Syros 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: July – September
What is the weather like in Syros in January?
In January, Syros is cool: daytime highs average 13 °C, and nights cool down to about 10 °C. The sea averages 16.0 °C – swimming is only for the hardy. Expect around 4 hours of sunshine a day. Rain is frequent, with about 11 rainy days and 79 mm in total. It is often windy, with gusts of around 38 km/h. All in all, January is not an ideal month for a holiday in Syros.
January compared
How the weather changes from December to February. Tap a month to open it.
| DecemberDec | JanuaryJan | FebruaryFeb | |
|---|---|---|---|
| Score | 14 | 13 | 20 |
| Day | 14° | 13° | 13° |
| Night | 12° | 10° | 10° |
| Sea | 17° | 16° | 16° |
| Sun | 4 h | 4 h | 5 h |
| Rain days | 10 | 11 | 9 |
More details for January
- Daylight
- 9 h 51 min07:34 – 17:24
- UV index
- 2 · lowclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 38 km/haverage daily peakAll months
- Cloud cover
- 54 %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 %20 %
- Few rainy daysweight 20 %47 %
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
- Windproof jacket
Syros in January: quick answers
Is Syros hot in January?
No. In January, Syros is cool: daytime highs average 13 °C and nights drop to about 10 °C.
Can you swim in Syros in January?
Only if you don't mind cold water: in January the sea averages just 16.0 °C. Comfortable swimming is possible from June to October.
Does it rain much in Syros in January?
Rain is frequent, with about 11 rainy days and 79 mm in total.
Syros month by month
The whole year in SyrosAll destinations: GreeceGreek Islands weather in JanuaryWhere 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