Mytilene weather in September

In September, Mytilene sees average daytime highs of 25°C and overnight lows near 21°C, with 21 mm of rain across 2.4 wet days and about 12.3 hours of daylight. It is the 4th-warmest and 9th-wettest month of the year here.

Highs ease over the month, from about 26°C in the first days to 23°C by the end. The sky is clear or mostly clear about 86% 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 Mytilene's 4th-clearest and 9th-windiest month. For the whole year in context, see Mytilene's year-round climate.

Daytime high
25°
4th warmest
Overnight low
21°
9th coldest
Rainfall
21 mm
2.4 wet days
Daylight
12 h 18 min
6:01 AM – 6:16 PM
Cloud cover
15%
4th clearest
Wind
17 km/h
9th windiest
Solar energy
5.49 kWh/m²
Travel score
8.9
out of 10

Mytilene is city on the Greek island of Lesbos.

Density
264/km²
people per km²

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 26°C in the first days to 23°C by the end.

A typical September day in Mytilene 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 22°C and 27°C. Set against its neighbours, September runs about 3°C cooler than August and about 4°C warmer than October.

15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12722
22722
32622
42622
52622
62621
72621
82621
92621
102621
112521
122521
132521
142521
152521
162520
172520
182520
192420
202420
212420
222420
232420
242420
252419
262419
272319
282319
292319
302319

Mytilene weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan12° / 12411.29.63.1
Feb12° / 10410.510.53.2
Mar14° / 10°748.511.74.4
Apr17° / 13°506.8136.1
May21° / 17°254.114.17.9
Jun26° / 21°81.714.78.9
Jul28° / 23°10.314.58.5
Aug28° / 23°10.313.58.4
Sep25° / 21°212.412.38.9
Oct21° / 17°635.6117.6
Nov17° / 13°1059.19.95.6
Dec13° / 10°13312.29.33.6

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 86% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 6% of September, with mostly cloudy or overcast conditions the remaining 7%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1982
2982
3982
4982
5982
6982
7964
8964
9964
10964
11964
12964
13955
14946
15946
16937
17937
18937
19919
20919
21919
228911
238911
248911
258911
268713
278713
288713
298713
308614

Chance of precipitation in September

Any precipitation

Mytilene gets around 21 mm of rain over 2.4 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 8% and peaks near 14% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%151015202530
Rain chance (%)
13
24
34
44
54
65
75
85
95
106
116
126
136
147
157
167
178
188
199
209
2110
2210
2311
2411
2512
2612
2713
2813
2913
3014

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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 26% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
151939343
262039323
372139313
472139303
582239292
682339282
792439272
892439262
9102538261
10102538251
11102638251
12102638251
13112638241
14112638241
15122637241
16122637241
17132636241
18132636241
19142635241
20152635231
21162634231
22172633230
23182633220
24192633220
25202632210
26212632210
27222632200
28222632200
29232632190
30242731180

Wind in September

Winds average 17 km/h in September.

Across September, daily wind ranges from about 17 km/h on the calmest days to 18 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202530
Wind speed (km/h)Feels
118light breeze
218light breeze
318light breeze
418light breeze
518light breeze
618light breeze
718light breeze
818light breeze
918light breeze
1017light breeze
1117light breeze
1217light breeze
1317light breeze
1417light breeze
1517light breeze
1617light breeze
1717light breeze
1817light breeze
1917light breeze
2017light breeze
2117light breeze
2217light breeze
2317light breeze
2417light breeze
2517light breeze
2617light breeze
2717light breeze
2817light breeze
2917light breeze
3017light breeze

Sunrise & sunset in September

DaylightNight

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 5:47 AM to 6:14 AM, and sunset from 6:40 PM to 5:52 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.95:476:40
212.95:486:39
312.85:486:37
412.85:496:36
512.75:506:34
612.75:516:32
712.65:526:31
812.65:536:29
912.65:546:27
1012.55:556:26
1112.55:566:24
1212.45:576:22
1312.45:586:21
1412.35:596:19
1512.36:006:17
1612.36:016:16
1712.26:026:14
1812.26:026:12
1912.16:036:11
2012.16:046:09
2112.06:056:07
2212.06:066:06
2311.96:076:04
2411.96:086:02
2511.96:096:01
2611.86:105:59
2711.86:115:57
2811.76:125:56
2911.76:135:54
3011.66:145:52

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.49 kWh/m².

For context, solar energy here swings from a low near 1.93 kWh/m² to a high of 7.74 kWh/m² in June across the year — September's 5.49 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
16.3Intense
26.2Intense
36.2Intense
46.1Intense
56.1Intense
66.0Intense
76.0Bright
85.9Bright
95.9Bright
105.8Bright
115.8Bright
125.7Bright
135.6Bright
145.6Bright
155.5Bright
165.5Bright
175.4Bright
185.4Bright
195.3Bright
205.3Bright
215.2Bright
225.1Bright
235.1Bright
245.0Bright
255.0Bright
264.9Bright
274.9Bright
284.8Bright
294.8Bright
304.7Bright
Planning a trip in September

Hazard calendar for Mytilene

In seasonPeak

None of Mytilene's seasonal hazards are active in September. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Mytilene's rainy season runs October–March, when most of the year's rain falls.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is September a good time to visit Mytilene?

Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

8.9
Sightseeing
1st-best month of the year
7.9
Beach & pool
4th-best month of the year

September is one of the better times to visit Mytilene for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Mytilene in September

From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In September, Mytilene sees daytime highs around 25°C and nights near 21°C. Worth packing: light clothes and sun protection.

light clothessun protection

Sea temperature near Mytilene in September

The nearest coast averages about 22°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 24°C and coldest in February near 15°C.

It's comfortable for a long swim from May 31 to Oct 23 — about 4.8 months when the water holds above 20°C.

15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan15Cool
Feb15Bracing
Mar15Cool
Apr16Cool
May19Cool
Jun22Refreshing
Jul23Refreshing
Aug24Refreshing
Sep22Refreshing
Oct21Refreshing
Nov18Cool
Dec17Cool

UV index in Mytilene in September

LowModerateHighVery highExtreme

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 Mytilene peaks around August 10 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateVery highHighModerateLowAug 10UV 9Dec 22UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar4Moderate
Apr8Very high
May7Very high
Jun9Very high
Jul9Very high
Aug9Very high
Sep7High
Oct4Moderate
Nov3Moderate
Dec2Low

Air quality in Mytilene in September

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.

Air quality in Mytilene is worst in March — around 16 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (December, 8 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodMar 1915 µg/m³Dec 188 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb12Good
Mar16Moderate
Apr14Moderate
May13Moderate
Jun13Moderate
Jul11Good
Aug11Good
Sep10Good
Oct9Good
Nov11Good
Dec8Good
Location & terrain

Where is Mytilene?

Mytilene sits at 39.1°N, 26.6°E, 14 m above sea level, in Greece. The nearest listed city is Ayvalık, 26 km away.

AliağaFoçaBergamaBurhaniyeEdremitMenemenEzine

Topography around Mytilene

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Mytilene.

Within 3 km, the terrain around Mytilene has significant variations in elevation — a maximum elevation change of 375 m around an average of 54 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 869 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,761 m.

The land around Mytilene is covered by water (45%) and trees (25%) within 3 km, water (60%) and trees (29%) within 16 km, and water (48%) and trees (28%) within 80 km.

3 km
375 m
16 km
869 m
80 km
1,761 m
treesshrubsgrasslandcroplandartificial surfaceswater
September weather nearby: Ayvalık 26 km · Aliağa 50 km · Foça 52 km · Bergama 54 km · Burhaniye 57 km · Edremit 68 km · Menemen 71 km · Ezine 78 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
other 3%Muslim 2%

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 Mytilene (39.1077°, 26.5553°, elevation 14 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).