Weather was the environmental conditions caused by the atmosphere.
In the 20th century, the US military discovered that the Stormcore could be used to affect the weather. (PROSE: Drift)
On Earth in the 21st century, various devices were used to control the weather, such as the Weather Control Unit (TV: The Seeds of Death) and the Gravitron. (TV: The Moonbase) In the second half of the 2100s, a breakdown in weather control systems caused the Ozone Purge. (PROSE: Lucifer Rising)
The Ninth Doctor's sonic screwdriver was capable of altering the weather. He used it to make it rain to defeat Zargath's invasion. (COMIC: Death to the Doctor!)
When the Master opened the Eye of Harmony inside the Doctor's TARDIS on New Year's Eve 1999, it caused freak weather patterns all over Earth. (TV: Doctor Who)
The Saturnyns attempted to control the weather in Venice in 1580 to turn the Earth into their new home. (TV: The Vampires of Venice)
River Song's vortex manipulator was modified with a weather app. (AUDIO: The Sonomancer)