Biome, time, weather, altitude, what's lit nearby, whether you're soaked, what you're wearing. Each pushes how warm or cold you feel.
Same math the server runs. Drag the controls. The thermometer is what your character would feel right now.
Atom Climate Explorer
Pick a biome, time of day, weather, and a heat source. See what your character would feel.
biome
Snowy plains
base +2°c
altitude
y = 64the day plays out · click to scrub time
midnightdawnnoonduskmidnight↑ 12:00
81%
freezing
19%
cold
0%
comfortable
0%
warm
0%
burning
right now · 12:00
9.0°
Coldair 9.0°
No extra effects active, High noon.
stress
+0.60
/sec
till slow
~59
sec
till damage
~2.4
min
this day swings -2° to 9°
the curve of the day
00:00low -2° · high 9° · feels 8.9° at 12:0024:00
what will kill you here
From 06:00 to 06:00 you're cold or freezing.
No heat source nearby. Light a campfire or get under cover.
Rain steals another −4.2° off how you feel.
Wet clothes evaporate. The colder you are, the worse it stings.
Standing here at midnight with the open sky overhead drops you to -2°.
Open sky is the worst place to be at night in a cold biome.
the ten things that move the needle
Where you are
Every biome has a base temperature. A desert is hot, a snowy plain is cold.
−8°C to +32°C baseTime of day
Noon hottest, midnight coldest. ±4°C across the day. Only under open sky.
±4°CWeather
Rain cools the air a few degrees. Thunder more. Indoors the weather doesn't reach you.
−5°C rain · −8°C thunderstormNatural cover
A roof blocks sun, rain, and the cold of night. Caves are stable. Trees give partial cover.
no sky = no weatherRooms & doors
Sealed rooms hold their warmth. An open door bleeds heat to outside.
closed door ≈ 95% sealedAltitude
High peaks run cool. Deep caves run warm. Sea level is the standard.
−6°C peak to +4°C deepHeat sources
Campfires, lit furnaces, torches, lava warm the air. Ice and snow chill it. Linear falloff out to ten blocks.
linear · ≤10 blocksWetness
Rain or swimming gets you soaked. Wet clothes evaporate and cool you fast. Up to 6°C colder.
−6°C soakedWhat you wear
Three numbers per piece. Warmth raises felt temp. Solar gain bakes you under sun, leather reflects, metal cooks. Insulation slows stress build-up.
leather wins cold and desertWhat you're doing
Standing still in cold is worst. Sprinting warms you up but bakes you faster in heat. Jumping gives a small burst.
still ×1.15 cold-stress · sprint ×1.40 heat-stress