Anapu weather in September

In September, Anapu sees average daytime highs of 34°C and overnight lows near 23°C, with 39 mm of rain across 8.1 wet days and about 12 hours of daylight. It is the 1st-warmest and 11th-wettest month of the year here.

Day-to-day highs hold fairly steady near 34°C through the month. The sky is clear or mostly clear about 40% 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 Anapu's 3rd-clearest and 1st-windiest month. For the whole year in context, see Anapu's year-round climate.

Daytime high
34°
1st warmest
Overnight low
23°
11th coldest
Rainfall
39 mm
8.1 wet days
Daylight
12 hours
6:20 AM – 6:19 PM
Cloud cover
49%
3rd clearest
Wind
7 km/h
1st windiest
Solar energy
6.04 kWh/m²
Travel score
3.1
out of 10

Anapu is main settlement in the municipality of the same name.

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 34°C through the month.

A typical September day in Anapu reaches about 34°C in the afternoon and slips back to 23°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 33°C and 36°C. Set against its neighbours, September runs on par with August and on par with October.

20°25°30°35°40°151015202530
Avg high (°C)Avg low (°C)
13423
23423
33423
43423
53423
63423
73423
83423
93423
103423
113423
123423
133423
143423
153423
163423
173423
183423
193423
203423
213423
223423
233423
243423
253423
263423
273423
283423
293423
303423

How September really feels in Anapu

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.

Anapu weather by month

How September compares with the rest of the year at a glance. September is the 1st-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 23°30128.612.22.6
Feb30° / 23°33526.512.12.6
Mar30° / 23°42029.6122.5
Apr30° / 23°33629.111.92.5
May31° / 23°19825.711.82.9
Jun31° / 22°7815.211.83.8
Jul32° / 22°429.611.84.1
Aug34° / 22°286.111.93.5
Sep34° / 23°398.1123.1
Oct34° / 23°7812.912.12.8
Nov33° / 23°11816.712.22.8
Dec32° / 23°19823.112.22.7

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 40% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 31% of September, with mostly cloudy or overcast conditions the remaining 29%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17525
27525
37525
47426
57426
67327
77327
87327
97426
107426
117426
127426
137426
147426
157426
167327
177228
187228
197228
207129
217129
226931
236931
246832
256832
266634
276634
286535
296436
306337

Chance of precipitation in September

Any precipitation

Anapu gets around 39 mm of rain over 8.1 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 27% and peaks near 33% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%151015202530
Rain chance (%)
124
224
325
425
526
626
726
826
926
1026
1126
1226
1326
1426
1526
1626
1726
1826
1926
2026
2127
2227
2328
2428
2529
2630
2730
2831
2932
3033

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 80% of days. Sticky, muggy-or-worse air turns up on roughly 99% of them.

0%25%50%75%100%151015202530
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1017821
2017821
3017821
4018811
5018811
6018811
7119791
8119791
9119791
10119791
11119791
12119782
13119782
14119791
15119791
16119791
17119791
18119791
19118801
20018811
21018811
22017821
23017821
24017821
25016831
26016831
27016831
28016831
29016822
30015832

Wind in September

Winds average 7 km/h in September, the windiest month of the year.

Across September, daily wind ranges from about 7 km/h on the calmest days to 7 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm

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 6:27 AM to 6:13 AM, and sunset from 6:22 PM to 6:15 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.96:276:22
211.96:266:22
311.96:266:22
411.96:256:22
511.96:256:22
611.96:246:21
712.06:246:21
812.06:236:21
912.06:236:20
1012.06:226:20
1112.06:226:20
1212.06:226:20
1312.06:216:19
1412.06:216:19
1512.06:206:19
1612.06:206:19
1712.06:196:18
1812.06:196:18
1912.06:186:18
2012.06:186:17
2112.06:176:17
2212.06:176:17
2312.06:166:17
2412.06:166:16
2512.06:156:16
2612.06:156:16
2712.06:156:16
2812.06:146:15
2912.06:146:15
3012.06:136:15

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.04 kWh/m².

For context, solar energy here swings from a low near 3.85 kWh/m² to a high of 6.07 kWh/m² in October across the year — September's 6.04 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
15.8Bright
25.8Bright
35.8Bright
45.9Bright
55.9Bright
65.9Bright
75.9Bright
85.9Bright
96.0Bright
106.0Bright
116.0Bright
126.0Intense
136.0Intense
146.0Intense
156.0Intense
166.1Intense
176.1Intense
186.1Intense
196.1Intense
206.1Intense
216.1Intense
226.1Intense
236.2Intense
246.2Intense
256.2Intense
266.2Intense
276.2Intense
286.2Intense
296.2Intense
306.2Intense
Planning a trip in September

Hazard calendar for Anapu

In seasonPeak

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

Anapu's monsoon runs December–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 Anapu?

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

3.1
Sightseeing
4th-best month of the year
6.2
Beach & pool
3rd-best month of the year

September is a weaker month for outdoor sightseeing in Anapu. The water and warmth also suit a beach or pool day.

What to pack for Anapu in September

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

In September, Anapu sees daytime highs around 34°C and nights near 23°C. Pack light clothes and sun protection. Worth having: rain gear. About 8 days see rain.

light clothessun protectionrain gear

UV index in Anapu 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 Anapu peaks around March 17 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near November 18 at about 10 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeVery highExtremeMar 17UV 15Nov 18UV 10
UV index (midday)Level
Jan13Extreme
Feb14Extreme
Mar15Extreme
Apr14Extreme
May11Extreme
Jun10Extreme
Jul10Very high
Aug10Extreme
Sep12Extreme
Oct11Extreme
Nov9Very high
Dec10Extreme

Air quality in Anapu 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 Anapu is worst in October — around 56 µg/m³ PM2.5 (unhealthy), about 7.1× the cleanest month (June, 8 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModeratePoorUnhealthyModerateOct 2456 µg/m³Jun 228 µg/m³
PM2.5 (µg/m³)Level
Jan14Moderate
Feb15Moderate
Mar14Moderate
Apr13Moderate
May10Good
Jun8Good
Jul8Good
Aug14Moderate
Sep30Moderate
Oct56Unhealthy
Nov56Unhealthy
Dec20Moderate
Location & terrain

Where is Anapu?

Anapu sits at 3.5°S, 51.2°W, 59 m above sea level, in Brazil. The nearest listed city is Pacajá, 74 km away.

Topography around Anapu

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

Within 3 km, the terrain around Anapu has only modest variations in elevation — a maximum elevation change of 78 m around an average of 68 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 228 m; within 80 km, significant variations in elevation — a maximum elevation change of 388 m.

The land around Anapu is covered by grassland (54%) and trees (35%) within 3 km, trees (58%) and grassland (42%) within 16 km, and trees (76%) and grassland (22%) within 80 km.

3 km
78 m
16 km
228 m
80 km
388 m
treesgrasslandartificial surfaceswater
September weather nearby: Pacajá 74 km · Vitória do Xingu 112 km · Altamira 116 km · Senador José Porfírio 129 km · Brasil Novo 150 km · Tucuruí 172 km · Portel 176 km · Novo Repartimento 182 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 Anapu (-3.4722°, -51.1978°, elevation 59 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).