The players in my D&D campaign will soon be headed into the Yatil Mountains in search of the lost treasure hoard of the Archmage Iggwilv (see module S4: The Lost Caverns of Tsojcanth). An adventure set among high mountain passes really calls out for guidelines for handling weather and temperature, which the published module doesn't speak to at all (except for the perfunctory inclusion of avalanches and rockslides on the random encounter table). The World of Greyhawk boxed set of course has a set of tables for determining weather, but they are famously unwieldy, at least for realtime at-the-table use.
In order to remedy that, I made my own set of weather tables for the Yatil Mountains (similar to the weather table in Brink of Calamity which I assume all of you are familiar with - daily [or as often as you feel ike making them] rolls to determine temperature, cloud cover/precipitation, and wind speed, all scaled to match the chart in the Control Weather spell on p. 52 of the 1st edition AD&D Players Handbook) and present them here for the use of anyone else who might be considering running that adventure (or any other adventure set in an environment roughly analogous climate-wise to the Front Range of the Rocky Mountains):
https://drive.google.com/file/d/1xPXlRu_e5sjj7ScvYYJvYKoMpDuEDjSZ/view?usp=sharing
Enjoy!
