Chios weather in September
In September, Chios sees average daytime highs of 25°C and overnight lows near 21°C, with 16 mm of rain across 1.8 wet days and about 12.3 hours of daylight. It is the 4th-warmest and 8th-wettest month of the year here.
Highs ease over the month, from about 27°C in the first days to 24°C by the end. The sky is clear or mostly clear about 89% of the time in September, and the air most often feels humid.
Daylight stretches from about 12 h 54 min at the start of September to 11 h 36 min by month's end. Set against the rest of the year, September is Chios's 4th-clearest and 8th-windiest month. For the whole year in context, see Chios's year-round climate.
- Daytime high
- 25°
- 4th warmest
- Overnight low
- 21°
- 9th coldest
- Rainfall
- 16 mm
- 1.8 wet days
- Daylight
- 12 h 12 min
- 6:02 AM – 6:17 PM
- Cloud cover
- 13%
- 4th clearest
- Wind
- 20 km/h
- 8th windiest
- Solar energy
- 5.61 kWh/m²
- Travel score
- 9.1
- out of 10
Chios is Greek town on the homonymous island.
- Founded
- ~899 BCE
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in September
Highs ease over the month, from about 27°C in the first days to 24°C by the end.
A typical September day in Chios reaches about 25°C in the afternoon and slips back to 21°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 23°C and 27°C. Set against its neighbours, September runs about 3°C cooler than August and about 4°C warmer than October.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 27 | 27 | 27 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 23 |
| Avg low (°C) | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 27 | 22 |
| 2 | 27 | 22 |
| 3 | 27 | 22 |
| 4 | 26 | 22 |
| 5 | 26 | 22 |
| 6 | 26 | 22 |
| 7 | 26 | 22 |
| 8 | 26 | 22 |
| 9 | 26 | 22 |
| 10 | 26 | 22 |
| 11 | 26 | 22 |
| 12 | 26 | 21 |
| 13 | 25 | 21 |
| 14 | 25 | 21 |
| 15 | 25 | 21 |
| 16 | 25 | 21 |
| 17 | 25 | 21 |
| 18 | 25 | 21 |
| 19 | 25 | 21 |
| 20 | 25 | 21 |
| 21 | 25 | 21 |
| 22 | 24 | 20 |
| 23 | 24 | 20 |
| 24 | 24 | 20 |
| 25 | 24 | 20 |
| 26 | 24 | 20 |
| 27 | 24 | 20 |
| 28 | 24 | 20 |
| 29 | 24 | 20 |
| 30 | 23 | 20 |
Chios weather by month
How September compares with the rest of the year at a glance. September is the 4th-warmest and 8th-wettest month here — the current month is highlighted below.
| 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 September
The sky is clear or mostly clear about 89% of the time in September.
Beyond those clear spells, partly cloudy skies cover about 5% of September, with mostly cloudy or overcast conditions the remaining 6%. Skies tend to cloud over as the month goes on.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 99 | 99 | 99 | 98 | 98 | 98 | 97 | 97 | 97 | 97 | 97 | 97 | 96 | 95 | 95 | 95 | 95 | 94 | 93 | 93 | 92 | 92 | 92 | 92 | 90 | 90 | 90 | 90 | 88 | 88 |
| Cloudier (%) | 1 | 1 | 1 | 2 | 2 | 2 | 3 | 3 | 3 | 3 | 3 | 3 | 4 | 5 | 5 | 5 | 5 | 6 | 7 | 7 | 8 | 8 | 8 | 8 | 10 | 10 | 10 | 10 | 12 | 12 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 99 | 1 |
| 2 | 99 | 1 |
| 3 | 99 | 1 |
| 4 | 98 | 2 |
| 5 | 98 | 2 |
| 6 | 98 | 2 |
| 7 | 97 | 3 |
| 8 | 97 | 3 |
| 9 | 97 | 3 |
| 10 | 97 | 3 |
| 11 | 97 | 3 |
| 12 | 97 | 3 |
| 13 | 96 | 4 |
| 14 | 95 | 5 |
| 15 | 95 | 5 |
| 16 | 95 | 5 |
| 17 | 95 | 5 |
| 18 | 94 | 6 |
| 19 | 93 | 7 |
| 20 | 93 | 7 |
| 21 | 92 | 8 |
| 22 | 92 | 8 |
| 23 | 92 | 8 |
| 24 | 92 | 8 |
| 25 | 90 | 10 |
| 26 | 90 | 10 |
| 27 | 90 | 10 |
| 28 | 90 | 10 |
| 29 | 88 | 12 |
| 30 | 88 | 12 |
Chance of precipitation in September
Chios gets around 16 mm of rain over 1.8 wet days in September. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 6% and peaks near 11% on the wettest days. The odds climb toward the end of the month.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 2 | 2 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 4 | 4 | 4 | 4 | 5 | 5 | 6 | 6 | 7 | 7 | 8 | 8 | 9 | 9 | 9 | 10 | 10 | 10 | 11 |
| Rain chance (%) | |
|---|---|
| 1 | 2 |
| 2 | 2 |
| 3 | 3 |
| 4 | 3 |
| 5 | 3 |
| 6 | 3 |
| 7 | 3 |
| 8 | 3 |
| 9 | 3 |
| 10 | 3 |
| 11 | 3 |
| 12 | 4 |
| 13 | 4 |
| 14 | 4 |
| 15 | 4 |
| 16 | 5 |
| 17 | 5 |
| 18 | 6 |
| 19 | 6 |
| 20 | 7 |
| 21 | 7 |
| 22 | 8 |
| 23 | 8 |
| 24 | 9 |
| 25 | 9 |
| 26 | 9 |
| 27 | 10 |
| 28 | 10 |
| 29 | 10 |
| 30 | 11 |
Humidity in September
Most of September feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, September lands in the humid band about 36% of days. Sticky, muggy-or-worse air turns up on roughly 29% of them.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 4 | 4 | 5 | 5 | 6 | 6 | 7 | 7 | 7 | 7 | 8 | 8 | 8 | 9 | 9 | 10 | 10 | 11 | 11 | 12 | 13 | 14 | 15 | 15 | 16 | 17 | 18 | 18 | 19 | 19 |
| Comfortable (%) | 16 | 17 | 19 | 20 | 21 | 22 | 23 | 23 | 24 | 24 | 24 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 26 | 26 | 26 | 26 | 27 | 27 |
| Humid (%) | 38 | 38 | 37 | 37 | 37 | 37 | 37 | 37 | 37 | 37 | 37 | 37 | 37 | 37 | 37 | 37 | 36 | 36 | 36 | 36 | 35 | 35 | 35 | 35 | 35 | 35 | 35 | 35 | 35 | 35 |
| Muggy (%) | 39 | 38 | 37 | 35 | 34 | 33 | 32 | 32 | 31 | 30 | 30 | 30 | 29 | 29 | 28 | 28 | 28 | 27 | 27 | 26 | 26 | 25 | 24 | 23 | 23 | 22 | 21 | 20 | 20 | 19 |
| Oppressive (%) | 3 | 3 | 2 | 2 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | |
|---|---|---|---|---|---|
| 1 | 4 | 16 | 38 | 39 | 3 |
| 2 | 4 | 17 | 38 | 38 | 3 |
| 3 | 5 | 19 | 37 | 37 | 2 |
| 4 | 5 | 20 | 37 | 35 | 2 |
| 5 | 6 | 21 | 37 | 34 | 2 |
| 6 | 6 | 22 | 37 | 33 | 2 |
| 7 | 7 | 23 | 37 | 32 | 2 |
| 8 | 7 | 23 | 37 | 32 | 2 |
| 9 | 7 | 24 | 37 | 31 | 1 |
| 10 | 7 | 24 | 37 | 30 | 1 |
| 11 | 8 | 24 | 37 | 30 | 1 |
| 12 | 8 | 25 | 37 | 30 | 1 |
| 13 | 8 | 25 | 37 | 29 | 1 |
| 14 | 9 | 25 | 37 | 29 | 1 |
| 15 | 9 | 25 | 37 | 28 | 1 |
| 16 | 10 | 25 | 37 | 28 | 1 |
| 17 | 10 | 25 | 36 | 28 | 1 |
| 18 | 11 | 25 | 36 | 27 | 1 |
| 19 | 11 | 25 | 36 | 27 | 1 |
| 20 | 12 | 25 | 36 | 26 | 1 |
| 21 | 13 | 25 | 35 | 26 | 1 |
| 22 | 14 | 25 | 35 | 25 | 1 |
| 23 | 15 | 25 | 35 | 24 | 1 |
| 24 | 15 | 25 | 35 | 23 | 1 |
| 25 | 16 | 26 | 35 | 23 | 1 |
| 26 | 17 | 26 | 35 | 22 | 1 |
| 27 | 18 | 26 | 35 | 21 | 1 |
| 28 | 18 | 26 | 35 | 20 | 0 |
| 29 | 19 | 27 | 35 | 20 | 0 |
| 30 | 19 | 27 | 35 | 19 | 0 |
Wind in September
Winds average 20 km/h in September.
Across September, daily wind ranges from about 19 km/h on the calmest days to 22 km/h at its breeziest. It stays fairly steady from day to day.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 22 | 22 | 22 | 22 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 19 | 19 | 19 | 19 |
| Feels | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 22 | breezy |
| 2 | 22 | breezy |
| 3 | 22 | breezy |
| 4 | 22 | breezy |
| 5 | 21 | breezy |
| 6 | 21 | breezy |
| 7 | 21 | breezy |
| 8 | 21 | breezy |
| 9 | 21 | breezy |
| 10 | 21 | breezy |
| 11 | 21 | breezy |
| 12 | 21 | breezy |
| 13 | 20 | breezy |
| 14 | 20 | breezy |
| 15 | 20 | breezy |
| 16 | 20 | breezy |
| 17 | 20 | breezy |
| 18 | 20 | light breeze |
| 19 | 20 | light breeze |
| 20 | 20 | light breeze |
| 21 | 20 | light breeze |
| 22 | 20 | light breeze |
| 23 | 20 | light breeze |
| 24 | 20 | light breeze |
| 25 | 20 | light breeze |
| 26 | 20 | light breeze |
| 27 | 19 | light breeze |
| 28 | 19 | light breeze |
| 29 | 19 | light breeze |
| 30 | 19 | light breeze |
Sunrise & sunset in September
Daylight runs from about 12 h 54 min at the start of September to 11 h 36 min by month's end. The lit band spans sunrise to sunset each day.
Days shrink by about 78 minutes over September. Sunrise moves from 5:49 AM to 6:15 AM, and sunset from 6:41 PM to 5:54 PM.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 12.9 | 12.8 | 12.8 | 12.7 | 12.7 | 12.7 | 12.6 | 12.6 | 12.5 | 12.5 | 12.5 | 12.4 | 12.4 | 12.3 | 12.3 | 12.2 | 12.2 | 12.2 | 12.1 | 12.1 | 12.0 | 12.0 | 11.9 | 11.9 | 11.9 | 11.8 | 11.8 | 11.7 | 11.7 | 11.6 |
| Sunrise (AM) | 5:49 | 5:50 | 5:51 | 5:52 | 5:53 | 5:53 | 5:54 | 5:55 | 5:56 | 5:57 | 5:58 | 5:59 | 6:00 | 6:01 | 6:02 | 6:02 | 6:03 | 6:04 | 6:05 | 6:06 | 6:07 | 6:08 | 6:09 | 6:10 | 6:11 | 6:12 | 6:12 | 6:13 | 6:14 | 6:15 |
| Sunset (PM) | 6:41 | 6:40 | 6:38 | 6:37 | 6:35 | 6:33 | 6:32 | 6:30 | 6:29 | 6:27 | 6:25 | 6:24 | 6:22 | 6:20 | 6:19 | 6:17 | 6:15 | 6:14 | 6:12 | 6:11 | 6:09 | 6:07 | 6:06 | 6:04 | 6:02 | 6:01 | 5:59 | 5:57 | 5:56 | 5:54 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 12.9 | 5:49 | 6:41 |
| 2 | 12.8 | 5:50 | 6:40 |
| 3 | 12.8 | 5:51 | 6:38 |
| 4 | 12.7 | 5:52 | 6:37 |
| 5 | 12.7 | 5:53 | 6:35 |
| 6 | 12.7 | 5:53 | 6:33 |
| 7 | 12.6 | 5:54 | 6:32 |
| 8 | 12.6 | 5:55 | 6:30 |
| 9 | 12.5 | 5:56 | 6:29 |
| 10 | 12.5 | 5:57 | 6:27 |
| 11 | 12.5 | 5:58 | 6:25 |
| 12 | 12.4 | 5:59 | 6:24 |
| 13 | 12.4 | 6:00 | 6:22 |
| 14 | 12.3 | 6:01 | 6:20 |
| 15 | 12.3 | 6:02 | 6:19 |
| 16 | 12.2 | 6:02 | 6:17 |
| 17 | 12.2 | 6:03 | 6:15 |
| 18 | 12.2 | 6:04 | 6:14 |
| 19 | 12.1 | 6:05 | 6:12 |
| 20 | 12.1 | 6:06 | 6:11 |
| 21 | 12.0 | 6:07 | 6:09 |
| 22 | 12.0 | 6:08 | 6:07 |
| 23 | 11.9 | 6:09 | 6:06 |
| 24 | 11.9 | 6:10 | 6:04 |
| 25 | 11.9 | 6:11 | 6:02 |
| 26 | 11.8 | 6:12 | 6:01 |
| 27 | 11.8 | 6:12 | 5:59 |
| 28 | 11.7 | 6:13 | 5:57 |
| 29 | 11.7 | 6:14 | 5:56 |
| 30 | 11.6 | 6:15 | 5:54 |
Solar energy in September
Average shortwave solar energy reaching the ground each day in September, about 5.61 kWh/m².
For context, solar energy here swings from a low near 2.05 kWh/m² to a high of 7.84 kWh/m² in June across the year — September's 5.61 kWh/m² falls in the middle.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 6.4 | 6.3 | 6.3 | 6.2 | 6.2 | 6.1 | 6.1 | 6.0 | 6.0 | 5.9 | 5.9 | 5.8 | 5.8 | 5.7 | 5.6 | 5.6 | 5.5 | 5.5 | 5.4 | 5.4 | 5.3 | 5.3 | 5.2 | 5.1 | 5.1 | 5.0 | 5.0 | 4.9 | 4.9 | 4.8 |
| Level | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 6.4 | Intense |
| 2 | 6.3 | Intense |
| 3 | 6.3 | Intense |
| 4 | 6.2 | Intense |
| 5 | 6.2 | Intense |
| 6 | 6.1 | Intense |
| 7 | 6.1 | Intense |
| 8 | 6.0 | Intense |
| 9 | 6.0 | Bright |
| 10 | 5.9 | Bright |
| 11 | 5.9 | Bright |
| 12 | 5.8 | Bright |
| 13 | 5.8 | Bright |
| 14 | 5.7 | Bright |
| 15 | 5.6 | Bright |
| 16 | 5.6 | Bright |
| 17 | 5.5 | Bright |
| 18 | 5.5 | Bright |
| 19 | 5.4 | Bright |
| 20 | 5.4 | Bright |
| 21 | 5.3 | Bright |
| 22 | 5.3 | Bright |
| 23 | 5.2 | Bright |
| 24 | 5.1 | Bright |
| 25 | 5.1 | Bright |
| 26 | 5.0 | Bright |
| 27 | 5.0 | Bright |
| 28 | 4.9 | Bright |
| 29 | 4.9 | Bright |
| 30 | 4.8 | Bright |
Hazard calendar for Chios
None of Chios's seasonal hazards are active in September. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.
Chios's rainy season runs November–March, when most of the year's rain falls.
Is September a good time to visit Chios?
Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
September 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 September
From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In September, Chios sees daytime highs around 25°C and nights near 21°C. Worth packing: light clothes, sun protection and a windbreaker.
Sea temperature near Chios in September
The nearest coast averages about 23°C in September — 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 September
Clear-sky midday UV in September peaks around 7 — enough to warrant sun protection. 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 September
Average fine-particle pollution (PM2.5) through the year — so you can see where September 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. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).