Daily guide · ES · 2026-08-17
The week in temperature at Spain's settlement station
All numbers computed from the week's published auction results at publication and frozen — this article is an honest snapshot, not a page that rewrites itself. Reproduce via the API.
Madrid-Barajas ran consistently above seasonal norm this week, with an average anomaly of 2,8 degrees across the eight days. The heat built steadily from the 9th, when tmax reached 37 against a normal of 34,1, peaking on the 13th at 40 degrees, a 6,3-degree anomaly and the week's clear standout. That reading brushed the p99 threshold of 40,6 without crossing it, so no near-record days were logged despite the intensity.
The sharpest feature is the break on the 15th, when tmax fell to 30, some 3,4 degrees below normal and a 10-degree swing from the peak two days earlier. For readers pricing cooling demand, that single-day collapse matters: the week was not a uniform heat plateau but a spike followed by a brief, pronounced dip before partial recovery to 35 on the 16th.
The concrete takeaway is tomorrow's outlook. Our volt-temp-4 model centres on a p50 of 38,4 degrees, with the 38 bucket carrying 45,7 percent probability and the 39 bucket 37,0 percent. Plan around high-30s heat returning, with little chance of touching the 40,6 record threshold.
Daily temperature markets don't settle on "the weather" — they settle on the finalized daily maximum at Madrid-Barajas (LEMD), one specific gauge. Here's what that gauge actually did this week, against the 35-year normal for each calendar day — ground truth for anyone analyzing Madrid temperature markets.
+2.8°C
average anomaly vs the 35-year day normal this week
40°C
week's highest daily max (2026-08-13)
0
days at or above the day-of-year P99
The week, day by day
| Day | Observed Tmax | 35y normal | Anomaly | Day P99 |
|---|---|---|---|---|
| 2026-08-09 | 37° | 34.1° | +2.9° | 40.5° |
| 2026-08-10 | 37° | 34° | +3° | 40.6° |
| 2026-08-11 | 36° | 34° | +2° | 40.6° |
| 2026-08-12 | 38° | 33.8° | +4.2° | 40.6° |
| 2026-08-13 | 40° | 33.7° | +6.3° | 40.6° |
| 2026-08-14 | 39° | 33.5° | +5.5° | 40.6° |
| 2026-08-15 | 30° | 33.4° | -3.4° | 40.6° |
| 2026-08-16 | 35° | 33.4° | +1.6° | 40.6° |
Observed values from METAR (the same ASOS feed settlement pages display); normals and P99 from NOAA ISD, 15-day windowed, leap-stable day mapping.
Tomorrow's distribution
38.4° P50 · volt-temp-4
P10 37.2° · P90 38.8°
The full product behind this page: per-station probability distributions in the exact 1°C buckets markets trade, D+1 to D+5, verified against METAR daily — plus the resolution-station registry (gauges change; Paris did in April 2026) and CME degree-day settle projections. That's the station-temperature capability included in Scale. Analytics only — never wagering advice.
Method & citation. Prices are hourly means of published day-ahead auction results (native 15-minute periods averaged; ENTSO-E/SMARD, attributed). Wholesale-price component only — grid fees and taxes come on top and vary by supplier. Cite as "Voltcast Research, voltcast.com/guides/station-week-es-2026-08-17".
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