San Fermín: what was the weather like at past editions?

Across 33 editions of San Fermín from 1991 to 2025, 16% of festival days had rain (≥ 1 mm), and a day of 30 °C or more came at 26 of 33 editions. Source: ERA5 reanalysis (Copernicus), data to 2025.

Data updated: 2 November 2026 · Sources, licences and data

Calculated 3 November 2026 · weather: ERA5 1991–2025 · edition dates checked 2 November 2026

24 / 33editions with at least one rainy day

16%of festival days rainy

26 / 33editions with a day ≥ 30 °C

9 °C (1993)coldest night

6 mmmedian rain per edition

Climate, not a forecast: these are statistics of past weather, not a forecast for the next edition.

Climate of the usual dates

If the next edition falls on its usual dates (6–14 July), the weather on those calendar days in 1991–2025 gives these odds:

17% — share of rainy days
26 °C — average daily maximum
80% — chance of a day of 30 °C or more
0% — chance of a night below 8 °C

Average daily maximum on these dates: 25.1 °C in 1991–2005, 27.0 °C in 2011–2025.

Weather at past editions

editions with at least one rainy day · Rain, mm

Year	Dates	Rainy days	Rain	Max	Night min
2025	6–14 July	2 / 9	23 mm	33 °C	12 °C
2024	6–14 July	1 / 9	3 mm	34 °C	11 °C
2023	6–14 July	2 / 9	8 mm	37 °C	16 °C
2022	6–14 July	1 / 9	20 mm	36 °C	14 °C
2019	6–14 July	3 / 9	22 mm	32 °C	13 °C
2018	6–14 July	4 / 9	11 mm	32 °C	15 °C
2017	6–14 July	1 / 9	6 mm	33 °C	15 °C
2016	6–14 July	1 / 9	2 mm	33 °C	12 °C
2015	6–14 July	0 / 9	0 mm	37 °C	12 °C
2014	6–14 July	1 / 9	4 mm	27 °C	12 °C
2013	6–14 July	3 / 9	9 mm	32 °C	15 °C
2012	6–14 July	1 / 9	6 mm	32 °C	11 °C
2011	6–14 July	2 / 9	6 mm	33 °C	10 °C
2010	6–14 July	1 / 9	2 mm	35 °C	14 °C
2009	6–14 July	0 / 9	0 mm	33 °C	12 °C
2008	6–14 July	2 / 9	5 mm	32 °C	10 °C
2007	6–14 July	0 / 9	0 mm	32 °C	12 °C
2006	6–14 July	0 / 9	1 mm	35 °C	15 °C
2005	6–14 July	0 / 9	0 mm	35 °C	13 °C
2004	6–14 July	2 / 9	11 mm	27 °C	10 °C
2003	6–14 July	0 / 9	2 mm	36 °C	13 °C
2002	6–14 July	3 / 9	8 mm	30 °C	10 °C
2001	6–14 July	3 / 9	19 mm	29 °C	11 °C
2000	6–14 July	3 / 9	19 mm	34 °C	10 °C
1999	6–14 July	2 / 9	4 mm	29 °C	14 °C
1998	6–14 July	0 / 9	2 mm	33 °C	12 °C
1997	6–14 July	2 / 9	10 mm	30 °C	11 °C
1996	6–14 July	2 / 9	18 mm	30 °C	9 °C
1995	6–14 July	2 / 9	10 mm	32 °C	12 °C
1994	6–14 July	0 / 9	0 mm	32 °C	13 °C
1993	6–14 July	2 / 9	9 mm	31 °C	9 °C
1992	6–14 July	2 / 9	6 mm	30 °C	11 °C
1991	6–14 July	0 / 9	1 mm	35 °C	11 °C

How to read these numbers

ERA5 is a reanalysis on a 0.25° grid (about 25 km): it counts slightly more light-rain days than nearby weather stations (by about 5–7 percentage points) and gives daytime highs about 1–2.5 °C below station readings, so real hot days were hotter than shown here.
Edition window: the official programme days (main festival days, without camping or warm-up days before the start).
Dates of past editions follow the rule described in Wikipedia (es: Sanfermines): “Del 6 de julio a 14 de julio”. We applied it to 1991–2025, leaving out 2020–21 (cancelled or held differently).

Dates and sources

Coordinates: 42.817, -1.650; ERA5 cell centred at 42.75, -1.75 (average ground height of the cell 613 m).

San Fermín: what was the weather like at past editions?

Climate of the usual dates

Weather at past editions

How to read these numbers

Dates and sources

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