Kyustendil weather in September

In September, Kyustendil sees average daytime highs of 23°C and overnight lows near 11°C, with 45 mm of rain across 7.5 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 25°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 Kyustendil's 3rd-clearest and 7th-windiest month. For the whole year in context, see Kyustendil's year-round climate.

Daytime high
23°
4th warmest
Overnight low
11°
9th coldest
Rainfall
45 mm
7.5 wet days
Daylight
12 h 18 min
6:15 AM – 6:32 PM
Cloud cover
44%
3rd clearest
Wind
5 km/h
7th windiest
Solar energy
4.45 kWh/m²
Travel score
7.4
out of 10

Kyustendil is city in Kyustendil municipality, Kyustendil oblast, Bulgaria.

Density
2,503/km²
people per km²
Founded
~1 CE

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 25°C in the first days to 20°C by the end.

A typical September day in Kyustendil reaches about 23°C in the afternoon and slips back to 11°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 17°C and 28°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)
12513
22512
32512
42412
52412
62412
72412
82411
92411
102311
112311
122311
132311
142311
152311
162310
172210
182210
192210
202210
212210
222110
232110
24219
25219
26219
27219
28209
29209
30209

How September really feels in Kyustendil

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.

Kyustendil 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 / -4°468.25.49.30.0
Feb / -3°4684.910.30.7
Mar11° / 6210.6411.62.6
Apr15° / 6811.91.313.14.5
May20° / 7213.40.114.45.9
Jun24° / 12°7212.20156.7
Jul27° / 14°568.9014.87.2
Aug27° / 14°457.6013.77.4
Sep23° / 11°457.5012.37.4
Oct17° / 567.40.510.85.8
Nov11° / 517.92.19.62.7
Dec / -2°599.14.790.2

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 34%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17822
27624
37624
47525
57426
67426
77327
87327
97327
107228
117129
127129
136931
146832
156832
166733
176535
186436
196436
206238
216139
225941
235941
245842
255743
265743
275644
285644
295644
305545

Chance of precipitation in September

Any precipitation

Kyustendil gets around 45 mm of rain over 7.5 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 25% and peaks near 26% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
126
226
326
426
525
625
725
824
924
1024
1123
1223
1323
1423
1523
1623
1723
1823
1924
2024
2124
2225
2325
2425
2525
2626
2726
2826
2926
3026

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 88% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
175241
277230
379210
480200
581190
682180
783170
884160
985150
1086140
1187130
1287130
1388120
1488120
1589110
1689110
1790100
1890100
1990100
209190
219190
229190
239280
249280
259370
269460
279460
289550
299550
309640

Wind in September

Winds average 5 km/h in September.

Across September, daily wind ranges from about 5 km/h on the calmest days to 5 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm

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 5:59 AM to 6:31 AM, and sunset from 6:59 PM to 6:06 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.05:596:59
213.06:006:57
312.96:016:56
412.96:026:54
512.86:036:52
612.86:046:50
712.76:056:48
812.76:066:47
912.66:086:45
1012.66:096:43
1112.56:106:41
1212.56:116:39
1312.46:126:37
1412.46:136:36
1512.36:146:34
1612.36:156:32
1712.26:166:30
1812.26:176:28
1912.16:186:26
2012.16:206:25
2112.06:216:23
2212.06:226:21
2311.96:236:19
2411.96:246:17
2511.86:256:15
2611.86:266:14
2711.76:276:12
2811.76:286:10
2911.66:306:08
3011.66:316:06

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 1.64 kWh/m² to a high of 6.44 kWh/m² in July across the year — September's 4.45 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.2Bright
25.1Bright
35.1Bright
45.0Bright
55.0Bright
64.9Bright
74.9Bright
84.8Bright
94.8Bright
104.7Bright
114.7Bright
124.7Bright
134.6Bright
144.6Bright
154.5Bright
164.5Bright
174.4Bright
184.3Bright
194.3Bright
204.3Bright
214.2Bright
224.1Bright
234.1Bright
244.0Bright
254.0Moderate
263.9Moderate
273.9Moderate
283.8Moderate
293.8Moderate
303.7Moderate
Planning a trip in September

Is September a good time to visit Kyustendil?

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

7.4
Sightseeing
1st-best month of the year
5.4
Beach & pool
4th-best month of the year

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

What to pack for Kyustendil in September

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

In September, Kyustendil sees daytime highs around 23°C and nights near 11°C. Worth packing: light clothes. About 8 days see rain.

light clothes

UV index in Kyustendil 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 Kyustendil peaks around July 11 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 highHighModerateLowJul 11UV 9Dec 21UV 1
UV index (midday)Level
Jan2Low
Feb2Moderate
Mar4Moderate
Apr8Very high
May7High
Jun9Very high
Jul9Very high
Aug9Very high
Sep6High
Oct4Moderate
Nov2Moderate
Dec1Low
Location & terrain

Where is Kyustendil?

Kyustendil sits at 42.3°N, 22.7°E, 514 m above sea level, in Bulgaria. The nearest listed city is Kriva Palanka, 31 km away.

Kriva PalankaDupnitsaDelcevoPernikBlagoevgradKochaniVinicaKratovo

Topography around Kyustendil

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

Within 3 km, the terrain around Kyustendil has significant variations in elevation — a maximum elevation change of 431 m around an average of 566 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,657 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,762 m.

The land around Kyustendil is covered by cropland (28%), trees (27%) and artificial surfaces (23%) within 3 km, trees (62%) and grassland (25%) within 16 km, and trees (60%) and grassland (26%) within 80 km.

3 km
431 m
16 km
1,657 m
80 km
2,762 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Kriva Palanka 31 km · Dupnitsa 35 km · Delcevo 36 km · Pernik 45 km · Blagoevgrad 45 km · Kochani 47 km · Vinica 47 km · Kratovo 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 Kyustendil (42.2831°, 22.6922°, elevation 514 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).