The ARC Raiders Weather Monitor System Project was a five-stage Seasonal Player Project introduced with Shrouded Sky. It asked Raiders to build a weather-monitoring station for Speranza by submitting common resources, ARC drops, electronics and several harder-to-find items.
There is one current detail every guide should make clear first: the Weather Monitor System is no longer active. Embark originally described it as a Seasonal Player Project, and later confirmed that players who had contributed but could not complete it in time would receive compensation through their in-game inbox. Current project records place its run from February 24 to March 31, 2026.
That makes this guide useful for checking the original requirements, understanding the fastest route if the Project returns, and avoiding outdated material lists still circulating from launch week.
All Weather Monitor System Materials
The Project progressed through five sequential stages. You could collect later materials early and keep them in your Stash, which made advance planning much faster than waiting for each stage to appear.
| Stage | Required Materials | Main Bottleneck |
| Atmospheric Pressure | 25 Plastic Parts, 15 Metal Parts, 5 ARC Alloy, 3 Oil | None if your basic-material reserve is healthy |
| Sunlight | 1 Snitch Scanner, 3 Wires, 3 Sensors, 1 Comet Igniter | Comet Igniter |
| Precipitation | 5 ARC Powercell, 5 Canister, 5 Steel Spring, 1 Fine Wristwatch | Fine Wristwatch |
| Humidity | 10 Duct Tape, 3 Rusted Bolts, 1 Water Pump, 3 Wasp Driver | Water Pump |
| Temperature | 3 Camera Lens, 1 Damaged Heat Sink, 1 Firefly Burner, 3 Voltage Converter | Firefly Burner |
These quantities are worth checking carefully because some older launch-day guides still show conflicting numbers for Wires, Sensors, Canisters or Steel Springs. The current archived Project data and MitchCactus service listing agree on 3 Wires, 3 Sensors, 5 Canisters and 5 Steel Springs.
The Fast Route Starts With Rare Items, Not Stage 1
If this Project returns, do not farm it strictly from Stage 1 to Stage 5.
The common materials are usually the easy part. The better approach is to protect the items that are random, enemy-specific or tied to narrower loot categories before filling the basic requirements.
Prioritize these first:
- Comet Igniter: comes from the Comet ARC introduced with Shrouded Sky.
- Fine Wristwatch: a rare valuable found primarily through Commercial and Residential loot.
- Water Pump: associated with Mechanical and Industrial loot areas.
- Firefly Burner: requires a Firefly kill and successful extraction with the part.
- Camera Lens: commonly associated with Security loot.
- Snitch Scanner and Wasp Drivers: save these when the matching ARC appears rather than farming them only after their stage unlocks.
The original stage material sourcing breakdown also shows why this approach works: later stages mix targeted ARC parts with location-specific loot, while the opening stage mostly asks for everyday resources.
Before selling or recycling one of these items, it is worth checking your wider progression through the ARC Raiders Materials Priority List. Project materials can look disposable until they suddenly become the one item holding up an entire stage.
Build Farming Runs Around Loot Categories
A faster completion route combines several requirements in the same raid instead of chasing one item at a time.
For Mechanical and Industrial areas, look for Oil, Steel Springs, Rusted Bolts and Water Pumps.
For Electrical and Technological areas, prioritize Wires, Sensors, Damaged Heat Sinks and Voltage Converters.
For Commercial and Residential areas, keep an eye out for Plastic Parts, Duct Tape and especially the Fine Wristwatch.
ARC encounters should cover the remaining enemy drops. Destroy ordinary ARC for ARC Alloy and Powercells, target Snitches for the Scanner, Wasps for Drivers, Comets for the Igniter and Fireflies for the Burner.
That overlap is more efficient than treating every requirement as a separate expedition. The ARC Raiders resource farming guide is useful when you want to combine Project materials with normal Workshop and gear progression instead of running a route that only serves one hand-in.
Do Not Recycle a Future Stage by Accident
One of the easiest ways to slow a multi-stage Project is turning tomorrow’s requirement into today’s crafting materials.
Steel Springs, Sensors, Duct Tape and Voltage Converters can overlap with the broader recycling and crafting economy. The safe rule is simple: once you know a later Project stage needs an item, reserve the exact quantity before cleaning your Stash.
The ARC Raiders recycling guide is the better reference when the question is whether an item should be broken down rather than submitted.
That matters even more for rare single-item blockers such as the Fine Wristwatch or Water Pump. One accidental sale can cost more time than collecting all of Stage 1.
What Rewards Did the Project Give?
Each completed stage paid out useful gear or crafting resources, while full completion awarded the unique cosmetic and permanent currency reward.
The reward path included:
Stage 1: Durable Cloth, Great Mullein, Antiseptic and Vita Shots.
Stage 2: Processors, Advanced Electrical Components, Ziplines and a Raider Hatch Key.
Stage 3: Medium Gun Parts, Complex Gun Parts, Advanced Mechanical Components and a Renegade III.
Stage 4: Explosive Compound, Showstoppers, Trailblazers and an Extended Barrel.
Stage 5: Medium Shield, Surge Shield Rechargers, Sterilized Bandages and a Tactical Mk. 3 Revival Augment.
Completing all five stages awarded the Anemometer backpack charm and 250 Raider Tokens.
The official Shrouded Sky announcement confirms that the Project was created around Speranza’s need to better predict dangerous weather after the Hurricane arrived Topside.
Can You Complete the Weather Monitor System Now?
At the moment, no active Weather Monitor System Project is listed in the live Project rotation. It is recorded among previous Projects rather than the current Expedition, Ascending the Mountain and Trophy Display activities.
That current status is important because the MitchCactus Explore Weather Monitor System Project page still lists individual materials and full completion options. Since the in-game Project itself is presently retired, confirm that the Project is actually available on your account or check current service availability before ordering completion.
If the Project returns and only individual requirements are blocking you, the broader ARC Raiders Materials selection also contains several relevant components such as Comet Igniters, Firefly Burners, Duct Tape, Canisters and Damaged Heat Sinks.
Mistakes to Avoid If the Project Returns
Do not follow an old guide that calls the Project permanent. Embark’s own Shrouded Sky patch notes labelled it Seasonal, and it later expired.
Do not wait until Stage 5 to start saving the Firefly Burner or Camera Lenses.
Do not sell a Fine Wristwatch just because its Coin value looks attractive.
Do not farm common Plastic and Metal Parts for hours while ignoring the rarer enemy-specific drops.
And do not assume every old material table is accurate. Several early guides were published before the final quantities were consistently documented.
Conclusion
The fastest way through the ARC Raiders Weather Monitor System Project was to plan all five stages from the beginning rather than complete them blindly in order.
Common materials such as Plastic Parts, Metal Parts and Duct Tape were rarely the true problem. The real time savers were keeping the Comet Igniter, Fine Wristwatch, Water Pump, Firefly Burner and other later-stage requirements as soon as they appeared.
The Project is currently retired, so players cannot simply start it today. But if Embark rotates it back in, the best strategy remains the same: reserve the rare blockers first, combine compatible loot categories into the same raids, and only then fill the easy material totals.
Frequently Asked Questions
Is the Weather Monitor System Project still available in ARC Raiders?
No. The Weather Monitor System is currently listed as a previous Project. Embark also acknowledged players who had contributed but could not finish it before it ended.
How many stages did the Weather Monitor System have?
It had five stages: Atmospheric Pressure, Sunlight, Precipitation, Humidity and Temperature.
What were the hardest Weather Monitor System materials to find?
The most targeted requirements included the Comet Igniter, Fine Wristwatch, Water Pump and Firefly Burner because they depended on specific enemies or narrower loot sources.
What did you get for completing the Weather Monitor System?
Full completion awarded the Anemometer backpack charm and 250 Raider Tokens, in addition to the stage rewards.
Will the Weather Monitor System return?
Embark has not announced a confirmed return date. Because it was a Seasonal Player Project, any future return should be verified through the live Project menu or an official update rather than assumed.
