Thívai weather in September

In September, Thívai sees average daytime highs of 28°C and overnight lows near 17°C, with 23 mm of rain across 3.7 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 30°C in the first days to 26°C by the end. The sky is clear or mostly clear about 72% of the time in September, and the air most often feels comfortable.

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 Thívai's 4th-clearest and 7th-windiest month. For the whole year in context, see Thívai's year-round climate.

Daytime high
28°
4th warmest
Overnight low
17°
9th coldest
Rainfall
23 mm
3.7 wet days
Daylight
12 h 12 min
6:14 AM – 6:28 PM
Cloud cover
27%
4th clearest
Wind
8 km/h
7th windiest
Solar energy
5.13 kWh/m²
Travel score
7.4
out of 10

Thívai is modern city in Boeotia, Greece.

Density
39/km²
people per km²
Founded
~2000 BCE

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 30°C in the first days to 26°C by the end.

A typical September day in Thívai reaches about 28°C in the afternoon and slips back to 17°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 24°C and 32°C. Set against its neighbours, September runs about 4°C cooler than August and about 5°C warmer than October.

10°15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
13019
23019
33019
43019
53019
62918
72918
82918
92918
102918
112918
122918
132817
142817
152817
162817
172817
182817
192717
202717
212716
222716
232716
242716
252616
262616
272616
282616
292616
302615

How September really feels in Thívai

Once humidity and wind are folded in, September averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

September sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Thívai 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 daysSnow daysDaylight (hours)Travel score
Jan12° / 608.71.49.63.1
Feb13° / 568.31.510.53.6
Mar16° / 607.70.511.75.1
Apr20° / 336.20137.0
May25° / 14°2950147.9
Jun30° / 18°142.9014.66.2
Jul32° / 21°92014.45.1
Aug32° / 21°82.1013.55.4
Sep28° / 17°233.7012.37.4
Oct23° / 13°3350117.7
Nov17° / 506.809.95.9
Dec13° / 668.71.19.43.6

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 72% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 14% of September, with mostly cloudy or overcast conditions the remaining 15%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1946
2946
3946
4937
5937
6928
7919
8919
9919
108911
118911
128911
138812
148713
158614
168614
178515
188416
198317
208317
218119
228119
238119
247921
257921
267822
277723
287723
297525
307525

Chance of precipitation in September

Any precipitation

Thívai gets around 23 mm of rain over 3.7 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 12% and peaks near 14% on the wettest days.

0%10%20%30%151015202530
Rain chance (%)
19
210
310
411
511
611
711
811
912
1012
1112
1212
1312
1412
1512
1612
1712
1812
1912
2012
2112
2213
2313
2413
2513
2613
2713
2813
2913
3014

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

Most of September feels comfortable — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, September lands in the comfortable band about 41% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
12845261
22945251
33045251
43144241
53244231
63344231
73444221
83444211
93544211
103643201
113643201
123743191
133743191
143843181
153843181
163943171
174042171
184142161
194241161
204341161
214440151
224539151
234638151
244836151
254935151
265134141
275233141
285332141
295332141
305432131

Wind in September

Winds average 8 km/h in September.

Across September, daily wind ranges from about 8 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm

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 6:00 AM to 6:27 AM, and sunset from 6:53 PM to 6:06 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.96:006:53
212.86:016:51
312.86:026:49
412.76:036:48
512.76:046:46
612.76:056:45
712.66:066:43
812.66:076:41
912.56:076:40
1012.56:086:38
1112.56:096:37
1212.46:106:35
1312.46:116:33
1412.36:126:32
1512.36:136:30
1612.26:146:28
1712.26:156:27
1812.26:166:25
1912.16:166:23
2012.16:176:22
2112.06:186:20
2212.06:196:19
2311.96:206:17
2411.96:216:15
2511.96:226:14
2611.86:236:12
2711.86:246:10
2811.76:256:09
2911.76:266:07
3011.66:276:06

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.13 kWh/m².

For context, solar energy here swings from a low near 1.79 kWh/m² to a high of 7.41 kWh/m² in June across the year — September's 5.13 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
16.0Bright
25.9Bright
35.8Bright
45.8Bright
55.7Bright
65.7Bright
75.6Bright
85.6Bright
95.5Bright
105.5Bright
115.4Bright
125.3Bright
135.3Bright
145.2Bright
155.2Bright
165.1Bright
175.1Bright
185.0Bright
194.9Bright
204.9Bright
214.8Bright
224.8Bright
234.7Bright
244.7Bright
254.6Bright
264.5Bright
274.5Bright
284.4Bright
294.4Bright
304.3Bright
Planning a trip in September

Is September a good time to visit Thívai?

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

7.4
Sightseeing
3rd-best month of the year
8.3
Beach & pool
4th-best month of the year

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

What to pack for Thívai in September

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

In September, Thívai sees daytime highs around 28°C and nights near 17°C. Pack light clothes. Worth having: sun protection. About 4 days see rain.

light clothessun protection

Sea temperature near Thívai in September

The nearest coast averages about 25°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 45 km away) is warmest in August at about 26°C and coldest in February near 14°C.

It's comfortable for a long swim from Jun 2 to Nov 11 — about 5.4 months when the water holds above 20°C.

15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan15Cool
Feb14Bracing
Mar14Bracing
Apr15Cool
May18Cool
Jun22Refreshing
Jul25Warm
Aug26Warm
Sep25Warm
Oct22Refreshing
Nov20Cool
Dec17Cool

UV index in Thívai 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 Thívai peaks around June 22 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highVery highHighModerateJun 22UV 9Jan 1UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar5Moderate
Apr7Very high
May7High
Jun9Very high
Jul9Very high
Aug9Very high
Sep7High
Oct5Moderate
Nov3Moderate
Dec2Low

Air quality in Thívai 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 Thívai is worst in August — around 21 µg/m³ PM2.5 (moderate), about 2.5× the cleanest month (December, 8 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateModerateGoodAug 1221 µg/m³Dec 149 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb13Moderate
Mar15Moderate
Apr15Moderate
May14Moderate
Jun12Good
Jul18Moderate
Aug21Moderate
Sep11Good
Oct10Good
Nov10Good
Dec8Good
Location & terrain

Where is Thívai?

Thívai sits at 38.3°N, 23.3°E, 170 m above sea level, in Greece. The nearest listed city is Chalkída, 29 km away.

Áno LiósiaSalamína

Topography around Thívai

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

Within 3 km, the terrain around Thívai has significant variations in elevation — a maximum elevation change of 252 m around an average of 189 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,210 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,390 m.

The land around Thívai is covered by cropland (41%) and grassland (22%) within 3 km, cropland (43%) and trees (24%) within 16 km, and water (37%) and trees (32%) within 80 km.

3 km
252 m
16 km
1,210 m
80 km
2,390 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Chalkída 29 km · Mégara 37 km · Elefsína 37 km · Asprópyrgos 38 km · Fylí 39 km · Livadeiá 40 km · Áno Liósia 43 km · Salamína 43 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 Thívai (38.325°, 23.3189°, elevation 170 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).