Barcelona's New Year's Eve 10K through Poblenou and along the seafront to the Fòrum. Dusk on December 31 is cool and usually dry, with the occasional sea breeze.
Plan for about 55°F (13°C) at the 17:00 start, feeling like 51°F (11°C), with 73% humidity and 6 mph wind, warming to roughly 55°F (13°C) by the finish. It rained on 0 of the last 10 race days. Wear: Short Sleeve Tech Shirt, Capris or Light Tights, Running Shoes.
Feels like 51°F (11°C) at the start · finish 55°F (13°C) · rain 0 of 10 · start air from 51°F (11°C) to 61°F (16°C)
Conditions at the 17:00 start on the race's usual date each year (december 31 (New Year's Eve)). Years when the race was cancelled or moved still show that date's weather. Source: Open-Meteo ERA5 archive.
Bar: air temperature from start to finish · dot: feels-like effective temperature · ≫ windy (15+ mph) · rain · shaded: PR band 40–50°F
| Year | Start temp | Feels like | Finish | Humidity | Wind | Rain | Sky |
|---|---|---|---|---|---|---|---|
| 2025 | 51°F (11°C) | 48°F | 51°F | 74% | 5 mph | – | Mostly clear |
| 2024 | 52°F (11°C) | 51°F | 52°F | 91% | 3 mph | – | Mostly clear |
| 2023 | 59°F (15°C) | 53°F | 59°F | 52% | 7 mph | – | Overcast |
| 2022 | 61°F (16°C) | 58°F | 61°F | 71% | 8 mph | – | Clear |
| 2021 | 55°F (13°C) | 55°F | 55°F | 95% | 3 mph | – | Clear |
| 2020 | 51°F (11°C) | 44°F | 51°F | 64% | 9 mph | – | Mostly clear |
| 2019 | 53°F (12°C) | 49°F | 53°F | 75% | 8 mph | – | Clear |
| 2018 | 55°F (13°C) | 53°F | 55°F | 70% | 3 mph | – | Clear |
| 2017 | 58°F (14°C) | 53°F | 58°F | 57% | 9 mph | – | Mostly clear |
| 2016 | 54°F (12°C) | 50°F | 54°F | 77% | 6 mph | – | Clear |
Coldest start: 51°F (11°C) in 2025. Warmest: 61°F (16°C) in 2022. Wettest: no measurable rain in any year.
The time estimates apply published temperature–performance curves to this race's ten-year weather history. Performance peaks at an effective race temperature of roughly 40 to 50°F and degrades faster the warmer it gets and the slower you run (Ely et al., 2007; El Helou et al., 2012). Wind adds a cost that grows with the square of the wind speed (Pugh, 1971), split into head and tail components on point-to-point courses. Shorter races are penalised less. This is a model, not a prediction; your training and the course matter more.
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Built from the 10-year average start conditions by the same engine as the live tool. Treat optional items as corral-only layers you can shed.
Short Sleeve Tech Shirt
Breathable running tee
Capris or Light Tights
3/4 length for moderate warmth
Running Shoes
Your regular training shoes
✓ Worn by the author
Compression tight for 40 to 55°F, works under shorts
$78
✓ Worn by the author
Fast-drying micromesh tee for warm-weather miles
$75
Packable wind shell for cool morning miles
$115
✓ Worn by the author
Thin, ribbed quarter sock that keeps grit out
$36
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Over 2016 to 2025 the start averaged 55°F (13°C) (feels like 51°F (11°C)) with 73% humidity and 6 mph wind, warming to about 55°F (13°C) by the finish. It rained measurably on 0 of those 10 race days. The coldest start was 51°F (11°C) in 2025; the warmest was 61°F (16°C) in 2022.
For a typical 55°F (13°C) start: Short Sleeve Tech Shirt, Capris or Light Tights, Running Shoes. Dress for about 15°F warmer than the start temperature, since the race itself adds that much, and plan to shed anything you only need in the corral.
The B100 Cursa dels Nassos is usually held on december 31 (New Year's Eve). The next expected date is Thursday, December 31, 2026. Confirm on the official site, since dates occasionally move.
The live forecast on this page comes from Open-Meteo and unlocks 16 days before the race. Forecasts inside 7 days are reliable for temperature within a few degrees; rain timing firms up in the last 2 to 3 days. Until then, the 10-year history above is the best planning guide.
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