Log visit
Spain
Formentera weather by month
Historical averages 2016–2025 · not a forecast
Loading your weather period…
When is the best time to visit Formentera?
For a warm holiday, the best week has been 17–23 June (Weather Index 99). Favourable start dates for a 7-day trip run from 1 June to 8 July. August is warmest (29°C), July is driest and June and July have the most sun.
- Warmest
- August 29°C
- Coolest
- January 15°C
- Driest
- July 2% rain-day chance
- Wettest
- November 24% rain-day chance
- Sunniest
- June and July 14 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 Formentera
Formentera 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 | 15.4 | 12.1 | 16.5 | 5.1 | 31.0 | 8.9 |
| February | 15.7 | 12.2 | 16.1 | 4.5 | 23.2 | 9.3 |
| March | 16.6 | 13.2 | 21.6 | 6.7 | 35.6 | 10.6 |
| April | 18.2 | 14.6 | 18.7 | 5.6 | 32.4 | 11.6 |
| May | 21.4 | 17.4 | 8.7 | 2.7 | 13.8 | 13.3 |
| June | 25.5 | 21.4 | 3.7 | 1.1 | 6.4 | 13.7 |
| July | 28.3 | 24.4 | 1.9 | 0.6 | 3.9 | 13.8 |
| August | 28.9 | 25.0 | 3.9 | 1.2 | 15.1 | 12.8 |
| September | 26.6 | 23.1 | 17.0 | 5.1 | 49.5 | 11.1 |
| October | 23.4 | 20.1 | 19.0 | 5.9 | 56.3 | 10.0 |
| November | 19.2 | 16.2 | 24.0 | 7.2 | 43.4 | 8.7 |
| December | 16.7 | 13.6 | 17.7 | 5.5 | 33.8 | 8.2 |
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.