Posto da Mata weather in September

In September, Posto da Mata sees average daytime highs of 27°C and overnight lows near 20°C, with 41 mm of rain across 8.9 wet days and about 11.9 hours of daylight. It is the 9th-warmest and 11th-wettest month of the year here.

Day-to-day highs hold fairly steady near 27°C through the month. The sky is clear or mostly clear about 31% of the time in September, and the air most often feels muggy.

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 Posto da Mata's 4th-clearest and 3rd-windiest month. For the whole year in context, see Posto da Mata's year-round climate.

Daytime high
27°
9th warmest
Overnight low
20°
4th coldest
Rainfall
41 mm
8.9 wet days
Daylight
11 h 54 min
5:37 AM – 5:31 PM
Cloud cover
54%
4th clearest
Wind
12 km/h
3rd windiest
Solar energy
4.92 kWh/m²
Travel score
6.6
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 27°C through the month.

A typical September day in Posto da Mata reaches about 27°C in the afternoon and slips back to 20°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 24°C and 30°C. Set against its neighbours, September runs about 1°C warmer than August and about 1°C cooler than October.

15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12720
22720
32720
42720
52720
62720
72720
82720
92720
102720
112720
122720
132720
142720
152720
162720
172720
182720
192720
202720
212721
222821
232821
242821
252821
262821
272821
282821
292821
302821

How September really feels in Posto da Mata

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.

Posto da Mata weather by month

How September compares with the rest of the year at a glance. September is the 9th-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 23°9613.6134.3
Feb31° / 23°6812.812.64.1
Mar30° / 23°13917.912.14.0
Apr29° / 22°9217.311.64.5
May28° / 21°6213.911.25.9
Jun27° / 20°4511.310.96.5
Jul26° / 19°4511.3116.7
Aug26° / 19°369.311.46.9
Sep27° / 20°418.911.96.6
Oct28° / 21°8512.112.45.6
Nov29° / 22°16216.112.84.7
Dec30° / 23°13515.213.14.4

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 31% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 30% 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 (%)
16931
26931
36832
46832
56733
66733
76634
86634
96634
106535
116436
126436
136337
146337
156337
166238
176139
186040
196040
205941
215842
225743
235644
245545
255545
265347
275347
285149
295149
305050

Chance of precipitation in September

Any precipitation

Posto da Mata gets around 41 mm of rain over 8.9 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 30% and peaks near 35% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
128
228
328
428
528
628
728
828
928
1028
1129
1229
1329
1429
1529
1630
1730
1830
1930
2031
2131
2231
2331
2432
2532
2632
2733
2833
2934
3035

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the muggy band about 71% of days. Sticky, muggy-or-worse air turns up on roughly 78% of them.

0%25%50%75%100%151015202530
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1422713
2422713
3423703
4423703
5423703
6423703
7423703
8422704
9422704
10422704
11421705
12420715
13420715
14419716
15319726
16319717
17318727
18318718
19317728
20317719
21316729
223167110
233167110
243157111
253157012
263147112
273147013
283137014
293136915
303126916

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 12 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
111calm
211calm
311calm
411calm
511calm
611calm
711calm
811calm
911calm
1012calm
1112calm
1212calm
1312calm
1412calm
1512calm
1612calm
1712calm
1812calm
1912light breeze
2012light breeze
2112light breeze
2212light breeze
2312light breeze
2412light breeze
2512light breeze
2612light breeze
2712light breeze
2812light breeze
2912light breeze
3012light breeze

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 5:50 AM to 5:24 AM, and sunset from 5:28 PM to 5:33 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.65:505:28
211.75:495:29
311.75:485:29
411.75:475:29
511.75:465:29
611.75:465:29
711.75:455:29
811.85:445:30
911.85:435:30
1011.85:425:30
1111.85:415:30
1211.85:405:30
1311.85:395:30
1411.95:395:30
1511.95:385:31
1611.95:375:31
1711.95:365:31
1811.95:355:31
1912.05:345:31
2012.05:335:31
2112.05:325:32
2212.05:315:32
2312.05:315:32
2412.05:305:32
2512.15:295:32
2612.15:285:32
2712.15:275:32
2812.15:265:33
2912.15:255:33
3012.15:245:33

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.92 kWh/m².

For context, solar energy here swings from a low near 3.58 kWh/m² to a high of 6.31 kWh/m² in January across the year — September's 4.92 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
14.7Bright
24.7Bright
34.7Bright
44.7Bright
54.8Bright
64.8Bright
74.8Bright
84.8Bright
94.8Bright
104.8Bright
114.9Bright
124.9Bright
134.9Bright
144.9Bright
154.9Bright
164.9Bright
174.9Bright
185.0Bright
195.0Bright
205.0Bright
215.0Bright
225.0Bright
235.0Bright
245.0Bright
255.0Bright
265.1Bright
275.1Bright
285.1Bright
295.1Bright
305.1Bright
Planning a trip in September

Is September a good time to visit Posto da Mata?

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

6.6
Sightseeing
3rd-best month of the year
6.8
Beach & pool
1st-best month of the year

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

What to pack for Posto da Mata in September

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

In September, Posto da Mata sees daytime highs around 27°C and nights near 20°C. Pack light clothes. Worth having: rain gear and sun protection. About 9 days see rain.

light clothesrain gearsun protection

Sea temperature near Posto da Mata in September

The nearest coast averages about 25°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 36 km away) is warmest in March at about 28°C and coldest in August near 24°C.

The water stays above 20°C all year — warm enough for a swim any month.

22°24°26°28°30°JanFebMarAprMayJunJulAugSepOctNovDecrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan27Warm
Feb27Warm
Mar28Warm
Apr28Warm
May26Warm
Jun25Warm
Jul24Warm
Aug24Warm
Sep25Warm
Oct26Warm
Nov26Warm
Dec27Warm

UV index in Posto da Mata 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 Posto da Mata peaks around February 14 at about 14 (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 14UV 14Jun 22UV 7
UV index (midday)Level
Jan14Extreme
Feb15Extreme
Mar13Extreme
Apr11Extreme
May8Very high
Jun7Very high
Jul7Very high
Aug9Very high
Sep10Extreme
Oct12Extreme
Nov14Extreme
Dec13Extreme
Location & terrain

Where is Posto da Mata?

Posto da Mata sits at 17.9°S, 39.9°W, 78 m above sea level, in Brazil. The nearest listed city is Pedro Canário, 35 km away.

Topography around Posto da Mata

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

Within 3 km, the terrain around Posto da Mata has only modest variations in elevation — a maximum elevation change of 55 m around an average of 86 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 140 m; within 80 km, large variations in elevation — a maximum elevation change of 746 m.

The land around Posto da Mata is covered by trees (47%) and grassland (36%) within 3 km, trees (69%) and grassland (28%) within 16 km, and grassland (48%) and trees (34%) within 80 km.

3 km
55 m
16 km
140 m
80 km
746 m
treesgrasslandcroplandartificial surfaceswatermangroves
September weather nearby: Pedro Canário 35 km · Mucuri 39 km · Teixeira de Freitas 41 km · Nova Viçosa 52 km · Nanuque 53 km · Montanha 60 km · Pinheiros 66 km · Medeiros Neto 69 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 Posto da Mata (-17.8861°, -39.8589°, elevation 78 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. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. 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).