Fallout 4 added settlement building to the franchise for the first time. You can create a bustling city filled with settlers or a heavily fortified vault. The game received a few workshop DLCs after release that added even more items and machines that you can make.

The weather randomly cycles as you explore the Commonwealth, bringing conditions including clear skies, rain, and radstorms. Radstorms will make the landscape a sickly shade of green and build up RADs as you explore in the now toxic environment. Weather Change Shells were added in the Contraption Workshops DLC. Here is how you can use them and change the weather to your liking in Fallout 4.

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How to Change the Weather in Fallout 4

Build a Generator

fallout-4-generator

The first step is building a generator in your settlement, which will give power to any devices that you attach them to. Larger generators create more power but take more materials to build, but you only need a Small Generator to use the shells. Here are the requirements to build one. Trashcan Carla is a vendor who regularly travels through Sanctuary Hills and is a good resource for most junk you may need.

Generator - Small

  • Two Gear
  • Four Steel
  • Two Rubber
  • Two Copper
  • One Ceramic

Build a Firework Mortar

fallout-4-firework-mortar

Open your workshop menu and go to the miscellaneous section of power. Here you can find firework mortars, which are angled mortars that shoot straight up. Both take the same materials and will work for Weather Change Shells.

Firework Mortar

  • Two Wood
  • Two Steel
  • One Asbestos
fallout-4-firework-mortar-attach-generator

Once you've made the firework mortar, attach it to the generator to give it power. Highlight the generator and press the Triangle/Y button to drag the wire to the mortar.

Craft Weather Change Shells

fallout-4-weather-change-shell-chemistry-station

There are three types of shells that you can make. These are Clear, Radstorm, and Rain Shells, which you can craft at any Chemistry Station.

Weather Change Shell - Clear

  • One Adhesive
  • One Cloth
  • One Fertilizer
  • One Gold

Weather Change Shell - Radstorm

  • One Adhesive
  • One Cloth
  • One Fertilizer
  • One Nuclear Material

Weather Change Shell - Rain

  • One Adhesive
  • One Cloth
  • One Fertilizer
  • One Silver

How to Use Weather Change Shells in Fallout 4

Now that you've made the shells, it's time to fire them into the sky. Walk up to the mortar and press the Square/X button to transfer items. The shells will be in the My Misc tab of your inventory. Insert the shells into the firework mortar and enjoy your weather of choice.