Reviewed August 2026 against USDA’s Economic Research Service, DTN’s fertilizer price survey, and Recycling Today’s reporting on CME/LME copper markets.

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LME Copper May 27, 2025 Official Price & August 2025 Futures: What the Settlement Really Was, and How to Check It Yourself

The London Metal Exchange publishes its Official Price for copper — the cash settlement, the three-month price, and the monthly “prompt date” futures such as the August 2025 contract — free of charge on lme.com the next business day, and that same data is mirrored by market-data vendors within hours. If you’re trying to confirm what copper closed at on May 27, 2025, or what the August 2025 futures print looked like that day, the fastest and most accurate route is the exchange’s own record, not a secondhand number repeated across the web. Below is exactly how to pull it, plus the real market story from that period — a tariff-driven Comex-LME price gap — that most write-ups skip, and what it means for US farm, forestry, and infrastructure budgets.

Table of Contents

• How to Find LME’s Actual Official Price and August Futures Print
• Why Copper Was Making Headlines Around May 2025: The Comex-LME Gap
• Where the Copper Actually Went
• Calculator: What a Price Swing Costs Your Project
• Agriculture, Forestry, and Infrastructure: Where Copper Cost Shows Up
• Fertilizer Futures Prices: What US Growers Are Actually Paying
• Farmonaut: Satellite-Based Mineral Intelligence
• Watch: Copper, Minerals, and Exploration Technology
• FAQs
• Try it: Run your own numbers

How to Find LME’s Actual Official Price and August Futures Print

The LME does not run one generic “copper price.” It runs several parallel series, and the settlement people search for — “May 27, 2025,” “August 2025 futures” — sits inside a specific one of them. Knowing which series you need is the difference between a two-minute lookup and an afternoon of confusion.

For a specific historical date such as May 27, 2025, the exchange’s own daily archive on lme.com is authoritative and free for the current data window; going further back, or pulling a full historical series for the August prompt contract, typically requires either an LME data license or a vendor terminal (Barchart, Westmetall, or a Bloomberg/Refinitiv feed). We were not able to independently re-verify a specific tick for that date through a freely accessible source during this review, and rather than repeat an unverified number, we’d rather tell you plainly: pull it from the source above, or from a vendor’s paid historical-prices export, and cross-check the two if the number matters for a contract or filing. That habit — checking the primary series rather than a cached figure — is the one piece of this page that won’t go stale.

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Why Copper Was Making Headlines Around May 2025: The Comex-LME Gap

The reason copper was suddenly a headline commodity in the spring of 2025 wasn’t the daily settlement alone — it was a structural gap opening up between the two big copper markets. At the end of 2024, Comex copper futures traded about 6 cents per pound above LME spot, a routine spread. Once President Trump ordered a Section 232 investigation into copper imports in February 2025, traders began pulling metal toward US warehouses ahead of a possible tariff, and by late July 2025 that spread had widened to more than $1.00 per pound — described by Recycling Today, citing exchange data, as one of the widest price differentials in trading-exchange history. Converted to LME’s own pricing unit, that’s roughly $132 per metric ton at the routine end-of-2024 level versus over $2,200 per metric ton at the late-July 2025 peak (6¢/lb × 2,204.62 lb/tonne ≈ $132/tonne; $1.00/lb × 2,204.62 lb/tonne ≈ $2,205/tonne). By mid-August 2025, after the White House’s tariff decision exempted refined copper cathode from the inbound duty, the spread collapsed back to roughly that same 6-cent baseline.

That gap also shows up in trading volume: LME copper turnover for January-July 2025 topped 635,000 metric tons, versus roughly 621,300 metric tons over the same months in 2024, and July 2025 alone saw 167,501 lots traded, a 5.2% year-over-year increase, per Recycling Today’s reporting on exchange data. For anyone budgeting a copper-intensive project, the takeaway isn’t the exact spot number on one date — it’s that the gap between exchanges, not just the level of either one, is what moved fastest and mattered most in 2025.

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Where the Copper Actually Went

The tariff-hedging trade wasn’t abstract — it physically moved metal. Comex warehouse copper stocks rose by nearly 158,000 metric tons over the course of 2025, and US imports of refined copper cathode reached 940,000 metric tons in the first half of 2025 alone, compared with 540,000 metric tons for all of 2024 combined, according to Recycling Today’s account of the trade data. That’s a 74% jump in six months versus the prior full year’s pace.

Calculator: What a Price Swing Costs Your Project

Rather than lean on one snapshot price, use the tool below to stress-test your own copper line item against the kind of spread swing that actually played out in 2025 — anywhere from a routine 6 cents per pound to the more-than-$1.00-per-pound peak.

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Agriculture, Forestry, and Infrastructure: Where Copper Cost Shows Up

Copper is a genuine critical mineral for the U.S. Geological Survey, and its domestic mine value keeps climbing: per USGS's Mineral Commodity Summaries 2026, released February 10, 2026, Arizona overtook Texas for second place among mineral-producing states on the strength of copper, molybdenum, gold, and silver output, behind Nevada in first place, and that push helped drive a $6.8 billion increase in western-state mine production value; across all commodities, US mineral-reliant industries were valued at $4.09 trillion in 2025. None of that is agriculture-specific, but it explains supply-side pressure on the copper wiring, motors, and transformers that show up in:

• Electrified irrigation and pumps: motor windings and cable runs are copper-intensive line items in any pivot or drip-system upgrade.
• Processing and cold-storage lines: conveyor motors, sorting electronics, and refrigeration compressors all carry copper content that scales with facility size.
• Rural grid and broadband builds: copper wiring and grounding remain standard even where fiber handles the data layer, and microgrid projects add transformer copper on top.

The honest way to size that exposure for your own operation is the calculator above, fed with your supplier's bill-of-materials copper weight and your own price assumption — not a blanket industry percentage, because copper content varies enormously between a drip-irrigation retrofit and a full substation build.

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Fertilizer Futures Prices: What US Growers Are Actually Paying

Fertilizer costs move on their own cycle, separate from copper, but they hit the same farm budget line and the same planting-season planning window. DTN's fertilizer price survey for May 11-15, 2026 put dry fertilizers at: DAP $913 per ton, MAP $947 per ton, potash $493 per ton, and urea $864 per ton; liquids came in at 10-34-0 $722 per ton, anhydrous ammonia $1,126 per ton, UAN28 $531 per ton, and UAN32 $597 per ton. On a nitrogen-cost basis, that works out to $0.94 per pound of nitrogen for urea, $0.69 per pound of nitrogen for anhydrous, $0.95 per pound of nitrogen for UAN28, and $0.93 per pound of nitrogen for UAN32.

Year over year against the May 12-16, 2025 survey week, DTN reported potash up 5%, 10-34-0 up 8%, DAP and MAP up 15%, UAN32 up 23%, UAN28 up 29%, urea up 37%, and anhydrous up 45%. Working those percentages backward against the May 2026 prices gives an implied year-earlier level: potash near $470/ton, DAP near $794/ton, urea near $631/ton, and anhydrous near $777/ton.

For longer historical context, USDA's Economic Research Service noted in its March 27, 2025 chart of note that anhydrous ammonia peaked above $1,600 per ton and urea surpassed $1,000 per ton in 2022, with nitrogen prices having stabilized by early 2025 while staying elevated above pre-2021 levels — the same pattern the 2026 DTN survey shows continuing, with anhydrous back above $1,100 per ton. CME Group also runs cash-settled fertilizer futures and options — covering urea and UAN contracts among others — settled against daily price assessments from industry reporting agencies; check CME's own settlement pages for the current print on any given contract month, the same "go to the source" habit that applies to LME copper above.

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Farmonaut: Satellite-Based Mineral Intelligence

Price volatility on both copper and fertilizer inputs is exactly why supply-side visibility matters before capital gets committed. We at Farmonaut use Earth observation, remote sensing, and AI to change how copper and other minerals get found in early-stage exploration, before a project ever reaches a price-exposed construction budget.

• 📡 Global scale: over 80,000 hectares mapped across 18+ countries, covering precious, base, and critical energy minerals.
• 🌐 Time and cost efficiency: early-stage exploration time and cost cut by up to 85%, with no ground disturbance required to screen a target.
• 🛰️ Data-driven intelligence: our satellite based mineral detection and satellite driven 3D mineral prospectivity mapping turn orbital data into georeferenced, actionable targets.
• 📑 Actionable outputs: mineral intelligence reports and 3D models, including TargetMax™ Drilling Intelligence, to make the next drilling dollar count.

Ready to map your mining site? Map Your Mining Site Here, or request a tailored prospect report via Get Quote or Contact Us.

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Key Takeaways

• ✔ LME's cash, 3-month, and monthly (third-Wednesday) prompt prices — including August contracts — are free on lme.com the next business day; treat that as your primary source over any cached figure.
• 📊 The real 2025 copper story wasn't one price point — it was the Comex-LME spread widening from about 6 cents per pound at the end of 2024 to more than $1.00 per pound in late July 2025, then collapsing back after the tariff decision on refined cathode.
• 🚜 Fertilizer costs are on their own cycle: DTN's May 11-15, 2026 survey shows nitrogen products (urea, anhydrous, UAN) up far more year over year than phosphate or potash.
• 🛰️ Supply-side visibility — including satellite-based mineral detection — helps buffer both categories of input-cost risk before capital is committed.

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