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Chios climate by month
What the weather is like
Chios has a hot-summer Mediterranean climate (Köppen Csa): dry, sunny summers and mild, wetter winters.
The warmest month is July, when afternoons average 32° and nights 22°. January is the coolest month, with highs of 14° and lows of 6°. The difference between the warmest and the coolest month is about 18°.
About 559 mm of precipitation falls in an average year. January is the wettest month (97 mm, 12 wet days) and August the driest (1 mm, 1 wet days). Cloud cover ranges from 1% in July to 35% in December.
The sea reaches about 23° in August. Sea temperatures lag the air by a month or two, so late summer is usually warmer for swimming than early summer.
Compared with Athens, the capital, Chios is 2.2° cooler on a July afternoon and receives more precipitation over the year.
Year in figures
- Hottest afternoons
- 32° · July
- Coldest nights
- 6° · January
- Wettest month
- January
- Driest month
- August
- Clearest skies
- July · 1% cloud
- Warmest sea
- 23° · August
- Longest day
- 14 h 49 min
- Shortest day
- 9 h 31 min
Twelve months at a glance
Temperature and precipitation
Daily high/low range bars, monthly precipitation columns, sea temperature lineTemperature curve
Average high, low and seaDaylight
Hours between sunrise and sunset on the 15th of each monthClimate normals month by month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Average high | 14° | 15° | 17° | 21° | 26° | 31° | 32° | 32° | 29° | 24° | 19° | 15° |
| Average low | 6° | 6° | 8° | 11° | 15° | 19° | 22° | 22° | 18° | 14° | 10° | 7° |
| Precipitation | 97 mm | 84 mm | 67 mm | 34 mm | 17 mm | 2 mm | 1 mm | 1 mm | 9 mm | 38 mm | 83 mm | 126 mm |
| Wet days (≥1 mm) | 11.7 | 10.5 | 7.9 | 6 | 5 | 3 | 0.9 | 0.6 | 2.8 | 5 | 8 | 11.7 |
| Cloud cover | 32% | 32% | 27% | 24% | 17% | 5% | 1% | 1% | 6% | 18% | 28% | 35% |
| Sea temperature | 16° | 16° | 16° | 16° | 19° | 22° | 23° | 23° | 23° | 21° | 19° | 17° |
| Daylight | 9h 47 | 10h 46 | 11h 54 | 13h 11 | 14h 15 | 14h 49 | 14h 35 | 13h 41 | 12h 28 | 11h 15 | 10h 07 | 9h 31 |
| Saharan dust haze | – | – | ● | ●● | ●● | ● | – | – | – | – | – | – |
| Month score | 48 | 56 | 76 | 86 | 85 | 70 | 67 | 68 | 77 | 88 | 81 | 55 |
Dust haze, monthly average 2015–2024: ● occasional, ●● frequent, ●●● very frequent