Chios in Summer
In summer (June, July and August), Chios sees average daytime highs around 27°C and overnight lows near 23°C, with 4 mm of rain over about 1 wet days across the season. It is the warmest season of the year and the driest season of the year.
Over the season highs climb from about 24°C in early June to 27°C by late August. The sky is clear or mostly clear about 96% of the time across summer, and the air most often feels humid.
Summer is Chios's best season of the year to visit on our travel score. For the whole year in context, see Chios's year-round climate.
- Avg daytime high
- 27°C
- warmest season of the year
- Avg overnight low
- 23°C
- Rainfall
- 4 mm
- 1 wet days
- Avg wind
- 22 km/h
- Travel score
- 8.8
- best season of the year
- Months
- Jun · Jul · Aug
Temperature in Chios in Summer
Over the season highs climb from about 24°C in early June to 27°C by late August.
A typical summer day in Chios reaches about 27°C and drops to 23°C overnight. The warmest of the three months is July, the coolest June.
Chios weather by month
How the three summer months (June, July and August) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 13° / 10° | 117 | 11.5 | 9.6 | 3.5 |
| Feb | 13° / 10° | 96 | 10.3 | 10.5 | 3.7 |
| Mar | 15° / 11° | 68 | 7.9 | 11.7 | 4.8 |
| Apr | 18° / 14° | 37 | 5.6 | 13 | 6.6 |
| May | 22° / 17° | 16 | 2.9 | 14.1 | 8.3 |
| Jun | 26° / 21° | 4 | 0.9 | 14.6 | 9.1 |
| Jul | 28° / 23° | 0 | 0.1 | 14.4 | 8.7 |
| Aug | 28° / 24° | 0 | 0.1 | 13.5 | 8.5 |
| Sep | 25° / 21° | 16 | 1.8 | 12.3 | 9.1 |
| Oct | 21° / 18° | 47 | 4.7 | 11 | 7.9 |
| Nov | 17° / 14° | 85 | 8.4 | 9.9 | 6.1 |
| Dec | 14° / 11° | 130 | 11.9 | 9.4 | 4.0 |
Cloud cover in Summer
The sky is clear or mostly clear about 96% of the time across summer.
Chance of precipitation in Summer
Chios gets around 4 mm of rain over 1 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 22 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 14 h 30 min in early June to 12 h 54 min by late August. The lit band spans sunrise to sunset each day.
Solar energy in Summer
Average shortwave solar energy reaching the ground each day across summer, about 7.6 kWh/m².
Hazard calendar for Chios
None of Chios's seasonal hazards peak in summer. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do.
Chios's rainy season runs November–March, when most of the year's rain falls.
Is summer a good time to visit Chios?
Our two travel scores rate summer for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
summer is one of the better times to visit Chios for general sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Chios in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Chios sees daytime highs around 27°C and nights near 23°C. Pack light clothes and sun protection. Worth having: a windbreaker.
Sea temperature near Chios in Summer
The nearest coast averages about 23°C across summer — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea offshore is warmest in August at about 23°C and coldest in March near 16°C.
It's comfortable for a long swim from Jun 1 to Oct 30 — about 5 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 16 | 16 | 16 | 16 | 19 | 22 | 23 | 23 | 23 | 21 | 19 | 17 |
| Comfort | Cool | Cool | Cool | Cool | Cool | Refreshing | Refreshing | Refreshing | Refreshing | Refreshing | Cool | Cool |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 16 | Cool |
| Feb | 16 | Cool |
| Mar | 16 | Cool |
| Apr | 16 | Cool |
| May | 19 | Cool |
| Jun | 22 | Refreshing |
| Jul | 23 | Refreshing |
| Aug | 23 | Refreshing |
| Sep | 23 | Refreshing |
| Oct | 21 | Refreshing |
| Nov | 19 | Cool |
| Dec | 17 | Cool |
UV index in Chios in Summer
Clear-sky midday UV across summer averages around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Chios peaks around June 23 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 at about 2 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 2 | 3 | 4 | 8 | 7 | 9 | 9 | 9 | 7 | 5 | 3 | 2 |
| Level | Low | Moderate | Moderate | Very high | Very high | Very high | Very high | Very high | Very high | Moderate | Moderate | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 2 | Low |
| Feb | 3 | Moderate |
| Mar | 4 | Moderate |
| Apr | 8 | Very high |
| May | 7 | Very high |
| Jun | 9 | Very high |
| Jul | 9 | Very high |
| Aug | 9 | Very high |
| Sep | 7 | Very high |
| Oct | 5 | Moderate |
| Nov | 3 | Moderate |
| Dec | 2 | Low |
Air quality in Chios in Summer
Average fine-particle pollution (PM2.5) through the year — so you can see where summer falls, not just the annual average.
Air quality in Chios is worst in March — around 15 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (December, 8 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 10 | 12 | 15 | 14 | 13 | 12 | 12 | 12 | 10 | 10 | 11 | 8 |
| Level | Good | Moderate | Moderate | Moderate | Moderate | Good | Moderate | Moderate | Good | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 10 | Good |
| Feb | 12 | Moderate |
| Mar | 15 | Moderate |
| Apr | 14 | Moderate |
| May | 13 | Moderate |
| Jun | 12 | Good |
| Jul | 12 | Moderate |
| Aug | 12 | Moderate |
| Sep | 10 | Good |
| Oct | 10 | Good |
| Nov | 11 | Good |
| Dec | 8 | Good |
Where is Chios?
Chios sits at 38.4°N, 26.1°E, 9 m above sea level, in Greece. The nearest listed city is Çeşme, 15 km away.
Topography around Chios
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Chios.
Within 3 km, the terrain around Chios has significant variations in elevation — a maximum elevation change of 359 m around an average of 41 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 919 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,255 m.
The land around Chios is covered by water (44%) and grassland (20%) within 3 km, water (50%) within 16 km, and water (80%) within 80 km.
Greece travel facts
- Travel advisory
- Level 1
- Exercise Normal Precautions
- Power plugs
- Type C / F
- 230 V · 50 Hz
- Prices
- ≈ 60% of US
- price level, 2025
- GDP per capita
- $26,948
- 2025
- Happiness
- 5.7 / 10
- World Happiness, 2025
- Safe drinking water
- 97%
- of population, 2024
- Homicide rate
- 0.8
- per 100k, 2023
- Road deaths
- 8.3
- per 100k/yr, 2019
- Income group
- High
- World Bank
- English
- High
- EF EPI 592
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Chios (38.3687°, 26.1372°, elevation 9 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.