Stara Zagora weather in September

In September, Stara Zagora sees average daytime highs of 24°C and overnight lows near 13°C, with 47 mm of rain across 6.9 wet days and about 12.3 hours of daylight. It is the 4th-warmest and 10th-wettest month of the year here.

Highs ease over the month, from about 26°C in the first days to 22°C by the end. The sky is clear or mostly clear about 52% of the time in September, and the air most often feels dry.

Daylight stretches from about 13 hours at the start of September to 11 h 36 min by month's end. Set against the rest of the year, September is Stara Zagora's 3rd-clearest and 4th-windiest month. For the whole year in context, see Stara Zagora's year-round climate.

Daytime high
24°
4th warmest
Overnight low
13°
9th coldest
Rainfall
47 mm
6.9 wet days
Daylight
12 h 18 min
6:03 AM – 6:20 PM
Cloud cover
42%
3rd clearest
Wind
7 km/h
4th windiest
Solar energy
4.45 kWh/m²
Travel score
7.6
out of 10

Stara Zagora is city in Stara Zagora municipality, Stara Zagora oblast, Bulgaria.

Air quality
Elevated
PM2.5 20.9 µg/m³ · 2019
Density
1,417/km²
people per km²
Founded
~342 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 26°C in the first days to 22°C by the end.

A typical September day in Stara Zagora reaches about 24°C in the afternoon and slips back to 13°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 19°C and 29°C. Set against its neighbours, September runs about 5°C cooler than August and about 6°C warmer than October.

10°20°30°151015202530
Avg high (°C)Avg low (°C)
12715
22715
32615
42615
52615
62615
72615
82514
92514
102514
112514
122514
132514
142414
152414
162413
172413
182413
192313
202313
212313
222313
232312
242212
252212
262212
272212
282212
292112
302111

How September really feels in Stara Zagora

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.

Stara Zagora weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -2°497.849.20.0
Feb / -1°477.43.210.31.0
Mar11° / 609.52.911.62.9
Apr16° / 60110.613.15.0
May22° / 11°8113.4014.46.1
Jun26° / 15°6812.50156.5
Jul28° / 17°599.5014.86.3
Aug29° / 17°416.7013.76.6
Sep24° / 13°476.9012.37.6
Oct18° / 5770.310.86.1
Nov11° / 5471.49.63.0
Dec / -1°608.43.28.90.4

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 52% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 19% of September, with mostly cloudy or overcast conditions the remaining 29%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
18218
28020
38020
47822
57822
67822
77723
87624
97624
107525
117525
127426
137327
147327
157228
167129
177129
187030
196931
206832
216733
226634
236535
246436
256337
266238
276238
286040
296040
305941

Chance of precipitation in September

Any precipitation

Stara Zagora gets around 47 mm of rain over 6.9 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 22% and peaks near 24% on the wettest days.

0%10%20%30%151015202530
Rain chance (%)
124
224
324
424
524
624
723
823
922
1022
1121
1221
1321
1420
1520
1621
1721
1821
1921
2022
2122
2222
2322
2423
2523
2623
2723
2823
2924
3024

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the dry band about 58% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
14136221
24435201
34634181
44834171
55034151
65134141
75334121
85335111
95435101
10553591
11553681
12573670
13573670
14573670
15583570
16593560
17603460
18613360
19613360
20623260
21633160
22633160
23643060
24652960
25652960
26672850
27682750
28692740
29702640
30702640

Wind in September

Winds average 7 km/h in September.

Across September, daily wind ranges from about 7 km/h on the calmest days to 7 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 hours 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 84 minutes over September. Sunrise moves from 5:47 AM to 6:19 AM, and sunset from 6:47 PM to 5:55 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.05:476:47
213.05:486:46
312.95:496:44
412.95:506:42
512.85:516:40
612.85:526:39
712.75:536:37
812.75:556:35
912.65:566:33
1012.65:576:31
1112.55:586:29
1212.55:596:28
1312.46:006:26
1412.46:016:24
1512.36:026:22
1612.36:036:20
1712.26:046:18
1812.26:056:17
1912.16:076:15
2012.16:086:13
2112.06:096:11
2212.06:106:09
2311.96:116:07
2411.96:126:05
2511.86:136:04
2611.86:146:02
2711.76:156:00
2811.76:175:58
2911.66:185:56
3011.66:195:55

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.45 kWh/m².

For context, solar energy here swings from a low near 1.49 kWh/m² to a high of 6.49 kWh/m² in June across the year — September's 4.45 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.3Bright
25.2Bright
35.1Bright
45.1Bright
55.0Bright
65.0Bright
74.9Bright
84.9Bright
94.8Bright
104.8Bright
114.7Bright
124.7Bright
134.6Bright
144.5Bright
154.5Bright
164.4Bright
174.4Bright
184.3Bright
194.3Bright
204.2Bright
214.2Bright
224.1Bright
234.0Bright
244.0Moderate
253.9Moderate
263.9Moderate
273.8Moderate
283.8Moderate
293.7Moderate
303.6Moderate
Planning a trip in September

Is September a good time to visit Stara Zagora?

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

7.6
Sightseeing
1st-best month of the year
6.3
Beach & pool
3rd-best month of the year

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

What to pack for Stara Zagora in September

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

In September, Stara Zagora sees daytime highs around 24°C and nights near 13°C. Worth packing: light clothes. About 7 days see rain.

light clothes

UV index in Stara Zagora in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Stara Zagora peaks around July 15 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 at about 1 (low).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateVery highVery highHighModerateLowJul 15UV 9Dec 21UV 1
UV index (midday)Level
Jan1Low
Feb2Moderate
Mar3Moderate
Apr8Very high
May7High
Jun8Very high
Jul9Very high
Aug8Very high
Sep6High
Oct4Moderate
Nov2Moderate
Dec1Low

Air quality in Stara Zagora 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 Stara Zagora is worst in March — around 27 µg/m³ PM2.5 (moderate), about 1.6× the cleanest month (December, 16 µg/m³).

Seasonal pattern from CAMS reanalysis, scaled to Stara Zagora's WHO annual average of 20.9 µg/m³.

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateMar 2026 µg/m³Dec 1217 µg/m³
PM2.5 (µg/m³)Level
Jan22Moderate
Feb22Moderate
Mar27Moderate
Apr25Moderate
May23Moderate
Jun23Moderate
Jul21Moderate
Aug20Moderate
Sep17Moderate
Oct17Moderate
Nov18Moderate
Dec16Moderate
Location & terrain

Where is Stara Zagora?

Stara Zagora sits at 42.4°N, 25.6°E, 205 m above sea level, in Bulgaria. The nearest listed city is Kazanlak, 29 km away.

KazanlakNova ZagoraChirpanDimitrovgradParvomayHaskovoGabrovoRakovski

Topography around Stara Zagora

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

Within 3 km, the terrain around Stara Zagora has significant variations in elevation — a maximum elevation change of 282 m around an average of 235 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 776 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,335 m.

The land around Stara Zagora is covered by artificial surfaces (36%) and trees (34%) within 3 km, trees (42%) and cropland (37%) within 16 km, and trees (42%) and cropland (38%) within 80 km.

3 km
282 m
16 km
776 m
80 km
2,335 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Kazanlak 29 km · Nova Zagora 31 km · Chirpan 36 km · Dimitrovgrad 43 km · Parvomay 51 km · Haskovo 56 km · Gabrovo 56 km · Rakovski 58 km

Bulgaria travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type C / F
230 V · 50 Hz
Prices
≈ 23% of US
price level, 2025
GDP per capita
$20,328
2025
Happiness
5.7 / 10
World Happiness, 2025
Safe drinking water
96%
of population, 2024
Homicide rate
1.1
per 100k, 2023
Road deaths
9.2
per 100k/yr, 2019
Income group
High
World Bank
English
High
EF EPI 594
Religion
Christian 65%Muslim 10%none 5%other 0%

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 Stara Zagora (42.432°, 25.6426°, elevation 205 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. 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).