Harmanli weather in September

In September, Harmanli sees average daytime highs of 26°C and overnight lows near 14°C, with 41 mm of rain across 5.6 wet days and about 12.3 hours of daylight. It is the 4th-warmest and 11th-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 56% 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 Harmanli's 3rd-clearest and 5th-windiest month. For the whole year in context, see Harmanli's year-round climate.

Daytime high
26°
4th warmest
Overnight low
14°
9th coldest
Rainfall
41 mm
5.6 wet days
Daylight
12 h 18 min
6:02 AM – 6:19 PM
Cloud cover
38%
3rd clearest
Wind
9 km/h
5th windiest
Solar energy
4.53 kWh/m²
Travel score
7.7
out of 10

Harmanli is city in Harmanli municipality, Haskovo oblast, Bulgaria.

Density
368/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 Harmanli reaches about 26°C in the afternoon and slips back to 14°C overnight — a 11°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)
12917
22816
32816
42816
52816
62816
72716
82715
92715
102715
112715
122715
132615
142615
152614
162614
172614
182514
192514
202514
212514
222514
232413
242413
252413
262413
272413
282313
292313
302312

How September really feels in Harmanli

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.

Harmanli weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -1°517.33.19.30.4
Feb / 497.32.410.31.6
Mar12° / 608.81.911.73.5
Apr18° / 548.90.313.15.8
May23° / 12°6711.3014.36.7
Jun27° / 16°559.40156.5
Jul30° / 18°506.6014.75.6
Aug31° / 18°284.4013.75.7
Sep26° / 14°415.6012.37.7
Oct19° / 10°606.40.110.96.7
Nov13° / 546.50.89.63.8
Dec / 627.82.591.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 56% 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 26%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
18416
28317
38218
48218
58020
68020
77921
87921
97822
107822
117723
127822
137723
147624
157624
167525
177525
187426
197228
207228
217129
227030
236931
246832
256733
266634
276535
286436
296337
306337

Chance of precipitation in September

Any precipitation

Harmanli gets around 41 mm of rain over 5.6 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 21% on the wettest days.

0%10%20%30%151015202530
Rain chance (%)
116
216
317
417
517
617
717
817
917
1017
1116
1216
1316
1416
1516
1617
1717
1817
1918
2018
2118
2219
2319
2420
2520
2620
2720
2821
2921
3021

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 57% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
14236211
24435191
34635181
44835171
54934151
65134141
75135131
85235121
95236111
105336101
11543691
12543781
13563680
14563680
15563680
16573580
17583480
18593380
19603280
20603190
21613090
22622990
23632890
24632890
25652780
26652780
27662680
28672670
29672670
30682660

Wind in September

Winds average 9 km/h in September.

Across September, daily wind ranges from about 9 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
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm

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 5:46 AM to 6:18 AM, and sunset from 6:46 PM to 5:54 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.05:466:46
212.95:476:44
312.95:496:42
412.95:506:41
512.85:516:39
612.85:526:37
712.75:536:35
812.75:546:34
912.65:556:32
1012.65:566:30
1112.55:576:28
1212.55:586:26
1312.45:596:24
1412.46:006:23
1512.36:016:21
1612.36:026:19
1712.26:036:17
1812.26:056:15
1912.16:066:14
2012.16:076:12
2112.06:086:10
2212.06:096:08
2311.96:106:06
2411.96:116:05
2511.86:126:03
2611.86:136:01
2711.76:145:59
2811.76:155:57
2911.76:175:56
3011.66:185:54

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.53 kWh/m².

For context, solar energy here swings from a low near 1.52 kWh/m² to a high of 6.62 kWh/m² in June across the year — September's 4.53 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.3Bright
25.3Bright
35.2Bright
45.2Bright
55.1Bright
65.1Bright
75.0Bright
85.0Bright
94.9Bright
104.8Bright
114.8Bright
124.7Bright
134.7Bright
144.6Bright
154.6Bright
164.5Bright
174.5Bright
184.4Bright
194.3Bright
204.3Bright
214.2Bright
224.2Bright
234.1Bright
244.0Bright
254.0Bright
263.9Moderate
273.9Moderate
283.8Moderate
293.8Moderate
303.7Moderate
Planning a trip in September

Is September a good time to visit Harmanli?

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

7.7
Sightseeing
1st-best month of the year
7.2
Beach & pool
3rd-best month of the year

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

What to pack for Harmanli in September

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

In September, Harmanli sees daytime highs around 26°C and nights near 14°C. Worth packing: light clothes and sun protection. About 6 days see rain.

light clothessun protection

UV index in Harmanli 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 Harmanli peaks around July 17 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 23 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 17UV 9Dec 23UV 1
UV index (midday)Level
Jan1Low
Feb2Moderate
Mar4Moderate
Apr8Very high
May7High
Jun8Very high
Jul9Very high
Aug8Very high
Sep6High
Oct4Moderate
Nov2Moderate
Dec1Low

Air quality in Harmanli 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 Harmanli is worst in March — around 16 µg/m³ PM2.5 (moderate), about 1.6× the cleanest month (September, 10 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodMar 1916 µg/m³Sep 1810 µg/m³
PM2.5 (µg/m³)Level
Jan14Moderate
Feb14Moderate
Mar16Moderate
Apr15Moderate
May14Moderate
Jun13Moderate
Jul12Good
Aug11Good
Sep10Good
Oct11Good
Nov11Good
Dec11Good
Location & terrain

Where is Harmanli?

Harmanli sits at 41.9°N, 25.9°E, 61 m above sea level, in Bulgaria. The nearest listed city is Dimitrovgrad, 28 km away.

SvilengradKardzhaliChirpanStara ZagoraParvomayEdirne

Topography around Harmanli

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

Within 3 km, the terrain around Harmanli has only modest variations in elevation — a maximum elevation change of 178 m around an average of 114 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 361 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,691 m.

The land around Harmanli is covered by trees (29%), grassland (29%) and cropland (27%) within 3 km, cropland (34%), grassland (32%) and trees (31%) within 16 km, and cropland (42%), trees (35%) and grassland (20%) within 80 km.

3 km
178 m
16 km
361 m
80 km
1,691 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Dimitrovgrad 28 km · Haskovo 29 km · Svilengrad 31 km · Kardzhali 55 km · Chirpan 56 km · Stara Zagora 60 km · Parvomay 60 km · Edirne 61 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 Harmanli (41.9323°, 25.9017°, elevation 61 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).