Petrich weather in September

In September, Petrich sees average daytime highs of 24°C and overnight lows near 13°C, with 40 mm of rain across 7 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 26°C in the first days to 21°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 Petrich's 3rd-clearest and 9th-windiest month. For the whole year in context, see Petrich's year-round climate.

Daytime high
24°
4th warmest
Overnight low
13°
9th coldest
Rainfall
40 mm
7 wet days
Daylight
12 h 18 min
6:13 AM – 6:30 PM
Cloud cover
39%
3rd clearest
Wind
5 km/h
9th windiest
Solar energy
4.58 kWh/m²
Travel score
7.7
out of 10

Petrich is city in Petrich municipality, Blagoevgrad oblast, Bulgaria.

Density
382/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 26°C in the first days to 21°C by the end.

A typical September day in Petrich 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 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)
12615
22614
32614
42614
52514
62514
72514
82514
92513
102513
112413
122413
132413
142413
152413
162413
172312
182312
192312
202312
212312
222312
232212
242211
252211
262211
272211
282111
292111
302111

How September really feels in Petrich

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.

Petrich 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 / -2°588.14.29.40.4
Feb / -1°599.24.210.31.3
Mar12° / 7410.82.911.73.1
Apr16° / 6911.90.513.14.9
May21° / 10°7812.50.114.36.2
Jun26° / 14°5310.6014.96.9
Jul28° / 16°407.8014.76.8
Aug28° / 16°336.8013.76.8
Sep24° / 13°407012.37.7
Oct18° / 637.40.210.96.3
Nov12° / 6881.19.73.3
Dec / -1°789.53.19.10.8

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 (%)
18515
28416
38317
48218
58218
68119
78020
88020
97921
107822
117723
127723
137624
147525
157426
167426
177228
187228
197030
207030
216931
226931
236832
246832
256733
266733
276733
286634
296634
306634

Chance of precipitation in September

Any precipitation

Petrich gets around 40 mm of rain over 7 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 23% and peaks near 25% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
121
221
321
421
521
621
721
821
921
1021
1121
1221
1321
1421
1522
1622
1723
1823
1924
2024
2125
2225
2325
2425
2525
2625
2724
2824
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 75% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
159383
260373
363352
465332
566322
669301
770291
871281
972271
1073261
1174251
1274251
1375241
1475241
1576240
1676240
1777230
1877230
1977230
2078220
2179210
2279210
2380200
2481190
2583170
2684160
2785150
2886140
2987130
3089110

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 5:58 AM to 6:28 AM, and sunset from 6:56 PM to 6:05 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.05:586:56
212.95:596:54
312.96:006:53
412.86:016:51
512.86:026:49
612.76:036:47
712.76:046:46
812.66:056:44
912.66:066:42
1012.66:076:40
1112.56:086:39
1212.56:096:37
1312.46:106:35
1412.46:116:33
1512.36:126:31
1612.36:136:30
1712.26:146:28
1812.26:156:26
1912.16:166:24
2012.16:186:22
2112.06:196:21
2212.06:206:19
2311.96:216:17
2411.96:226:15
2511.86:236:14
2611.86:246:12
2711.86:256:10
2811.76:266:08
2911.76:276:07
3011.66:286:05

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.58 kWh/m².

For context, solar energy here swings from a low near 1.67 kWh/m² to a high of 6.59 kWh/m² in June across the year — September's 4.58 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.3Bright
25.2Bright
35.2Bright
45.1Bright
55.1Bright
65.0Bright
75.0Bright
85.0Bright
94.9Bright
104.8Bright
114.8Bright
124.8Bright
134.7Bright
144.7Bright
154.6Bright
164.6Bright
174.5Bright
184.5Bright
194.4Bright
204.4Bright
214.3Bright
224.3Bright
234.2Bright
244.2Bright
254.1Bright
264.1Bright
274.0Bright
284.0Moderate
293.9Moderate
303.9Moderate
Planning a trip in September

Is September a good time to visit Petrich?

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
6.2
Beach & pool
4th-best month of the year

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

What to pack for Petrich in September

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

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

light clothessun protection

UV index in Petrich 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 Petrich peaks around June 22 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJun 22UV 9Dec 21UV 1
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar4Moderate
Apr8Very high
May6High
Jun9Very high
Jul9Very high
Aug9Very high
Sep6High
Oct4Moderate
Nov2Moderate
Dec1Low

Air quality in Petrich 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 Petrich is worst in March — around 15 µg/m³ PM2.5 (moderate), about 1.6× the cleanest month (December, 9 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodMar 2215 µg/m³Dec 1410 µg/m³
PM2.5 (µg/m³)Level
Jan12Good
Feb13Moderate
Mar15Moderate
Apr15Moderate
May14Moderate
Jun14Moderate
Jul12Moderate
Aug13Moderate
Sep11Good
Oct10Good
Nov11Good
Dec9Good
Location & terrain

Where is Petrich?

Petrich sits at 41.4°N, 23.2°E, 185 m above sea level, in Bulgaria. The nearest listed city is Sandanski, 20 km away.

SérresStrumicaGotse DelchevKilkísBanskoGevgelijaRadovis

Topography around Petrich

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

Within 3 km, the terrain around Petrich has large variations in elevation — a maximum elevation change of 684 m around an average of 234 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,986 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,873 m.

The land around Petrich is covered by trees (40%) and cropland (31%) within 3 km, trees (58%) and grassland (25%) within 16 km, and trees (57%) and cropland (20%) within 80 km.

3 km
684 m
16 km
1,986 m
80 km
2,873 m
treesshrubsgrasslandcroplandartificial surfaceswater
September weather nearby: Sandanski 20 km · Sérres 45 km · Strumica 47 km · Gotse Delchev 48 km · Kilkís 53 km · Bansko 54 km · Gevgelija 65 km · Radovis 67 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 Petrich (41.3985°, 23.207°, elevation 185 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).