Serrana weather in September

In September, Serrana sees average daytime highs of 30°C and overnight lows near 18°C, with 69 mm of rain across 7.4 wet days and about 11.9 hours of daylight. It is the 2nd-warmest and 7th-wettest month of the year here.

Day-to-day highs hold fairly steady near 30°C through the month. The sky is clear or mostly clear about 53% 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 12 min by month's end. Set against the rest of the year, September is Serrana's 4th-clearest and 1st-windiest month. For the whole year in context, see Serrana's year-round climate.

Daytime high
30°
2nd warmest
Overnight low
18°
5th coldest
Rainfall
69 mm
7.4 wet days
Daylight
11 h 54 min
7:08 AM – 7:01 PM
Cloud cover
43%
4th clearest
Wind
9 km/h
1st windiest
Solar energy
5.68 kWh/m²
Travel score
5.6
out of 10

Serrana is central town of Serrana Municipality, 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 30°C through the month.

A typical September day in Serrana reaches about 30°C in the afternoon and slips back to 18°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 25°C and 34°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)
12916
23017
33017
43017
53017
63017
73017
83017
93017
103017
113017
123018
133018
143018
153018
163018
173018
183018
193018
203018
213018
223018
233018
243018
253018
263018
273018
283018
293018
303018

Serrana weather by month

How September compares with the rest of the year at a glance. September is the 2nd-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 20°26923.513.13.6
Feb29° / 20°18818.812.73.9
Mar29° / 20°16618.912.14.4
Apr28° / 18°689.311.56.0
May26° / 15°475.7117.5
Jun26° / 14°273.110.78.2
Jul26° / 14°192.410.88.3
Aug28° / 15°19311.37.5
Sep30° / 18°697.411.95.6
Oct30° / 19°11613.212.54.6
Nov29° / 20°17217.5134.3
Dec29° / 20°23022.913.33.8

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 53% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 14% of September, with mostly cloudy or overcast conditions the remaining 33%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17822
27822
37822
47723
57624
67624
77525
87426
97327
107228
117129
127030
136931
146832
156733
166634
176634
186535
196436
206337
216238
226139
236040
245941
255842
265743
275743
285644
295545
305446

Chance of precipitation in September

Any precipitation

Serrana gets around 69 mm of rain over 7.4 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 35% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
114
214
315
416
516
617
718
819
919
1020
1121
1222
1322
1423
1524
1625
1726
1827
1928
2028
2129
2230
2331
2432
2533
2633
2734
2834
2935
3035

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 6% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
16125131
26025141
36025141
45826151
55626162
65526172
75327182
85227192
95028193
104928203
114729213
124629213
134430224
144331234
154132234
163932245
173833245
183633256
193534256
203334267
213234277
223034288
232933299
2428332910
2526333011
2625323112
2724313113
2823303214
2922303315
3022293316

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 12 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 36 minutes over September. Sunrise moves from 7:23 AM to 6:55 AM, and sunset from 6:57 PM to 7:05 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.67:236:57
211.67:226:58
311.67:216:58
411.67:206:58
511.77:196:58
611.77:186:59
711.77:176:59
811.77:166:59
911.77:156:59
1011.87:147:00
1111.87:137:00
1211.87:127:00
1311.87:117:00
1411.87:107:01
1511.97:097:01
1611.97:087:01
1711.97:077:01
1811.97:067:02
1911.97:057:02
2012.07:047:02
2112.07:037:02
2212.07:027:03
2312.07:017:03
2412.07:007:03
2512.16:597:03
2612.16:587:04
2712.16:577:04
2812.16:567:04
2912.26:557:05
3012.26:557:05

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.68 kWh/m².

For context, solar energy here swings from a low near 3.92 kWh/m² to a high of 5.99 kWh/m² in October across the year — September's 5.68 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.5Bright
25.5Bright
35.5Bright
45.5Bright
55.6Bright
65.6Bright
75.6Bright
85.6Bright
95.6Bright
105.6Bright
115.6Bright
125.7Bright
135.7Bright
145.7Bright
155.7Bright
165.7Bright
175.7Bright
185.7Bright
195.7Bright
205.7Bright
215.7Bright
225.7Bright
235.7Bright
245.8Bright
255.8Bright
265.8Bright
275.8Bright
285.8Bright
295.8Bright
305.8Bright
Planning a trip in September

Hazard calendar for Serrana

In seasonPeak

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

Serrana'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 Serrana?

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

5.6
Sightseeing
6th-best month of the year
7.6
Beach & pool
4th-best month of the year

September is a reasonable time to visit Serrana for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Serrana in September

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

In September, Serrana sees daytime highs around 30°C and nights near 18°C. Pack light clothes. Worth having: sun protection. About 7 days see rain.

light clothessun protection

UV index in Serrana 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 Serrana peaks around January 21 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 22 at about 7 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighVery highExtremeJan 21UV 15Jun 22UV 7
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar13Extreme
Apr10Very high
May8Very high
Jun7High
Jul7High
Aug9Very high
Sep10Very high
Oct11Extreme
Nov14Extreme
Dec14Extreme

Air quality in Serrana 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 Serrana is worst in September — around 43 µg/m³ PM2.5 (poor), about 5.2× the cleanest month (November, 8 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateModerateGoodSep 1540 µg/m³Nov 229 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb10Good
Mar10Good
Apr11Good
May12Good
Jun11Good
Jul11Good
Aug20Moderate
Sep43Poor
Oct15Moderate
Nov8Good
Dec9Good
Location & terrain

Where is Serrana?

Serrana sits at 21.2°S, 47.6°W, 560 m above sea level, in Brazil. The nearest listed city is Cravinhos, 20 km away.

Topography around Serrana

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

Within 3 km, the terrain around Serrana has only modest variations in elevation — a maximum elevation change of 187 m around an average of 585 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 365 m; within 80 km, large variations in elevation — a maximum elevation change of 785 m.

The land around Serrana is covered by cropland (51%) and artificial surfaces (20%) within 3 km, cropland (59%) and trees (27%) within 16 km, and cropland (55%) and trees (31%) within 80 km.

3 km
187 m
16 km
365 m
80 km
785 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Cravinhos 20 km · Ribeirão Preto 23 km · Brodowski 25 km · Jardinópolis 28 km · Altinópolis 31 km · Cajuru 31 km · Batatais 36 km · Santa Rosa de Viterbo 38 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 Serrana (-21.2114°, -47.5956°, elevation 560 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).