Montenegro weather in September

In September, Montenegro sees average daytime highs of 22°C and overnight lows near 13°C, with 161 mm of rain across 11.8 wet days and about 11.8 hours of daylight. It is the 8th-warmest and 3rd-wettest month of the year here.

Day-to-day highs hold fairly steady near 22°C through the month. The sky is clear or mostly clear about 30% of the time in September, and the air most often feels dry.

Daylight stretches from about 11 h 24 min at the start of September to 12 h 18 min by month's end. Set against the rest of the year, September is Montenegro's 11th-clearest and 1st-windiest month. For the whole year in context, see Montenegro's year-round climate.

Daytime high
22°
8th warmest
Overnight low
13°
4th coldest
Rainfall
161 mm
11.8 wet days
Daylight
11 h 48 min
7:25 AM – 7:15 PM
Cloud cover
63%
11th clearest
Wind
10 km/h
1st windiest
Solar energy
4.05 kWh/m²
Travel score
6.3
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 22°C through the month.

A typical September day in Montenegro reaches about 22°C in the afternoon and slips back to 13°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 17°C and 29°C. Set against its neighbours, September runs about 1°C warmer than August and about 2°C cooler than October.

10°15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12212
22212
32212
42212
52212
62213
72213
82213
92213
102213
112213
122213
132213
142213
152213
162213
172213
182213
192213
202213
212213
222213
232213
242213
252213
262213
272313
282313
292314
302314

Montenegro weather by month

How September compares with the rest of the year at a glance. September is the 8th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 20°16415.313.74.6
Feb29° / 20°14113.913.14.7
Mar28° / 19°1261312.25.7
Apr25° / 16°1219.811.36.8
May22° / 13°1219.510.56.6
Jun20° / 11°12910.110.16.1
Jul19° / 10°16010.410.36.1
Aug21° / 11°13110.510.96.5
Sep22° / 13°16111.811.86.3
Oct24° / 15°19213.512.76.2
Nov27° / 17°14011.713.56.3
Dec29° / 19°14313.213.95.2

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 30% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 11% of September, with mostly cloudy or overcast conditions the remaining 59%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14753
24654
34654
44456
54357
64357
74159
84159
94060
104159
114060
124159
134060
144060
153961
164060
174060
184060
194060
204060
214060
224060
234159
244060
254060
263961
273862
283862
293664
303763

Chance of precipitation in September

Any precipitation

Montenegro gets around 161 mm of rain over 11.8 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 40% and peaks near 42% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
134
235
335
436
536
637
737
838
938
1039
1139
1239
1340
1441
1541
1641
1742
1842
1942
2041
2141
2241
2341
2442
2542
2642
2742
2842
2942
3042

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 41% of days. Sticky, muggy-or-worse air turns up on roughly 5% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
14527243
24527244
34427244
44427244
54428254
64428254
74328254
84328254
94328254
104228254
114229264
124129264
134129264
144128274
154028274
164028275
174028275
184028275
194027275
204027276
214027266
224027266
233927277
243927277
253827278
263827278
273727278
283727279
2936272710
3035272710

Wind in September

Winds average 10 km/h in September, the windiest month of the year.

Across September, daily wind ranges from about 10 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 24 min at the start of September to 12 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 54 minutes over September. Sunrise moves from 7:44 AM to 7:08 AM, and sunset from 7:07 PM to 7:23 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.47:447:07
211.47:437:07
311.47:427:08
411.57:417:08
511.57:397:09
611.57:387:09
711.67:377:10
811.67:367:11
911.67:347:11
1011.67:337:12
1111.77:327:12
1211.77:317:13
1311.77:297:13
1411.87:287:14
1511.87:277:14
1611.87:257:15
1711.97:247:15
1811.97:237:16
1911.97:227:17
2011.97:207:17
2112.07:197:18
2212.07:187:18
2312.07:167:19
2412.17:157:19
2512.17:147:20
2612.17:137:20
2712.27:117:21
2812.27:107:22
2912.27:097:22
3012.37:087:23

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.05 kWh/m².

For context, solar energy here swings from a low near 2.38 kWh/m² to a high of 6.48 kWh/m² in December across the year — September's 4.05 kWh/m² falls in the middle.

012345151015202530
Solar energy (kWh/m²)Level
13.8Moderate
23.8Moderate
33.8Moderate
43.8Moderate
53.8Moderate
63.8Moderate
73.9Moderate
83.9Moderate
93.9Moderate
103.9Moderate
113.9Moderate
123.9Moderate
134.0Moderate
144.0Moderate
154.0Bright
164.0Bright
174.1Bright
184.1Bright
194.1Bright
204.2Bright
214.2Bright
224.2Bright
234.2Bright
244.3Bright
254.3Bright
264.3Bright
274.3Bright
284.3Bright
294.4Bright
304.4Bright
Planning a trip in September

Is September a good time to visit Montenegro?

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

6.3
Sightseeing
4th-best month of the year
4.5
Beach & pool
8th-best month of the year

September is a reasonable time to visit Montenegro for sightseeing.

What to pack for Montenegro in September

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

In September, Montenegro sees daytime highs around 22°C and nights near 13°C. Worth packing: light clothes and rain gear. About 12 days see rain.

light clothesrain gear

UV index in Montenegro in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 8 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Montenegro peaks around January 15 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 19 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highModerateHighVery highExtremeJan 15UV 13Jun 19UV 3
UV index (midday)Level
Jan13Extreme
Feb12Extreme
Mar10Very high
Apr8Very high
May5Moderate
Jun3Moderate
Jul4Moderate
Aug5High
Sep8Very high
Oct7High
Nov11Extreme
Dec12Extreme

Air quality in Montenegro 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 Montenegro is worst in August — around 20 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (December, 10 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodAug 1720 µg/m³Dec 1811 µg/m³
PM2.5 (µg/m³)Level
Jan12Good
Feb11Good
Mar12Good
Apr15Moderate
May17Moderate
Jun17Moderate
Jul19Moderate
Aug20Moderate
Sep19Moderate
Oct13Moderate
Nov12Good
Dec10Good
Location & terrain

Where is Montenegro?

Montenegro sits at 29.7°S, 51.5°W, 21 m above sea level, in Brazil. The nearest listed city is São Sebastião do Caí, 14 km away.

Topography around Montenegro

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

Within 3 km, the terrain around Montenegro has only modest variations in elevation — a maximum elevation change of 216 m around an average of 29 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 284 m; within 80 km, large variations in elevation — a maximum elevation change of 935 m.

The land around Montenegro is covered by trees (49%) and artificial surfaces (24%) within 3 km, trees (63%) and grassland (26%) within 16 km, and trees (60%) within 80 km.

3 km
216 m
16 km
284 m
80 km
935 m
treesgrasslandcroplandartificial surfaceswaterwetland
September weather nearby: São Sebastião do Caí 14 km · Portão 21 km · Nova Santa Rita 25 km · Estância Velha 28 km · Ivoti 31 km · São Leopoldo 31 km · Novo Hamburgo 32 km · Esteio 33 km

Brazil travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / N
127 / 220 V · 60 Hz
Prices
≈ 46% of US
price level, 2025
GDP per capita
$10,713
2025
Happiness
6.6 / 10
World Happiness, 2025
Safe drinking water
89%
of population, 2024
Homicide rate
19.3
per 100k, 2023
Road deaths
16
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Low
EF EPI 482
Religion
Roman Catholic 57%Evangelical 27%none 9%other 4%

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 Montenegro (-29.6886°, -51.4611°, elevation 21 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).