1. Introduction
   
2. Ambient Temperature
   
3. Temperature and the Fuse Box
   
4. The Ghost and Temperature
   
5. The Hantu
   
6. Conclusion
   
7. Credits and References

This is a more in-depth guide about Temperature, one of the mechanics in Phasmophobia, and assumes you have read other guides that give you basic information on, at least, the Tier I Thermometer. While some information in this guide, and their examples, is from a previous version of Phasmophobia it has been updated to include any recent changes and should still be valid until the weather or temperature systems are overhauled again.

The game has a weather system which, in turn, affects the temperature ranges outside and inside a given location. Most difficulties pick a random weather although you can set a specific weather under Custom Difficulty and certain weekly challenges might also have pre-picked weather.

The ambient temperature is the temperature is, more or less, the outdoor temperature given the current weather. This isn't a precise value but more of a range, for example, the range for Sunrise weather would be around 10 to 18 C or 50 F to 64.4 F, and for Clear Skies or Fog it would be 8 to 15 C or 46.4 to 59 F.

The maximum temperature of a room at any location has been reported at anywhere from 64.4 F to well over 70 F and all rooms will start approximately there on Amateur difficulty. Once the Exit Door has been unlocked and opened it will begin to be affected by the Ghost's presence as well as the status of the Fuse Box.

it has been reported on all other difficulties, possibly also Custom Difficulty, the room temperatures will start at ambient temperature, even if the Fuse Box begins in an ON state, and will slowly raise while the Fuse Box is on and slowly lower when the Ghost is present in a room.

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Example:

An investigation at Tanglewood has Sunrise weather and Amateur difficulty and thus all of the rooms inside the location should be around 18 C / 64 F, possibly higher, before the Exit Door is unlocked and opened.

A similar investigation but on Intermediate difficulty should have all of the rooms be around 10 C / 50 F.

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The above table gives an approximate idea of the ranges and lowest possible ambient temperatures based on weather. The freezing breath effect will always be present at ambient temperature with Snow weather.

As previously stated the status of the Fuse Box has a direct effect on room temperatures at the location but not at areas outside of the location such as the Truck.

The Fuse Box being ON will raise the temperature by approximately 0.04°C to 0.05°C (0.08°F to 0.09°F) per second so that it takes somewhere around 12 to 20 seconds to raise a single degree. This is an extremely rough estimate based on community notes so may not be the actual values which, as far as I know, haven't been confirmed by the developers.

If the Fuse Box is OFF then temperatures will start to naturally drift down to ambient temperature, potentially the lowest ambient temperature, but of course can be driven down even further and faster by the presence of the Ghost.

The presence of the Ghost will lower the temperature by ~0.08°C to 0.1°C (0.14°F to 0.18°F) per second so around 7 to 10 seconds for the Ghost to lower it by a single degree which is faster than the Fuse Box raises the temperature. This is also an extremely rough estimate based on community notes so may not be the actual values in the game and thus haven't been confirmed by the developers.

The Ghost can potentially drop any room temperature to 1°C or 33.8°F although it has been reported that some Ghosts have dropped it to decimal ranges between 0 and 1°C or somewhere between 32.8°F and 33.8°F. When they leave a room it will start to raise again to ambient temperatures or higher if the Fuse Box is currently ON.


If a Ghost has Freezing Temperature evidence it'll eventually drop a room temperature below 0°C or 32.8°F and most likely eventually drop that to -10°C or 14°F but this is completely dependent on how much the Ghost has been in a room. It can take a considerable amount of time for temperatures to confirm Freezing Temperatures and some players suggest turning off the Fuse Box to allow for temperatures to drop even quicker.

One ghost, the Hantu, is based around the temperature mechanic. It prefers cold temperatures, because, during a Hunt it is faster in cold rooms and slower in warmer ones. This also means it tends to turn OFF the Fuse Box more often and will never turn ON the Fuse Box.

While rooms start at maximum temperature on Amateur difficulty they usually start in the ambient temperature range on other difficulties. This can mean that an early hunting Hantu may have a significant advantage before room temperatures have begun to increase when the Fuse Box is turned ON.


The obvious suggestion is to turn ON the Fuse Box and to keep it ON -- turning it back anytime the Hantu turns it off -- unless you specifically want the Hantu to be faster during a Hunt. If you listen carefully enough during a Hunt you can hear it change speeds, often suddenly, as it moves between different rooms at a location. It will probably be fastest in its favorite room but that is totally dependent on how much time it has spent there lowering the temperature to freezing.

If the Fuse Box has been turned OFF for a while, has only recently been turned ON, or is BROKEN then you should consult the weather type for which temperatures and, more importantly, speeds you should expect inside the location.

You should, however, keep in mind that the presence of the Hantu during the hunt will still affect the temperature of the room. If the hunt has a longer duration and it stays in a room it will make the room colder thus gaining more of a speed boost. This is an important consideration for anybody who is attempting to loop the ghost around a single room as it may gain in speed and, thus, distance during the course of the looping attempt.

Weather and temperature mechanics play an important role in Phasmophobia which aren't immediately obvious, especially to newer players. However, having a firm grasp of how these mechanics work is what often separates a novice from a more experienced player.

I hope this guide has helped you to hone your skills in dealing with temperature instead of it being a seemingly random value that applies on your thermometer!

Contributors to Phasmophobia Wiki. “Weather | Phasmophobia Wiki | Fandom.” Phasmophobia Wiki, Fandom, Inc., https://phasmophobia.fandom.com/wiki/Weather. Accessed 24 Sept. 2023.

Contributors to Phasmophobia Wiki.. “Temperature | Phasmophobia Wiki | Fandom.” Phasmophobia Wiki, Fandom, Inc., https://phasmophobia.fandom.com/wiki/Temperature. Accessed 24 Sept. 2023.

Contributors to Phasmophobia Wiki. “Hantu | Phasmophobia Wiki | Fandom.” Phasmophobia Wiki, Fandom, Inc., https://phasmophobia.fandom.com/wiki/Hantu. Accessed 24 Sept. 2023.