Posse weather in September

In September, Posse sees average daytime highs of 32°C and overnight lows near 19°C, with 20 mm of rain across 3.3 wet days and about 11.9 hours of daylight. It is the 1st-warmest and 9th-wettest month of the year here.

Day-to-day highs hold fairly steady near 32°C through the month. The sky is clear or mostly clear about 52% of the time in September, and the air most often feels dry.

Daylight stretches from about 11 h 42 min at the start of September to 12 h 06 min by month's end. Set against the rest of the year, September is Posse's 4th-clearest and 3rd-windiest month. For the whole year in context, see Posse's year-round climate.

Daytime high
32°
1st warmest
Overnight low
19°
6th coldest
Rainfall
20 mm
3.3 wet days
Daylight
11 h 54 min
7:02 AM – 6:57 PM
Cloud cover
40%
4th clearest
Wind
12 km/h
3rd windiest
Solar energy
6.36 kWh/m²
Travel score
4.9
out of 10

Posse 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 32°C through the month.

A typical September day in Posse reaches about 32°C in the afternoon and slips back to 19°C overnight — a 13°C spread between the day's warmth and the night's chill. On most days the high lands between 29°C and 35°C. Set against its neighbours, September runs about 2°C warmer than August and on par with October.

15°20°25°30°35°40°151015202530
Avg high (°C)Avg low (°C)
13118
23118
33118
43119
53119
63219
73219
83219
93219
103219
113219
123219
133219
143219
153219
163219
173219
183220
193220
203220
213220
223220
233220
243220
253220
263220
273220
283220
293220
303220

How September really feels in Posse

Once humidity and wind are folded in, September averages 14 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
14
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in September is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Posse weather by month

How September compares with the rest of the year at a glance. September is the 1st-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 20°22821.212.74.4
Feb28° / 20°21719.212.54.3
Mar28° / 20°2382112.14.3
Apr29° / 19°12012.311.75.3
May29° / 18°244.311.46.5
Jun28° / 17°20.511.27.4
Jul29° / 16°0011.37.6
Aug30° / 17°20.711.56.5
Sep32° / 19°203.311.94.9
Oct31° / 20°11411.512.34.2
Nov29° / 20°24920.912.74.1
Dec28° / 20°23921.312.84.4

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 52% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 24% of September, with mostly cloudy or overcast conditions the remaining 24%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
18416
28317
38317
48317
58218
68218
78218
88119
98119
108119
118020
127921
137822
147822
157723
167723
177624
187525
197426
207327
217228
227228
237030
246931
256931
266733
276733
286535
296535
306535

Chance of precipitation in September

Any precipitation

Posse gets around 20 mm of rain over 3.3 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 11% and peaks near 23% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%151015202530
Rain chance (%)
14
25
35
45
55
65
75
85
95
105
116
126
137
148
159
1610
1711
1812
1913
2014
2115
2216
2317
2418
2519
2620
2721
2822
2922
3023

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 68% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1831250
2831250
3821260
4821260
5821260
6821260
7811270
8811270
9801370
10801370
11791371
12771481
13771481
14751582
15751582
16721693
17701794
186817105
196518116
206318127
216119137
225820148
235620159
245421169
2551221710
2649221810
2747232011
2845232111
2943232212
3042232212

Wind in September

Winds average 12 km/h in September.

Across September, daily wind ranges from about 11 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
113light breeze
213light breeze
313light breeze
413light breeze
513light breeze
613light breeze
713light breeze
813light breeze
913light breeze
1013light breeze
1113light breeze
1212light breeze
1312light breeze
1412light breeze
1512light breeze
1612light breeze
1712calm
1812calm
1912calm
2012calm
2112calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 42 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 24 minutes over September. Sunrise moves from 7:13 AM to 6:51 AM, and sunset from 6:57 PM to 6:58 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.77:136:57
211.77:136:57
311.77:126:57
411.87:116:57
511.87:116:57
611.87:106:57
711.87:096:57
811.87:086:57
911.87:086:57
1011.87:076:57
1111.97:066:57
1211.97:056:57
1311.97:046:57
1411.97:046:57
1511.97:036:57
1611.97:026:57
1711.97:016:58
1811.97:016:58
1912.07:006:58
2012.06:596:58
2112.06:586:58
2212.06:576:58
2312.06:576:58
2412.06:566:58
2512.06:556:58
2612.16:546:58
2712.16:546:58
2812.16:536:58
2912.16:526:58
3012.16:516:58

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.36 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 4.79 kWh/m² to a high of 6.36 kWh/m² in September across the year — September's 6.36 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
16.2Intense
26.2Intense
36.2Intense
46.3Intense
56.3Intense
66.3Intense
76.3Intense
86.3Intense
96.4Intense
106.4Intense
116.4Intense
126.4Intense
136.4Intense
146.4Intense
156.4Intense
166.4Intense
176.4Intense
186.4Intense
196.4Intense
206.4Intense
216.4Intense
226.4Intense
236.3Intense
246.3Intense
256.3Intense
266.3Intense
276.3Intense
286.3Intense
296.3Intense
306.3Intense
Planning a trip in September

Hazard calendar for Posse

In seasonPeak

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

Posse's monsoon runs October–April, 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 Posse?

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

4.9
Sightseeing
6th-best month of the year
7.7
Beach & pool
5th-best month of the year

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

What to pack for Posse in September

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

In September, Posse sees daytime highs around 32°C and nights near 19°C. Pack light clothes and sun protection. About 3 days see rain.

light clothessun protection

UV index in Posse in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Posse peaks around February 16 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 22 at about 8 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeFeb 16UV 15Jun 22UV 8
UV index (midday)Level
Jan14Extreme
Feb16Extreme
Mar14Extreme
Apr12Extreme
May10Very high
Jun8Very high
Jul9Very high
Aug10Extreme
Sep13Extreme
Oct12Extreme
Nov14Extreme
Dec13Extreme

Air quality in Posse 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 Posse is worst in October — around 18 µg/m³ PM2.5 (moderate), about 4.5× the cleanest month (June, 4 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodOct 1018 µg/m³Jun 204 µg/m³
PM2.5 (µg/m³)Level
Jan6Good
Feb6Good
Mar6Good
Apr6Good
May5Good
Jun4Good
Jul4Good
Aug7Good
Sep17Moderate
Oct18Moderate
Nov8Good
Dec7Good
Location & terrain

Where is Posse?

Posse sits at 14.1°S, 46.4°W, 815 m above sea level, in Brazil. The nearest listed city is Campos Belos, 125 km away.

Topography around Posse

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

Within 3 km, the terrain around Posse has only modest variations in elevation — a maximum elevation change of 139 m around an average of 796 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 531 m; within 80 km, large variations in elevation — a maximum elevation change of 862 m.

The land around Posse is covered by grassland (29%), trees (27%) and shrubs (26%) within 3 km, shrubs (34%), trees (32%) and grassland (28%) within 16 km, and grassland (29%), shrubs (28%) and cropland (25%) within 80 km.

3 km
139 m
16 km
531 m
80 km
862 m
treesshrubsgrasslandcroplandartificial surfacesbare terrain
September weather nearby: Campos Belos 125 km · Buritis 170 km · Formosa 191 km · Cocos 198 km · Planaltina 202 km · Arinos 205 km · Correntina 205 km · Minaçu 209 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 Posse (-14.0931°, -46.3694°, elevation 815 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).