Best time to visit Sifnos
The best time to visit Sifnos is April–July and September–November, judged on twenty years of weather records and the events worth going for.
Sifnos, South Aegean, Greece
°C
mm
- Average daily high and low
- Precipitation
- Good month
- Best month
- Made good or best by an event
| Month | Average daily high | Average daily low | Precipitation | Verdict |
|---|---|---|---|---|
| January | 14.2 °C / 58 °F | 12.3 °C / 54 °F | 76 mm / 3 in | good month |
| February | 14.2 °C / 58 °F | 12.5 °C / 55 °F | 64 mm / 2.5 in | good month |
| March | 15.1 °C / 59 °F | 13.5 °C / 56 °F | 38 mm / 1.5 in | good month |
| April | 16.8 °C / 62 °F | 15.3 °C / 60 °F | 15 mm / 0.6 in | best month |
| May | 19.8 °C / 68 °F | 18.4 °C / 65 °F | 10 mm / 0.4 in | best month |
| June | 23.7 °C / 75 °F | 22.3 °C / 72 °F | 3 mm / 0.1 in | best month |
| July | 25.9 °C / 79 °F | 24.4 °C / 76 °F | 1 mm / 0 in | best month |
| August | 26.2 °C / 79 °F | 24.9 °C / 77 °F | 2 mm / 0.1 in | good month |
| September | 24.3 °C / 76 °F | 23 °C / 73 °F | 8 mm / 0.3 in | best month |
| October | 21.2 °C / 70 °F | 19.9 °C / 68 °F | 29 mm / 1.2 in | best month |
| November | 18.5 °C / 65 °F | 17.1 °C / 63 °F | 37 mm / 1.4 in | best month |
| December | 15.8 °C / 60 °F | 14.1 °C / 57 °F | 70 mm / 2.8 in | good month |
Good and best months depend on more than temperature, rain and events. How they are chosen
Each activity on this page has its own good and best months, rated on twenty years of daily weather records. Which measures count, and how much, depends on the activity: humidity for exploring outdoors, wind for the beach, hiking and skiing, snow for skiing alone. Between them, the activities are rated on:
- Daytime highs
- Night-time lows
- How warm it feels
- Humidity
- How much of the day is sunny
- Hours of daylight
- Monthly rainfall
- How many days it rains
- Days of heavy rain
- Wind
- Snowfall and days with snow
- Major events, such as festivals
The chart shows the good and best months for exploring outdoors.
The event icon marks a month that an event lifts to good or best, such as a festival or a natural spectacle. Choose “Weather only” in the toolbar to rate the months on weather alone.
Best months by activity
Exploring outdoors
Mild days and nights, mostly dry and bright. The default for 'when should I go'.
- JJanuary: good
- FFebruary: good
- MMarch: good
- AApril: best
- MMay: best
- JJune: best
- JJuly: best
- AAugust: good
- SSeptember: best
- OOctober: best
- NNovember: best
- DDecember: good
- Best
- April–July, September–November
- Good
- August, December–March
Why these months
January · good
In its favour: share of daylight that is sunny 80%, precipitation 76 mm / 3 in, average daily high 14.2 °C / 58 °F, days with heavy rain 2.4 days, average daily low 12.3 °C / 54 °F, wet days 11.3 days, relative humidity 71%.
Against: feels like (high) 10.4 °C / 51 °F.
February · good
In its favour: share of daylight that is sunny 84%, precipitation 64 mm / 2.5 in, days with heavy rain 2 days, average daily high 14.2 °C / 58 °F, wet days 9.3 days, average daily low 12.5 °C / 55 °F, relative humidity 72%.
Against: feels like (high) 10.7 °C / 51 °F.
March · good
In its favour: precipitation 38 mm / 1.5 in, share of daylight that is sunny 86%, feels like (high) 12.5 °C / 55 °F, days with heavy rain 1 days, wet days 6.7 days, average daily high 15.1 °C / 59 °F, average daily low 13.5 °C / 56 °F, relative humidity 73%.
April · best
In its favour: feels like (high) 15.6 °C / 60 °F, precipitation 15 mm / 0.6 in, share of daylight that is sunny 91%, average daily high 16.8 °C / 62 °F, wet days 2.4 days, days with heavy rain 0.3 days, average daily low 15.3 °C / 60 °F, relative humidity 76%.
May · best
In its favour: feels like (high) 20.6 °C / 69 °F, average daily high 19.8 °C / 68 °F, precipitation 10 mm / 0.4 in, share of daylight that is sunny 90%, wet days 1.9 days, days with heavy rain 0.1 days, average daily low 18.4 °C / 65 °F.
Against: relative humidity 79%.
June · best
In its favour: feels like (high) 25.8 °C / 78 °F, average daily high 23.7 °C / 75 °F, precipitation 3 mm / 0.1 in, share of daylight that is sunny 95%, wet days 0.6 days, days with heavy rain 0 days.
Against: relative humidity 78%, average daily low 22.3 °C / 72 °F.
July · best
In its favour: feels like (high) 27.5 °C / 82 °F, average daily high 25.9 °C / 79 °F, precipitation 1 mm / 0 in, share of daylight that is sunny 94%, wet days 0.1 days, days with heavy rain 0 days, relative humidity 76%.
Against: average daily low 24.4 °C / 76 °F.
August · good
In its favour: feels like (high) 28 °C / 82 °F, precipitation 2 mm / 0.1 in, share of daylight that is sunny 96%, average daily high 26.2 °C / 79 °F, wet days 0.2 days, days with heavy rain 0.1 days.
Against: average daily low 24.9 °C / 77 °F, relative humidity 77%.
September · best
In its favour: feels like (high) 25.2 °C / 77 °F, average daily high 24.3 °C / 76 °F, precipitation 8 mm / 0.3 in, share of daylight that is sunny 94%, wet days 1.5 days, days with heavy rain 0.2 days, relative humidity 75%.
Against: average daily low 23 °C / 73 °F.
October · best
In its favour: feels like (high) 20.4 °C / 69 °F, average daily high 21.2 °C / 70 °F, precipitation 29 mm / 1.2 in, share of daylight that is sunny 89%, wet days 3.8 days, days with heavy rain 1.1 days, average daily low 19.9 °C / 68 °F, relative humidity 75%.
November · best
In its favour: feels like (high) 16.5 °C / 62 °F, average daily high 18.5 °C / 65 °F, precipitation 37 mm / 1.4 in, share of daylight that is sunny 88%, wet days 5.7 days, days with heavy rain 1.2 days, average daily low 17.1 °C / 63 °F, relative humidity 74%.
December · good
In its favour: share of daylight that is sunny 80%, precipitation 70 mm / 2.8 in, average daily high 15.8 °C / 60 °F, feels like (high) 12.7 °C / 55 °F, days with heavy rain 2.5 days, wet days 9.3 days, average daily low 14.1 °C / 57 °F, relative humidity 72%.
Beach and swimming
Hot, dry and sunny. Penalises the monsoon hard.
- JJanuary: neither
- FFebruary: neither
- MMarch: neither
- AApril: neither
- MMay: neither
- JJune: best
- JJuly: best
- AAugust: best
- SSeptember: best
- OOctober: good
- NNovember: neither
- DDecember: neither
- Best
- June–September
- Good
- October
Why these months
June · best
In its favour: precipitation 3 mm / 0.1 in, share of daylight that is sunny 95%, wet days 0.6 days, days with heavy rain 0 days, feels like (high) 25.8 °C / 78 °F, average daily high 23.7 °C / 75 °F, average daily low 22.3 °C / 72 °F, wind (daily max) 28 km/h / 17 mph.
July · best
In its favour: precipitation 1 mm / 0 in, average daily high 25.9 °C / 79 °F, share of daylight that is sunny 94%, feels like (high) 27.5 °C / 82 °F, wet days 0.1 days, days with heavy rain 0 days, average daily low 24.4 °C / 76 °F.
Against: wind (daily max) 32 km/h / 20 mph.
August · best
In its favour: average daily high 26.2 °C / 79 °F, precipitation 2 mm / 0.1 in, share of daylight that is sunny 96%, feels like (high) 28 °C / 82 °F, wet days 0.2 days, days with heavy rain 0.1 days, average daily low 24.9 °C / 77 °F.
Against: wind (daily max) 33 km/h / 20 mph.
September · best
In its favour: precipitation 8 mm / 0.3 in, share of daylight that is sunny 94%, average daily high 24.3 °C / 76 °F, wet days 1.5 days, days with heavy rain 0.2 days, feels like (high) 25.2 °C / 77 °F, average daily low 23 °C / 73 °F.
Against: wind (daily max) 32 km/h / 20 mph.
October · good
In its favour: precipitation 29 mm / 1.2 in, share of daylight that is sunny 89%, wet days 3.8 days, days with heavy rain 1.1 days, average daily low 19.9 °C / 68 °F.
Against: average daily high 21.2 °C / 70 °F, feels like (high) 20.4 °C / 69 °F, wind (daily max) 33 km/h / 20 mph.
Hiking and trekking
Cool enough to climb in, dry enough to enjoy, long enough days.
- JJanuary: good
- FFebruary: best
- MMarch: best
- AApril: best
- MMay: best
- JJune: good
- JJuly: neither
- AAugust: neither
- SSeptember: good
- OOctober: best
- NNovember: best
- DDecember: best
- Best
- February–May, October–December
- Good
- January, June, September
Why these months
January · good
In its favour: average daily high 14.2 °C / 58 °F, precipitation 76 mm / 3 in, days with heavy rain 2.4 days, average daily low 12.3 °C / 54 °F, share of daylight that is sunny 80%, feels like (high) 10.4 °C / 51 °F, wet days 11.3 days.
Against: daylight per day 10 h, wind (daily max) 38 km/h / 24 mph.
February · best
In its favour: average daily high 14.2 °C / 58 °F, precipitation 64 mm / 2.5 in, days with heavy rain 2 days, wet days 9.3 days, average daily low 12.5 °C / 55 °F, share of daylight that is sunny 84%, feels like (high) 10.7 °C / 51 °F, daylight per day 10.8 h.
Against: wind (daily max) 38 km/h / 23 mph.
March · best
In its favour: average daily high 15.1 °C / 59 °F, precipitation 38 mm / 1.5 in, wet days 6.7 days, days with heavy rain 1 days, feels like (high) 12.5 °C / 55 °F, average daily low 13.5 °C / 56 °F, share of daylight that is sunny 86%, daylight per day 12 h.
Against: wind (daily max) 36 km/h / 22 mph.
April · best
In its favour: average daily high 16.8 °C / 62 °F, precipitation 15 mm / 0.6 in, wet days 2.4 days, days with heavy rain 0.3 days, feels like (high) 15.6 °C / 60 °F, share of daylight that is sunny 91%, daylight per day 13.2 h, average daily low 15.3 °C / 60 °F, wind (daily max) 32 km/h / 20 mph.
May · best
In its favour: average daily high 19.8 °C / 68 °F, precipitation 10 mm / 0.4 in, wet days 1.9 days, days with heavy rain 0.1 days, feels like (high) 20.6 °C / 69 °F, share of daylight that is sunny 90%, daylight per day 14.1 h, wind (daily max) 28 km/h / 17 mph.
Against: average daily low 18.4 °C / 65 °F.
June · good
In its favour: precipitation 3 mm / 0.1 in, average daily high 23.7 °C / 75 °F, wet days 0.6 days, days with heavy rain 0 days, share of daylight that is sunny 95%, daylight per day 14.7 h, feels like (high) 25.8 °C / 78 °F, wind (daily max) 28 km/h / 17 mph.
Against: average daily low 22.3 °C / 72 °F.
September · good
In its favour: precipitation 8 mm / 0.3 in, average daily high 24.3 °C / 76 °F, wet days 1.5 days, days with heavy rain 0.2 days, share of daylight that is sunny 94%, daylight per day 12.4 h, feels like (high) 25.2 °C / 77 °F, wind (daily max) 32 km/h / 20 mph.
Against: average daily low 23 °C / 73 °F.
October · best
In its favour: average daily high 21.2 °C / 70 °F, precipitation 29 mm / 1.2 in, wet days 3.8 days, days with heavy rain 1.1 days, feels like (high) 20.4 °C / 69 °F, share of daylight that is sunny 89%, daylight per day 11.2 h, wind (daily max) 33 km/h / 20 mph.
Against: average daily low 19.9 °C / 68 °F.
November · best
In its favour: average daily high 18.5 °C / 65 °F, precipitation 37 mm / 1.4 in, wet days 5.7 days, days with heavy rain 1.2 days, feels like (high) 16.5 °C / 62 °F, share of daylight that is sunny 88%, daylight per day 10.2 h.
Against: average daily low 17.1 °C / 63 °F, wind (daily max) 34 km/h / 21 mph.
December · best
In its favour: average daily high 15.8 °C / 60 °F, precipitation 70 mm / 2.8 in, wet days 9.3 days, feels like (high) 12.7 °C / 55 °F, share of daylight that is sunny 80%, days with heavy rain 2.5 days, average daily low 14.1 °C / 57 °F.
Against: daylight per day 9.7 h, wind (daily max) 36 km/h / 23 mph.
An activity is listed only where it applies: skiing at ski destinations, beach and swimming at beach destinations. The nearest ski area is Χιονοδρομικό Κέντρο Καλαβρύτων, Kalavrita Ski Resort, 244 km away.
Weather averages
Monthly averages over twenty years, 2006–2025. Highs, lows and precipitation are in the chart at the top.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Feels like (high) | 10.4 °C | 10.7 °C | 12.5 °C | 15.6 °C | 20.6 °C | 25.8 °C | 27.5 °C | 28 °C | 25.2 °C | 20.4 °C | 16.5 °C | 12.7 °C |
| Days with heavy rain | 2.4 days | 2 days | 1 days | 0.3 days | 0.1 days | 0 days | 0 days | 0.1 days | 0.2 days | 1.1 days | 1.2 days | 2.5 days |
| Time rain usually falls | 6 am | 12 am | 5 pm | 11 am | 9 am | 12 pm | 5 am | 11 am | 9 pm | 5 am | 7 am | 2 am |
| Sunshine per day | 7.9 h | 9.1 h | 10.3 h | 12 h | 12.8 h | 13.9 h | 13.5 h | 12.9 h | 11.7 h | 10 h | 8.9 h | 7.8 h |
| Relative humidity | 71% | 72% | 73% | 76% | 79% | 78% | 76% | 77% | 75% | 75% | 74% | 72% |
Sea temperature
Averaged over a shorter period (2022–2025) than the twenty-year averages above.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature 2022–2025 | 16.8 °C | 16.3 °C | 16.6 °C | 17 °C | 18.7 °C | 22.4 °C | 24.7 °C | 25.7 °C | 24.6 °C | 22.8 °C | 20.5 °C | 18.5 °C |
| Sea temperature (daily max) 2022–2025 | 16.9 °C | 16.4 °C | 16.8 °C | 17.2 °C | 19 °C | 22.8 °C | 25 °C | 26 °C | 24.9 °C | 23 °C | 20.6 °C | 18.6 °C |
- Very cold 10 °C or less
- Cold 10 to 15 °C
- Cool 15 to 20 °C
- Comfortable 20 to 25 °C
- Warm 25 to 28 °C
- Very warm over 28 °C
The words describe how the water feels to swim in. They are ours, not an official standard.
Air quality
Averaged over a shorter period (2022–2025) than the twenty-year averages above, and not counted towards good or best months.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Air pollution (PM2.5) 2022–2025 | 7.6 µg/m³ | 7.3 µg/m³ | 8.6 µg/m³ | 9 µg/m³ | 8.9 µg/m³ | 7.9 µg/m³ | 8.7 µg/m³ | 8 µg/m³ | 7.7 µg/m³ | 7.4 µg/m³ | 7.8 µg/m³ | 5.7 µg/m³ |
| Air pollution (PM2.5, daily peak) 2022–2025 | 11.1 µg/m³ | 10.4 µg/m³ | 12.2 µg/m³ | 13.5 µg/m³ | 13.9 µg/m³ | 12.4 µg/m³ | 13.9 µg/m³ | 11.9 µg/m³ | 11.4 µg/m³ | 11 µg/m³ | 11 µg/m³ | 8.4 µg/m³ |
- Good 15 µg/m³ or less
- Fair 15 to 25 µg/m³
- Moderate 25 to 37.5 µg/m³
- Poor 37.5 to 50 µg/m³
- Very poor 50 to 75 µg/m³
- Extremely poor over 75 µg/m³
Each figure is compared with the World Health Organization's guideline for a day's air, 15 µg/m³ or less, and with its interim targets above that. The words are ours: the WHO does not name its steps. The figures are modelled monthly averages, so single days can be well above them. The daily peak is the average of each day's highest hour, shaded on the same scale.