Garrafão do Norte weather in September

In September, Garrafão do Norte sees average daytime highs of 33°C and overnight lows near 23°C, with 21 mm of rain across 6 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 38% of the time in September, and the air most often feels oppressive.

Daylight stretches from about 12 hours at the start of September to 12 hours by month's end. Set against the rest of the year, September is Garrafão do Norte's 2nd-clearest and 2nd-windiest month. For the whole year in context, see Garrafão do Norte's year-round climate.

Daytime high
33°
3rd warmest
Overnight low
23°
8th coldest
Rainfall
21 mm
6 wet days
Daylight
12 hours
6:03 AM – 6:02 PM
Cloud cover
47%
2nd clearest
Wind
11 km/h
2nd windiest
Solar energy
5.94 kWh/m²
Travel score
4.0
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 Garrafão do Norte reaches about 33°C in the afternoon and slips back to 23°C overnight — a 10°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)
13223
23323
33323
43323
53323
63323
73323
83323
93323
103323
113323
123323
133323
143323
153323
163323
173323
183323
193323
203323
213323
223323
233323
243323
253323
263323
273323
283323
293323
303323

How September really feels in Garrafão do Norte

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.

Garrafão do Norte 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
Jan31° / 23°18624.812.12.7
Feb31° / 23°26325.812.12.6
Mar30° / 23°35629.9122.5
Apr30° / 23°33628.7122.5
May31° / 23°19525.911.92.9
Jun31° / 22°9318.811.93.6
Jul31° / 22°6315.111.94.1
Aug32° / 22°308.211.94.3
Sep33° / 23°216124.0
Oct33° / 23°235.3123.6
Nov33° / 24°387.112.13.4
Dec33° / 24°8114.412.13.2

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 38% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 42% of September, with mostly cloudy or overcast conditions the remaining 20%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
18218
28218
38218
48218
58119
68119
78119
88119
98119
108119
118119
128119
138119
148119
158119
168020
178020
188020
197921
208020
218020
228020
238020
248020
258020
267921
277921
287921
297822
307723

Chance of precipitation in September

Any precipitation

Garrafão do Norte gets around 21 mm of rain over 6 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 20% and peaks near 23% on the wettest days.

0%10%20%30%151015202530
Rain chance (%)
123
223
322
422
521
621
721
821
921
1021
1121
1221
1321
1421
1521
1620
1720
1820
1920
2020
2120
2220
2319
2419
2519
2618
2718
2818
2917
3017

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 94% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Muggy (%)Oppressive (%)
1298
2298
3397
4397
5397
6496
7496
8496
9595
10595
11595
12595
13595
14595
15595
16694
17694
18694
19694
20793
21793
22793
23793
24892
25892
26892
27991
28991
291090
301090

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
711calm
811calm
911calm
1011calm
1111calm
1211calm
1311calm
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 12 hours 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 0 minutes over September. Sunrise moves from 6:09 AM to 5:57 AM, and sunset from 6:07 PM to 5:58 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.06:096:07
212.06:096:07
312.06:086:06
412.06:086:06
512.06:076:06
612.06:076:05
712.06:076:05
812.06:066:05
912.06:066:04
1012.06:056:04
1112.06:056:04
1212.06:056:03
1312.06:046:03
1412.06:046:03
1512.06:036:03
1612.06:036:02
1712.06:026:02
1812.06:026:02
1912.06:026:01
2012.06:016:01
2112.06:016:01
2212.06:006:00
2312.06:006:00
2412.05:596:00
2512.05:595:59
2612.05:595:59
2712.05:585:59
2812.05:585:59
2912.05:575:58
3012.05:575:58

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.94 kWh/m².

For context, solar energy here swings from a low near 4.1 kWh/m² to a high of 6.03 kWh/m² in October across the year — September's 5.94 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
15.8Bright
25.8Bright
35.8Bright
45.8Bright
55.8Bright
65.8Bright
75.8Bright
85.8Bright
95.9Bright
105.9Bright
115.9Bright
125.9Bright
135.9Bright
145.9Bright
155.9Bright
165.9Bright
175.9Bright
186.0Bright
196.0Bright
206.0Bright
216.0Bright
226.0Intense
236.0Intense
246.0Intense
256.0Intense
266.0Intense
276.0Intense
286.1Intense
296.1Intense
306.1Intense
Planning a trip in September

Hazard calendar for Garrafão do Norte

In seasonPeak

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

Garrafão do Norte'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 Garrafão do Norte?

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

4.0
Sightseeing
3rd-best month of the year
6.9
Beach & pool
1st-best month of the year

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

What to pack for Garrafão do Norte in September

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

In September, Garrafão do Norte sees daytime highs around 33°C and nights near 23°C. Pack light clothes. Worth having: sun protection. About 6 days see rain.

light clothessun protection

UV index in Garrafão do Norte 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 Garrafão do Norte peaks around March 17 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near November 21 at about 10 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeMar 17UV 15Nov 21UV 10
UV index (midday)Level
Jan13Extreme
Feb14Extreme
Mar15Extreme
Apr14Extreme
May12Extreme
Jun11Extreme
Jul10Extreme
Aug11Extreme
Sep12Extreme
Oct12Extreme
Nov10Extreme
Dec11Extreme

Air quality in Garrafão do Norte 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 Garrafão do Norte is worst in November — around 28 µg/m³ PM2.5 (moderate), about 3.5× the cleanest month (June, 8 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateNov 2028 µg/m³Jun 208 µg/m³
PM2.5 (µg/m³)Level
Jan17Moderate
Feb18Moderate
Mar17Moderate
Apr14Moderate
May9Good
Jun8Good
Jul9Good
Aug10Good
Sep12Good
Oct16Moderate
Nov28Moderate
Dec25Moderate
Location & terrain

Where is Garrafão do Norte?

Garrafão do Norte sits at 1.9°S, 47.1°W, 43 m above sea level, in Brazil. The nearest listed city is Capitão Poço, 21 km away.

Topography around Garrafão do Norte

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

Within 3 km, the terrain around Garrafão do Norte has only modest variations in elevation — a maximum elevation change of 44 m around an average of 54 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 90 m; within 80 km, only modest variations in elevation — a maximum elevation change of 206 m.

The land around Garrafão do Norte is covered by grassland (60%) and trees (34%) within 3 km, trees (50%) and grassland (50%) within 16 km, and trees (58%) and grassland (41%) within 80 km.

3 km
44 m
16 km
90 m
80 km
206 m
treesgrasslandartificial surfaces
September weather nearby: Capitão Poço 21 km · Nova Esperança do Piriá 38 km · Ourém 43 km · Irituia 47 km · Santa Luzia do Pará 49 km · Mãe do Rio 57 km · São Miguel do Guamá 59 km · Cachoeira do Piriá 60 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 Garrafão do Norte (-1.9342°, -47.0525°, elevation 43 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).