 to 16 from here down Stage Two Wind lowers the effective cold by 1,

stage eleven: 17 to 32

stage fourteen: 33 to 40

stage fifteen: 41 to 48

stage fifteen: 49 to 56

stage sixteen: 55 to 64

stage seventeen: 65 to 72

stage eighteen: 73 to 80

stage nineteen: 81 to 88 - caution

stage twenty: 89 to 96 - extreme caution

stage twenty-one: 97 to 104 - from here up 0% humidity lowers this by one

stage twenty-two: 105 to 112 - danger

stage twenty-three: 113 to 120 - from here up 0% humidity lowers this by two

stage twenty-four: 121 to 128

stage twenty-four 129 to 136 - extreme danger

stage twenty-five: 137 to 144 - 0% humidity lowers by 2

stage twenty-six: 145 to 152

stage twenty - seven: 153 to 160

Lake of Fire

160 or hotter

2

Unbearable heat

128 - 160

3

Hot

96 - 128

4

Warm

64 - 96

5

Mild

32 - 64

6

Cool

1 to 32

7

Cold

0 to -31

8

Arctic cold

-32 to -63

9

Stygian cold

-64 or lower

Lake Of Fire

A creature exposed to lake of fire environments requires 100% more water and must succeed on a DC 15 Constitution saving throw once every 3 hours or gain one level of exhaustion.

Unbearable Heat

A creature exposed to unbearable heat environments requires 100% more water and must succeed on a DC 15 Constitution saving throw once every 6 hours or gain one level of exhaustion.

Hot

A creature exposed to hot environments requires 50% more water and must succeed on a DC 15 Constitution saving throw once every 12 hours or gain one level of exhaustion.

Warm

A creature exposed to warm environments requires 25% more water and must succeed on a DC 15 Constitution saving throw once a day or gain one level of exhaustion.

Creatures wearing heavy armor, or who are clad in traveling clothes, have disadvantage on the saving throw.

Creatures adapted to heat reduce the effects by one heat category.

Creatures with fire resistance reduce the effects by two heat category.

Creatures with fire immunity reduce the effects by three heat categories.

Cool

A creature exposed to cool environments requires an additional ration of food and must succeed on a DC 15 Constitution saving throw once a day or gain one level of exhaustion.

Cold

A creature exposed to cold environments requires an additional ration of food and must succeed on a DC 15 Constitution saving throw once every 12 hours or gain one level of exhaustion.

Arctic Cold

A creature exposed to arctic cold environments requires two additional rations of food and must succeed on a DC 15 Constitution saving throw once every 6 hours or gain one level of exhaustion.

Stygian Cold

A creature exposed to stygian cold environments requires two additional rations of food and must succeed on a DC 15 Constitution saving throw once every 3 hours or gain one level of exhaustion.

Creatures in traveling gear reduce the effects by one cold category.

Creatures adapted to the cold reduce the effects by one cold category

Creatures with cold resistance reduce the effects by one cold category.

Creatures in cold weather gear reduce the effects by two cold categories.

Creatures with cold immunity reduce the effects by three cold categories.

wind

stage zero: calm (0) increase temperature effects one level, sailing ships are becalmed in a sea is as smooth as a mirror

stage one: light wind (1-3) smoke shows direction of the wind

stage two: light breeze (4-7), sailing ships move at quarter speed speed, the light breeze is felt on your face, leaves rustle, weather vanes point in the direction of the wind

stage three: gentle breeze (8-12), sailing ships move at half speed, leaves and small twigs are in constant motion, wind extends light flags

stage four: moderate breeze (13-18), sailing ships move at three-quarter speed, raises dust and small twigs, moves small branches

stage five: fresh breeze (19-24), sailing ships move at full speed, small treas in leaf begin to sway

stage six: strong breeze (25-31), sailing ships move at one and one-quarter speed, large branches in motion, umbrellas are used with difficulty

stage seven: near gale (32-38), sailing ships move at one and one-half speed, whole trees in motion, inconvenience when walking against the wind

stage eight: gale (39-46), sailing ships move at double speed, sailing ships move at one and three-quarter speed, breaks twigs off trees, generally impedes progress

stage nine: severe gale (47-54), sailing ships move at double speed, high waves with spray affecting visibility, causes light structural damage

stage ten: storm (55-63), sailing ships move at one and one half speed as they trim sails, waves tumbling becomes heavy and shock like, trees are up rooted and structural damage occurs

stage eleven: violent storm (56-63) causes damage to structures and creatures, sailing ships move at full speed as they trim sails, wave large enough to hide small and medium ships temporarily, extensive structural damage

stage twelve: category one hurricane (74-95) damage to structures

stage thirteen: category two hurricane (96-110) extensive damage to structures and creatures

stage twelve: category three hurricane (111-129) devastating damage to structures and trees

stage twelve: category four hurricane (130-156) catastrophic damage to structures and trees

stage twelve: category five hurricane (157+) at sea the air is filled extreme catastrophic damage to structures and trees

stage 2 or 3, light wind lowers cool or colder temperatures by one level

stage 4 or 5, moderate wind imposes disadvantage on ranged weapon attack rolls

stage 6 or 7, strong wind: all of the above and disadvantage on wisdom (perception) checks that rely on hearing, extinguishes open flames, disperses fog, and smoke, no long ranged weapon attacks, and flyers moving against the wind must spend 1 extra foot of movement

stage 8 or above, gale: all of the above plus any creature moving against the wind must spend 1 extra foot of movement for each foot moved except for flyers who cannot move against the wind and spend 1 extra foot to move perpendicular to the wind, and all ranged attacks have disadvantage except non-firearm ranged weapon attacks which automatically fail, plus in a desert or other area with lots of sand it can create a sandstorm that lightly obscures any thing in it, casting a spell requires a concentration roll

stage 10 or above, storm: all of the above and any creature moving in a storm must spend 2 extra feet of movement to move against the storm or extra foot of movement for each foot moved otherwise, except flying creatures which must land or get carried away at their fly speed by the wind, no ranged attacks of any kind

precipitation

stage one: clear

stage two: clear plus light rain, freezing rain, light snow

stage three: partly cloudy

stage three: partly cloudy plus rain, hailstorm, or snow

stage four: overcast

stage five: overcast plus torrential rain, sever hailstorm, or blizzard

clear the unobstructed outdoor light is sunlight

light rain, and extinguishes small flames and gets everything wet

freezing rain extinguishes small flames, gets everything wet, and may cause icy terrain

light snow extinguishes small flames

partly cloudy the outdoor light is bright light

rain imposes disadvantage on wisdom (perception) checks that rely on hearing and extinguishes all but magical open flames

hailstorms cause all creatures near it to have disadvantage on wisdom (perception) checks that rely on hearing, extinguishes all but the largest open flames, and attacks each creature in the open with a +0 bonus for 1d6 bludgeoning damage

snow causes everything within the area of snow to be lightly obscured and extinguishes all but magical open flames

overcast the outdoor light is low light

torrential rain causes everything within its area to be lightly obscured, imposes disadvantage on nearby wisdom (perception) checks that rely on hearing and extinguishes all but magical open flames

heavy hailstorms cause everything within the area of a heavy hailstorm to be lightly obscured, all creatures near it have disadvantage on wisdom (perception) checks that rely on hearing, extinguishes all but magical open flames, and attacks each creature in the open with a +0 bonus and advantage for 1d8 bludgeoning damage