Fallout New Vegas
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Imp of the Perverse

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Imp of the Perverse

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About this mod

Lets you check the air temperature, dew point, heat index, and relative humidity. Adds to immersion, and will be incorporated into mods to effect things like dehydration and equipment overheating. The numbers are based on real Las Vegas weather statistics.

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Ambient Temperature


This adds the ability to check the current temperature, dew point, heat index, and relative humidity via a :: Today's Weather :: menu item added to the armor section of your Pipboy. As a standalone mod, these numbers won't actually effect anything, though they do reflect real weather data for the Las Vegas area. Other mods can use the values to effect things like dehydration rates, NPC apparel, equipment overheating, weather, and fatigue. I'd also like to figure out a way to add in breath frost when the conditions are right.

As of release 1.2, Ambient Temperature allows you to change the game month. As it is, Fallout New Vegas games begin in October, meaning you'll probably never make it through an entire winter in a single game. Changing the game month will allow you to experience the heat of summer or the cold of winter. It does not effect cell resets.

Compatible Mods:

I've incorporate this mod into Imp's More Complex Needs, Imp's TimeScale Adjuster, Powered Power Armor, HUD Extended, Nevada Skies and Nevada Skies URWLified. Other modders are welcome to use this mod as a resource. Here's a breakdown of the effects Ambient Temperature has on those mods:

Imp's More Complex Needs: Heat Index (humidity corrected air temperature) effects dehydration rate.

Imp's TimeScale Adjuster: Heat Index (humidity corrected air temperature) effects dehydration rate.

Powered Power Armor: Air temperature effects armor overheating.

HUD Extended: Allows Temperature, Relative Humidity, Dew Point, and Heat Index to be displayed on the HUD. This mod requires NVSE, but is highly recommended.

Nevada Skies/URWLified: Causes weather to be seasonal, and allows you to adjust the weather volatility (time between weather changes). Alternatively, the random weather selection mode keeps Ambient Temperature's weather statistics consistant with Nevada Skies' weather statistics, while letting you adjust the probability that the various weather types will occurr.
Nevada Skies - http://www.newvegasnexus.com/downloads/file.php?id=35998
Nevada Skies URWLified - http://www.newvegasnexus.com/downloads/file.php?id=39686


Add the .esm to the .esm section of your load order, before any mods or patches that use it as a resource.


Remove the .esm from your load order, along with any mods that require it as a master.



Added month adjuster
Added elevation dependent temperature
Added elevation dependent relative humidity
Added variable to help identify interior/exterior transitions


Fixed bug with Heat Index calculation
:: Today's Weather :: can now be hotkeyed

For Modders:

The weather stats are stored in the following global values:

AmbientTemperature - current air temperature
DewPoint - effects breath frosting
HeatIndex - humidity adjusted temperature (recommended for calculating dehydration rates)
RelativeHumidity - measure of the dryness of the air

They should be treated as read-only.