If you have been spending time in Speranza since the Shrouded Sky update, you have probably noticed a new assignment from Shani sitting in your project tab. The Arc Raiders Weather Monitor System is a five-stage player project added in Patch 1.17.0, and completing it rewards you with 250 Raider Tokens plus the exclusive Anemometer Backpack Charm. Neither reward requires any special skill — just the right materials, submitted in the right order.
This guide covers every stage of the Weather Monitor System project in Arc Raiders: what to hand in, where to find each material, what you get in return, and the fastest strategies for powering through all five stages without wasting supplies.
What Is the Arc Raiders Weather Monitor System Project?
The Weather Monitor System is a seasonal player project introduced with the Shrouded Sky update on February 24, 2026. Shani assigns it as part of an effort to build a topside weather-tracking network for Speranza — a practical in-lore response to the Hurricane map condition that arrived with the same update.
Structurally, the project works exactly like the Trophy Display: you donate specific items across five sequential stages, each stage unlocks only after the previous one is complete, and everything you submit is consumed permanently. There is no time limit or expiration date on the project, and your progress persists between Expedition resets, so you can chip away at it at whatever pace suits your playstyle.
A few key rules to keep in mind before you start donating:
- Items are gone the moment you submit them. Do not donate your last medkit, then queue into a Hurricane raid and immediately regret it.
- You cannot skip stages. Stage 2 materials cannot be submitted until Stage 1 is completed.
- Stockpiling ahead is encouraged. You can start farming Stage 2, 3, 4, and 5 materials right now, even if you have not reached those stages yet.
Arc Raiders Weather Monitor System: All Stage Requirements and Rewards
Here is a complete breakdown of every stage, every required material, and every reward.
Stage 1: Atmospheric Pressure
Stage 1 is the most accessible entry point in the entire project. Plastic Parts and Metal Parts are ubiquitous across virtually every loot zone in the game, and Scrappy will pick them up automatically during raids if you have him equipped. ARC Alloys drop from any destroyed ARC unit, and Oil spawns regularly in Industrial and Mechanical loot zones.
Required Materials:
- Plastic Parts x25
- Metal Parts x15
- ARC Alloy x5
- Oil x3
Stage 1 Rewards:
- Durable Cloth x5
- Great Mullein x5
- Antiseptic x5
- Vita Shot x3
The Vita Shots and Antiseptic alone are worth the submission. If you have been raiding with any consistency, you likely already have most of these materials sitting in your stash.
Stage 2: Sunlight
Stage 2 introduces the first ARC-specific drops. The Snitch Scanner comes exclusively from destroyed Snitches — there is no alternative source, so run a dedicated Snitch patrol route and extract once you have one. The Comet Igniter is a brand-new item added in the Shrouded Sky update: it only drops from the Comet ARC enemy, a fast-moving aerial unit that self-destructs after a short timer. Kill it and loot it before it goes up. Wires and Sensors drop from Electrical and Technological loot zones respectively, and Celeste sometimes stocks both — check her inventory before you queue.
Required Materials:
- Snitch Scanner x1
- Wires x3
- Sensors x3
- Comet Igniter x1
Stage 2 Rewards:
- Processor x10
- Advanced Electrical Components x5
- Zipline x3
- Raider Hatch Key x1
The Raider Hatch Key reward here is especially useful if you are carrying high-value loot after farming Comet Igniters. Silent extractions are significantly safer than Cargo Elevators when you are loaded up — our Arc Raiders Raider Hatch Key guide covers every hatch location across the current map pool so you can plan your exit before heading topside.
Stage 3: Precipitation
This is where the project starts requiring more deliberate farming. ARC Powercells drop from tougher ARC unit types — Rocketeers, Bastions, and Bombardiers are your primary targets — so expect proper fights rather than casual looting. Canisters and Steel Springs turn up in Industrial zones, and the Fine Wristwatch is a rare Residential loot item that requires a bit of patience to find. In exchange, Stage 3 hands you a Level 3 Renegade, which is either a solid mid-game weapon or a decent sell at market.
Required Materials:
- ARC Powercell x5
- Canister x5
- Steel Spring x5
- Fine Wristwatch x1
Stage 3 Rewards:
- Medium Gun Parts x3
- Complex Gun Parts x2
- Advanced Mechanical Components x3
- Renegade (Level 3) x1
If you are farming Rocketeers and Bastions for ARC Powercells and want to maximise efficiency, heavier ARC enemies also populate Stella Montis. Consider chaining an ARC-hunting loop alongside your Weather Monitor System farming — killing a Shredder along the way is worth noting, since they drop ARC Alloys useful for Stage 1 restocking. Our full guide on how to kill a Shredder in Arc Raiders covers the exact weaknesses and engagement strategy to make those fights quick and consistent.
Stage 4: Humidity
Stage 4 mixes common loot items with another new ARC-specific drop. Duct Tape and Rusted Bolts are standard loot items found across Industrial and Mechanical zones. The Water Pump is the rarest item in this stage — the Hydrophonic Dome Complex in Dam Battlegrounds is one of the more reliable spawn locations. Wasp Drivers come exclusively from destroyed Wasps, so target Wasp patrols until you have three.
Required Materials:
- Duct Tape x10
- Rusted Bolts x3
- Water Pump x1
- Wasp Driver x3
Stage 4 Rewards:
- Explosive Compound x10
- Showstopper x3
- Trailblazer x3
- Extended Barrel x1
The Explosive Compound payout from this stage is genuinely valuable if you craft grenades regularly. Ten units in a single reward is a meaningful boost to your crafting stockpile.
Stage 5: Temperature
The final stage has the steepest requirements, and the Firefly Burner is the reason why. The Firefly is a new armored flying ARC unit added in the Shrouded Sky update — it carries a flamethrower, moves aggressively, and hits very hard. Killing one and looting the Burner before the debris cools is the only way to obtain this item. Camera Lenses and Voltage Converters appear as random loot items across various zones, and Damaged Heat Sinks can be found on ARC wreckage scattered around all current maps.
Required Materials:
- Camera Lens x3
- Damaged Heat Sink x1
- Firefly Burner x1
- Voltage Converter x3
Stage 5 Rewards:
- Medium Shield x1
- Surge Shield Recharger x5
- Sterilized Bandage x3
- Tactical MK3 (Revival) x1
The Tactical MK3 (Revival) augment is a strong pickup. Whether you equip it immediately or sell it, it justifies the effort required for the Firefly hunt on its own.
Weather Monitor System Completion Rewards
Finishing all five stages of the Arc Raiders Weather Monitor System project earns you two bonus rewards on top of the individual stage payouts:
- Anemometer Backpack Charm — A cosmetic charm exclusive to this project. No other way to obtain it.
- 250 Raider Tokens — The real prize. 250 Raider Tokens is a substantial chunk of premium currency earned entirely through regular raids.
The 250 Raider Tokens alone make the Weather Monitor System one of the best long-term return investments in the current season. Since most of the required materials appear during normal farming routes anyway, completing the project carries almost no additional opportunity cost for players who raid regularly.
How to Farm Weather Monitor System Materials Efficiently
Start Stockpiling Before You Reach Each Stage
Nothing in the project rules prevents you from farming Stage 4 materials while you are still on Stage 1. Your stash does not know the difference. Get in the habit of picking up Duct Tape, Water Pumps, and Camera Lenses whenever you encounter them, even during raids you queued for a completely different purpose.
Prioritize the New ARC Drops Early
The Comet Igniter (Stage 2) and Firefly Burner (Stage 5) are the two materials that will create genuine bottlenecks. Both require killing new ARC enemy types that only entered the game with the Shrouded Sky update. The Comet and the Firefly appear more frequently during the Hurricane map condition, so time your farming sessions around active Hurricane rotations for maximum efficiency.
Check Celeste Before Every Queue
Celeste stocks Wires and Sensors — both needed in Stage 2 — on a rotating daily basis. Buying them from her directly eliminates multiple raids of hunting. Make checking her inventory a pre-queue habit, especially when you are close to a stage completion.
Use Hurricane Conditions Strategically
The Hurricane map condition, introduced alongside the Shrouded Sky update, significantly increases ARC activity and spawns the Comet and Firefly enemies. Raiding during Hurricane conditions is higher risk but also much more efficient for Weather Monitor System farming. If you are comfortable with the elevated threat level, these windows are your fastest path to the ARC-specific materials.
Do Not Donate Items You Cannot Afford to Lose
This sounds obvious, but it catches players regularly. If your stash only has three Oil flasks and you need them for upcoming raids, do not donate all three to Stage 1 on a whim. The project is permanent — it will wait. Your next raid cannot afford to wait if you have no consumables.
Weather Monitor System and the High Gain Antenna Project
The Weather Monitor System is not the only multi-stage project active in Arc Raiders. If you are already deep into raiding and farming ARC components, the High Gain Antenna Project runs parallel to it and rewards ARC Synthetic Resin alongside weapon parts and crafting materials. Since both projects share some loot zones and ARC enemy targets, running them in parallel is the most time-efficient approach. Our Arc Raiders High Gain Antenna Project guide breaks down all of its stage requirements and reward tracks.
For players newer to the game who are still learning how to navigate topside efficiently, our Arc Raiders extraction guideis also worth reviewing — knowing when to use a Cargo Elevator versus a Raider Hatch versus a Metro Station can significantly affect how much of your farmed loot actually makes it back to Speranza.
Frequently Asked Questions
Does the Arc Raiders Weather Monitor System have an expiration date?
No. The Weather Monitor System does not have a time limit or expiration date. It was added as part of the Shrouded Sky seasonal window, which ran from February 24 to March 31, 2026, but the project itself is permanent. Your progress carries over between Expedition resets indefinitely.
What are the final rewards for completing the Weather Monitor System in Arc Raiders?
Completing all five stages rewards you with 250 Raider Tokens and the Anemometer Backpack Charm. Both rewards are delivered on full project completion in addition to the individual stage rewards along the way.
Where do you find the Comet Igniter for Stage 2 of the Weather Monitor System?
The Comet Igniter only drops from the Comet ARC enemy introduced in the Shrouded Sky update. The Comet is an aerial ARC unit that self-destructs after a short timer, so you need to kill and loot it before the timer expires. Comet spawns are most common during the Hurricane map condition.
Where do you find the Firefly Burner for Stage 5 of the Weather Monitor System?
The Firefly Burner drops exclusively from the Firefly, a new armored flamethrower ARC unit added in the Shrouded Sky update. Fireflies are tough, fast-moving enemies that appear more frequently during Hurricane conditions. Kill one and loot the Burner before the debris despawns.
Can you complete multiple stages of the Weather Monitor System in one session?
Yes, provided you have all the required materials in your stash. Completing a stage unlocks the next one immediately, and you can donate to the newly unlocked stage in the same session without queuing into a raid. If you have been stockpiling ahead, it is entirely possible to complete several consecutive stages in a single sitting.
Does the Water Pump only spawn at the Hydrophonic Dome Complex?
No, the Water Pump can spawn in multiple locations, but the Hydrophonic Dome Complex in Dam Battlegrounds is one of the most reliable spots. It also appears as a general loot item in Mechanical and Industrial zones across other maps, though with lower frequency.
Conclusion
The Arc Raiders Weather Monitor System project is one of the most rewarding long-term objectives available in the Shrouded Sky update. Across five stages — Atmospheric Pressure, Sunlight, Precipitation, Humidity, and Temperature — you donate materials gathered during normal raids and earn a steady stream of valuable crafting components, weapons, and augments along the way. The 250 Raider Tokens and Anemometer Backpack Charm waiting at Stage 5 are well worth the effort, especially given that most of the required materials pass through your stash naturally during regular play.
Start stockpiling early, plan your farming around Hurricane conditions for the new ARC drops, and keep the donation rules in mind before submitting anything you cannot replace before your next run. Good luck, Raider.
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