Pedro do Rosário weather in September

In September, Pedro do Rosário sees average daytime highs of 33°C and overnight lows near 24°C, with 17 mm of rain across 4.2 wet days and about 12 hours of daylight. It is the 3rd-warmest and 12th-wettest month of the year here.

Day-to-day highs hold fairly steady near 33°C through the month. The sky is clear or mostly clear about 56% of the time in September, and the air most often feels oppressive.

Daylight stretches from about 11 h 54 min at the start of September to 12 hours by month's end. Set against the rest of the year, September is Pedro do Rosário's 1st-clearest and 2nd-windiest month. For the whole year in context, see Pedro do Rosário's year-round climate.

Daytime high
33°
3rd warmest
Overnight low
24°
9th coldest
Rainfall
17 mm
4.2 wet days
Daylight
12 hours
5:56 AM – 5:55 PM
Cloud cover
41%
1st clearest
Wind
11 km/h
2nd windiest
Solar energy
5.99 kWh/m²
Travel score
4.1
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 33°C through the month.

A typical September day in Pedro do Rosário reaches about 33°C in the afternoon and slips back to 24°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 32°C and 34°C. Set against its neighbours, September runs about 1°C warmer than August and on par with October.

20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
13324
23324
33324
43324
53324
63324
73324
83324
93324
103324
113324
123324
133324
143324
153324
163324
173324
183324
193324
203324
213324
223324
233324
243324
253324
263324
273324
283324
293324
303324

How September really feels in Pedro do Rosário

Once humidity and wind are folded in, September averages 30 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
30
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.

Pedro do Rosário weather by month

How September compares with the rest of the year at a glance. September is the 3rd-warmest and 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan32° / 24°23525.212.22.6
Feb31° / 24°31226.112.12.5
Mar30° / 24°42229.8122.5
Apr30° / 24°44128.411.92.6
May31° / 24°27625.311.93.0
Jun30° / 23°12218.611.83.8
Jul31° / 23°7412.911.84.5
Aug32° / 23°287.311.94.5
Sep33° / 24°174.2124.1
Oct34° / 24°24512.13.6
Nov33° / 25°447.412.13.5
Dec33° / 24°9914.912.23.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 56% of the time in September, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 32% of September, with mostly cloudy or overcast conditions the remaining 13%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
18911
28911
38911
48911
58911
68911
78911
88911
98812
108812
118812
128812
138812
148812
158713
168713
178713
188713
198614
208614
218614
228614
238614
248614
258515
268614
278614
288515
298515
308416

Chance of precipitation in September

Any precipitation

Pedro do Rosário gets around 17 mm of rain over 4.2 wet days in September, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 15% and peaks near 17% on the wettest days.

0%10%20%30%151015202530
Rain chance (%)
117
217
316
415
515
614
714
814
914
1013
1114
1214
1314
1414
1514
1615
1715
1815
1915
2015
2115
2215
2315
2415
2515
2615
2715
2815
2915
3014

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the oppressive band about 95% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Muggy (%)Oppressive (%)Miserable (%)
12962
23952
33952
43961
53961
64951
74951
84960
94960
104960
114960
124960
134960
144960
154960
164960
174960
184960
194960
204960
215950
225950
235950
245950
255950
265950
276940
286940
296940
306940

Wind in September

Winds average 11 km/h in September.

Across September, daily wind ranges from about 10 km/h on the calmest days to 11 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
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 54 min at the start of September to 12 hours by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 6 minutes over September. Sunrise moves from 6:03 AM to 5:50 AM, and sunset from 5:59 PM to 5:51 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.96:035:59
211.96:025:59
311.96:025:59
412.06:025:59
512.06:015:58
612.06:015:58
712.06:005:58
812.06:005:58
912.05:595:57
1012.05:595:57
1112.05:585:57
1212.05:585:56
1312.05:585:56
1412.05:575:56
1512.05:575:56
1612.05:565:55
1712.05:565:55
1812.05:555:55
1912.05:555:54
2012.05:545:54
2112.05:545:54
2212.05:535:54
2312.05:535:53
2412.05:535:53
2512.05:525:53
2612.05:525:52
2712.05:515:52
2812.05:515:52
2912.05:505:52
3012.05:505:51

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.99 kWh/m².

For context, solar energy here swings from a low near 4.19 kWh/m² to a high of 6.1 kWh/m² in October across the year — September's 5.99 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
15.8Bright
25.8Bright
35.8Bright
45.8Bright
55.9Bright
65.9Bright
75.9Bright
85.9Bright
95.9Bright
105.9Bright
115.9Bright
126.0Bright
136.0Bright
146.0Bright
156.0Bright
166.0Bright
176.0Intense
186.0Intense
196.0Intense
206.0Intense
216.0Intense
226.0Intense
236.1Intense
246.1Intense
256.1Intense
266.1Intense
276.1Intense
286.1Intense
296.1Intense
306.1Intense
Planning a trip in September

Hazard calendar for Pedro do Rosário

In seasonPeak

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

Pedro do Rosário's monsoon runs January–May, 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 Pedro do Rosário?

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

4.1
Sightseeing
3rd-best month of the year
7.2
Beach & pool
1st-best month of the year

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

What to pack for Pedro do Rosário in September

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

In September, Pedro do Rosário sees daytime highs around 33°C and nights near 24°C. Pack light clothes. Worth having: sun protection. About 4 days see rain.

light clothessun protection

UV index in Pedro do Rosário in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Pedro do Rosário peaks around March 18 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 15 at about 10 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeMar 18UV 15Jul 15UV 10
UV index (midday)Level
Jan13Extreme
Feb14Extreme
Mar15Extreme
Apr14Extreme
May11Extreme
Jun10Extreme
Jul10Very high
Aug10Extreme
Sep12Extreme
Oct12Extreme
Nov10Extreme
Dec11Extreme

Air quality in Pedro do Rosário 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 Pedro do Rosário is worst in November — around 18 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (June, 9 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateNov 1918 µg/m³Jun 199 µg/m³
PM2.5 (µg/m³)Level
Jan15Moderate
Feb17Moderate
Mar16Moderate
Apr14Moderate
May10Good
Jun9Good
Jul9Good
Aug10Good
Sep9Good
Oct13Moderate
Nov18Moderate
Dec16Moderate
Location & terrain

Where is Pedro do Rosário?

Pedro do Rosário sits at 3.0°S, 45.4°W, 28 m above sea level, in Brazil. The nearest listed city is Matinha, 38 km away.

Topography around Pedro do Rosário

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

Within 3 km, the terrain around Pedro do Rosário has only modest variations in elevation — a maximum elevation change of 46 m around an average of 33 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 101 m; within 80 km, only modest variations in elevation — a maximum elevation change of 191 m.

The land around Pedro do Rosário is covered by trees (59%) and grassland (37%) within 3 km, trees (68%) and grassland (31%) within 16 km, and trees (44%) and grassland (44%) within 80 km.

3 km
46 m
16 km
101 m
80 km
191 m
treesgrasslandartificial surfaceswaterwetlandmangroves
September weather nearby: Matinha 38 km · Penalva 41 km · Presidente Sarney 42 km · Viana 47 km · Zé Doca 48 km · São Vicente Ferrer 53 km · Cajari 54 km · Pinheiro 58 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 Pedro do Rosário (-2.9724°, -45.3513°, elevation 28 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).