Marathon weather in January
Temperature, sea and sunshine in January: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in January
Poor
Best time to visit: June – September
What is the weather like in Marathon in January?
In January, Marathon is cool: daytime highs average 12 °C, and nights cool down to about 5 °C. The sea averages 14.9 °C – swimming is only for the hardy. The sun is scarce, with only about 3 hours a day. Rain falls on about 9 days, adding up to 58 mm. All in all, January is not an ideal month for a holiday in Marathon.
January compared
How the weather changes from December to February. Tap a month to open it.
| DecemberDec | JanuaryJan | FebruaryFeb | |
|---|---|---|---|
| Score | 13 | 15 | 19 |
| Day | 14° | 12° | 14° |
| Night | 7° | 5° | 6° |
| Sea | 17° | 15° | 15° |
| Sun | 3 h | 3 h | 5 h |
| Rain days | 9 | 9 | 8 |
More details for January
- Daylight
- 9 h 47 min07:39 – 17:26
- UV index
- 2 · lowclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 21 km/haverage daily peakAll months
- Cloud cover
- 56 %on averageAll months
- Hot days
- 0 days30 °C or moreAll months
- Time zone
- UTC+2Europe/Athens
How the score comes together
- Temperatureweight 35 %0 %
- Seaweight 25 %0 %
- Sunshineweight 20 %7 %
- Few rainy daysweight 20 %67 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in January
- A jumper for the evenings
- Rain jacket or umbrella
Marathon in January: quick answers
Is Marathon hot in January?
No. In January, Marathon is cool: daytime highs average 12 °C and nights drop to about 5 °C.
Can you swim in Marathon in January?
Only if you don't mind cold water: in January the sea averages just 14.9 °C. Comfortable swimming is possible from June to October.
Does it rain much in Marathon in January?
Rain falls on about 9 days, adding up to 58 mm.
Marathon month by month
The whole year in MarathonAll destinations: GreeceWhere to go in JanuarySea temperature in January
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences