Sertanópolis weather in September

In September, Sertanópolis sees average daytime highs of 29°C and overnight lows near 17°C, with 88 mm of rain across 8 wet days and about 11.9 hours of daylight. It is the 8th-warmest and 7th-wettest month of the year here.

Day-to-day highs hold fairly steady near 29°C through the month. The sky is clear or mostly clear about 51% of the time in September, and the air most often feels comfortable.

Daylight stretches from about 11 h 30 min at the start of September to 12 h 12 min by month's end. Set against the rest of the year, September is Sertanópolis's 3rd-clearest and 1st-windiest month. For the whole year in context, see Sertanópolis's year-round climate.

Daytime high
29°
8th warmest
Overnight low
17°
5th coldest
Rainfall
88 mm
8 wet days
Daylight
11 h 54 min
7:22 AM – 7:15 PM
Cloud cover
45%
3rd clearest
Wind
10 km/h
1st windiest
Solar energy
5.27 kWh/m²
Travel score
6.0
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 29°C through the month.

A typical September day in Sertanópolis reaches about 29°C in the afternoon and slips back to 17°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 23°C and 35°C. Set against its neighbours, September runs about 2°C warmer than August and about 1°C cooler than October.

10°20°30°40°151015202530
Avg high (°C)Avg low (°C)
12916
22916
32917
42917
52917
62917
72917
82917
92917
102917
112917
122917
132917
142917
152917
162917
172917
182917
192918
202918
212918
222918
232918
242918
252918
262918
272918
282918
292918
302918

How September really feels in Sertanópolis

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.

Sertanópolis weather by month

How September compares with the rest of the year at a glance. September is the 8th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 22°19619.113.33.7
Feb31° / 22°1501712.83.8
Mar31° / 21°10213.112.24.4
Apr29° / 19°626.211.56.0
May26° / 16°737.110.97.3
Jun25° / 15°64610.67.8
Jul25° / 14°424.610.78.0
Aug27° / 15°444.311.27.6
Sep29° / 17°88811.96.0
Oct30° / 19°11511.512.54.9
Nov31° / 20°13012.413.14.4
Dec31° / 22°14916.313.43.9

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 51% 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 39%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17426
27327
37228
47129
57030
67030
76832
86733
96634
106535
116436
126436
136337
146238
156238
166139
176040
186040
195941
205842
215743
225743
235644
245545
255446
265248
275149
285050
295050
304951

Chance of precipitation in September

Any precipitation

Sertanópolis gets around 88 mm of rain over 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 26% 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 (%)
118
218
319
420
521
621
722
823
923
1024
1124
1224
1325
1425
1526
1626
1726
1827
1928
2028
2129
2230
2331
2431
2532
2633
2734
2834
2935
3035

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

Most of September feels comfortable — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, September lands in the comfortable band about 34% of days. Sticky, muggy-or-worse air turns up on roughly 14% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
128442350
228442450
327432460
427422460
527412570
627402570
727392680
826382780
926372890
1026362990
11253530100
12243531100
13233432110
14233333110
15223334120
16213234120
17203235130
18203135140
19193136140
20183036150
21183036160
22172936171
23162936191
24152836201
25152835211
26142735231
27142734241
28132634261
29132633271
30122533292

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 30 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 42 minutes over September. Sunrise moves from 7:38 AM to 7:08 AM, and sunset from 7:10 PM to 7:19 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.57:387:10
211.67:377:10
311.67:367:10
411.67:357:11
511.67:347:11
611.67:337:11
711.77:327:12
811.77:317:12
911.77:307:12
1011.77:297:13
1111.87:287:13
1211.87:277:13
1311.87:267:14
1411.87:257:14
1511.87:237:14
1611.97:227:15
1711.97:217:15
1811.97:207:15
1911.97:197:15
2012.07:187:16
2112.07:177:16
2212.07:167:16
2312.07:157:17
2412.17:147:17
2512.17:137:17
2612.17:127:18
2712.17:117:18
2812.17:107:18
2912.27:097:19
3012.27:087:19

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.27 kWh/m².

For context, solar energy here swings from a low near 3.4 kWh/m² to a high of 6.1 kWh/m² in November across the year — September's 5.27 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.1Bright
25.1Bright
35.1Bright
45.1Bright
55.1Bright
65.2Bright
75.2Bright
85.2Bright
95.2Bright
105.2Bright
115.2Bright
125.2Bright
135.3Bright
145.3Bright
155.3Bright
165.3Bright
175.3Bright
185.3Bright
195.3Bright
205.3Bright
215.4Bright
225.4Bright
235.4Bright
245.4Bright
255.4Bright
265.4Bright
275.4Bright
285.4Bright
295.4Bright
305.5Bright
Planning a trip in September

Hazard calendar for Sertanópolis

In seasonPeak

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

Sertanópolis's rainy season runs October–March, when most of the year's rain falls.

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

Is September a good time to visit Sertanópolis?

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

6.0
Sightseeing
5th-best month of the year
7.6
Beach & pool
3rd-best month of the year

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

What to pack for Sertanópolis in September

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

In September, Sertanópolis sees daytime highs around 29°C and nights near 17°C. Pack light clothes. Worth having: rain gear and sun protection. About 8 days see rain.

light clothesrain gearsun protection

UV index in Sertanópolis in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 5 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Sertanópolis peaks around January 21 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 13 at about 5 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighExtremeJan 21UV 15Jul 13UV 5
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar12Extreme
Apr9Very high
May7High
Jun6High
Jul5High
Aug7Very high
Sep5High
Oct11Extreme
Nov13Extreme
Dec13Extreme

Air quality in Sertanópolis 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 Sertanópolis is worst in September — around 21 µg/m³ PM2.5 (moderate), about 2.5× the cleanest month (November, 8 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1620 µg/m³Nov 228 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb9Good
Mar9Good
Apr10Good
May11Good
Jun11Good
Jul12Good
Aug14Moderate
Sep21Moderate
Oct14Moderate
Nov8Good
Dec9Good
Location & terrain

Where is Sertanópolis?

Sertanópolis sits at 23.1°S, 51.0°W, 403 m above sea level, in Brazil. The nearest listed city is Ibiporã, 23 km away.

Topography around Sertanópolis

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

Within 3 km, the terrain around Sertanópolis has only modest variations in elevation — a maximum elevation change of 131 m around an average of 378 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 304 m; within 80 km, large variations in elevation — a maximum elevation change of 814 m.

The land around Sertanópolis is covered by cropland (70%) within 3 km, cropland (65%) within 16 km, and cropland (65%) within 80 km.

3 km
131 m
16 km
304 m
80 km
814 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Ibiporã 23 km · Londrina 31 km · Cambé 35 km · Cornélio Procópio 42 km · Rolândia 44 km · Jaguapitã 51 km · Arapongas 56 km · Astorga 67 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 Sertanópolis (-23.0586°, -51.0364°, elevation 403 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).