EcoBolt 2025 vineyard climate comparison
Observed period: 1 April 2025 to the harvest date of each lot. All statistics below are outputs of the vineyard-season-climate skill applied to published half-hourly XEMA observations.
| Site / lot | Harvest | Whole-period rain (mm) | Final 30 d rain (mm) | Mean / min / max temperature (C) | Mean RH / night RH (%) | Solar (MJ/m2) | High-solar days | GDD10 |
|---|---|---|---|---|---|---|---|---|
| Verdú - Trepat T1 | 18 Sep | 167.7 | 21.0 | 21.6 / 3.9 / 39.3 | 60.8 / 74.4 | 4075.4 | 96 | 1980.9 |
| Verdú - Garnatxa | 18 Sep | 167.7 | 21.0 | 21.6 / 3.9 / 39.3 | 60.8 / 74.4 | 4075.4 | 96 | 1980.9 |
| Verdú - Trepat T2 | 26 Sep | 168.5 | 5.4 | 21.4 / 3.9 / 39.3 | 60.9 / 74.3 | 4225.3 | 103 | 2041.0 |
| Verdú - Ancestral | 26 Sep | 168.5 | 5.4 | 21.4 / 3.9 / 39.3 | 60.9 / 74.3 | 4225.3 | 103 | 2041.0 |
| Vilobí del Penedès - Merlot | 21 Sep | 197.0 | 39.9 | 21.2 / 4.8 / 38.0 | 69.9 / 84.5 | 3978.3 | 95 | 1948.9 |
Seasonal structure
Verdú accumulated 167.7 mm before the 18 September harvest and 168.5 mm by 26 September. The largest daily event was 23.8 mm on 12 July. The station recorded a 30-day dry spell, 82 heat days at or above 30 C before 18 September, and 34 days at or above 35 C. Extending the season to 26 September added only 0.8 mm rain and increased GDD10 from 1980.9 to 2041.0 C-days. The 30 days before the later harvest were especially dry: 5.4 mm, with a 29-day dry spell.
Vilobí accumulated 197.0 mm by 21 September. Rainfall was concentrated in a 75.4 mm event on 12 July; the seasonal dry spell nevertheless reached 52 days. The 30 days before harvest received 39.9 mm, including 22.6 mm on 9 September. Vilobí was more humid than Verdú, particularly at night (84.5% versus about 74.4%), and had fewer heat extremes: 54 days at or above 30 C and 8 days at or above 35 C.
Monthly rainfall
| Site / endpoint | Apr | May | Jun | Jul | Aug | Sep to harvest |
|---|---|---|---|---|---|---|
| Verdú, 18 Sep | 52.5 | 34.2 | 12.1 | 44.1 | 24.0 | 0.8 |
| Verdú, 26 Sep | 52.5 | 34.2 | 12.1 | 44.1 | 24.0 | 1.6 |
| Vilobí, 21 Sep | 14.2 | 37.1 | 0.4 | 103.9 | 3.6 | 37.8 |
Monthly day/night climate
| Site | Month | Day/night temperature (C) | Day/night RH (%) | RH >=95% (h) | Heat days >=35 C | VPD (kPa) | High-solar days |
|---|---|---|---|---|---|---|---|
| Verdú | Apr | 15.9 / 10.2 | 66.5 / 88.6 | 172 | 0 | 0.44 | 13 |
| Verdú | May | 19.8 / 12.9 | 57.0 / 81.5 | 140 | 1 | 0.86 | 18 |
| Verdú | Jun | 29.2 / 21.4 | 39.3 / 61.2 | 9 | 14 | 2.09 | 19 |
| Verdú | Jul | 26.8 / 21.0 | 50.6 / 72.9 | 42 | 6 | 1.49 | 21 |
| Verdú | Aug | 28.7 / 22.3 | 43.5 / 62.9 | 19 | 13 | 1.87 | 17 |
| Verdú, to 18 Sep | Sep | 25.2 / 19.4 | 52.4 / 79.0 | 39 | 0 | 1.11 | 8 |
| Verdú, to 26 Sep | Sep | 23.7 / 17.9 | 52.6 / 76.9 | 49 | 0 | 1.02 | 15 |
| Vilobí | Apr | 16.7 / 10.9 | 64.1 / 86.0 | 68 | 0 | 0.49 | 13 |
| Vilobí | May | 19.9 / 13.6 | 60.4 / 86.6 | 86 | 0 | 0.71 | 19 |
| Vilobí | Jun | 27.7 / 19.9 | 49.8 / 79.1 | 10 | 4 | 1.47 | 19 |
| Vilobí | Jul | 26.2 / 21.1 | 62.4 / 84.9 | 42 | 2 | 1.02 | 16 |
| Vilobí | Aug | 27.6 / 21.2 | 56.6 / 81.6 | 17 | 2 | 1.19 | 18 |
| Vilobí, to 21 Sep | Sep | 24.4 / 19.4 | 67.1 / 89.5 | 90 | 0 | 0.68 | 10 |
High-solar days are days with measured global irradiation at least 65% of daily extraterrestrial irradiation. This is a reproducible high-solar/clear-sky classification, not a measurement of sunshine-duration hours.
Interpretation
The station observations indicate a warmer, more heat-exposed Verdú season and a more humid Vilobí season with substantially greater rainfall immediately before harvest. These are climatic exposures, not measurements of berry composition or wine quality. The skill correctly leaves sugar/Brix unavailable: a numerical estimate requires repeated field Brix measurements and a validated field-specific model that also represents yield, canopy, soil and water status.
Coverage is 99.9% of expected hourly slots in every harvest-bounded analysis. Verdú uses Tàrrega XEMA (C7, approximately 6.2 km from the municipality point); Vilobí uses Vilafranca del Penedès - la Granada XEMA (W4, approximately 3.4 km). Coordinates are municipality-level rather than parcel-level, so local topographic and vineyard microclimate differences remain unresolved.