Chirpan weather in September

In September, Chirpan sees average daytime highs of 25°C and overnight lows near 14°C, with 44 mm of rain across 5.5 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 28°C in the first days to 23°C by the end. The sky is clear or mostly clear about 55% 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 Chirpan's 3rd-clearest and 7th-windiest month. For the whole year in context, see Chirpan's year-round climate.

Daytime high
25°
4th warmest
Overnight low
14°
9th coldest
Rainfall
44 mm
5.5 wet days
Daylight
12 h 18 min
6:05 AM – 6:21 PM
Cloud cover
40%
3rd clearest
Wind
7 km/h
7th windiest
Solar energy
4.45 kWh/m²
Travel score
7.8
out of 10

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

Density
207/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 28°C in the first days to 23°C by the end.

A typical September day in Chirpan reaches about 25°C in the afternoon and slips back to 14°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 20°C and 31°C. Set against its neighbours, September runs about 5°C cooler than August and about 7°C warmer than October.

10°20°30°151015202530
Avg high (°C)Avg low (°C)
12816
22816
32815
42715
52715
62715
72715
82715
92715
102614
112614
122614
132614
142614
152614
162514
172514
182513
192513
202513
212413
222413
232413
242413
252412
262312
272312
282312
292312
302212

How September really feels in Chirpan

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.

Chirpan 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
Jan / -3°436.73.39.30.2
Feb / -1°426.92.510.31.5
Mar13° / 568.61.911.63.6
Apr18° / 508.70.313.15.9
May23° / 12°6510.8014.46.8
Jun27° / 16°549.60156.5
Jul30° / 18°508014.85.7
Aug30° / 18°335.1013.75.9
Sep25° / 14°445.5012.37.8
Oct19° / 486.40.110.86.6
Nov12° / 466.10.99.63.5
Dec / -1°527.52.690.7

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 55% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 18% of September, with mostly cloudy or overcast conditions the remaining 27%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
18317
28218
38218
48119
58020
67921
77921
87822
97723
107723
117624
127624
137525
147426
157426
167327
177327
187228
197030
207030
216931
226832
236733
246634
256535
266436
276337
286238
296139
306139

Chance of precipitation in September

Any precipitation

Chirpan gets around 44 mm of rain over 5.5 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 18% and peaks near 20% on the wettest days.

0%10%20%30%151015202530
Rain chance (%)
117
217
317
417
517
617
717
817
917
1016
1116
1216
1316
1417
1517
1617
1718
1818
1918
2018
2119
2219
2319
2419
2519
2619
2720
2820
2920
3020

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 55% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
14037212
24236202
34436182
44536172
54736152
64836142
75036131
85037121
95137111
105237101
11533791
12533791
13533791
14553780
15553780
16563680
17573580
18573580
19583480
20593380
21603280
22603280
23613180
24623080
25642970
26642970
27662860
28662860
29682750
30682750

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 5:48 AM to 6:20 AM, and sunset from 6:48 PM to 5:56 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.05:486:48
213.05:496:47
312.95:516:45
412.95:526:43
512.85:536:41
612.85:546:40
712.75:556:38
812.75:566:36
912.65:576:34
1012.65:586:32
1112.55:596:31
1212.56:006:29
1312.46:016:27
1412.46:026:25
1512.36:036:23
1612.36:056:21
1712.26:066:20
1812.26:076:18
1912.16:086:16
2012.16:096:14
2112.06:106:12
2212.06:116:10
2311.96:126:09
2411.96:136:07
2511.86:146:05
2611.86:166:03
2711.76:176:01
2811.76:186:00
2911.66:195:58
3011.66:205:56

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 1.58 kWh/m² to a high of 6.45 kWh/m² in July 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
303.7Moderate
Planning a trip in September

Is September a good time to visit Chirpan?

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

7.8
Sightseeing
1st-best month of the year
7.1
Beach & pool
3rd-best month of the year

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

What to pack for Chirpan in September

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

In September, Chirpan sees daytime highs around 25°C and nights near 14°C. Worth packing: light clothes. About 6 days see rain.

light clothes

UV index in Chirpan 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 Chirpan peaks around July 14 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 14UV 9Dec 21UV 1
UV index (midday)Level
Jan1Low
Feb2Moderate
Mar3Moderate
Apr8Very high
May7High
Jun9Very high
Jul9Very high
Aug8Very high
Sep6High
Oct4Moderate
Nov2Moderate
Dec1Low

Air quality in Chirpan 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 Chirpan is worst in March — around 15 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

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

01020JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodMar 2015 µg/m³Sep 2210 µg/m³
PM2.5 (µg/m³)Level
Jan13Moderate
Feb13Moderate
Mar15Moderate
Apr14Moderate
May14Moderate
Jun14Moderate
Jul12Moderate
Aug12Good
Sep10Good
Oct10Good
Nov11Good
Dec10Good
Location & terrain

Where is Chirpan?

Chirpan sits at 42.2°N, 25.3°E, 195 m above sea level, in Bulgaria. The nearest listed city is Parvomay, 15 km away.

RakovskiHaskovoStara ZagoraAsenovgradKazanlakPlovdiv

Topography around Chirpan

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

Within 3 km, the terrain around Chirpan has only modest variations in elevation — a maximum elevation change of 134 m around an average of 188 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 546 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,335 m.

The land around Chirpan is covered by cropland (69%) within 3 km, cropland (67%) within 16 km, and trees (45%) and cropland (34%) within 80 km.

3 km
134 m
16 km
546 m
80 km
2,335 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Parvomay 15 km · Dimitrovgrad 28 km · Rakovski 32 km · Haskovo 35 km · Stara Zagora 36 km · Asenovgrad 44 km · Kazanlak 47 km · Plovdiv 48 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 Chirpan (42.2°, 25.3333°, elevation 195 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).