Serro weather in September

In September, Serro sees average daytime highs of 26°C and overnight lows near 14°C, with 48 mm of rain across 6.7 wet days and about 11.9 hours of daylight. It is the 6th-warmest and 8th-wettest month of the year here.

Day-to-day highs hold fairly steady near 26°C through the month. The sky is clear or mostly clear about 42% of the time in September, and the air most often feels dry.

Daylight stretches from about 11 h 36 min at the start of September to 12 h 06 min by month's end. Set against the rest of the year, September is Serro's 3rd-clearest and 1st-windiest month. For the whole year in context, see Serro's year-round climate.

Daytime high
26°
6th warmest
Overnight low
14°
5th coldest
Rainfall
48 mm
6.7 wet days
Daylight
11 h 54 min
6:51 AM – 6:45 PM
Cloud cover
49%
3rd clearest
Wind
9 km/h
1st windiest
Solar energy
5.6 kWh/m²
Travel score
7.4
out of 10

Serro is human settlement in Brazil.

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 26°C through the month.

A typical September day in Serro reaches about 26°C in the afternoon and slips back to 14°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 22°C and 30°C. Set against its neighbours, September runs about 2°C warmer than August and on par with October.

10°15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12513
22513
32513
42513
52513
62513
72514
82614
92614
102614
112614
122614
132614
142614
152614
162614
172614
182614
192614
202615
212615
222615
232615
242615
252615
262615
272615
282615
292615
302615

Serro weather by month

How September compares with the rest of the year at a glance. September is the 6th-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan27° / 18°22417135.3
Feb27° / 18°15513.312.65.7
Mar26° / 17°17816.712.15.5
Apr25° / 16°9012.111.66.4
May24° / 14°346.811.17.4
Jun23° / 13°112.710.98.0
Jul23° / 12°82.2118.2
Aug24° / 12°122.911.48.4
Sep26° / 14°486.711.97.4
Oct26° / 16°11712.112.46.3
Nov25° / 17°25619.912.94.9
Dec26° / 18°30921.613.14.7

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 42% 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 40%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17327
27327
37228
47228
57228
67129
77030
86931
96733
106733
116535
126535
136337
146238
156238
166040
175941
185842
195644
205545
215446
225347
235248
245149
254951
264951
275050
284951
294852
304852

Chance of precipitation in September

Any precipitation

Serro gets around 48 mm of rain over 6.7 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 36% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
112
212
312
412
512
612
713
813
914
1015
1116
1217
1318
1420
1521
1622
1724
1825
1927
2028
2129
2231
2332
2433
2533
2634
2735
2835
2936
3036

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 46% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1633250
2633250
3633250
4633250
5633250
6623260
7623260
8603370
9593380
10583480
11563590
125436100
135336110
145037121
154838131
164639151
174439161
184240171
193941191
203741201
213642212
223442232
233242242
243141252
253041273
262940283
272840293
282739303
292639324
302539324

Wind in September

Winds average 9 km/h in September, the windiest month of the year.

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 11 h 36 min at the start of September to 12 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 30 minutes over September. Sunrise moves from 7:04 AM to 6:38 AM, and sunset from 6:42 PM to 6:47 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.67:046:42
211.67:036:42
311.77:036:42
411.77:026:43
511.77:016:43
611.77:006:43
711.76:596:43
811.86:586:43
911.86:576:44
1011.86:566:44
1111.86:566:44
1211.86:556:44
1311.86:546:44
1411.96:536:44
1511.96:526:45
1611.96:516:45
1711.96:506:45
1811.96:496:45
1912.06:486:45
2012.06:476:45
2112.06:466:46
2212.06:456:46
2312.06:456:46
2412.06:446:46
2512.16:436:46
2612.16:426:46
2712.16:416:47
2812.16:406:47
2912.16:396:47
3012.16:386:47

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.6 kWh/m².

For context, solar energy here swings from a low near 3.9 kWh/m² to a high of 6.01 kWh/m² in February across the year — September's 5.6 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.4Bright
25.5Bright
35.5Bright
45.5Bright
55.5Bright
65.6Bright
75.6Bright
85.6Bright
95.6Bright
105.6Bright
115.6Bright
125.6Bright
135.6Bright
145.6Bright
155.6Bright
165.6Bright
175.6Bright
185.6Bright
195.6Bright
205.6Bright
215.6Bright
225.6Bright
235.6Bright
245.6Bright
255.6Bright
265.6Bright
275.6Bright
285.6Bright
295.6Bright
305.6Bright
Planning a trip in September

Hazard calendar for Serro

In seasonPeak

None of Serro's seasonal hazards are active in September. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Serro's monsoon runs November–March, when most of the year's rain falls.

Monsoon
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is September a good time to visit Serro?

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

7.4
Sightseeing
4th-best month of the year
6.9
Beach & pool
2nd-best month of the year

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

What to pack for Serro in September

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

In September, Serro sees daytime highs around 26°C and nights near 14°C. Worth packing: light clothes and sun protection. About 7 days see rain.

light clothessun protection

UV index in Serro in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Serro peaks around February 12 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 22 at about 7 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeFeb 12UV 15Jun 22UV 7
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar14Extreme
Apr11Extreme
May8Very high
Jun7Very high
Jul7Very high
Aug9Very high
Sep10Extreme
Oct12Extreme
Nov14Extreme
Dec14Extreme
Location & terrain

Where is Serro?

Serro sits at 18.6°S, 43.4°W, 821 m above sea level, in Brazil. The nearest listed city is Diamantina, 46 km away.

Topography around Serro

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

Within 3 km, the terrain around Serro has only modest variations in elevation — a maximum elevation change of 229 m around an average of 810 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 926 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,684 m.

The land around Serro is covered by trees (52%) and grassland (43%) within 3 km, trees (55%) and grassland (45%) within 16 km, and trees (50%) and grassland (46%) within 80 km.

3 km
229 m
16 km
926 m
80 km
1,684 m
treesshrubsgrasslandartificial surfaces
September weather nearby: Diamantina 46 km · Conceição do Mato Dentro 48 km · Guanhães 51 km · São João Evangelista 65 km · Peçanha 87 km · Itamarandiba 100 km · Jaboticatubas 108 km · Curvelo 112 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 Serro (-18.6047°, -43.3794°, elevation 821 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).