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Saint-Jean-de-Luz weather by month
Historical averages 2016–2025 · not a forecast
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When is the best time to visit Saint-Jean-de-Luz?
For a warm holiday, the best week has been 17–23 August (Weather Index 94). Favourable start dates for a 7-day trip run from 17 July to 22 August. August is warmest (25°C), July is driest and May to August have the most sun.
- Warmest
- August 25°C
- Coolest
- January 12°C
- Driest
- July 29% rain-day chance
- Wettest
- November 55% rain-day chance
- Sunniest
- May to August 12 hours a day
A rain day has 1 mm or more, snow included, so a short shower counts. Monthly averages below give the amounts.
Monthly averages in Saint-Jean-de-Luz
Saint-Jean-de-Luz historical monthly estimates, 2016–2025. Temperatures and sunshine are daily averages.
| Month | High (°C) | Low (°C) | Rain-day chance (%) | Expected rain days | Precipitation (mm/month) | Sunshine (hours/day) |
|---|---|---|---|---|---|---|
| January | 12.2 | 7.1 | 49.4 | 15.3 | 153.5 | 6.3 |
| February | 14.2 | 7.9 | 41.1 | 11.5 | 101.6 | 7.8 |
| March | 15.2 | 9.1 | 48.4 | 15.0 | 114.5 | 9.3 |
| April | 17.1 | 10.8 | 43.3 | 13.0 | 89.8 | 10.6 |
| May | 19.4 | 13.5 | 46.8 | 14.5 | 97.5 | 11.8 |
| June | 22.5 | 17.0 | 42.7 | 12.8 | 97.8 | 11.7 |
| July | 24.2 | 18.8 | 29.4 | 9.1 | 49.1 | 12.4 |
| August | 24.9 | 19.0 | 32.9 | 10.2 | 63.2 | 11.9 |
| September | 23.4 | 17.0 | 39.0 | 11.7 | 102.6 | 10.4 |
| October | 20.7 | 14.5 | 39.4 | 12.2 | 108.3 | 8.3 |
| November | 15.9 | 10.6 | 54.7 | 16.4 | 192.4 | 6.9 |
| December | 13.7 | 8.9 | 45.2 | 14.0 | 158.2 | 6.0 |
Each month averages its own days. Precipitation includes snow. About the data
Sources
Open-Meteo · 1 Jan 2016 – 31 Dec 2025
- Open-Meteo Historical Weather API
- Local days, 2016–2025, every year weighted equally. Each weekly chart averages its own seven days, without smoothing.
- Shading shows the 10th–90th percentile of past days, not forecast confidence.
- A rain day has at least 1 mm, snow included. The last weekly period has eight days.
- Wind is the average daytime (10:00–18:00) maximum, not gusts. Daylight is calculated from latitude. Missing readings stay blank.
- Mugginess (dew point) comes from the original daily summaries, on UTC days.
- The live two-week forecast comes from the Open-Meteo Weather Forecast API. The Weather Index does not use it.