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Keratsíni weather by month
Historical averages 2016–2025 · not a forecast
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When is the best time to visit Keratsíni?
For a warm holiday, the best week has been 12–18 September (Weather Index 97). Several start dates remain plausible, and the best timing varies between years. July and August are warmest (33°C), July and August are driest and June and July have the most sun.
- Warmest
- July and August 33°C
- Coolest
- January 14°C
- Driest
- July and August 5% rain-day chance
- Wettest
- January 27% 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 Keratsíni
Keratsíni 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 | 13.6 | 7.9 | 27.1 | 8.4 | 52.8 | 7.5 |
| February | 14.9 | 8.6 | 25.0 | 7.0 | 41.8 | 8.4 |
| March | 17.1 | 10.3 | 21.0 | 6.5 | 40.3 | 9.9 |
| April | 21.0 | 13.1 | 16.7 | 5.0 | 29.9 | 11.6 |
| May | 25.3 | 17.1 | 17.1 | 5.3 | 22.0 | 12.4 |
| June | 30.7 | 22.2 | 13.0 | 3.9 | 19.1 | 13.8 |
| July | 33.5 | 25.1 | 4.8 | 1.5 | 7.2 | 13.7 |
| August | 32.7 | 25.0 | 5.2 | 1.6 | 10.2 | 12.8 |
| September | 28.9 | 21.6 | 9.7 | 2.9 | 20.4 | 11.3 |
| October | 23.9 | 17.2 | 11.0 | 3.4 | 28.5 | 9.5 |
| November | 19.5 | 13.9 | 23.0 | 6.9 | 47.8 | 8.0 |
| December | 15.4 | 10.3 | 26.5 | 8.2 | 55.5 | 7.2 |
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.