Troyan weather in September

In September, Troyan sees average daytime highs of 22°C and overnight lows near 12°C, with 73 mm of rain across 8.9 wet days and about 12.3 hours of daylight. It is the 4th-warmest and 6th-wettest month of the year here.

Highs ease over the month, from about 24°C in the first days to 20°C by the end. The sky is clear or mostly clear about 49% 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 Troyan's 3rd-clearest and 8th-windiest month. For the whole year in context, see Troyan's year-round climate.

Daytime high
22°
4th warmest
Overnight low
12°
9th coldest
Rainfall
73 mm
8.9 wet days
Daylight
12 h 18 min
6:07 AM – 6:24 PM
Cloud cover
45%
3rd clearest
Wind
6 km/h
8th windiest
Solar energy
4.3 kWh/m²
Travel score
7.1
out of 10

Troyan is city in Troyan municipality, Lovech oblast, Bulgaria.

Density
351/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 24°C in the first days to 20°C by the end.

A typical September day in Troyan reaches about 22°C in the afternoon and slips back to 12°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 16°C and 28°C. Set against its neighbours, September runs about 4°C cooler than August and about 6°C warmer than October.

10°15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12514
22413
32413
42413
52413
62413
72413
82313
92312
102312
112312
122312
132312
142312
152212
162212
172212
182211
192211
202111
212111
222111
232111
242111
252110
262010
272010
282010
292010
302010

How September really feels in Troyan

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.

Troyan weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -4°538.66.59.20.0
Feb / -2°538.7610.20.4
Mar10° / 75125.111.62.2
Apr16° / 9013.11.213.14.4
May20° / 10°12215014.45.7
Jun24° / 14°10914.2015.16.3
Jul26° / 16°10411.5014.86.8
Aug27° / 15°668.4013.87.3
Sep22° / 12°738.9012.37.1
Oct16° / 618.50.710.85.4
Nov10° / 507.82.39.52.4
Dec / -2°609.768.90.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 49% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 17% of September, with mostly cloudy or overcast conditions the remaining 35%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17723
27624
37426
47426
57327
67228
77228
87030
97030
106931
116931
126832
136832
146634
156634
166535
176436
186436
196337
206238
216139
226139
236040
245941
255941
265842
275842
285743
295644
305545

Chance of precipitation in September

Any precipitation

Troyan gets around 73 mm of rain over 8.9 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 29% and peaks near 31% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
129
229
329
428
528
628
727
827
927
1027
1127
1227
1327
1427
1528
1628
1729
1829
1930
2031
2131
2231
2331
2431
2531
2631
2730
2830
2930
3030

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 65% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
14736171
24935150
35234140
45434120
55633110
65733100
7583390
8593380
9603370
10613360
11613360
12623350
13633250
14633250
15643240
16653140
17653140
18663040
19672940
20672940
21692830
22702730
23712630
24722530
25732430
26742330
27762220
28782020
29791920
30801820

Wind in September

Winds average 6 km/h in September.

Across September, daily wind ranges from about 6 km/h on the calmest days to 6 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm

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 5:50 AM to 6:23 AM, and sunset from 6:52 PM to 5:58 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.05:506:52
213.05:516:50
312.95:526:48
412.95:536:46
512.85:556:44
612.85:566:43
712.75:576:41
812.75:586:39
912.65:596:37
1012.66:006:35
1112.56:016:33
1212.56:026:32
1312.46:036:30
1412.46:056:28
1512.36:066:26
1612.36:076:24
1712.26:086:22
1812.26:096:20
1912.16:106:18
2012.16:116:17
2112.06:126:15
2212.06:146:13
2311.96:156:11
2411.96:166:09
2511.86:176:07
2611.86:186:05
2711.76:196:04
2811.76:206:02
2911.66:226:00
3011.66:235:58

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.3 kWh/m².

For context, solar energy here swings from a low near 1.45 kWh/m² to a high of 6.34 kWh/m² in June across the year — September's 4.3 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.1Bright
25.1Bright
35.0Bright
45.0Bright
54.9Bright
64.8Bright
74.8Bright
84.7Bright
94.7Bright
104.6Bright
114.6Bright
124.5Bright
134.5Bright
144.4Bright
154.3Bright
164.3Bright
174.2Bright
184.2Bright
194.1Bright
204.0Bright
214.0Moderate
223.9Moderate
233.9Moderate
243.8Moderate
253.8Moderate
263.7Moderate
273.7Moderate
283.6Moderate
293.6Moderate
303.5Moderate
Planning a trip in September

Is September a good time to visit Troyan?

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

7.1
Sightseeing
2nd-best month of the year
5.0
Beach & pool
4th-best month of the year

September is one of the better times to visit Troyan for general sightseeing.

What to pack for Troyan in September

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

In September, Troyan sees daytime highs around 22°C and nights near 12°C. Worth packing: light clothes and rain gear. About 9 days see rain.

light clothesrain gear

UV index in Troyan 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 Troyan 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
Jun9Very high
Jul9Very high
Aug9Very high
Sep6High
Oct4Moderate
Nov2Low
Dec1Low

Air quality in Troyan 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 Troyan is worst in March — around 16 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

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

01020JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodMar 2016 µg/m³Dec 1411 µg/m³
PM2.5 (µg/m³)Level
Jan13Moderate
Feb13Moderate
Mar16Moderate
Apr15Moderate
May14Moderate
Jun14Moderate
Jul14Moderate
Aug13Moderate
Sep12Good
Oct11Good
Nov12Good
Dec10Good
Location & terrain

Where is Troyan?

Troyan sits at 42.9°N, 24.7°E, 389 m above sea level, in Bulgaria. The nearest listed city is Lovech, 26 km away.

KarlovoSevlievoGabrovoPlevenPanagyurishteKazanlakRakovski

Topography around Troyan

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

Within 3 km, the terrain around Troyan has significant variations in elevation — a maximum elevation change of 353 m around an average of 474 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,460 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,343 m.

The land around Troyan is covered by trees (73%) within 3 km, trees (83%) within 16 km, and trees (51%) and cropland (32%) within 80 km.

3 km
353 m
16 km
1,460 m
80 km
2,343 m
treesgrasslandcroplandartificial surfaces
September weather nearby: Lovech 26 km · Karlovo 30 km · Sevlievo 35 km · Gabrovo 49 km · Pleven 59 km · Panagyurishte 62 km · Kazanlak 64 km · Rakovski 70 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 Troyan (42.8943°, 24.7159°, elevation 389 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).